From 41561f28e76a47dc6de0a954da85d0b5c42874eb Mon Sep 17 00:00:00 2001 From: Vitaly Wool Date: Sun, 10 Dec 2006 21:21:29 +0100 Subject: i2c: New Philips PNX bus driver New I2C bus driver for Philips ARM boards (Philips IP3204 I2C IP block). This I2C controller can be found on (at least) PNX010x, PNX52xx and PNX4008 Philips boards. Signed-off-by: Vitaly Wool Signed-off-by: Jean Delvare --- arch/arm/mach-pnx4008/Makefile | 2 +- arch/arm/mach-pnx4008/i2c.c | 167 +++++++++++++++++++++++++++++++++++++++++ 2 files changed, 168 insertions(+), 1 deletion(-) create mode 100644 arch/arm/mach-pnx4008/i2c.c (limited to 'arch') diff --git a/arch/arm/mach-pnx4008/Makefile b/arch/arm/mach-pnx4008/Makefile index b457ca0a43..777564c90a 100644 --- a/arch/arm/mach-pnx4008/Makefile +++ b/arch/arm/mach-pnx4008/Makefile @@ -2,7 +2,7 @@ # Makefile for the linux kernel. # -obj-y := core.o irq.o time.o clock.o gpio.o serial.o dma.o +obj-y := core.o irq.o time.o clock.o gpio.o serial.o dma.o i2c.o obj-m := obj-n := obj- := diff --git a/arch/arm/mach-pnx4008/i2c.c b/arch/arm/mach-pnx4008/i2c.c new file mode 100644 index 0000000000..6f308827c4 --- /dev/null +++ b/arch/arm/mach-pnx4008/i2c.c @@ -0,0 +1,167 @@ +/* + * I2C initialization for PNX4008. + * + * Author: Vitaly Wool + * + * 2005-2006 (c) MontaVista Software, Inc. 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 +#include +#include +#include +#include +#include +#include + +static int set_clock_run(struct platform_device *pdev) +{ + struct clk *clk; + char name[10]; + int retval = 0; + + snprintf(name, 10, "i2c%d_ck", pdev->id); + clk = clk_get(&pdev->dev, name); + if (!IS_ERR(clk)) { + clk_set_rate(clk, 1); + clk_put(clk); + } else + retval = -ENOENT; + + return retval; +} + +static int set_clock_stop(struct platform_device *pdev) +{ + struct clk *clk; + char name[10]; + int retval = 0; + + snprintf(name, 10, "i2c%d_ck", pdev->id); + clk = clk_get(&pdev->dev, name); + if (!IS_ERR(clk)) { + clk_set_rate(clk, 0); + clk_put(clk); + } else + retval = -ENOENT; + + return retval; +} + +static int i2c_pnx_suspend(struct platform_device *pdev, pm_message_t state) +{ + int retval = 0; +#ifdef CONFIG_PM + retval = set_clock_run(pdev); +#endif + return retval; +} + +static int i2c_pnx_resume(struct platform_device *pdev) +{ + int retval = 0; +#ifdef CONFIG_PM + retval = set_clock_run(pdev); +#endif + return retval; +} + +static u32 calculate_input_freq(struct platform_device *pdev) +{ + return HCLK_MHZ; +} + + +static struct i2c_pnx_algo_data pnx_algo_data0 = { + .base = PNX4008_I2C1_BASE, + .irq = I2C_1_INT, +}; + +static struct i2c_pnx_algo_data pnx_algo_data1 = { + .base = PNX4008_I2C2_BASE, + .irq = I2C_2_INT, +}; + +static struct i2c_pnx_algo_data pnx_algo_data2 = { + .base = (PNX4008_USB_CONFIG_BASE + 0x300), + .irq = USB_I2C_INT, +}; + +static struct i2c_adapter pnx_adapter0 = { + .name = I2C_CHIP_NAME "0", + .algo_data = &pnx_algo_data0, +}; +static struct i2c_adapter pnx_adapter1 = { + .name = I2C_CHIP_NAME "1", + .algo_data = &pnx_algo_data1, +}; + +static struct i2c_adapter pnx_adapter2 = { + .name = "USB-I2C", + .algo_data = &pnx_algo_data2, +}; + +static struct i2c_pnx_data i2c0_data = { + .suspend = i2c_pnx_suspend, + .resume = i2c_pnx_resume, + .calculate_input_freq = calculate_input_freq, + .set_clock_run = set_clock_run, + .set_clock_stop = set_clock_stop, + .adapter = &pnx_adapter0, +}; + +static struct i2c_pnx_data i2c1_data = { + .suspend = i2c_pnx_suspend, + .resume = i2c_pnx_resume, + .calculate_input_freq = calculate_input_freq, + .set_clock_run = set_clock_run, + .set_clock_stop = set_clock_stop, + .adapter = &pnx_adapter1, +}; + +static struct i2c_pnx_data i2c2_data = { + .suspend = i2c_pnx_suspend, + .resume = i2c_pnx_resume, + .calculate_input_freq = calculate_input_freq, + .set_clock_run = set_clock_run, + .set_clock_stop = set_clock_stop, + .adapter = &pnx_adapter2, +}; + +static struct platform_device i2c0_device = { + .name = "pnx-i2c", + .id = 0, + .dev = { + .platform_data = &i2c0_data, + }, +}; + +static struct platform_device i2c1_device = { + .name = "pnx-i2c", + .id = 1, + .dev = { + .platform_data = &i2c1_data, + }, +}; + +static struct platform_device i2c2_device = { + .name = "pnx-i2c", + .id = 2, + .dev = { + .platform_data = &i2c2_data, + }, +}; + +static struct platform_device *devices[] __initdata = { + &i2c0_device, + &i2c1_device, + &i2c2_device, +}; + +void __init pnx4008_register_i2c_devices(void) +{ + platform_add_devices(devices, ARRAY_SIZE(devices)); +} -- cgit v1.2.2 From 6b65cd742823f78a6538491982159098ab5fcae1 Mon Sep 17 00:00:00 2001 From: Russell King Date: Sun, 10 Dec 2006 21:21:32 +0100 Subject: i2c: New ARM Versatile/Realview bus driver Add support for the I2C bus found on the ARM Versatile and Realview platforms. The I2C bus has a RTC and optionally some EEPROMs attached. Signed-off-by: Russell King Signed-off-by: Jean Delvare --- arch/arm/mach-realview/core.c | 13 +++++++++++++ arch/arm/mach-realview/core.h | 1 + arch/arm/mach-realview/realview_eb.c | 1 + arch/arm/mach-versatile/core.c | 14 ++++++++++++++ 4 files changed, 29 insertions(+) (limited to 'arch') diff --git a/arch/arm/mach-realview/core.c b/arch/arm/mach-realview/core.c index 68c67053f4..84d3fe76e9 100644 --- a/arch/arm/mach-realview/core.c +++ b/arch/arm/mach-realview/core.c @@ -141,6 +141,19 @@ struct platform_device realview_smc91x_device = { .resource = realview_smc91x_resources, }; +static struct resource realview_i2c_resource = { + .start = REALVIEW_I2C_BASE, + .end = REALVIEW_I2C_BASE + SZ_4K - 1, + .flags = IORESOURCE_MEM, +}; + +struct platform_device realview_i2c_device = { + .name = "versatile-i2c", + .id = -1, + .num_resources = 1, + .resource = &realview_i2c_resource, +}; + #define REALVIEW_SYSMCI (__io_address(REALVIEW_SYS_BASE) + REALVIEW_SYS_MCI_OFFSET) static unsigned int realview_mmc_status(struct device *dev) diff --git a/arch/arm/mach-realview/core.h b/arch/arm/mach-realview/core.h index 93e86d9f43..2b53420f9c 100644 --- a/arch/arm/mach-realview/core.h +++ b/arch/arm/mach-realview/core.h @@ -108,6 +108,7 @@ static struct amba_device name##_device = { \ extern struct platform_device realview_flash_device; extern struct platform_device realview_smc91x_device; +extern struct platform_device realview_i2c_device; extern struct mmc_platform_data realview_mmc0_plat_data; extern struct mmc_platform_data realview_mmc1_plat_data; extern struct clk realview_clcd_clk; diff --git a/arch/arm/mach-realview/realview_eb.c b/arch/arm/mach-realview/realview_eb.c index 84a959530f..9741b4d3c9 100644 --- a/arch/arm/mach-realview/realview_eb.c +++ b/arch/arm/mach-realview/realview_eb.c @@ -155,6 +155,7 @@ static void __init realview_eb_init(void) platform_device_register(&realview_flash_device); platform_device_register(&realview_smc91x_device); + platform_device_register(&realview_i2c_device); for (i = 0; i < ARRAY_SIZE(amba_devs); i++) { struct amba_device *d = amba_devs[i]; diff --git a/arch/arm/mach-versatile/core.c b/arch/arm/mach-versatile/core.c index 5719694755..bf71507c76 100644 --- a/arch/arm/mach-versatile/core.c +++ b/arch/arm/mach-versatile/core.c @@ -325,6 +325,19 @@ static struct platform_device smc91x_device = { .resource = smc91x_resources, }; +static struct resource versatile_i2c_resource = { + .start = VERSATILE_I2C_BASE, + .end = VERSATILE_I2C_BASE + SZ_4K - 1, + .flags = IORESOURCE_MEM, +}; + +static struct platform_device versatile_i2c_device = { + .name = "versatile-i2c", + .id = -1, + .num_resources = 1, + .resource = &versatile_i2c_resource, +}; + #define VERSATILE_SYSMCI (__io_address(VERSATILE_SYS_BASE) + VERSATILE_SYS_MCI_OFFSET) unsigned int mmc_status(struct device *dev) @@ -775,6 +788,7 @@ void __init versatile_init(void) clk_register(&versatile_clcd_clk); platform_device_register(&versatile_flash_device); + platform_device_register(&versatile_i2c_device); platform_device_register(&smc91x_device); for (i = 0; i < ARRAY_SIZE(amba_devs); i++) { -- cgit v1.2.2