[PATCH 1/4] MXS: Allow passing i2c bus speed via platform data
Marek Vasut
marex at denx.de
Mon Apr 30 22:00:18 EDT 2012
Pass the I2C speed via platform data. This patch only adds the necessary
facilities for the passing and fixes the board files to work with them.
The subsequent patch for i2c-mxs.c then implements the speed adjustment.
Signed-off-by: Marek Vasut <marex at denx.de>
Cc: Detlev Zundel <dzu at denx.de>
CC: Dong Aisheng <b29396 at freescale.com>
CC: Fabio Estevam <fabio.estevam at freescale.com>
Cc: Linux ARM kernel <linux-arm-kernel at lists.infradead.org>
Cc: linux-i2c at vger.kernel.org
CC: Sascha Hauer <s.hauer at pengutronix.de>
CC: Shawn Guo <shawn.guo at linaro.org>
Cc: Stefano Babic <sbabic at denx.de>
CC: Uwe Kleine-König <u.kleine-koenig at pengutronix.de>
Cc: Wolfgang Denk <wd at denx.de>
Cc: Wolfram Sang <w.sang at pengutronix.de>
---
arch/arm/mach-mxs/devices-mx28.h | 3 ++-
arch/arm/mach-mxs/devices/platform-mxs-i2c.c | 9 ++++++---
arch/arm/mach-mxs/include/mach/devices-common.h | 4 +++-
arch/arm/mach-mxs/mach-apx4devkit.c | 7 ++++++-
arch/arm/mach-mxs/mach-m28evk.c | 8 ++++++--
arch/arm/mach-mxs/mach-mx28evk.c | 7 ++++++-
arch/arm/mach-mxs/mach-tx28.c | 7 ++++++-
include/linux/i2c/mxs-i2c.h | 21 +++++++++++++++++++++
8 files changed, 56 insertions(+), 10 deletions(-)
create mode 100644 include/linux/i2c/mxs-i2c.h
diff --git a/arch/arm/mach-mxs/devices-mx28.h b/arch/arm/mach-mxs/devices-mx28.h
index 9dbeae1..8b3e735 100644
--- a/arch/arm/mach-mxs/devices-mx28.h
+++ b/arch/arm/mach-mxs/devices-mx28.h
@@ -39,7 +39,8 @@ extern const struct mxs_gpmi_nand_data mx28_gpmi_nand_data __initconst;
mxs_add_gpmi_nand(pdata, &mx28_gpmi_nand_data)
extern const struct mxs_mxs_i2c_data mx28_mxs_i2c_data[] __initconst;
-#define mx28_add_mxs_i2c(id) mxs_add_mxs_i2c(&mx28_mxs_i2c_data[id])
+#define mx28_add_mxs_i2c(id, pdata) \
+ mxs_add_mxs_i2c(&mx28_mxs_i2c_data[id], pdata)
extern const struct mxs_mxs_mmc_data mx28_mxs_mmc_data[] __initconst;
#define mx28_add_mxs_mmc(id, pdata) \
diff --git a/arch/arm/mach-mxs/devices/platform-mxs-i2c.c b/arch/arm/mach-mxs/devices/platform-mxs-i2c.c
index 79222ec..bb325b9 100644
--- a/arch/arm/mach-mxs/devices/platform-mxs-i2c.c
+++ b/arch/arm/mach-mxs/devices/platform-mxs-i2c.c
@@ -9,6 +9,7 @@
#include <asm/sizes.h>
#include <mach/mx28.h>
#include <mach/devices-common.h>
+#include <linux/i2c/mxs-i2c.h>
#define mxs_i2c_data_entry_single(soc, _id) \
{ \
@@ -29,7 +30,8 @@ const struct mxs_mxs_i2c_data mx28_mxs_i2c_data[] __initconst = {
#endif
struct platform_device *__init mxs_add_mxs_i2c(
- const struct mxs_mxs_i2c_data *data)
+ const struct mxs_mxs_i2c_data *data,
+ const struct mxs_i2c_platform_data *pdata)
{
struct resource res[] = {
{
@@ -47,6 +49,7 @@ struct platform_device *__init mxs_add_mxs_i2c(
},
};
- return mxs_add_platform_device("mxs-i2c", data->id, res,
- ARRAY_SIZE(res), NULL, 0);
+ return mxs_add_platform_device("mxs-i2c", data->id,
+ res, ARRAY_SIZE(res),
+ pdata, sizeof(*pdata));
}
diff --git a/arch/arm/mach-mxs/include/mach/devices-common.h b/arch/arm/mach-mxs/include/mach/devices-common.h
index f2e3839..7bf2894 100644
--- a/arch/arm/mach-mxs/include/mach/devices-common.h
+++ b/arch/arm/mach-mxs/include/mach/devices-common.h
@@ -77,6 +77,7 @@ mxs_add_gpmi_nand(const struct gpmi_nand_platform_data *pdata,
const struct mxs_gpmi_nand_data *data);
/* i2c */
+#include <linux/i2c/mxs-i2c.h>
struct mxs_mxs_i2c_data {
int id;
resource_size_t iobase;
@@ -84,7 +85,8 @@ struct mxs_mxs_i2c_data {
resource_size_t dmairq;
};
struct platform_device * __init mxs_add_mxs_i2c(
- const struct mxs_mxs_i2c_data *data);
+ const struct mxs_mxs_i2c_data *data,
+ const struct mxs_i2c_platform_data *pdata);
/* mmc */
#include <mach/mmc.h>
diff --git a/arch/arm/mach-mxs/mach-apx4devkit.c b/arch/arm/mach-mxs/mach-apx4devkit.c
index 48a7fab..cfa5390 100644
--- a/arch/arm/mach-mxs/mach-apx4devkit.c
+++ b/arch/arm/mach-mxs/mach-apx4devkit.c
@@ -26,6 +26,7 @@
#include <linux/regulator/machine.h>
#include <linux/regulator/fixed.h>
#include <linux/micrel_phy.h>
+#include <linux/i2c/mxs-i2c.h>
#include <asm/mach-types.h>
#include <asm/mach/arch.h>
@@ -146,6 +147,10 @@ static const struct i2c_board_info apx4devkit_i2c_boardinfo[] __initconst = {
{ I2C_BOARD_INFO("pcf8563", 0x51) }, /* RTC */
};
+static struct mxs_i2c_platform_data apx4devkit_i2c_pdata = {
+ .speed_khz = 100,
+};
+
#if defined(CONFIG_REGULATOR_FIXED_VOLTAGE) || \
defined(CONFIG_REGULATOR_FIXED_VOLTAGE_MODULE)
static struct regulator_consumer_supply apx4devkit_audio_consumer_supplies[] = {
@@ -235,7 +240,7 @@ static void __init apx4devkit_init(void)
apx4devkit_add_regulators();
- mx28_add_mxs_i2c(0);
+ mx28_add_mxs_i2c(0, &apx4devkit_i2c_pdata);
i2c_register_board_info(0, apx4devkit_i2c_boardinfo,
ARRAY_SIZE(apx4devkit_i2c_boardinfo));
diff --git a/arch/arm/mach-mxs/mach-m28evk.c b/arch/arm/mach-mxs/mach-m28evk.c
index 06d7996..f8eb2b9 100644
--- a/arch/arm/mach-mxs/mach-m28evk.c
+++ b/arch/arm/mach-mxs/mach-m28evk.c
@@ -24,7 +24,7 @@
#include <linux/clk.h>
#include <linux/i2c.h>
#include <linux/i2c/at24.h>
-
+#include <linux/i2c/mxs-i2c.h>
#include <asm/mach-types.h>
#include <asm/mach/arch.h>
#include <asm/mach/time.h>
@@ -305,6 +305,10 @@ static struct i2c_board_info m28_stk5v3_i2c_boardinfo[] __initdata = {
},
};
+static struct mxs_i2c_platform_data m28_i2c_pdata = {
+ .speed_khz = 400,
+};
+
static struct mxs_mmc_platform_data m28evk_mmc_pdata[] __initdata = {
{
/* mmc0 */
@@ -341,7 +345,7 @@ static void __init m28evk_init(void)
gpio_led_register_device(0, &m28evk_led_data);
/* I2C */
- mx28_add_mxs_i2c(0);
+ mx28_add_mxs_i2c(0, &m28_i2c_pdata);
i2c_register_board_info(0, m28_stk5v3_i2c_boardinfo,
ARRAY_SIZE(m28_stk5v3_i2c_boardinfo));
}
diff --git a/arch/arm/mach-mxs/mach-mx28evk.c b/arch/arm/mach-mxs/mach-mx28evk.c
index e386c14..a2792cf 100644
--- a/arch/arm/mach-mxs/mach-mx28evk.c
+++ b/arch/arm/mach-mxs/mach-mx28evk.c
@@ -20,6 +20,7 @@
#include <linux/i2c.h>
#include <linux/regulator/machine.h>
#include <linux/regulator/fixed.h>
+#include <linux/i2c/mxs-i2c.h>
#include <asm/mach-types.h>
#include <asm/mach/arch.h>
@@ -349,6 +350,10 @@ static struct i2c_board_info mxs_i2c0_board_info[] __initdata = {
},
};
+static struct mxs_i2c_platform_data mxs_i2c_pdata = {
+ .speed_khz = 100,
+};
+
#if defined(CONFIG_REGULATOR_FIXED_VOLTAGE) || defined(CONFIG_REGULATOR_FIXED_VOLTAGE_MODULE)
static struct regulator_consumer_supply mx28evk_audio_consumer_supplies[] = {
REGULATOR_SUPPLY("VDDA", "0-000a"),
@@ -439,7 +444,7 @@ static void __init mx28evk_init(void)
mx28_add_saif(0, &mx28evk_mxs_saif_pdata[0]);
mx28_add_saif(1, &mx28evk_mxs_saif_pdata[1]);
- mx28_add_mxs_i2c(0);
+ mx28_add_mxs_i2c(0, &mxs_i2c_pdata);
i2c_register_board_info(0, mxs_i2c0_board_info,
ARRAY_SIZE(mxs_i2c0_board_info));
diff --git a/arch/arm/mach-mxs/mach-tx28.c b/arch/arm/mach-mxs/mach-tx28.c
index 2c0862e..9c85376 100644
--- a/arch/arm/mach-mxs/mach-tx28.c
+++ b/arch/arm/mach-mxs/mach-tx28.c
@@ -15,6 +15,7 @@
#include <linux/spi/spi.h>
#include <linux/spi/spi_gpio.h>
#include <linux/i2c.h>
+#include <linux/i2c/mxs-i2c.h>
#include <asm/mach/arch.h>
#include <asm/mach/time.h>
@@ -139,6 +140,10 @@ static struct i2c_board_info tx28_stk5v3_i2c_boardinfo[] __initdata = {
},
};
+static struct mxs_i2c_platform_data tx28_i2c_pdata = {
+ .speed_khz = 100,
+};
+
static struct mxs_mmc_platform_data tx28_mmc0_pdata __initdata = {
.wp_gpio = -EINVAL,
.flags = SLOTF_4_BIT_CAPABLE,
@@ -157,7 +162,7 @@ static void __init tx28_stk5v3_init(void)
spi_register_board_info(tx28_spi_board_info,
ARRAY_SIZE(tx28_spi_board_info));
gpio_led_register_device(0, &tx28_stk5v3_led_data);
- mx28_add_mxs_i2c(0);
+ mx28_add_mxs_i2c(0, &tx28_i2c_pdata);
i2c_register_board_info(0, tx28_stk5v3_i2c_boardinfo,
ARRAY_SIZE(tx28_stk5v3_i2c_boardinfo));
mx28_add_mxs_mmc(0, &tx28_mmc0_pdata);
diff --git a/include/linux/i2c/mxs-i2c.h b/include/linux/i2c/mxs-i2c.h
new file mode 100644
index 0000000..781b080
--- /dev/null
+++ b/include/linux/i2c/mxs-i2c.h
@@ -0,0 +1,21 @@
+/*
+ * Freescale MXS I2C bus driver shared data
+ *
+ * Copyright (C) 2012
+ * Marek Vasut, DENX Software Engineering, <marex at denx.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ */
+
+#ifndef __INCLUDE_LINUX_I2C_MXS_I2C_H__
+#define __INCLUDE_LINUX_I2C_MXS_I2C_H__
+
+struct mxs_i2c_platform_data {
+ uint16_t speed_khz;
+};
+
+#endif /* __INCLUDE_LINUX_I2C_MXS_I2C_H__ */
--
1.7.10
More information about the linux-arm-kernel
mailing list