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-rw-r--r--arch/arm/mach-pxa/include/mach/palmtreo.h3
-rw-r--r--arch/arm/mach-pxa/palmtreo.c61
2 files changed, 61 insertions, 3 deletions
diff --git a/arch/arm/mach-pxa/include/mach/palmtreo.h b/arch/arm/mach-pxa/include/mach/palmtreo.h
index 2d3f14e3be29..32661945d4c3 100644
--- a/arch/arm/mach-pxa/include/mach/palmtreo.h
+++ b/arch/arm/mach-pxa/include/mach/palmtreo.h
@@ -44,6 +44,9 @@
#define GPIO_NR_TREO680_VIBRATE_EN 44
#define GPIO_NR_TREO680_KEYB_BL 24
#define GPIO_NR_TREO680_BT_EN 43
+#define GPIO_NR_TREO680_LCD_POWER 77
+#define GPIO_NR_TREO680_LCD_EN 86
+#define GPIO_NR_TREO680_LCD_EN_N 25
#endif /* CONFIG_MACH_TREO680 */
/* Centro685 specific GPIOs */
diff --git a/arch/arm/mach-pxa/palmtreo.c b/arch/arm/mach-pxa/palmtreo.c
index 3f3c48f2f7ce..44412162fd27 100644
--- a/arch/arm/mach-pxa/palmtreo.c
+++ b/arch/arm/mach-pxa/palmtreo.c
@@ -98,9 +98,6 @@ static unsigned long treo_pin_config[] __initdata = {
GPIO96_KP_MKOUT_6,
GPIO93_KP_DKIN_0 | WAKEUP_ON_LEVEL_HIGH, /* Hotsync button */
- /* LCD */
- GPIOxx_LCD_TFT_16BPP,
-
/* Quick Capture Interface */
GPIO84_CIF_FV,
GPIO85_CIF_LV,
@@ -140,6 +137,12 @@ static unsigned long treo680_pin_config[] __initdata = {
/* MATRIX KEYPAD - different wake up source */
GPIO100_KP_MKIN_0 | WAKEUP_ON_LEVEL_HIGH,
GPIO99_KP_MKIN_5,
+
+ /* LCD... L_BIAS alt fn not configured on Treo680; is GPIO instead */
+ GPIOxx_LCD_16BPP,
+ GPIO74_LCD_FCLK,
+ GPIO75_LCD_LCLK,
+ GPIO76_LCD_PCLK,
};
#endif /* CONFIG_MACH_TREO680 */
@@ -155,6 +158,9 @@ static unsigned long centro685_pin_config[] __initdata = {
/* MATRIX KEYPAD - different wake up source */
GPIO100_KP_MKIN_0,
GPIO99_KP_MKIN_5 | WAKEUP_ON_LEVEL_HIGH,
+
+ /* LCD */
+ GPIOxx_LCD_TFT_16BPP,
};
#endif /* CONFIG_MACH_CENTRO */
@@ -424,10 +430,59 @@ static void __init palmphone_common_init(void)
}
#ifdef CONFIG_MACH_TREO680
+void __init treo680_gpio_init(void)
+{
+ unsigned int gpio;
+
+ /* drive all three lcd gpios high initially */
+ const unsigned long lcd_flags = GPIOF_INIT_HIGH | GPIOF_DIR_OUT;
+
+ /*
+ * LCD GPIO initialization...
+ */
+
+ /*
+ * This is likely the power to the lcd. Toggling it low/high appears to
+ * turn the lcd off/on. Can be toggled after lcd is initialized without
+ * any apparent adverse effects to the lcd operation. Note that this
+ * gpio line is used by the lcd controller as the L_BIAS signal, but
+ * treo680 configures it as gpio.
+ */
+ gpio = GPIO_NR_TREO680_LCD_POWER;
+ if (gpio_request_one(gpio, lcd_flags, "LCD power") < 0)
+ goto fail;
+
+ /*
+ * These two are called "enables", for lack of a better understanding.
+ * If either of these are toggled after the lcd is initialized, the
+ * image becomes degraded. N.B. The IPL shipped with the treo
+ * configures GPIO_NR_TREO680_LCD_EN_N as output and drives it high. If
+ * the IPL is ever reprogrammed, this initialization may be need to be
+ * revisited.
+ */
+ gpio = GPIO_NR_TREO680_LCD_EN;
+ if (gpio_request_one(gpio, lcd_flags, "LCD enable") < 0)
+ goto fail;
+ gpio = GPIO_NR_TREO680_LCD_EN_N;
+ if (gpio_request_one(gpio, lcd_flags, "LCD enable_n") < 0)
+ goto fail;
+
+ /* driving this low turns LCD on */
+ gpio_set_value(GPIO_NR_TREO680_LCD_EN_N, 0);
+
+ return;
+ fail:
+ pr_err("gpio %d initialization failed\n", gpio);
+ gpio_free(GPIO_NR_TREO680_LCD_POWER);
+ gpio_free(GPIO_NR_TREO680_LCD_EN);
+ gpio_free(GPIO_NR_TREO680_LCD_EN_N);
+}
+
static void __init treo680_init(void)
{
pxa2xx_mfp_config(ARRAY_AND_SIZE(treo680_pin_config));
palmphone_common_init();
+ treo680_gpio_init();
palm27x_mmc_init(GPIO_NR_TREO_SD_DETECT_N, GPIO_NR_TREO680_SD_READONLY,
GPIO_NR_TREO680_SD_POWER, 0);
}
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