Aleksandar Markovic <aleksandar.markovic@mips.com> <aleksandar.markovic@imgtec.com>
Alex Shi <alex.shi@linux.alibaba.com> <alex.shi@intel.com>
Alex Shi <alex.shi@linux.alibaba.com> <alex.shi@linaro.org>
+Alexandre Belloni <alexandre.belloni@bootlin.com> <alexandre.belloni@free-electrons.com>
Alexei Starovoitov <ast@kernel.org> <ast@plumgrid.com>
Alexei Starovoitov <ast@kernel.org> <alexei.starovoitov@gmail.com>
Alexei Starovoitov <ast@kernel.org> <ast@fb.com>
Requires a separate RTC_PIE_ON call to enable the periodic
interrupts.
+ * RTC_VL_READ: Read the voltage inputs status of the RTC when
+ supported. The value is a bit field of RTC_VL_*, giving the
+ status of the main and backup voltages.
+
+ * RTC_VL_CLEAR: Clear the voltage status of the RTC. Some RTCs
+ need user interaction when the backup power provider is
+ replaced or charged to be able to clear the status.
+
The ioctl() calls supported by the older /dev/rtc interface are
also supported by the newer RTC class framework. However,
because the chips and systems are not standardized, some PC/AT
+++ /dev/null
-Atmel AT91RM9200 Real Time Clock
-
-Required properties:
-- compatible: should be: "atmel,at91rm9200-rtc" or "atmel,at91sam9x5-rtc"
-- reg: physical base address of the controller and length of memory mapped
- region.
-- interrupts: rtc alarm/event interrupt
-- clocks: phandle to input clock.
-
-Example:
-
-rtc@fffffe00 {
- compatible = "atmel,at91rm9200-rtc";
- reg = <0xfffffe00 0x100>;
- interrupts = <1 4 7>;
- clocks = <&clk32k>;
-};
--- /dev/null
+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/rtc/atmel,at91rm9200-rtc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Atmel AT91 RTC Device Tree Bindings
+
+allOf:
+ - $ref: "rtc.yaml#"
+
+maintainers:
+ - Alexandre Belloni <alexandre.belloni@bootlin.com>
+
+properties:
+ compatible:
+ enum:
+ - atmel,at91rm9200-rtc
+ - atmel,at91sam9x5-rtc
+ - atmel,sama5d4-rtc
+ - atmel,sama5d2-rtc
+ - microchip,sam9x60-rtc
+
+ reg:
+ maxItems: 1
+
+ interrupts:
+ maxItems: 1
+
+ clocks:
+ maxItems: 1
+
+required:
+ - compatible
+ - reg
+ - interrupts
+ - clocks
+
+additionalProperties: false
+
+examples:
+ - |
+ rtc@fffffe00 {
+ compatible = "atmel,at91rm9200-rtc";
+ reg = <0xfffffe00 0x100>;
+ interrupts = <1 4 7>;
+ clocks = <&clk32k>;
+ };
+...
config RTC_DRV_DS1307
tristate "Dallas/Maxim DS1307/37/38/39/40/41, ST M41T00, EPSON RX-8025, ISL12057"
+ select REGMAP_I2C
help
If you say yes here you get support for various compatible RTC
chips (often with battery backup) connected with I2C. This driver
config RTC_DRV_RX8581
tristate "Epson RX-8571/RX-8581"
+ select REGMAP_I2C
help
If you say yes here you will get support for the Epson RX-8571/
RX-8581.
config RTC_DRV_RV3028
tristate "Micro Crystal RV3028"
+ select REGMAP_I2C
help
If you say yes here you get support for the Micro Crystal
RV3028.
will be called rtc-s5m.
config RTC_DRV_SD3078
- tristate "ZXW Shenzhen whwave SD3078"
- help
- If you say yes here you get support for the ZXW Shenzhen whwave
- SD3078 RTC chips.
+ tristate "ZXW Shenzhen whwave SD3078"
+ select REGMAP_I2C
+ help
+ If you say yes here you get support for the ZXW Shenzhen whwave
+ SD3078 RTC chips.
- This driver can also be built as a module. If so, the module
- will be called rtc-sd3078
+ This driver can also be built as a module. If so, the module
+ will be called rtc-sd3078
endif # I2C
default m if I2C=m
default y if I2C=y
default y if SPI_MASTER=y
- select REGMAP_I2C if I2C
- select REGMAP_SPI if SPI_MASTER
comment "SPI and I2C RTC drivers"
config RTC_DRV_DS3232
tristate "Dallas/Maxim DS3232/DS3234"
depends on RTC_I2C_AND_SPI
+ select REGMAP_I2C if I2C
+ select REGMAP_SPI if SPI_MASTER
help
If you say yes here you get support for Dallas Semiconductor
DS3232 and DS3234 real-time clock chips. If an interrupt is associated
config RTC_DRV_PCF2127
tristate "NXP PCF2127"
depends on RTC_I2C_AND_SPI
+ select REGMAP_I2C if I2C
+ select REGMAP_SPI if SPI_MASTER
select WATCHDOG_CORE if WATCHDOG
help
If you say yes here you get support for the NXP PCF2127/29 RTC
config RTC_DRV_RV3029C2
tristate "Micro Crystal RV3029/3049"
depends on RTC_I2C_AND_SPI
+ select REGMAP_I2C if I2C
+ select REGMAP_SPI if SPI_MASTER
help
If you say yes here you get support for the Micro Crystal
RV3029 and RV3049 RTC chips.
if (status < 0)
return status;
- tmp = !!(status & ABX8XX_STATUS_BLF);
+ tmp = status & ABX8XX_STATUS_BLF ? RTC_VL_BACKUP_LOW : 0;
- if (copy_to_user((void __user *)arg, &tmp, sizeof(int)))
- return -EFAULT;
-
- return 0;
+ return put_user(tmp, (unsigned int __user *)arg);
case RTC_VL_CLR:
status = i2c_smbus_read_byte_data(client, ABX8XX_REG_STATUS);
return PTR_ERR(priv->iobase);
priv->clk = devm_clk_get(dev, "ahb");
+ if (IS_ERR(priv->clk))
+ return PTR_ERR(priv->clk);
+
ret = clk_prepare_enable(priv->clk);
if (ret) {
dev_err(dev, "Failed to enable clk!\n");
*/
#include <linux/bcd.h>
+#include <linux/bitfield.h>
#include <linux/clk.h>
#include <linux/completion.h>
#include <linux/interrupt.h>
#include <linux/time.h>
#include <linux/uaccess.h>
-#include "rtc-at91rm9200.h"
+#define AT91_RTC_CR 0x00 /* Control Register */
+#define AT91_RTC_UPDTIM BIT(0) /* Update Request Time Register */
+#define AT91_RTC_UPDCAL BIT(1) /* Update Request Calendar Register */
+
+#define AT91_RTC_MR 0x04 /* Mode Register */
+
+#define AT91_RTC_TIMR 0x08 /* Time Register */
+#define AT91_RTC_SEC GENMASK(6, 0) /* Current Second */
+#define AT91_RTC_MIN GENMASK(14, 8) /* Current Minute */
+#define AT91_RTC_HOUR GENMASK(21, 16) /* Current Hour */
+#define AT91_RTC_AMPM BIT(22) /* Ante Meridiem Post Meridiem Indicator */
+
+#define AT91_RTC_CALR 0x0c /* Calendar Register */
+#define AT91_RTC_CENT GENMASK(6, 0) /* Current Century */
+#define AT91_RTC_YEAR GENMASK(15, 8) /* Current Year */
+#define AT91_RTC_MONTH GENMASK(20, 16) /* Current Month */
+#define AT91_RTC_DAY GENMASK(23, 21) /* Current Day */
+#define AT91_RTC_DATE GENMASK(29, 24) /* Current Date */
+
+#define AT91_RTC_TIMALR 0x10 /* Time Alarm Register */
+#define AT91_RTC_SECEN BIT(7) /* Second Alarm Enable */
+#define AT91_RTC_MINEN BIT(15) /* Minute Alarm Enable */
+#define AT91_RTC_HOUREN BIT(23) /* Hour Alarm Enable */
+
+#define AT91_RTC_CALALR 0x14 /* Calendar Alarm Register */
+#define AT91_RTC_MTHEN BIT(23) /* Month Alarm Enable */
+#define AT91_RTC_DATEEN BIT(31) /* Date Alarm Enable */
+
+#define AT91_RTC_SR 0x18 /* Status Register */
+#define AT91_RTC_ACKUPD BIT(0) /* Acknowledge for Update */
+#define AT91_RTC_ALARM BIT(1) /* Alarm Flag */
+#define AT91_RTC_SECEV BIT(2) /* Second Event */
+#define AT91_RTC_TIMEV BIT(3) /* Time Event */
+#define AT91_RTC_CALEV BIT(4) /* Calendar Event */
+
+#define AT91_RTC_SCCR 0x1c /* Status Clear Command Register */
+#define AT91_RTC_IER 0x20 /* Interrupt Enable Register */
+#define AT91_RTC_IDR 0x24 /* Interrupt Disable Register */
+#define AT91_RTC_IMR 0x28 /* Interrupt Mask Register */
+
+#define AT91_RTC_VER 0x2c /* Valid Entry Register */
+#define AT91_RTC_NVTIM BIT(0) /* Non valid Time */
+#define AT91_RTC_NVCAL BIT(1) /* Non valid Calendar */
+#define AT91_RTC_NVTIMALR BIT(2) /* Non valid Time Alarm */
+#define AT91_RTC_NVCALALR BIT(3) /* Non valid Calendar Alarm */
#define at91_rtc_read(field) \
readl_relaxed(at91_rtc_regs + field)
} while ((time != at91_rtc_read(timereg)) ||
(date != at91_rtc_read(calreg)));
- tm->tm_sec = bcd2bin((time & AT91_RTC_SEC) >> 0);
- tm->tm_min = bcd2bin((time & AT91_RTC_MIN) >> 8);
- tm->tm_hour = bcd2bin((time & AT91_RTC_HOUR) >> 16);
+ tm->tm_sec = bcd2bin(FIELD_GET(AT91_RTC_SEC, time));
+ tm->tm_min = bcd2bin(FIELD_GET(AT91_RTC_MIN, time));
+ tm->tm_hour = bcd2bin(FIELD_GET(AT91_RTC_HOUR, time));
/*
* The Calendar Alarm register does not have a field for
* the year - so these will return an invalid value.
*/
tm->tm_year = bcd2bin(date & AT91_RTC_CENT) * 100; /* century */
- tm->tm_year += bcd2bin((date & AT91_RTC_YEAR) >> 8); /* year */
+ tm->tm_year += bcd2bin(FIELD_GET(AT91_RTC_YEAR, date)); /* year */
- tm->tm_wday = bcd2bin((date & AT91_RTC_DAY) >> 21) - 1; /* day of the week [0-6], Sunday=0 */
- tm->tm_mon = bcd2bin((date & AT91_RTC_MONTH) >> 16) - 1;
- tm->tm_mday = bcd2bin((date & AT91_RTC_DATE) >> 24);
+ tm->tm_wday = bcd2bin(FIELD_GET(AT91_RTC_DAY, date)) - 1; /* day of the week [0-6], Sunday=0 */
+ tm->tm_mon = bcd2bin(FIELD_GET(AT91_RTC_MONTH, date)) - 1;
+ tm->tm_mday = bcd2bin(FIELD_GET(AT91_RTC_DATE, date));
}
/*
at91_rtc_write_idr(AT91_RTC_ACKUPD);
at91_rtc_write(AT91_RTC_TIMR,
- bin2bcd(tm->tm_sec) << 0
- | bin2bcd(tm->tm_min) << 8
- | bin2bcd(tm->tm_hour) << 16);
+ FIELD_PREP(AT91_RTC_SEC, bin2bcd(tm->tm_sec))
+ | FIELD_PREP(AT91_RTC_MIN, bin2bcd(tm->tm_min))
+ | FIELD_PREP(AT91_RTC_HOUR, bin2bcd(tm->tm_hour)));
at91_rtc_write(AT91_RTC_CALR,
- bin2bcd((tm->tm_year + 1900) / 100) /* century */
- | bin2bcd(tm->tm_year % 100) << 8 /* year */
- | bin2bcd(tm->tm_mon + 1) << 16 /* tm_mon starts at zero */
- | bin2bcd(tm->tm_wday + 1) << 21 /* day of the week [0-6], Sunday=0 */
- | bin2bcd(tm->tm_mday) << 24);
+ FIELD_PREP(AT91_RTC_CENT,
+ bin2bcd((tm->tm_year + 1900) / 100))
+ | FIELD_PREP(AT91_RTC_YEAR, bin2bcd(tm->tm_year % 100))
+ | FIELD_PREP(AT91_RTC_MONTH, bin2bcd(tm->tm_mon + 1))
+ | FIELD_PREP(AT91_RTC_DAY, bin2bcd(tm->tm_wday + 1))
+ | FIELD_PREP(AT91_RTC_DATE, bin2bcd(tm->tm_mday)));
/* Restart Time/Calendar */
cr = at91_rtc_read(AT91_RTC_CR);
*/
static int at91_rtc_setalarm(struct device *dev, struct rtc_wkalrm *alrm)
{
- struct rtc_time tm;
-
- at91_rtc_decodetime(AT91_RTC_TIMR, AT91_RTC_CALR, &tm);
-
- tm.tm_mon = alrm->time.tm_mon;
- tm.tm_mday = alrm->time.tm_mday;
- tm.tm_hour = alrm->time.tm_hour;
- tm.tm_min = alrm->time.tm_min;
- tm.tm_sec = alrm->time.tm_sec;
+ struct rtc_time tm = alrm->time;
at91_rtc_write_idr(AT91_RTC_ALARM);
at91_rtc_write(AT91_RTC_TIMALR,
- bin2bcd(tm.tm_sec) << 0
- | bin2bcd(tm.tm_min) << 8
- | bin2bcd(tm.tm_hour) << 16
+ FIELD_PREP(AT91_RTC_SEC, bin2bcd(alrm->time.tm_sec))
+ | FIELD_PREP(AT91_RTC_MIN, bin2bcd(alrm->time.tm_min))
+ | FIELD_PREP(AT91_RTC_HOUR, bin2bcd(alrm->time.tm_hour))
| AT91_RTC_HOUREN | AT91_RTC_MINEN | AT91_RTC_SECEN);
at91_rtc_write(AT91_RTC_CALALR,
- bin2bcd(tm.tm_mon + 1) << 16 /* tm_mon starts at zero */
- | bin2bcd(tm.tm_mday) << 24
+ FIELD_PREP(AT91_RTC_MONTH, bin2bcd(alrm->time.tm_mon + 1))
+ | FIELD_PREP(AT91_RTC_DATE, bin2bcd(alrm->time.tm_mday))
| AT91_RTC_DATEEN | AT91_RTC_MTHEN);
if (alrm->enabled) {
return 0;
}
-/*
- * Provide additional RTC information in /proc/driver/rtc
- */
-static int at91_rtc_proc(struct device *dev, struct seq_file *seq)
-{
- unsigned long imr = at91_rtc_read_imr();
-
- seq_printf(seq, "update_IRQ\t: %s\n",
- (imr & AT91_RTC_ACKUPD) ? "yes" : "no");
- seq_printf(seq, "periodic_IRQ\t: %s\n",
- (imr & AT91_RTC_SECEV) ? "yes" : "no");
-
- return 0;
-}
/*
* IRQ handler for the RTC
}, {
.compatible = "atmel,at91sam9x5-rtc",
.data = &at91sam9x5_config,
+ }, {
+ .compatible = "atmel,sama5d4-rtc",
+ .data = &at91rm9200_config,
+ }, {
+ .compatible = "atmel,sama5d2-rtc",
+ .data = &at91rm9200_config,
}, {
/* sentinel */
}
.set_time = at91_rtc_settime,
.read_alarm = at91_rtc_readalarm,
.set_alarm = at91_rtc_setalarm,
- .proc = at91_rtc_proc,
.alarm_irq_enable = at91_rtc_alarm_irq_enable,
};
+++ /dev/null
-/* SPDX-License-Identifier: GPL-2.0-or-later */
-/*
- * arch/arm/mach-at91/include/mach/at91_rtc.h
- *
- * Copyright (C) 2005 Ivan Kokshaysky
- * Copyright (C) SAN People
- *
- * Real Time Clock (RTC) - System peripheral registers.
- * Based on AT91RM9200 datasheet revision E.
- */
-
-#ifndef AT91_RTC_H
-#define AT91_RTC_H
-
-#define AT91_RTC_CR 0x00 /* Control Register */
-#define AT91_RTC_UPDTIM (1 << 0) /* Update Request Time Register */
-#define AT91_RTC_UPDCAL (1 << 1) /* Update Request Calendar Register */
-#define AT91_RTC_TIMEVSEL (3 << 8) /* Time Event Selection */
-#define AT91_RTC_TIMEVSEL_MINUTE (0 << 8)
-#define AT91_RTC_TIMEVSEL_HOUR (1 << 8)
-#define AT91_RTC_TIMEVSEL_DAY24 (2 << 8)
-#define AT91_RTC_TIMEVSEL_DAY12 (3 << 8)
-#define AT91_RTC_CALEVSEL (3 << 16) /* Calendar Event Selection */
-#define AT91_RTC_CALEVSEL_WEEK (0 << 16)
-#define AT91_RTC_CALEVSEL_MONTH (1 << 16)
-#define AT91_RTC_CALEVSEL_YEAR (2 << 16)
-
-#define AT91_RTC_MR 0x04 /* Mode Register */
-#define AT91_RTC_HRMOD (1 << 0) /* 12/24 Hour Mode */
-
-#define AT91_RTC_TIMR 0x08 /* Time Register */
-#define AT91_RTC_SEC (0x7f << 0) /* Current Second */
-#define AT91_RTC_MIN (0x7f << 8) /* Current Minute */
-#define AT91_RTC_HOUR (0x3f << 16) /* Current Hour */
-#define AT91_RTC_AMPM (1 << 22) /* Ante Meridiem Post Meridiem Indicator */
-
-#define AT91_RTC_CALR 0x0c /* Calendar Register */
-#define AT91_RTC_CENT (0x7f << 0) /* Current Century */
-#define AT91_RTC_YEAR (0xff << 8) /* Current Year */
-#define AT91_RTC_MONTH (0x1f << 16) /* Current Month */
-#define AT91_RTC_DAY (7 << 21) /* Current Day */
-#define AT91_RTC_DATE (0x3f << 24) /* Current Date */
-
-#define AT91_RTC_TIMALR 0x10 /* Time Alarm Register */
-#define AT91_RTC_SECEN (1 << 7) /* Second Alarm Enable */
-#define AT91_RTC_MINEN (1 << 15) /* Minute Alarm Enable */
-#define AT91_RTC_HOUREN (1 << 23) /* Hour Alarm Enable */
-
-#define AT91_RTC_CALALR 0x14 /* Calendar Alarm Register */
-#define AT91_RTC_MTHEN (1 << 23) /* Month Alarm Enable */
-#define AT91_RTC_DATEEN (1 << 31) /* Date Alarm Enable */
-
-#define AT91_RTC_SR 0x18 /* Status Register */
-#define AT91_RTC_ACKUPD (1 << 0) /* Acknowledge for Update */
-#define AT91_RTC_ALARM (1 << 1) /* Alarm Flag */
-#define AT91_RTC_SECEV (1 << 2) /* Second Event */
-#define AT91_RTC_TIMEV (1 << 3) /* Time Event */
-#define AT91_RTC_CALEV (1 << 4) /* Calendar Event */
-
-#define AT91_RTC_SCCR 0x1c /* Status Clear Command Register */
-#define AT91_RTC_IER 0x20 /* Interrupt Enable Register */
-#define AT91_RTC_IDR 0x24 /* Interrupt Disable Register */
-#define AT91_RTC_IMR 0x28 /* Interrupt Mask Register */
-
-#define AT91_RTC_VER 0x2c /* Valid Entry Register */
-#define AT91_RTC_NVTIM (1 << 0) /* Non valid Time */
-#define AT91_RTC_NVCAL (1 << 1) /* Non valid Calendar */
-#define AT91_RTC_NVTIMALR (1 << 2) /* Non valid Time Alarm */
-#define AT91_RTC_NVCALALR (1 << 3) /* Non valid Calendar Alarm */
-
-#endif
rtc_cmos_int_handler = cmos_interrupt;
retval = request_irq(rtc_irq, rtc_cmos_int_handler,
- IRQF_SHARED, dev_name(&cmos_rtc.rtc->dev),
+ 0, dev_name(&cmos_rtc.rtc->dev),
cmos_rtc.rtc);
if (retval < 0) {
dev_dbg(dev, "IRQ %d is already in use\n", rtc_irq);
/* Enable use_acpi_alarm mode for Intel platforms no earlier than 2015 */
static void use_acpi_alarm_quirks(void)
{
- int year;
-
if (boot_cpu_data.x86_vendor != X86_VENDOR_INTEL)
return;
if (!is_hpet_enabled())
return;
- if (dmi_get_date(DMI_BIOS_DATE, &year, NULL, NULL) && year >= 2015)
- use_acpi_alarm = true;
+ if (dmi_get_bios_year() < 2015)
+ return;
+
+ use_acpi_alarm = true;
}
#else
static inline void use_acpi_alarm_quirks(void) { }
* hardcode it on systems with a legacy PIC.
*/
if (nr_legacy_irqs())
- irq = 8;
+ irq = RTC_IRQ;
#endif
return cmos_do_probe(&pnp->dev,
pnp_get_resource(pnp, IORESOURCE_IO, 0), irq);
MODULE_DEVICE_TABLE(spi, ds1343_id);
struct ds1343_priv {
- struct spi_device *spi;
struct rtc_device *rtc;
struct regmap *map;
int irq;
if (!priv)
return -ENOMEM;
- priv->spi = spi;
-
/* RTC DS1347 works in spi mode 3 and
- * its chip select is active high
+ * its chip select is active high. Active high should be defined as
+ * "inverse polarity" as GPIO-based chip selects can be logically
+ * active high but inverted by the GPIO library.
*/
- spi->mode = SPI_MODE_3 | SPI_CS_HIGH;
+ spi->mode |= SPI_MODE_3;
+ spi->mode ^= SPI_CS_HIGH;
spi->bits_per_word = 8;
res = spi_setup(spi);
if (res)
struct hym8563 {
struct i2c_client *client;
struct rtc_device *rtc;
- bool valid;
#ifdef CONFIG_COMMON_CLK
struct clk_hw clkout_hw;
#endif
static int hym8563_rtc_read_time(struct device *dev, struct rtc_time *tm)
{
struct i2c_client *client = to_i2c_client(dev);
- struct hym8563 *hym8563 = i2c_get_clientdata(client);
u8 buf[7];
int ret;
- if (!hym8563->valid) {
- dev_warn(&client->dev, "no valid clock/calendar values available\n");
- return -EPERM;
- }
-
ret = i2c_smbus_read_i2c_block_data(client, HYM8563_SEC, 7, buf);
if (ret < 0)
return ret;
+ if (buf[0] & HYM8563_SEC_VL) {
+ dev_warn(&client->dev,
+ "no valid clock/calendar values available\n");
+ return -EINVAL;
+ }
+
tm->tm_sec = bcd2bin(buf[0] & HYM8563_SEC_MASK);
tm->tm_min = bcd2bin(buf[1] & HYM8563_MIN_MASK);
tm->tm_hour = bcd2bin(buf[2] & HYM8563_HOUR_MASK);
static int hym8563_rtc_set_time(struct device *dev, struct rtc_time *tm)
{
struct i2c_client *client = to_i2c_client(dev);
- struct hym8563 *hym8563 = i2c_get_clientdata(client);
u8 buf[7];
int ret;
if (ret < 0)
return ret;
- hym8563->valid = true;
-
return 0;
}
if (ret < 0)
return ret;
- hym8563->valid = !(ret & HYM8563_SEC_VL);
dev_dbg(&client->dev, "rtc information is %s\n",
- hym8563->valid ? "valid" : "invalid");
+ (ret & HYM8563_SEC_VL) ? "invalid" : "valid");
hym8563->rtc = devm_rtc_device_register(&client->dev, client->name,
&hym8563_rtc_ops, THIS_MODULE);
+// SPDX-License-Identifier: GPL-2.0
/*
* MOXA ART RTC driver.
*
*
* Based on code from
* Moxa Technology Co., Ltd. <www.moxa.com>
- *
- * This file is licensed under the terms of the GNU General Public
- * License version 2. This program is licensed "as is" without any
- * warranty of any kind, whether express or implied.
*/
#include <linux/init.h>
rtc->rtc_dev->ops = &mtk_rtc_ops;
- ret = rtc_register_device(rtc->rtc_dev);
- if (ret)
- goto out_free_irq;
-
- return 0;
-
-out_free_irq:
- free_irq(rtc->irq, rtc);
- return ret;
+ return rtc_register_device(rtc->rtc_dev);
}
#ifdef CONFIG_PM_SLEEP
break;
default:
return -ENOTSUPP;
- };
+ }
*config = pinconf_to_config_packed(param, arg);
if (ret)
return ret;
- touser = touser & PCF2127_BIT_CTRL3_BLF ? 1 : 0;
+ touser = touser & PCF2127_BIT_CTRL3_BLF ? RTC_VL_BACKUP_LOW : 0;
- if (copy_to_user((void __user *)arg, &touser, sizeof(int)))
- return -EFAULT;
- return 0;
+ return put_user(touser, (unsigned int __user *)arg);
default:
return -ENOIOCTLCMD;
}
if (ret < 0)
return ret;
- if (status & PCF85063_REG_SC_OS)
- dev_warn(&pcf85063->rtc->dev, "Voltage low, data loss detected.\n");
+ status = status & PCF85063_REG_SC_OS ? RTC_VL_DATA_INVALID : 0;
- status &= PCF85063_REG_SC_OS;
-
- if (copy_to_user((void __user *)arg, &status, sizeof(int)))
- return -EFAULT;
-
- return 0;
-
- case RTC_VL_CLR:
- ret = regmap_update_bits(pcf85063->regmap, PCF85063_REG_SC,
- PCF85063_REG_SC_OS, 0);
-
- return ret;
+ return put_user(status, (unsigned int __user *)arg);
default:
return -ENOIOCTLCMD;
ret = pcf8523_voltage_low(client);
if (ret < 0)
return ret;
+ if (ret)
+ ret = RTC_VL_BACKUP_LOW;
- if (copy_to_user((void __user *)arg, &ret, sizeof(int)))
- return -EFAULT;
+ return put_user(ret, (unsigned int __user *)arg);
- return 0;
default:
return -ENOIOCTLCMD;
}
#define PCF8563_REG_ST1 0x00 /* status */
#define PCF8563_REG_ST2 0x01
-#define PCF8563_BIT_AIE (1 << 1)
-#define PCF8563_BIT_AF (1 << 3)
+#define PCF8563_BIT_AIE BIT(1)
+#define PCF8563_BIT_AF BIT(3)
#define PCF8563_BITS_ST2_N (7 << 5)
#define PCF8563_REG_SC 0x02 /* datetime */
* 1970...2069.
*/
int c_polarity; /* 0: MO_C=1 means 19xx, otherwise MO_C=1 means 20xx */
- int voltage_low; /* incicates if a low_voltage was detected */
struct i2c_client *client;
#ifdef CONFIG_COMMON_CLK
return err;
if (buf[PCF8563_REG_SC] & PCF8563_SC_LV) {
- pcf8563->voltage_low = 1;
dev_err(&client->dev,
"low voltage detected, date/time is not reliable.\n");
return -EINVAL;
9 - PCF8563_REG_SC, buf + PCF8563_REG_SC);
}
-#ifdef CONFIG_RTC_INTF_DEV
static int pcf8563_rtc_ioctl(struct device *dev, unsigned int cmd, unsigned long arg)
{
- struct pcf8563 *pcf8563 = i2c_get_clientdata(to_i2c_client(dev));
- struct rtc_time tm;
+ struct i2c_client *client = to_i2c_client(dev);
+ int ret;
switch (cmd) {
case RTC_VL_READ:
- if (pcf8563->voltage_low)
- dev_info(dev, "low voltage detected, date/time is not reliable.\n");
-
- if (copy_to_user((void __user *)arg, &pcf8563->voltage_low,
- sizeof(int)))
- return -EFAULT;
- return 0;
- case RTC_VL_CLR:
- /*
- * Clear the VL bit in the seconds register in case
- * the time has not been set already (which would
- * have cleared it). This does not really matter
- * because of the cached voltage_low value but do it
- * anyway for consistency.
- */
- if (pcf8563_rtc_read_time(dev, &tm))
- pcf8563_rtc_set_time(dev, &tm);
-
- /* Clear the cached value. */
- pcf8563->voltage_low = 0;
+ ret = i2c_smbus_read_byte_data(client, PCF8563_REG_SC);
+ if (ret < 0)
+ return ret;
- return 0;
+ return put_user(ret & PCF8563_SC_LV ? RTC_VL_DATA_INVALID : 0,
+ (unsigned int __user *)arg);
default:
return -ENOIOCTLCMD;
}
}
-#else
-#define pcf8563_rtc_ioctl NULL
-#endif
static int pcf8563_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *tm)
{
if (ret < 0)
return ret;
- if (status & RV3028_STATUS_PORF)
- dev_warn(&rv3028->rtc->dev, "Voltage low, data loss detected.\n");
-
- status &= RV3028_STATUS_PORF;
-
- if (copy_to_user((void __user *)arg, &status, sizeof(int)))
- return -EFAULT;
-
- return 0;
-
- case RTC_VL_CLR:
- ret = regmap_update_bits(rv3028->regmap, RV3028_STATUS,
- RV3028_STATUS_PORF, 0);
-
- return ret;
+ status = status & RV3028_STATUS_PORF ? RTC_VL_DATA_INVALID : 0;
+ return put_user(status, (unsigned int __user *)arg);
default:
return -ENOIOCTLCMD;
#define RV3029_CONTROL_E2P_TOV_MASK 0x3F /* XTAL turnover temp mask */
/* user ram section */
-#define RV3029_USR1_RAM_PAGE 0x38
-#define RV3029_USR1_SECTION_LEN 0x04
-#define RV3029_USR2_RAM_PAGE 0x3C
-#define RV3029_USR2_SECTION_LEN 0x04
+#define RV3029_RAM_PAGE 0x38
+#define RV3029_RAM_SECTION_LEN 8
struct rv3029_data {
struct device *dev;
int irq;
};
-static int rv3029_read_regs(struct device *dev, u8 reg, u8 *buf,
- unsigned int len)
-{
- struct rv3029_data *rv3029 = dev_get_drvdata(dev);
-
- if ((reg > RV3029_USR1_RAM_PAGE + 7) ||
- (reg + len > RV3029_USR1_RAM_PAGE + 8))
- return -EINVAL;
-
- return regmap_bulk_read(rv3029->regmap, reg, buf, len);
-}
-
-static int rv3029_write_regs(struct device *dev, u8 reg, u8 const buf[],
- unsigned int len)
-{
- struct rv3029_data *rv3029 = dev_get_drvdata(dev);
-
- if ((reg > RV3029_USR1_RAM_PAGE + 7) ||
- (reg + len > RV3029_USR1_RAM_PAGE + 8))
- return -EINVAL;
-
- return regmap_bulk_write(rv3029->regmap, reg, buf, len);
-}
-
-static int rv3029_update_bits(struct device *dev, u8 reg, u8 mask, u8 set)
-{
- u8 buf;
- int ret;
-
- ret = rv3029_read_regs(dev, reg, &buf, 1);
- if (ret < 0)
- return ret;
- buf &= ~mask;
- buf |= set & mask;
- ret = rv3029_write_regs(dev, reg, &buf, 1);
- if (ret < 0)
- return ret;
-
- return 0;
-}
-
-static int rv3029_get_sr(struct device *dev, u8 *buf)
-{
- int ret = rv3029_read_regs(dev, RV3029_STATUS, buf, 1);
-
- if (ret < 0)
- return -EIO;
- dev_dbg(dev, "status = 0x%.2x (%d)\n", buf[0], buf[0]);
- return 0;
-}
-
-static int rv3029_set_sr(struct device *dev, u8 val)
-{
- u8 buf[1];
- int sr;
-
- buf[0] = val;
- sr = rv3029_write_regs(dev, RV3029_STATUS, buf, 1);
- dev_dbg(dev, "status = 0x%.2x (%d)\n", buf[0], buf[0]);
- if (sr < 0)
- return -EIO;
- return 0;
-}
-
-static int rv3029_eeprom_busywait(struct device *dev)
+static int rv3029_eeprom_busywait(struct rv3029_data *rv3029)
{
+ unsigned int sr;
int i, ret;
- u8 sr;
for (i = 100; i > 0; i--) {
- ret = rv3029_get_sr(dev, &sr);
+ ret = regmap_read(rv3029->regmap, RV3029_STATUS, &sr);
if (ret < 0)
break;
if (!(sr & RV3029_STATUS_EEBUSY))
usleep_range(1000, 10000);
}
if (i <= 0) {
- dev_err(dev, "EEPROM busy wait timeout.\n");
+ dev_err(rv3029->dev, "EEPROM busy wait timeout.\n");
return -ETIMEDOUT;
}
return ret;
}
-static int rv3029_eeprom_exit(struct device *dev)
+static int rv3029_eeprom_exit(struct rv3029_data *rv3029)
{
/* Re-enable eeprom refresh */
- return rv3029_update_bits(dev, RV3029_ONOFF_CTRL,
+ return regmap_update_bits(rv3029->regmap, RV3029_ONOFF_CTRL,
RV3029_ONOFF_CTRL_EERE,
RV3029_ONOFF_CTRL_EERE);
}
-static int rv3029_eeprom_enter(struct device *dev)
+static int rv3029_eeprom_enter(struct rv3029_data *rv3029)
{
+ unsigned int sr;
int ret;
- u8 sr;
/* Check whether we are in the allowed voltage range. */
- ret = rv3029_get_sr(dev, &sr);
+ ret = regmap_read(rv3029->regmap, RV3029_STATUS, &sr);
if (ret < 0)
return ret;
- if (sr & (RV3029_STATUS_VLOW1 | RV3029_STATUS_VLOW2)) {
+ if (sr & RV3029_STATUS_VLOW2)
+ return -ENODEV;
+ if (sr & RV3029_STATUS_VLOW1) {
/* We clear the bits and retry once just in case
* we had a brown out in early startup.
*/
- sr &= ~RV3029_STATUS_VLOW1;
- sr &= ~RV3029_STATUS_VLOW2;
- ret = rv3029_set_sr(dev, sr);
+ ret = regmap_update_bits(rv3029->regmap, RV3029_STATUS,
+ RV3029_STATUS_VLOW1, 0);
if (ret < 0)
return ret;
usleep_range(1000, 10000);
- ret = rv3029_get_sr(dev, &sr);
+ ret = regmap_read(rv3029->regmap, RV3029_STATUS, &sr);
if (ret < 0)
return ret;
- if (sr & (RV3029_STATUS_VLOW1 | RV3029_STATUS_VLOW2)) {
- dev_err(dev,
+ if (sr & RV3029_STATUS_VLOW1) {
+ dev_err(rv3029->dev,
"Supply voltage is too low to safely access the EEPROM.\n");
return -ENODEV;
}
}
/* Disable eeprom refresh. */
- ret = rv3029_update_bits(dev, RV3029_ONOFF_CTRL, RV3029_ONOFF_CTRL_EERE,
- 0);
+ ret = regmap_update_bits(rv3029->regmap, RV3029_ONOFF_CTRL,
+ RV3029_ONOFF_CTRL_EERE, 0);
if (ret < 0)
return ret;
/* Wait for any previous eeprom accesses to finish. */
- ret = rv3029_eeprom_busywait(dev);
+ ret = rv3029_eeprom_busywait(rv3029);
if (ret < 0)
- rv3029_eeprom_exit(dev);
+ rv3029_eeprom_exit(rv3029);
return ret;
}
-static int rv3029_eeprom_read(struct device *dev, u8 reg,
+static int rv3029_eeprom_read(struct rv3029_data *rv3029, u8 reg,
u8 buf[], size_t len)
{
int ret, err;
- err = rv3029_eeprom_enter(dev);
+ err = rv3029_eeprom_enter(rv3029);
if (err < 0)
return err;
- ret = rv3029_read_regs(dev, reg, buf, len);
+ ret = regmap_bulk_read(rv3029->regmap, reg, buf, len);
- err = rv3029_eeprom_exit(dev);
+ err = rv3029_eeprom_exit(rv3029);
if (err < 0)
return err;
return ret;
}
-static int rv3029_eeprom_write(struct device *dev, u8 reg,
+static int rv3029_eeprom_write(struct rv3029_data *rv3029, u8 reg,
u8 const buf[], size_t len)
{
+ unsigned int tmp;
int ret, err;
size_t i;
- u8 tmp;
- err = rv3029_eeprom_enter(dev);
+ err = rv3029_eeprom_enter(rv3029);
if (err < 0)
return err;
for (i = 0; i < len; i++, reg++) {
- ret = rv3029_read_regs(dev, reg, &tmp, 1);
+ ret = regmap_read(rv3029->regmap, reg, &tmp);
if (ret < 0)
break;
if (tmp != buf[i]) {
- ret = rv3029_write_regs(dev, reg, &buf[i], 1);
+ tmp = buf[i];
+ ret = regmap_write(rv3029->regmap, reg, tmp);
if (ret < 0)
break;
}
- ret = rv3029_eeprom_busywait(dev);
+ ret = rv3029_eeprom_busywait(rv3029);
if (ret < 0)
break;
}
- err = rv3029_eeprom_exit(dev);
+ err = rv3029_eeprom_exit(rv3029);
if (err < 0)
return err;
return ret;
}
-static int rv3029_eeprom_update_bits(struct device *dev,
+static int rv3029_eeprom_update_bits(struct rv3029_data *rv3029,
u8 reg, u8 mask, u8 set)
{
u8 buf;
int ret;
- ret = rv3029_eeprom_read(dev, reg, &buf, 1);
+ ret = rv3029_eeprom_read(rv3029, reg, &buf, 1);
if (ret < 0)
return ret;
buf &= ~mask;
buf |= set & mask;
- ret = rv3029_eeprom_write(dev, reg, &buf, 1);
+ ret = rv3029_eeprom_write(rv3029, reg, &buf, 1);
if (ret < 0)
return ret;
struct device *dev = dev_id;
struct rv3029_data *rv3029 = dev_get_drvdata(dev);
struct mutex *lock = &rv3029->rtc->ops_lock;
+ unsigned int flags, controls;
unsigned long events = 0;
- u8 flags, controls;
int ret;
mutex_lock(lock);
- ret = rv3029_read_regs(dev, RV3029_IRQ_CTRL, &controls, 1);
+ ret = regmap_read(rv3029->regmap, RV3029_IRQ_CTRL, &controls);
if (ret) {
dev_warn(dev, "Read IRQ Control Register error %d\n", ret);
mutex_unlock(lock);
return IRQ_NONE;
}
- ret = rv3029_read_regs(dev, RV3029_IRQ_FLAGS, &flags, 1);
+ ret = regmap_read(rv3029->regmap, RV3029_IRQ_FLAGS, &flags);
if (ret) {
dev_warn(dev, "Read IRQ Flags Register error %d\n", ret);
mutex_unlock(lock);
if (events) {
rtc_update_irq(rv3029->rtc, 1, events);
- rv3029_write_regs(dev, RV3029_IRQ_FLAGS, &flags, 1);
- rv3029_write_regs(dev, RV3029_IRQ_CTRL, &controls, 1);
+ regmap_write(rv3029->regmap, RV3029_IRQ_FLAGS, flags);
+ regmap_write(rv3029->regmap, RV3029_IRQ_CTRL, controls);
}
mutex_unlock(lock);
static int rv3029_read_time(struct device *dev, struct rtc_time *tm)
{
- u8 buf[1];
+ struct rv3029_data *rv3029 = dev_get_drvdata(dev);
+ unsigned int sr;
int ret;
u8 regs[RV3029_WATCH_SECTION_LEN] = { 0, };
- ret = rv3029_get_sr(dev, buf);
- if (ret < 0) {
- dev_err(dev, "%s: reading SR failed\n", __func__);
- return -EIO;
- }
+ ret = regmap_read(rv3029->regmap, RV3029_STATUS, &sr);
+ if (ret < 0)
+ return ret;
+
+ if (sr & (RV3029_STATUS_VLOW2 | RV3029_STATUS_PON))
+ return -EINVAL;
- ret = rv3029_read_regs(dev, RV3029_W_SEC, regs,
+ ret = regmap_bulk_read(rv3029->regmap, RV3029_W_SEC, regs,
RV3029_WATCH_SECTION_LEN);
- if (ret < 0) {
- dev_err(dev, "%s: reading RTC section failed\n", __func__);
+ if (ret < 0)
return ret;
- }
tm->tm_sec = bcd2bin(regs[RV3029_W_SEC - RV3029_W_SEC]);
tm->tm_min = bcd2bin(regs[RV3029_W_MINUTES - RV3029_W_SEC]);
static int rv3029_read_alarm(struct device *dev, struct rtc_wkalrm *alarm)
{
+ struct rv3029_data *rv3029 = dev_get_drvdata(dev);
struct rtc_time *const tm = &alarm->time;
+ unsigned int controls, flags;
int ret;
- u8 regs[8], controls, flags;
-
- ret = rv3029_get_sr(dev, regs);
- if (ret < 0) {
- dev_err(dev, "%s: reading SR failed\n", __func__);
- return -EIO;
- }
+ u8 regs[8];
- ret = rv3029_read_regs(dev, RV3029_A_SC, regs,
+ ret = regmap_bulk_read(rv3029->regmap, RV3029_A_SC, regs,
RV3029_ALARM_SECTION_LEN);
-
- if (ret < 0) {
- dev_err(dev, "%s: reading alarm section failed\n", __func__);
+ if (ret < 0)
return ret;
- }
- ret = rv3029_read_regs(dev, RV3029_IRQ_CTRL, &controls, 1);
- if (ret) {
- dev_err(dev, "Read IRQ Control Register error %d\n", ret);
+ ret = regmap_read(rv3029->regmap, RV3029_IRQ_CTRL, &controls);
+ if (ret)
return ret;
- }
- ret = rv3029_read_regs(dev, RV3029_IRQ_FLAGS, &flags, 1);
- if (ret < 0) {
- dev_err(dev, "Read IRQ Flags Register error %d\n", ret);
+
+ ret = regmap_read(rv3029->regmap, RV3029_IRQ_FLAGS, &flags);
+ if (ret < 0)
return ret;
- }
tm->tm_sec = bcd2bin(regs[RV3029_A_SC - RV3029_A_SC] & 0x7f);
tm->tm_min = bcd2bin(regs[RV3029_A_MN - RV3029_A_SC] & 0x7f);
static int rv3029_alarm_irq_enable(struct device *dev, unsigned int enable)
{
- int ret;
- u8 controls;
-
- ret = rv3029_read_regs(dev, RV3029_IRQ_CTRL, &controls, 1);
- if (ret < 0) {
- dev_warn(dev, "Read IRQ Control Register error %d\n", ret);
- return ret;
- }
-
- /* enable/disable AIE irq */
- if (enable)
- controls |= RV3029_IRQ_CTRL_AIE;
- else
- controls &= ~RV3029_IRQ_CTRL_AIE;
-
- ret = rv3029_write_regs(dev, RV3029_IRQ_CTRL, &controls, 1);
- if (ret < 0) {
- dev_err(dev, "can't update INT reg\n");
- return ret;
- }
+ struct rv3029_data *rv3029 = dev_get_drvdata(dev);
- return 0;
+ return regmap_update_bits(rv3029->regmap, RV3029_IRQ_CTRL,
+ RV3029_IRQ_CTRL_AIE,
+ enable ? RV3029_IRQ_CTRL_AIE : 0);
}
static int rv3029_set_alarm(struct device *dev, struct rtc_wkalrm *alarm)
{
+ struct rv3029_data *rv3029 = dev_get_drvdata(dev);
struct rtc_time *const tm = &alarm->time;
int ret;
u8 regs[8];
- /*
- * The clock has an 8 bit wide bcd-coded register (they never learn)
- * for the year. tm_year is an offset from 1900 and we are interested
- * in the 2000-2099 range, so any value less than 100 is invalid.
- */
- if (tm->tm_year < 100)
- return -EINVAL;
-
- ret = rv3029_get_sr(dev, regs);
- if (ret < 0) {
- dev_err(dev, "%s: reading SR failed\n", __func__);
- return -EIO;
- }
-
/* Activate all the alarms with AE_x bit */
regs[RV3029_A_SC - RV3029_A_SC] = bin2bcd(tm->tm_sec) | RV3029_A_AE_X;
regs[RV3029_A_MN - RV3029_A_SC] = bin2bcd(tm->tm_min) | RV3029_A_AE_X;
| RV3029_A_AE_X;
/* Write the alarm */
- ret = rv3029_write_regs(dev, RV3029_A_SC, regs,
+ ret = regmap_bulk_write(rv3029->regmap, RV3029_A_SC, regs,
RV3029_ALARM_SECTION_LEN);
if (ret < 0)
return ret;
- if (alarm->enabled) {
- /* enable AIE irq */
- ret = rv3029_alarm_irq_enable(dev, 1);
- if (ret)
- return ret;
- } else {
- /* disable AIE irq */
- ret = rv3029_alarm_irq_enable(dev, 0);
- if (ret)
- return ret;
- }
-
- return 0;
+ return rv3029_alarm_irq_enable(dev, alarm->enabled);
}
static int rv3029_set_time(struct device *dev, struct rtc_time *tm)
{
+ struct rv3029_data *rv3029 = dev_get_drvdata(dev);
u8 regs[8];
int ret;
- /*
- * The clock has an 8 bit wide bcd-coded register (they never learn)
- * for the year. tm_year is an offset from 1900 and we are interested
- * in the 2000-2099 range, so any value less than 100 is invalid.
- */
- if (tm->tm_year < 100)
- return -EINVAL;
-
regs[RV3029_W_SEC - RV3029_W_SEC] = bin2bcd(tm->tm_sec);
regs[RV3029_W_MINUTES - RV3029_W_SEC] = bin2bcd(tm->tm_min);
regs[RV3029_W_HOURS - RV3029_W_SEC] = bin2bcd(tm->tm_hour);
regs[RV3029_W_DAYS - RV3029_W_SEC] = bin2bcd(tm->tm_wday + 1) & 0x7;
regs[RV3029_W_YEARS - RV3029_W_SEC] = bin2bcd(tm->tm_year - 100);
- ret = rv3029_write_regs(dev, RV3029_W_SEC, regs,
+ ret = regmap_bulk_write(rv3029->regmap, RV3029_W_SEC, regs,
RV3029_WATCH_SECTION_LEN);
if (ret < 0)
return ret;
- ret = rv3029_get_sr(dev, regs);
- if (ret < 0) {
- dev_err(dev, "%s: reading SR failed\n", __func__);
- return ret;
- }
- /* clear PON bit */
- ret = rv3029_set_sr(dev, (regs[0] & ~RV3029_STATUS_PON));
- if (ret < 0) {
- dev_err(dev, "%s: reading SR failed\n", __func__);
- return ret;
+ /* clear PON and VLOW2 bits */
+ return regmap_update_bits(rv3029->regmap, RV3029_STATUS,
+ RV3029_STATUS_PON | RV3029_STATUS_VLOW2, 0);
+}
+
+static int rv3029_ioctl(struct device *dev, unsigned int cmd, unsigned long arg)
+{
+ struct rv3029_data *rv3029 = dev_get_drvdata(dev);
+ unsigned long vl = 0;
+ int sr, ret = 0;
+
+ switch (cmd) {
+ case RTC_VL_READ:
+ ret = regmap_read(rv3029->regmap, RV3029_STATUS, &sr);
+ if (ret < 0)
+ return ret;
+
+ if (sr & RV3029_STATUS_VLOW1)
+ vl = RTC_VL_ACCURACY_LOW;
+
+ if (sr & (RV3029_STATUS_VLOW2 | RV3029_STATUS_PON))
+ vl |= RTC_VL_DATA_INVALID;
+
+ return put_user(vl, (unsigned int __user *)arg);
+
+ case RTC_VL_CLR:
+ return regmap_update_bits(rv3029->regmap, RV3029_STATUS,
+ RV3029_STATUS_VLOW1, 0);
+
+ default:
+ return -ENOIOCTLCMD;
}
+}
- return 0;
+static int rv3029_nvram_write(void *priv, unsigned int offset, void *val,
+ size_t bytes)
+{
+ return regmap_bulk_write(priv, RV3029_RAM_PAGE + offset, val, bytes);
+}
+
+static int rv3029_nvram_read(void *priv, unsigned int offset, void *val,
+ size_t bytes)
+{
+ return regmap_bulk_read(priv, RV3029_RAM_PAGE + offset, val, bytes);
}
static const struct rv3029_trickle_tab_elem {
static void rv3029_trickle_config(struct device *dev)
{
+ struct rv3029_data *rv3029 = dev_get_drvdata(dev);
struct device_node *of_node = dev->of_node;
const struct rv3029_trickle_tab_elem *elem;
int i, err;
"Trickle charger enabled at %d ohms resistance.\n",
elem->r);
}
- err = rv3029_eeprom_update_bits(dev, RV3029_CONTROL_E2P_EECTRL,
+ err = rv3029_eeprom_update_bits(rv3029, RV3029_CONTROL_E2P_EECTRL,
RV3029_TRICKLE_MASK,
trickle_set_bits);
if (err < 0)
#ifdef CONFIG_RTC_DRV_RV3029_HWMON
-static int rv3029_read_temp(struct device *dev, int *temp_mC)
+static int rv3029_read_temp(struct rv3029_data *rv3029, int *temp_mC)
{
+ unsigned int temp;
int ret;
- u8 temp;
- ret = rv3029_read_regs(dev, RV3029_TEMP_PAGE, &temp, 1);
+ ret = regmap_read(rv3029->regmap, RV3029_TEMP_PAGE, &temp);
if (ret < 0)
return ret;
struct device_attribute *attr,
char *buf)
{
+ struct rv3029_data *rv3029 = dev_get_drvdata(dev);
int ret, temp_mC;
- ret = rv3029_read_temp(dev, &temp_mC);
+ ret = rv3029_read_temp(rv3029, &temp_mC);
if (ret < 0)
return ret;
const char *buf,
size_t count)
{
+ struct rv3029_data *rv3029 = dev_get_drvdata(dev);
+ unsigned int th_set_bits = 0;
unsigned long interval_ms;
int ret;
- u8 th_set_bits = 0;
ret = kstrtoul(buf, 10, &interval_ms);
if (ret < 0)
if (interval_ms >= 16000)
th_set_bits |= RV3029_EECTRL_THP;
}
- ret = rv3029_eeprom_update_bits(dev, RV3029_CONTROL_E2P_EECTRL,
+ ret = rv3029_eeprom_update_bits(rv3029, RV3029_CONTROL_E2P_EECTRL,
RV3029_EECTRL_THE | RV3029_EECTRL_THP,
th_set_bits);
if (ret < 0)
struct device_attribute *attr,
char *buf)
{
+ struct rv3029_data *rv3029 = dev_get_drvdata(dev);
int ret, interval_ms;
u8 eectrl;
- ret = rv3029_eeprom_read(dev, RV3029_CONTROL_E2P_EECTRL,
+ ret = rv3029_eeprom_read(rv3029, RV3029_CONTROL_E2P_EECTRL,
&eectrl, 1);
if (ret < 0)
return ret;
static struct rtc_class_ops rv3029_rtc_ops = {
.read_time = rv3029_read_time,
.set_time = rv3029_set_time,
+ .ioctl = rv3029_ioctl,
};
static int rv3029_probe(struct device *dev, struct regmap *regmap, int irq,
const char *name)
{
struct rv3029_data *rv3029;
+ struct nvmem_config nvmem_cfg = {
+ .name = "rv3029_nvram",
+ .word_size = 1,
+ .stride = 1,
+ .size = RV3029_RAM_SECTION_LEN,
+ .type = NVMEM_TYPE_BATTERY_BACKED,
+ .reg_read = rv3029_nvram_read,
+ .reg_write = rv3029_nvram_write,
+ };
int rc = 0;
- u8 buf[1];
rv3029 = devm_kzalloc(dev, sizeof(*rv3029), GFP_KERNEL);
if (!rv3029)
rv3029->dev = dev;
dev_set_drvdata(dev, rv3029);
- rc = rv3029_get_sr(dev, buf);
- if (rc < 0) {
- dev_err(dev, "reading status failed\n");
- return rc;
- }
-
rv3029_trickle_config(dev);
rv3029_hwmon_register(dev, name);
- rv3029->rtc = devm_rtc_device_register(dev, name, &rv3029_rtc_ops,
- THIS_MODULE);
- if (IS_ERR(rv3029->rtc)) {
- dev_err(dev, "unable to register the class device\n");
+ rv3029->rtc = devm_rtc_allocate_device(dev);
+ if (IS_ERR(rv3029->rtc))
return PTR_ERR(rv3029->rtc);
- }
if (rv3029->irq > 0) {
rc = devm_request_threaded_irq(dev, rv3029->irq,
}
}
+ rv3029->rtc->ops = &rv3029_rtc_ops;
+ rv3029->rtc->range_min = RTC_TIMESTAMP_BEGIN_2000;
+ rv3029->rtc->range_max = RTC_TIMESTAMP_END_2079;
+
+ rc = rtc_register_device(rv3029->rtc);
+ if (rc)
+ return rc;
+
+ nvmem_cfg.priv = rv3029->regmap;
+ rtc_nvmem_register(rv3029->rtc, &nvmem_cfg);
+
return 0;
}
+static const struct regmap_range rv3029_holes_range[] = {
+ regmap_reg_range(0x05, 0x07),
+ regmap_reg_range(0x0f, 0x0f),
+ regmap_reg_range(0x17, 0x17),
+ regmap_reg_range(0x1a, 0x1f),
+ regmap_reg_range(0x21, 0x27),
+ regmap_reg_range(0x34, 0x37),
+};
+
+static const struct regmap_access_table rv3029_regs = {
+ .no_ranges = rv3029_holes_range,
+ .n_no_ranges = ARRAY_SIZE(rv3029_holes_range),
+};
+
+static const struct regmap_config config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .rd_table = &rv3029_regs,
+ .wr_table = &rv3029_regs,
+ .max_register = 0x3f,
+};
+
#if IS_ENABLED(CONFIG_I2C)
static int rv3029_i2c_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct regmap *regmap;
- static const struct regmap_config config = {
- .reg_bits = 8,
- .val_bits = 8,
- };
-
if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_I2C_BLOCK |
I2C_FUNC_SMBUS_BYTE)) {
dev_err(&client->dev, "Adapter does not support SMBUS_I2C_BLOCK or SMBUS_I2C_BYTE\n");
}
regmap = devm_regmap_init_i2c(client, &config);
- if (IS_ERR(regmap)) {
- dev_err(&client->dev, "%s: regmap allocation failed: %ld\n",
- __func__, PTR_ERR(regmap));
+ if (IS_ERR(regmap))
return PTR_ERR(regmap);
- }
return rv3029_probe(&client->dev, regmap, client->irq, client->name);
}
static const struct of_device_id rv3029_of_match[] = {
{ .compatible = "microcrystal,rv3029" },
- /* Backward compatibility only, do not use compatibles below: */
- { .compatible = "rv3029" },
- { .compatible = "rv3029c2" },
- { .compatible = "mc,rv3029c2" },
{ }
};
MODULE_DEVICE_TABLE(of, rv3029_of_match);
static struct i2c_driver rv3029_driver = {
.driver = {
- .name = "rtc-rv3029c2",
+ .name = "rv3029",
.of_match_table = of_match_ptr(rv3029_of_match),
},
.probe = rv3029_i2c_probe,
.id_table = rv3029_id,
};
-static int rv3029_register_driver(void)
+static int __init rv3029_register_driver(void)
{
return i2c_add_driver(&rv3029_driver);
}
#else
-static int rv3029_register_driver(void)
+static int __init rv3029_register_driver(void)
{
return 0;
}
static int rv3049_probe(struct spi_device *spi)
{
- static const struct regmap_config config = {
- .reg_bits = 8,
- .val_bits = 8,
- };
struct regmap *regmap;
regmap = devm_regmap_init_spi(spi, &config);
- if (IS_ERR(regmap)) {
- dev_err(&spi->dev, "%s: regmap allocation failed: %ld\n",
- __func__, PTR_ERR(regmap));
+ if (IS_ERR(regmap))
return PTR_ERR(regmap);
- }
return rv3029_probe(&spi->dev, regmap, spi->irq, "rv3049");
}
.probe = rv3049_probe,
};
-static int rv3049_register_driver(void)
+static int __init rv3049_register_driver(void)
{
return spi_register_driver(&rv3049_driver);
}
-static void rv3049_unregister_driver(void)
+static void __exit rv3049_unregister_driver(void)
{
spi_unregister_driver(&rv3049_driver);
}
#else
-static int rv3049_register_driver(void)
+static int __init rv3049_register_driver(void)
{
return 0;
}
-static void rv3049_unregister_driver(void)
+static void __exit rv3049_unregister_driver(void)
{
}
int ret;
ret = rv3029_register_driver();
- if (ret) {
- pr_err("Failed to register rv3029 driver: %d\n", ret);
+ if (ret)
return ret;
- }
ret = rv3049_register_driver();
- if (ret) {
- pr_err("Failed to register rv3049 driver: %d\n", ret);
+ if (ret)
rv3029_unregister_driver();
- }
return ret;
}
{
struct i2c_client *client = to_i2c_client(dev);
struct rv8803_data *rv8803 = dev_get_drvdata(dev);
+ unsigned int vl = 0;
int flags, ret = 0;
switch (cmd) {
if (flags < 0)
return flags;
- if (flags & RV8803_FLAG_V1F)
+ if (flags & RV8803_FLAG_V1F) {
dev_warn(&client->dev, "Voltage low, temperature compensation stopped.\n");
+ vl = RTC_VL_ACCURACY_LOW;
+ }
if (flags & RV8803_FLAG_V2F)
- dev_warn(&client->dev, "Voltage low, data loss detected.\n");
-
- flags &= RV8803_FLAG_V1F | RV8803_FLAG_V2F;
+ vl |= RTC_VL_DATA_INVALID;
- if (copy_to_user((void __user *)arg, &flags, sizeof(int)))
- return -EFAULT;
-
- return 0;
+ return put_user(vl, (unsigned int __user *)arg);
case RTC_VL_CLR:
mutex_lock(&rv8803->flags_lock);
return flags;
}
- flags &= ~(RV8803_FLAG_V1F | RV8803_FLAG_V2F);
+ flags &= ~RV8803_FLAG_V1F;
ret = rv8803_write_reg(client, RV8803_FLAG, flags);
mutex_unlock(&rv8803->flags_lock);
if (ret)
static int rx8010_ioctl(struct device *dev, unsigned int cmd, unsigned long arg)
{
- struct i2c_client *client = to_i2c_client(dev);
struct rx8010_data *rx8010 = dev_get_drvdata(dev);
- int ret, tmp;
+ int tmp;
int flagreg;
switch (cmd) {
if (flagreg < 0)
return flagreg;
- tmp = !!(flagreg & RX8010_FLAG_VLF);
- if (copy_to_user((void __user *)arg, &tmp, sizeof(int)))
- return -EFAULT;
-
- return 0;
-
- case RTC_VL_CLR:
- flagreg = i2c_smbus_read_byte_data(rx8010->client, RX8010_FLAG);
- if (flagreg < 0) {
- return flagreg;
- }
-
- flagreg &= ~RX8010_FLAG_VLF;
- ret = i2c_smbus_write_byte_data(client, RX8010_FLAG, flagreg);
- if (ret < 0)
- return ret;
-
- return 0;
+ tmp = flagreg & RX8010_FLAG_VLF ? RTC_VL_DATA_INVALID : 0;
+ return put_user(tmp, (unsigned int __user *)arg);
default:
return -ENOIOCTLCMD;
rx8010->rtc->max_user_freq = 1;
- return err;
+ return 0;
}
static struct i2c_driver rx8010_driver = {
MODULE_DEVICE_TABLE(i2c, rx8025_id);
struct rx8025_data {
- struct i2c_client *client;
struct rtc_device *rtc;
u8 ctrl1;
};
static int rx8025_check_validity(struct device *dev)
{
- struct rx8025_data *rx8025 = dev_get_drvdata(dev);
+ struct i2c_client *client = to_i2c_client(dev);
int ctrl2;
- ctrl2 = rx8025_read_reg(rx8025->client, RX8025_REG_CTRL2);
+ ctrl2 = rx8025_read_reg(client, RX8025_REG_CTRL2);
if (ctrl2 < 0)
return ctrl2;
static int rx8025_get_time(struct device *dev, struct rtc_time *dt)
{
+ struct i2c_client *client = to_i2c_client(dev);
struct rx8025_data *rx8025 = dev_get_drvdata(dev);
u8 date[7];
int err;
if (err)
return err;
- err = rx8025_read_regs(rx8025->client, RX8025_REG_SEC, 7, date);
+ err = rx8025_read_regs(client, RX8025_REG_SEC, 7, date);
if (err)
return err;
static int rx8025_set_time(struct device *dev, struct rtc_time *dt)
{
+ struct i2c_client *client = to_i2c_client(dev);
struct rx8025_data *rx8025 = dev_get_drvdata(dev);
u8 date[7];
int ret;
dev_dbg(dev, "%s: write %7ph\n", __func__, date);
- ret = rx8025_write_regs(rx8025->client, RX8025_REG_SEC, 7, date);
+ ret = rx8025_write_regs(client, RX8025_REG_SEC, 7, date);
if (ret < 0)
return ret;
- return rx8025_reset_validity(rx8025->client);
+ return rx8025_reset_validity(client);
}
static int rx8025_init_client(struct i2c_client *client)
int need_clear = 0;
int err;
- err = rx8025_read_regs(rx8025->client, RX8025_REG_CTRL1, 2, ctrl);
+ err = rx8025_read_regs(client, RX8025_REG_CTRL1, 2, ctrl);
if (err)
goto out;
/* Alarm support */
static int rx8025_read_alarm(struct device *dev, struct rtc_wkalrm *t)
{
+ struct i2c_client *client = to_i2c_client(dev);
struct rx8025_data *rx8025 = dev_get_drvdata(dev);
- struct i2c_client *client = rx8025->client;
u8 ald[2];
int ctrl2, err;
if (rx8025->ctrl1 & RX8025_BIT_CTRL1_DALE) {
rx8025->ctrl1 &= ~RX8025_BIT_CTRL1_DALE;
- err = rx8025_write_reg(rx8025->client, RX8025_REG_CTRL1,
+ err = rx8025_write_reg(client, RX8025_REG_CTRL1,
rx8025->ctrl1);
if (err)
return err;
}
- err = rx8025_write_regs(rx8025->client, RX8025_REG_ALDMIN, 2, ald);
+ err = rx8025_write_regs(client, RX8025_REG_ALDMIN, 2, ald);
if (err)
return err;
if (t->enabled) {
rx8025->ctrl1 |= RX8025_BIT_CTRL1_DALE;
- err = rx8025_write_reg(rx8025->client, RX8025_REG_CTRL1,
+ err = rx8025_write_reg(client, RX8025_REG_CTRL1,
rx8025->ctrl1);
if (err)
return err;
static int rx8025_alarm_irq_enable(struct device *dev, unsigned int enabled)
{
+ struct i2c_client *client = to_i2c_client(dev);
struct rx8025_data *rx8025 = dev_get_drvdata(dev);
u8 ctrl1;
int err;
if (ctrl1 != rx8025->ctrl1) {
rx8025->ctrl1 = ctrl1;
- err = rx8025_write_reg(rx8025->client, RX8025_REG_CTRL1,
+ err = rx8025_write_reg(client, RX8025_REG_CTRL1,
rx8025->ctrl1);
if (err)
return err;
if (!rx8025)
return -ENOMEM;
- rx8025->client = client;
i2c_set_clientdata(client, rx8025);
err = rx8025_init_client(client);
}
ret = stm32_rtc_wait_sync(rtc);
- if (ret < 0)
+ if (ret < 0) {
+ if (rtc->data->has_pclk)
+ clk_disable_unprepare(rtc->pclk);
return ret;
+ }
if (device_may_wakeup(dev))
return disable_irq_wake(rtc->irq_alarm);
#include <linux/device.h>
#include <linux/err.h>
#include <linux/init.h>
+#include <linux/irq.h>
#include <linux/kernel.h>
#include <linux/mfd/tps6586x.h>
#include <linux/module.h>
rtc->rtc->start_secs = mktime64(2009, 1, 1, 0, 0, 0);
rtc->rtc->set_start_time = true;
+ irq_set_status_flags(rtc->irq, IRQ_NOAUTOEN);
+
ret = devm_request_threaded_irq(&pdev->dev, rtc->irq, NULL,
tps6586x_rtc_irq,
IRQF_ONESHOT,
rtc->irq, ret);
goto fail_rtc_register;
}
- disable_irq(rtc->irq);
ret = rtc_register_device(rtc->rtc);
if (ret)
* RTC has updated the CURRENT_TIME with the time written into
* SET_TIME_WRITE register.
*/
- rtc_time64_to_tm(readl(xrtcdev->reg_base + RTC_CUR_TM), tm);
+ read_time = readl(xrtcdev->reg_base + RTC_CUR_TM);
} else {
/*
* Time written in SET_TIME_WRITE has not yet updated into
* reading.
*/
read_time = readl(xrtcdev->reg_base + RTC_SET_TM_RD) - 1;
- rtc_time64_to_tm(read_time, tm);
}
+ rtc_time64_to_tm(read_time, tm);
return 0;
}
#define RTC_TIMESTAMP_BEGIN_1900 -2208988800LL /* 1900-01-01 00:00:00 */
#define RTC_TIMESTAMP_BEGIN_2000 946684800LL /* 2000-01-01 00:00:00 */
#define RTC_TIMESTAMP_END_2063 2966371199LL /* 2063-12-31 23:59:59 */
+#define RTC_TIMESTAMP_END_2079 3471292799LL /* 2079-12-31 23:59:59 */
#define RTC_TIMESTAMP_END_2099 4102444799LL /* 2099-12-31 23:59:59 */
#define RTC_TIMESTAMP_END_2199 7258118399LL /* 2199-12-31 23:59:59 */
#define RTC_TIMESTAMP_END_9999 253402300799LL /* 9999-12-31 23:59:59 */
#define RTC_PLL_GET _IOR('p', 0x11, struct rtc_pll_info) /* Get PLL correction */
#define RTC_PLL_SET _IOW('p', 0x12, struct rtc_pll_info) /* Set PLL correction */
-#define RTC_VL_READ _IOR('p', 0x13, int) /* Voltage low detector */
+#define RTC_VL_DATA_INVALID BIT(0) /* Voltage too low, RTC data is invalid */
+#define RTC_VL_BACKUP_LOW BIT(1) /* Backup voltage is low */
+#define RTC_VL_BACKUP_EMPTY BIT(2) /* Backup empty or not present */
+#define RTC_VL_ACCURACY_LOW BIT(3) /* Voltage is low, RTC accuracy is reduced */
+
+#define RTC_VL_READ _IOR('p', 0x13, unsigned int) /* Voltage low detection */
#define RTC_VL_CLR _IO('p', 0x14) /* Clear voltage low information */
/* interrupt flags */
projects / linux-2.6-microblaze.git / commitdiff