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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>
This commit is contained in:
Javier Martin 2012-04-10 11:26:59 +02:00 committed by Sascha Hauer
parent 19a3dab697
commit 435ca24116
1 changed files with 55 additions and 0 deletions
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55
arch/arm/mach-imx/mach-imx27_visstrim_m10.c
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@ -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");