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| author | Enric Balletbo i Serra <eballetbo@gmail.com> | 2010-10-08 17:22:35 (GMT) |
|---|---|---|
| committer | Tony Lindgren <tony@atomide.com> | 2010-10-08 17:22:35 (GMT) |
| commit | 3f8c48d95f8e4ed3ea241c3e8704b5ff6c423fa4 (patch) | |
| tree | debe39539ac5bde2ce59dbd7e11ab5e86d88bb85 /arch/arm/mach-omap2/board-igep0020.c | |
| parent | bee153906424f3bf669afec397c810b76117e22b (diff) | |
| download | linux-3f8c48d95f8e4ed3ea241c3e8704b5ff6c423fa4.tar.xz | |
omap3: Introduce function to detect the IGEP v2 hardwarerevision
There are currently two versions of IGEP v2 board, this patch introduces a
function to detect the hardware revision of IGEP board.
--------------------------
| Id. | Hw Rev. | GPIO 28 |
--------------------------
| 0 | B/C | high |
| 1 | C | low |
--------------------------
Signed-off-by: Enric Balletbo i Serra <eballetbo@gmail.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Diffstat (limited to 'arch/arm/mach-omap2/board-igep0020.c')
| -rw-r--r-- | 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 d7a0db7..e70bc87 100644 --- a/arch/arm/mach-omap2/board-igep0020.c +++ b/arch/arm/mach-omap2/board-igep0020.c @@ -46,6 +46,49 @@ #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 (ret == 0) { + pr_info("IGEP2: Hardware Revision C (B-NON compatible)\n"); + hwrev = IGEP2_BOARD_HWREV_C; + } else if (ret == 1) { + pr_info("IGEP2: Hardware Revision B/C (B compatible)\n"); + hwrev = IGEP2_BOARD_HWREV_B; + } else { + pr_err("IGEP2: Unknown Hardware Revision\n"); + hwrev = -1; + } + } else { + pr_warning("IGEP2: Could not obtain gpio GPIO_HW0_REV\n"); + pr_err("IGEP2: Unknown Hardware Revision\n"); + } + + gpio_free(IGEP2_GPIO_LED1_RED); +} + #if defined(CONFIG_MTD_ONENAND_OMAP2) || \ defined(CONFIG_MTD_ONENAND_OMAP2_MODULE) @@ -538,6 +581,10 @@ 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(); |