diff options
| author | Javier Martin <javier.martin@vista-silicon.com> | 2012-04-10 11:26:59 +0200 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2012-04-16 09:49:31 +0200 |
| commit | 435ca24116bc5365a10fa0be1bf1c1e4c5680157 (patch) | |
| tree | 2a9955e254df83ad5bb5bcc65f7a35b3d46f2e35 | |
| parent | 19a3dab69747e1bace7987da5cd527fe998d7012 (diff) | |
ARM i.MX: Visstrim_M10: Add board version detection.
Visstrim_M10 boards have 3 gpios to detect the
expansion board version attached and other 3 to
detect the motherboard revision.
Signed-off-by: Javier Martin <javier.martin@vista-silicon.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
| -rw-r--r-- | arch/arm/mach-imx/mach-imx27_visstrim_m10.c | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/arch/arm/mach-imx/mach-imx27_visstrim_m10.c b/arch/arm/mach-imx/mach-imx27_visstrim_m10.c index f7b074f496f0..748ba2e311b5 100644 --- a/arch/arm/mach-imx/mach-imx27_visstrim_m10.c +++ b/arch/arm/mach-imx/mach-imx27_visstrim_m10.c @@ -38,6 +38,7 @@ #include <asm/mach-types.h> #include <asm/mach/arch.h> #include <asm/mach/time.h> +#include <asm/system.h> #include <mach/common.h> #include <mach/iomux-mx27.h> @@ -48,6 +49,14 @@ #define OTG_PHY_CS_GPIO (GPIO_PORTF + 17) #define SDHC1_IRQ IRQ_GPIOB(25) +#define MOTHERBOARD_BIT2 (GPIO_PORTD + 31) +#define MOTHERBOARD_BIT1 (GPIO_PORTD + 30) +#define MOTHERBOARD_BIT0 (GPIO_PORTD + 29) + +#define EXPBOARD_BIT2 (GPIO_PORTD + 25) +#define EXPBOARD_BIT1 (GPIO_PORTD + 27) +#define EXPBOARD_BIT0 (GPIO_PORTD + 28) + static const int visstrim_m10_pins[] __initconst = { /* UART1 (console) */ PE12_PF_UART1_TXD, @@ -119,6 +128,23 @@ static const int visstrim_m10_pins[] __initconst = { PB19_PF_CSI_D7, PB20_PF_CSI_VSYNC, PB21_PF_CSI_HSYNC, + /* mother board version */ + MOTHERBOARD_BIT2 | GPIO_GPIO | GPIO_IN | GPIO_PUEN, + MOTHERBOARD_BIT1 | GPIO_GPIO | GPIO_IN | GPIO_PUEN, + MOTHERBOARD_BIT0 | GPIO_GPIO | GPIO_IN | GPIO_PUEN, + /* expansion board version */ + EXPBOARD_BIT2 | GPIO_GPIO | GPIO_IN | GPIO_PUEN, + EXPBOARD_BIT1 | GPIO_GPIO | GPIO_IN | GPIO_PUEN, + EXPBOARD_BIT0 | GPIO_GPIO | GPIO_IN | GPIO_PUEN, +}; + +static struct gpio visstrim_m10_version_gpios[] = { + { EXPBOARD_BIT0, GPIOF_IN, "exp-version-0" }, + { EXPBOARD_BIT1, GPIOF_IN, "exp-version-1" }, + { EXPBOARD_BIT2, GPIOF_IN, "exp-version-2" }, + { MOTHERBOARD_BIT0, GPIOF_IN, "mother-version-0" }, + { MOTHERBOARD_BIT1, GPIOF_IN, "mother-version-1" }, + { MOTHERBOARD_BIT2, GPIOF_IN, "mother-version-2" }, }; /* Camera */ @@ -369,11 +395,40 @@ static const struct imx_ssi_platform_data visstrim_m10_ssi_pdata __initconst = { .flags = IMX_SSI_DMA | IMX_SSI_SYN, }; +static void __init visstrim_m10_revision(void) +{ + int exp_version = 0; + int mo_version = 0; + int ret; + + ret = gpio_request_array(visstrim_m10_version_gpios, + ARRAY_SIZE(visstrim_m10_version_gpios)); + if (ret) { + pr_err("Failed to request version gpios"); + return; + } + + /* Get expansion board version (negative logic) */ + exp_version |= !gpio_get_value(EXPBOARD_BIT2) << 2; + exp_version |= !gpio_get_value(EXPBOARD_BIT1) << 1; + exp_version |= !gpio_get_value(EXPBOARD_BIT0); + + /* Get mother board version (negative logic) */ + mo_version |= !gpio_get_value(MOTHERBOARD_BIT2) << 2; + mo_version |= !gpio_get_value(MOTHERBOARD_BIT1) << 1; + mo_version |= !gpio_get_value(MOTHERBOARD_BIT0); + + system_rev = 0x27000; + system_rev |= (mo_version << 4); + system_rev |= exp_version; +} + static void __init visstrim_m10_board_init(void) { int ret; imx27_soc_init(); + visstrim_m10_revision(); ret = mxc_gpio_setup_multiple_pins(visstrim_m10_pins, ARRAY_SIZE(visstrim_m10_pins), "VISSTRIM_M10"); |