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Commit 3f8c48d9 authored by Enric Balletbo i Serra's avatar Enric Balletbo i Serra Committed by Tony Lindgren
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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: default avatarEnric Balletbo i Serra <eballetbo@gmail.com>
Signed-off-by: default avatarTony Lindgren <tony@atomide.com>
parent bee15390

arch/arm/mach-omap2/board-igep0020.c

+47 −0
Original line number Diff line number Diff line
@@ -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();