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Old 09-25-2010, 06:26 PM
Enric Balletbo i Serra
 
Default omap3: Introduce function to detect the IGEP v2 hardware revision.

Signed-off-by: Enric Balletbo i Serra <eballetbo@gmail.com>
---
arch/arm/mach-omap2/board-igep0020.c | 47 ++++++++++++++++++++++++++++++++++
1 files changed, 47 insertions(+), 0 deletions(-)

diff --git a/arch/arm/mach-omap2/board-igep0020.c b/arch/arm/mach-omap2/board-igep0020.c
index 9f25d0d..a386425 100644
--- a/arch/arm/mach-omap2/board-igep0020.c
+++ b/arch/arm/mach-omap2/board-igep0020.c
@@ -45,6 +45,49 @@
#define IGEP2_GPIO_WIFI_NPD 94
#define IGEP2_GPIO_WIFI_NRESET 95

+/*
+ * IGEP2 Hardware Revision Table
+ *
+ * --------------------------
+ * | Id. | Hw Rev. | HW0 (28) |
+ * --------------------------
+ * | 0 | B/C | high |
+ * | 1 | C | low |
+ * --------------------------
+ */
+
+#define IGEP2_BOARD_HWREV_B 0
+#define IGEP2_BOARD_HWREV_C 1
+
+static u8 hwrev;
+
+static void __init igep2_get_revision(void)
+{
+ u8 ret;
+
+ omap_mux_init_gpio(IGEP2_GPIO_LED1_RED, OMAP_PIN_INPUT);
+
+ if ((gpio_request(IGEP2_GPIO_LED1_RED, "GPIO_HW0_REV") == 0) &&
+ (gpio_direction_input(IGEP2_GPIO_LED1_RED) == 0)) {
+ ret = gpio_get_value(IGEP2_GPIO_LED1_RED);
+ if (hwrev == 0) {
+ pr_info("IGEP2: Hardware Revision C (B-NON compatible)
");
+ hwrev = IGEP2_BOARD_HWREV_C;
+ } else if (hwrev == 1) {
+ pr_info("IGEP2: Hardware Revision B/C (B compatible)
");
+ hwrev = IGEP2_BOARD_HWREV_B;
+ } else {
+ pr_err("IGEP2: Unknow Hardware Revision
");
+ hwrev = -1;
+ }
+ } else {
+ pr_warning("IGEP2: Could not obtain gpio GPIO_HW0_REV
");
+ pr_err("IGEP2: Unknow Hardware Revision
");
+ }
+
+ gpio_free(IGEP2_GPIO_LED1_RED);
+}
+
#if defined(CONFIG_MTD_ONENAND_OMAP2) ||
defined(CONFIG_MTD_ONENAND_OMAP2_MODULE)

@@ -535,6 +578,10 @@ static struct omap_board_mux board_mux[] __initdata = {
static void __init igep2_init(void)
{
omap3_mux_init(board_mux, OMAP_PACKAGE_CBB);
+
+ /* Get IGEP2 hardware revision */
+ igep2_get_revision();
+
igep2_i2c_init();
platform_add_devices(igep2_devices, ARRAY_SIZE(igep2_devices));
omap_serial_init();
--
1.7.0.4


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