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authorJavier Martin <javier.martin@vista-silicon.com>2012-04-10 11:26:59 +0200
committerSascha Hauer <s.hauer@pengutronix.de>2012-04-16 09:49:31 +0200
commit435ca24116bc5365a10fa0be1bf1c1e4c5680157 (patch)
tree2a9955e254df83ad5bb5bcc65f7a35b3d46f2e35 /arch/arm/mach-imx
parent19a3dab69747e1bace7987da5cd527fe998d7012 (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>
Diffstat (limited to 'arch/arm/mach-imx')
-rw-r--r--arch/arm/mach-imx/mach-imx27_visstrim_m10.c55
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 f7b074f496f..748ba2e311b 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");