diff options
| author | Vaibhav Hiremath <hvaibhav@ti.com> | 2010-02-13 11:47:57 +0000 |
|---|---|---|
| committer | Tony Lindgren <tony@atomide.com> | 2010-02-19 15:22:17 -0800 |
| commit | 5d4292a524d8908060b077f4d80c106cb288f2e7 (patch) | |
| tree | 4e976be70a29c8246c4cc5cf5f6c42562f980b8c | |
| parent | f2afbbb82e263086d02a772e43f5290b1a6f673e (diff) | |
| download | linux-5d4292a524d8908060b077f4d80c106cb288f2e7.tar.bz2 | |
AM3517: Enable I2C-GPIO Expander driver support for AM3517EVM
Add platform hook-up interface to support I2C based GPIo expander
(TCA6416).
There are 3 instances of I2C Expander on AM3517EVM,
- One is over I2C-2 mounted on Base board
- Two are over I2C3 mounted on UI Card
Signed-off-by: Vaibhav Hiremath <hvaibhav@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
| -rw-r--r-- | arch/arm/mach-omap2/board-am3517evm.c | 40 |
1 files changed, 38 insertions, 2 deletions
diff --git a/arch/arm/mach-omap2/board-am3517evm.c b/arch/arm/mach-omap2/board-am3517evm.c index fe2446ded5ad..e6b8967f5e68 100644 --- a/arch/arm/mach-omap2/board-am3517evm.c +++ b/arch/arm/mach-omap2/board-am3517evm.c @@ -20,6 +20,7 @@ #include <linux/init.h> #include <linux/platform_device.h> #include <linux/gpio.h> +#include <linux/i2c/pca953x.h> #include <mach/hardware.h> #include <mach/am35xx.h> @@ -71,11 +72,46 @@ static void __init am3517_evm_rtc_init(void) am3517evm_i2c_boardinfo[0].irq = gpio_to_irq(GPIO_RTCS35390A_IRQ); } +/* + * I2C GPIO Expander - TCA6416 + */ + +/* Mounted on Base-Board */ +static struct pca953x_platform_data am3517evm_gpio_expander_info_0 = { + .gpio_base = OMAP_MAX_GPIO_LINES, +}; +static struct i2c_board_info __initdata am3517evm_tca6516_info_0[] = { + { + I2C_BOARD_INFO("tca6416", 0x21), + .platform_data = &am3517evm_gpio_expander_info_0, + }, +}; + +/* Mounted on UI Card */ +static struct pca953x_platform_data am3517evm_ui_gpio_expander_info_1 = { + .gpio_base = OMAP_MAX_GPIO_LINES + 16, +}; +static struct pca953x_platform_data am3517evm_ui_gpio_expander_info_2 = { + .gpio_base = OMAP_MAX_GPIO_LINES + 32, +}; +static struct i2c_board_info __initdata am3517evm_ui_tca6516_info[] = { + { + I2C_BOARD_INFO("tca6416", 0x20), + .platform_data = &am3517evm_ui_gpio_expander_info_1, + }, + { + I2C_BOARD_INFO("tca6416", 0x21), + .platform_data = &am3517evm_ui_gpio_expander_info_2, + }, +}; + static int __init am3517_evm_i2c_init(void) { omap_register_i2c_bus(1, 400, NULL, 0); - omap_register_i2c_bus(2, 400, NULL, 0); - omap_register_i2c_bus(3, 400, NULL, 0); + omap_register_i2c_bus(2, 400, am3517evm_tca6516_info_0, + ARRAY_SIZE(am3517evm_tca6516_info_0)); + omap_register_i2c_bus(3, 400, am3517evm_ui_tca6516_info, + ARRAY_SIZE(am3517evm_ui_tca6516_info)); return 0; } |