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authorDavid Brownell <dbrownell@users.sourceforge.net>2008-12-10 17:35:53 -0800
committerTony Lindgren <tony@atomide.com>2008-12-10 17:35:53 -0800
commit2430c62e4b2e7604d749351393aaeefc478e4e36 (patch)
treebd810e53c4fc5513af238924af571fd04dee2748
parentARM: OMAP: Switch ohci-omap to gpio_request/free calls (diff)
downloadlinux-dev-2430c62e4b2e7604d749351393aaeefc478e4e36.tar.xz
linux-dev-2430c62e4b2e7604d749351393aaeefc478e4e36.zip
ARM: OMAP1: osk5912: Mistral eeprom support
List the 4 Kbit I2C EEPROM included on the Mistral board. Also add a comment about the hardware workaround needed to properly support the WAKE button. More info at http://elinux.org/OSK_Mistral_wakeup_button_mod Still no support for the (optional) camera sensor. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Tony Lindgren <tony@atomide.com>
-rw-r--r--arch/arm/mach-omap1/board-osk.c29
1 files changed, 27 insertions, 2 deletions
diff --git a/arch/arm/mach-omap1/board-osk.c b/arch/arm/mach-omap1/board-osk.c
index 2f880958b83b..4b7c1bcbed69 100644
--- a/arch/arm/mach-omap1/board-osk.c
+++ b/arch/arm/mach-omap1/board-osk.c
@@ -260,7 +260,6 @@ static struct i2c_board_info __initdata osk_i2c_board_info[] = {
},
/* TODO when driver support is ready:
* - aic23 audio chip at 0x1a
- * - on Mistral, 24c04 eeprom at 0x50
* - optionally on Mistral, ov9640 camera sensor at 0x30
*/
};
@@ -337,11 +336,28 @@ static struct omap_board_config_kernel osk_config[] __initdata = {
#ifdef CONFIG_OMAP_OSK_MISTRAL
#include <linux/input.h>
+#include <linux/i2c/at24.h>
#include <linux/spi/spi.h>
#include <linux/spi/ads7846.h>
#include <mach/keypad.h>
+static struct at24_platform_data at24c04 = {
+ .byte_len = SZ_4K / 8,
+ .page_size = 16,
+};
+
+static struct i2c_board_info __initdata mistral_i2c_board_info[] = {
+ {
+ /* NOTE: powered from LCD supply */
+ I2C_BOARD_INFO("24c04", 0x50),
+ .platform_data = &at24c04,
+ },
+ /* TODO when driver support is ready:
+ * - optionally ov9640 camera sensor at 0x30
+ */
+};
+
static const int osk_keymap[] = {
/* KEY(col, row, code) */
KEY(0, 0, KEY_F1), /* SW4 */
@@ -488,7 +504,13 @@ static void __init osk_mistral_init(void)
spi_register_board_info(mistral_boardinfo,
ARRAY_SIZE(mistral_boardinfo));
- /* the sideways button (SW1) is for use as a "wakeup" button */
+ /* the sideways button (SW1) is for use as a "wakeup" button
+ *
+ * NOTE: The Mistral board has the wakeup button (SW1) wired
+ * to the LCD 3.3V rail, which is powered down during suspend.
+ * To allow this button to wake up the omap, work around this
+ * HW bug by rewiring SW1 to use the main 3.3V rail.
+ */
omap_cfg_reg(N15_1610_MPUIO2);
if (gpio_request(OMAP_MPUIO(2), "wakeup") == 0) {
int ret = 0;
@@ -521,6 +543,9 @@ static void __init osk_mistral_init(void)
if (gpio_request(2, "lcd_pwr") == 0)
gpio_direction_output(2, 1);
+ i2c_register_board_info(1, mistral_i2c_board_info,
+ ARRAY_SIZE(mistral_i2c_board_info));
+
platform_add_devices(mistral_devices, ARRAY_SIZE(mistral_devices));
}
#else