i2c: i2c-stm32f4: use generic definition of speed enum

This patch uses a more generic definition of speed enum for i2c-stm32f4
driver.

Signed-off-by: M'boumba Cedric Madianga <cedric.madianga@gmail.com>
Signed-off-by: Pierre-Yves MORDRET <pierre-yves.mordret@st.com>
Reviewed-by: Ludovic BARRE <ludovic.barre@st.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>

diff --git a/drivers/i2c/busses/i2c-stm32.h b/drivers/i2c/busses/i2c-stm32.h
new file mode 100644 (file)
index 0000000..dab5176
--- /dev/null
+++ b/drivers/i2c/busses/i2c-stm32.h
@@ -0,0 +1,20 @@
+/*
+ * i2c-stm32.h
+ *
+ * Copyright (C) M'boumba Cedric Madianga 2017
+ * Author: M'boumba Cedric Madianga <cedric.madianga@gmail.com>
+ *
+ * License terms:  GNU General Public License (GPL), version 2
+ */
+
+#ifndef _I2C_STM32_H
+#define _I2C_STM32_H
+
+enum stm32_i2c_speed {
+       STM32_I2C_SPEED_STANDARD, /* 100 kHz */
+       STM32_I2C_SPEED_FAST, /* 400 kHz */
+       STM32_I2C_SPEED_FAST_PLUS, /* 1 MHz */
+       STM32_I2C_SPEED_END,
+};
+
+#endif /* _I2C_STM32_H */

diff --git a/drivers/i2c/busses/i2c-stm32f4.c b/drivers/i2c/busses/i2c-stm32f4.c
index aceb6f7..4ec1084 100644 (file)
--- a/drivers/i2c/busses/i2c-stm32f4.c
+++ b/drivers/i2c/busses/i2c-stm32f4.c
@@ -27,6 +27,8 @@
 #include <linux/platform_device.h>
 #include <linux/reset.h>
 
+#include "i2c-stm32.h"
+
 /* STM32F4 I2C offset registers */
 #define STM32F4_I2C_CR1                        0x00
 #define STM32F4_I2C_CR2                        0x04
@@ -90,12 +92,6 @@
 #define STM32F4_I2C_MAX_FREQ           46U
 #define HZ_TO_MHZ                      1000000
 
-enum stm32f4_i2c_speed {
-       STM32F4_I2C_SPEED_STANDARD, /* 100 kHz */
-       STM32F4_I2C_SPEED_FAST, /* 400 kHz */
-       STM32F4_I2C_SPEED_END,
-};
-
 /**
  * struct stm32f4_i2c_msg - client specific data
  * @addr: 8-bit slave addr, including r/w bit
@@ -159,7 +155,7 @@ static int stm32f4_i2c_set_periph_clk_freq(struct stm32f4_i2c_dev *i2c_dev)
        i2c_dev->parent_rate = clk_get_rate(i2c_dev->clk);
        freq = DIV_ROUND_UP(i2c_dev->parent_rate, HZ_TO_MHZ);
 
-       if (i2c_dev->speed == STM32F4_I2C_SPEED_STANDARD) {
+       if (i2c_dev->speed == STM32_I2C_SPEED_STANDARD) {
                /*
                 * To reach 100 kHz, the parent clk frequency should be between
                 * a minimum value of 2 MHz and a maximum value of 46 MHz due
@@ -216,7 +212,7 @@ static void stm32f4_i2c_set_rise_time(struct stm32f4_i2c_dev *i2c_dev)
         * is not higher than 46 MHz . As a result trise is at most 4 bits wide
         * and so fits into the TRISE bits [5:0].
         */
-       if (i2c_dev->speed == STM32F4_I2C_SPEED_STANDARD)
+       if (i2c_dev->speed == STM32_I2C_SPEED_STANDARD)
                trise = freq + 1;
        else
                trise = freq * 3 / 10 + 1;
@@ -230,7 +226,7 @@ static void stm32f4_i2c_set_speed_mode(struct stm32f4_i2c_dev *i2c_dev)
        u32 val;
        u32 ccr = 0;
 
-       if (i2c_dev->speed == STM32F4_I2C_SPEED_STANDARD) {
+       if (i2c_dev->speed == STM32_I2C_SPEED_STANDARD) {
                /*
                 * In standard mode:
                 * t_scl_high = t_scl_low = CCR * I2C parent clk period
@@ -808,10 +804,10 @@ static int stm32f4_i2c_probe(struct platform_device *pdev)
        udelay(2);
        reset_control_deassert(rst);
 
-       i2c_dev->speed = STM32F4_I2C_SPEED_STANDARD;
+       i2c_dev->speed = STM32_I2C_SPEED_STANDARD;
        ret = of_property_read_u32(np, "clock-frequency", &clk_rate);
        if (!ret && clk_rate >= 400000)
-               i2c_dev->speed = STM32F4_I2C_SPEED_FAST;
+               i2c_dev->speed = STM32_I2C_SPEED_FAST;
 
        i2c_dev->dev = &pdev->dev;