#include <linux/property.h>
#include <linux/slab.h>
#include <linux/of.h>
-#include <linux/platform_data/leds-pca963x.h>
/* LED select registers determine the source that drives LED outputs */
#define PCA963X_LED_OFF 0x0 /* LED driver off */
};
MODULE_DEVICE_TABLE(i2c, pca963x_id);
-struct pca963x_led;
-
-struct pca963x {
- struct pca963x_chipdef *chipdef;
- struct mutex mutex;
- struct i2c_client *client;
- struct pca963x_led *leds;
- unsigned long leds_on;
-};
+struct pca963x;
struct pca963x_led {
struct pca963x *chip;
struct led_classdev led_cdev;
int led_num; /* 0 .. 15 potentially */
- char name[32];
u8 gdc;
u8 gfrq;
};
-static int pca963x_brightness(struct pca963x_led *pca963x,
- enum led_brightness brightness)
+struct pca963x {
+ struct pca963x_chipdef *chipdef;
+ struct mutex mutex;
+ struct i2c_client *client;
+ unsigned long leds_on;
+ struct pca963x_led leds[];
+};
+
+static int pca963x_brightness(struct pca963x_led *led,
+ enum led_brightness brightness)
{
- u8 ledout_addr = pca963x->chip->chipdef->ledout_base
- + (pca963x->led_num / 4);
- u8 ledout;
- int shift = 2 * (pca963x->led_num % 4);
- u8 mask = 0x3 << shift;
+ struct i2c_client *client = led->chip->client;
+ struct pca963x_chipdef *chipdef = led->chip->chipdef;
+ u8 ledout_addr, ledout, mask, val;
+ int shift;
int ret;
- ledout = i2c_smbus_read_byte_data(pca963x->chip->client, ledout_addr);
+ ledout_addr = chipdef->ledout_base + (led->led_num / 4);
+ shift = 2 * (led->led_num % 4);
+ mask = 0x3 << shift;
+ ledout = i2c_smbus_read_byte_data(client, ledout_addr);
+
switch (brightness) {
case LED_FULL:
- ret = i2c_smbus_write_byte_data(pca963x->chip->client,
- ledout_addr,
- (ledout & ~mask) | (PCA963X_LED_ON << shift));
+ val = (ledout & ~mask) | (PCA963X_LED_ON << shift);
+ ret = i2c_smbus_write_byte_data(client, ledout_addr, val);
break;
case LED_OFF:
- ret = i2c_smbus_write_byte_data(pca963x->chip->client,
- ledout_addr, ledout & ~mask);
+ val = ledout & ~mask;
+ ret = i2c_smbus_write_byte_data(client, ledout_addr, val);
break;
default:
- ret = i2c_smbus_write_byte_data(pca963x->chip->client,
- PCA963X_PWM_BASE + pca963x->led_num,
- brightness);
+ ret = i2c_smbus_write_byte_data(client,
+ PCA963X_PWM_BASE +
+ led->led_num,
+ brightness);
if (ret < 0)
return ret;
- ret = i2c_smbus_write_byte_data(pca963x->chip->client,
- ledout_addr,
- (ledout & ~mask) | (PCA963X_LED_PWM << shift));
+
+ val = (ledout & ~mask) | (PCA963X_LED_PWM << shift);
+ ret = i2c_smbus_write_byte_data(client, ledout_addr, val);
break;
}
return ret;
}
-static void pca963x_blink(struct pca963x_led *pca963x)
+static void pca963x_blink(struct pca963x_led *led)
{
- u8 ledout_addr = pca963x->chip->chipdef->ledout_base +
- (pca963x->led_num / 4);
- u8 ledout;
- u8 mode2 = i2c_smbus_read_byte_data(pca963x->chip->client,
- PCA963X_MODE2);
- int shift = 2 * (pca963x->led_num % 4);
- u8 mask = 0x3 << shift;
+ struct i2c_client *client = led->chip->client;
+ struct pca963x_chipdef *chipdef = led->chip->chipdef;
+ u8 ledout_addr, ledout, mask, val, mode2;
+ int shift;
+
+ ledout_addr = chipdef->ledout_base + (led->led_num / 4);
+ shift = 2 * (led->led_num % 4);
+ mask = 0x3 << shift;
+ mode2 = i2c_smbus_read_byte_data(client, PCA963X_MODE2);
- i2c_smbus_write_byte_data(pca963x->chip->client,
- pca963x->chip->chipdef->grppwm, pca963x->gdc);
+ i2c_smbus_write_byte_data(client, chipdef->grppwm, led->gdc);
- i2c_smbus_write_byte_data(pca963x->chip->client,
- pca963x->chip->chipdef->grpfreq, pca963x->gfrq);
+ i2c_smbus_write_byte_data(client, chipdef->grpfreq, led->gfrq);
if (!(mode2 & PCA963X_MODE2_DMBLNK))
- i2c_smbus_write_byte_data(pca963x->chip->client, PCA963X_MODE2,
- mode2 | PCA963X_MODE2_DMBLNK);
-
- mutex_lock(&pca963x->chip->mutex);
- ledout = i2c_smbus_read_byte_data(pca963x->chip->client, ledout_addr);
- if ((ledout & mask) != (PCA963X_LED_GRP_PWM << shift))
- i2c_smbus_write_byte_data(pca963x->chip->client, ledout_addr,
- (ledout & ~mask) | (PCA963X_LED_GRP_PWM << shift));
- mutex_unlock(&pca963x->chip->mutex);
+ i2c_smbus_write_byte_data(client, PCA963X_MODE2,
+ mode2 | PCA963X_MODE2_DMBLNK);
+
+ mutex_lock(&led->chip->mutex);
+
+ ledout = i2c_smbus_read_byte_data(client, ledout_addr);
+ if ((ledout & mask) != (PCA963X_LED_GRP_PWM << shift)) {
+ val = (ledout & ~mask) | (PCA963X_LED_GRP_PWM << shift);
+ i2c_smbus_write_byte_data(client, ledout_addr, val);
+ }
+
+ mutex_unlock(&led->chip->mutex);
}
-static int pca963x_power_state(struct pca963x_led *pca963x)
+static int pca963x_power_state(struct pca963x_led *led)
{
- unsigned long *leds_on = &pca963x->chip->leds_on;
- unsigned long cached_leds = pca963x->chip->leds_on;
+ struct i2c_client *client = led->chip->client;
+ unsigned long *leds_on = &led->chip->leds_on;
+ unsigned long cached_leds = *leds_on;
- if (pca963x->led_cdev.brightness)
- set_bit(pca963x->led_num, leds_on);
+ if (led->led_cdev.brightness)
+ set_bit(led->led_num, leds_on);
else
- clear_bit(pca963x->led_num, leds_on);
+ clear_bit(led->led_num, leds_on);
if (!(*leds_on) != !cached_leds)
- return i2c_smbus_write_byte_data(pca963x->chip->client,
- PCA963X_MODE1, *leds_on ? 0 : BIT(4));
+ return i2c_smbus_write_byte_data(client, PCA963X_MODE1,
+ *leds_on ? 0 : BIT(4));
return 0;
}
static int pca963x_led_set(struct led_classdev *led_cdev,
- enum led_brightness value)
+ enum led_brightness value)
{
- struct pca963x_led *pca963x;
+ struct pca963x_led *led;
int ret;
- pca963x = container_of(led_cdev, struct pca963x_led, led_cdev);
+ led = container_of(led_cdev, struct pca963x_led, led_cdev);
- mutex_lock(&pca963x->chip->mutex);
+ mutex_lock(&led->chip->mutex);
- ret = pca963x_brightness(pca963x, value);
+ ret = pca963x_brightness(led, value);
if (ret < 0)
goto unlock;
- ret = pca963x_power_state(pca963x);
+ ret = pca963x_power_state(led);
unlock:
- mutex_unlock(&pca963x->chip->mutex);
+ mutex_unlock(&led->chip->mutex);
return ret;
}
-static unsigned int pca963x_period_scale(struct pca963x_led *pca963x,
- unsigned int val)
+static unsigned int pca963x_period_scale(struct pca963x_led *led,
+ unsigned int val)
{
- unsigned int scaling = pca963x->chip->chipdef->scaling;
+ unsigned int scaling = led->chip->chipdef->scaling;
return scaling ? DIV_ROUND_CLOSEST(val * scaling, 1000) : val;
}
static int pca963x_blink_set(struct led_classdev *led_cdev,
- unsigned long *delay_on, unsigned long *delay_off)
+ unsigned long *delay_on, unsigned long *delay_off)
{
- struct pca963x_led *pca963x;
unsigned long time_on, time_off, period;
+ struct pca963x_led *led;
u8 gdc, gfrq;
- pca963x = container_of(led_cdev, struct pca963x_led, led_cdev);
+ led = container_of(led_cdev, struct pca963x_led, led_cdev);
time_on = *delay_on;
time_off = *delay_off;
time_off = 500;
}
- period = pca963x_period_scale(pca963x, time_on + time_off);
+ period = pca963x_period_scale(led, time_on + time_off);
/* If period not supported by hardware, default to someting sane. */
if ((period < PCA963X_BLINK_PERIOD_MIN) ||
(period > PCA963X_BLINK_PERIOD_MAX)) {
time_on = 500;
time_off = 500;
- period = pca963x_period_scale(pca963x, 1000);
+ period = pca963x_period_scale(led, 1000);
}
/*
* (time_on / period) = (GDC / 256) ->
* GDC = ((time_on * 256) / period)
*/
- gdc = (pca963x_period_scale(pca963x, time_on) * 256) / period;
+ gdc = (pca963x_period_scale(led, time_on) * 256) / period;
/*
* From manual: period = ((GFRQ + 1) / 24) in seconds.
*/
gfrq = (period * 24 / 1000) - 1;
- pca963x->gdc = gdc;
- pca963x->gfrq = gfrq;
+ led->gdc = gdc;
+ led->gfrq = gfrq;
- pca963x_blink(pca963x);
+ pca963x_blink(led);
*delay_on = time_on;
*delay_off = time_off;
return 0;
}
-static struct pca963x_platform_data *
-pca963x_get_pdata(struct i2c_client *client, struct pca963x_chipdef *chip)
+static int pca963x_register_leds(struct i2c_client *client,
+ struct pca963x *chip)
{
- struct pca963x_platform_data *pdata;
- struct led_info *pca963x_leds;
+ struct pca963x_chipdef *chipdef = chip->chipdef;
+ struct pca963x_led *led = chip->leds;
+ struct device *dev = &client->dev;
struct fwnode_handle *child;
- int count;
-
- count = device_get_child_node_count(&client->dev);
- if (!count || count > chip->n_leds)
- return ERR_PTR(-ENODEV);
-
- pca963x_leds = devm_kcalloc(&client->dev,
- chip->n_leds, sizeof(struct led_info), GFP_KERNEL);
- if (!pca963x_leds)
- return ERR_PTR(-ENOMEM);
-
- device_for_each_child_node(&client->dev, child) {
- struct led_info led = {};
- u32 reg;
- int res;
-
- res = fwnode_property_read_u32(child, "reg", ®);
- if ((res != 0) || (reg >= chip->n_leds))
- continue;
+ bool hw_blink;
+ s32 mode2;
+ u32 reg;
+ int ret;
- res = fwnode_property_read_string(child, "label", &led.name);
- if ((res != 0) && is_of_node(child))
- led.name = to_of_node(child)->name;
+ if (device_property_read_u32(dev, "nxp,period-scale",
+ &chipdef->scaling))
+ chipdef->scaling = 1000;
- fwnode_property_read_string(child, "linux,default-trigger",
- &led.default_trigger);
+ hw_blink = device_property_read_bool(dev, "nxp,hw-blink");
- pca963x_leds[reg] = led;
- }
- pdata = devm_kzalloc(&client->dev,
- sizeof(struct pca963x_platform_data), GFP_KERNEL);
- if (!pdata)
- return ERR_PTR(-ENOMEM);
-
- pdata->leds.leds = pca963x_leds;
- pdata->leds.num_leds = chip->n_leds;
+ mode2 = i2c_smbus_read_byte_data(client, PCA963X_MODE2);
+ if (mode2 < 0)
+ return mode2;
/* default to open-drain unless totem pole (push-pull) is specified */
- if (device_property_read_bool(&client->dev, "nxp,totem-pole"))
- pdata->outdrv = PCA963X_TOTEM_POLE;
+ if (device_property_read_bool(dev, "nxp,totem-pole"))
+ mode2 |= PCA963X_MODE2_OUTDRV;
else
- pdata->outdrv = PCA963X_OPEN_DRAIN;
+ mode2 &= ~PCA963X_MODE2_OUTDRV;
- /* default to software blinking unless hardware blinking is specified */
- if (device_property_read_bool(&client->dev, "nxp,hw-blink"))
- pdata->blink_type = PCA963X_HW_BLINK;
+ /* default to non-inverted output, unless inverted is specified */
+ if (device_property_read_bool(dev, "nxp,inverted-out"))
+ mode2 |= PCA963X_MODE2_INVRT;
else
- pdata->blink_type = PCA963X_SW_BLINK;
+ mode2 &= ~PCA963X_MODE2_INVRT;
+
+ ret = i2c_smbus_write_byte_data(client, PCA963X_MODE2, mode2);
+ if (ret < 0)
+ return ret;
+
+ device_for_each_child_node(dev, child) {
+ struct led_init_data init_data = {};
+ char default_label[32];
+
+ ret = fwnode_property_read_u32(child, "reg", ®);
+ if (ret || reg >= chipdef->n_leds) {
+ dev_err(dev, "Invalid 'reg' property for node %pfw\n",
+ child);
+ ret = -EINVAL;
+ goto err;
+ }
- if (device_property_read_u32(&client->dev, "nxp,period-scale",
- &chip->scaling))
- chip->scaling = 1000;
+ led->led_num = reg;
+ led->chip = chip;
+ led->led_cdev.brightness_set_blocking = pca963x_led_set;
+ if (hw_blink)
+ led->led_cdev.blink_set = pca963x_blink_set;
+
+ init_data.fwnode = child;
+ /* for backwards compatibility */
+ init_data.devicename = "pca963x";
+ snprintf(default_label, sizeof(default_label), "%d:%.2x:%u",
+ client->adapter->nr, client->addr, reg);
+ init_data.default_label = default_label;
+
+ ret = devm_led_classdev_register_ext(dev, &led->led_cdev,
+ &init_data);
+ if (ret) {
+ dev_err(dev, "Failed to register LED for node %pfw\n",
+ child);
+ goto err;
+ }
- /* default to non-inverted output, unless inverted is specified */
- if (device_property_read_bool(&client->dev, "nxp,inverted-out"))
- pdata->dir = PCA963X_INVERTED;
- else
- pdata->dir = PCA963X_NORMAL;
+ ++led;
+ }
- return pdata;
+ return 0;
+err:
+ fwnode_handle_put(child);
+ return ret;
}
static const struct of_device_id of_pca963x_match[] = {
MODULE_DEVICE_TABLE(of, of_pca963x_match);
static int pca963x_probe(struct i2c_client *client,
- const struct i2c_device_id *id)
+ const struct i2c_device_id *id)
{
- struct pca963x *pca963x_chip;
- struct pca963x_led *pca963x;
- struct pca963x_platform_data *pdata;
- struct pca963x_chipdef *chip;
- int i, err;
-
- chip = &pca963x_chipdefs[id->driver_data];
- pdata = dev_get_platdata(&client->dev);
-
- if (!pdata) {
- pdata = pca963x_get_pdata(client, chip);
- if (IS_ERR(pdata)) {
- dev_warn(&client->dev, "could not parse configuration\n");
- pdata = NULL;
- }
- }
+ struct device *dev = &client->dev;
+ struct pca963x_chipdef *chipdef;
+ struct pca963x *chip;
+ int i, count;
- if (pdata && (pdata->leds.num_leds < 1 ||
- pdata->leds.num_leds > chip->n_leds)) {
- dev_err(&client->dev, "board info must claim 1-%d LEDs",
- chip->n_leds);
+ chipdef = &pca963x_chipdefs[id->driver_data];
+
+ count = device_get_child_node_count(dev);
+ if (!count || count > chipdef->n_leds) {
+ dev_err(dev, "Node %pfw must define between 1 and %d LEDs\n",
+ dev_fwnode(dev), chipdef->n_leds);
return -EINVAL;
}
- pca963x_chip = devm_kzalloc(&client->dev, sizeof(*pca963x_chip),
- GFP_KERNEL);
- if (!pca963x_chip)
- return -ENOMEM;
- pca963x = devm_kcalloc(&client->dev, chip->n_leds, sizeof(*pca963x),
- GFP_KERNEL);
- if (!pca963x)
+ chip = devm_kzalloc(dev, struct_size(chip, leds, count), GFP_KERNEL);
+ if (!chip)
return -ENOMEM;
- i2c_set_clientdata(client, pca963x_chip);
+ i2c_set_clientdata(client, chip);
- mutex_init(&pca963x_chip->mutex);
- pca963x_chip->chipdef = chip;
- pca963x_chip->client = client;
- pca963x_chip->leds = pca963x;
+ mutex_init(&chip->mutex);
+ chip->chipdef = chipdef;
+ chip->client = client;
/* Turn off LEDs by default*/
- for (i = 0; i < chip->n_leds / 4; i++)
- i2c_smbus_write_byte_data(client, chip->ledout_base + i, 0x00);
-
- for (i = 0; i < chip->n_leds; i++) {
- pca963x[i].led_num = i;
- pca963x[i].chip = pca963x_chip;
-
- /* Platform data can specify LED names and default triggers */
- if (pdata && i < pdata->leds.num_leds) {
- if (pdata->leds.leds[i].name)
- snprintf(pca963x[i].name,
- sizeof(pca963x[i].name), "pca963x:%s",
- pdata->leds.leds[i].name);
- if (pdata->leds.leds[i].default_trigger)
- pca963x[i].led_cdev.default_trigger =
- pdata->leds.leds[i].default_trigger;
- }
- if (!pdata || i >= pdata->leds.num_leds ||
- !pdata->leds.leds[i].name)
- snprintf(pca963x[i].name, sizeof(pca963x[i].name),
- "pca963x:%d:%.2x:%d", client->adapter->nr,
- client->addr, i);
-
- pca963x[i].led_cdev.name = pca963x[i].name;
- pca963x[i].led_cdev.brightness_set_blocking = pca963x_led_set;
-
- if (pdata && pdata->blink_type == PCA963X_HW_BLINK)
- pca963x[i].led_cdev.blink_set = pca963x_blink_set;
-
- err = led_classdev_register(&client->dev, &pca963x[i].led_cdev);
- if (err < 0)
- goto exit;
- }
+ for (i = 0; i < chipdef->n_leds / 4; i++)
+ i2c_smbus_write_byte_data(client, chipdef->ledout_base + i, 0x00);
/* Disable LED all-call address, and power down initially */
i2c_smbus_write_byte_data(client, PCA963X_MODE1, BIT(4));
- if (pdata) {
- u8 mode2 = i2c_smbus_read_byte_data(pca963x->chip->client,
- PCA963X_MODE2);
- /* Configure output: open-drain or totem pole (push-pull) */
- if (pdata->outdrv == PCA963X_OPEN_DRAIN)
- mode2 &= ~PCA963X_MODE2_OUTDRV;
- else
- mode2 |= PCA963X_MODE2_OUTDRV;
- /* Configure direction: normal or inverted */
- if (pdata->dir == PCA963X_INVERTED)
- mode2 |= PCA963X_MODE2_INVRT;
- i2c_smbus_write_byte_data(pca963x->chip->client, PCA963X_MODE2,
- mode2);
- }
-
- return 0;
-
-exit:
- while (i--)
- led_classdev_unregister(&pca963x[i].led_cdev);
-
- return err;
-}
-
-static int pca963x_remove(struct i2c_client *client)
-{
- struct pca963x *pca963x = i2c_get_clientdata(client);
- int i;
-
- for (i = 0; i < pca963x->chipdef->n_leds; i++)
- led_classdev_unregister(&pca963x->leds[i].led_cdev);
-
- return 0;
+ return pca963x_register_leds(client, chip);
}
static struct i2c_driver pca963x_driver = {
.of_match_table = of_pca963x_match,
},
.probe = pca963x_probe,
- .remove = pca963x_remove,
.id_table = pca963x_id,
};
projects / linux-2.6-microblaze.git / blobdiff