[PATCH v3] pxa/hx4700: Fix basic suspend/resume

[Paul Parsons]

Basic suspend/resume is fixed by ensuring that the PGSR registers are set
correctly before sleep mode is entered. In particular four of the active low
resets need to be driven high while in sleep mode, otherwise the unit resets
itself instead of suspending. Another problem was that the PCFR_GPROD bit is set
by the HTC bootloader; this caused GPIO reset (i.e. the reset button) to fail
immediately after returning from sleep mode.

Signed-off-by: Paul Parsons <lost.distance at yahoo.com>
---

V3:
Changed GPIO72, GPIO96 back to KEEP_OUTPUT.

diff -uprN clean-3.3-rc6/arch/arm/mach-pxa/hx4700.c linux-3.3-rc6/arch/arm/mach-pxa/hx4700.c
--- clean-3.3-rc6/arch/arm/mach-pxa/hx4700.c	2012-03-04 01:08:09.000000000 +0000
+++ linux-3.3-rc6/arch/arm/mach-pxa/hx4700.c	2012-03-10 14:42:41.328255002 +0000
@@ -121,7 +121,11 @@ static unsigned long hx4700_pin_config[]
 	GPIO19_SSP2_SCLK,
 	GPIO86_SSP2_RXD,
 	GPIO87_SSP2_TXD,
-	GPIO88_GPIO,
+	GPIO88_GPIO | MFP_LPM_DRIVE_HIGH,	/* TSC2046_CS */
+
+	/* BQ24022 Regulator */
+	GPIO72_GPIO | MFP_LPM_KEEP_OUTPUT,	/* BQ24022_nCHARGE_EN */
+	GPIO96_GPIO | MFP_LPM_KEEP_OUTPUT,	/* BQ24022_ISET2 */
 
 	/* HX4700 specific input GPIOs */
 	GPIO12_GPIO,	/* ASIC3_IRQ */
@@ -134,6 +138,11 @@ static unsigned long hx4700_pin_config[]
 	GPIO108_GPIO,	/* GSM_READY */
 	GPIO58_GPIO,	/* TSC2046_nPENIRQ */
 	GPIO66_GPIO,	/* nSDIO_IRQ */
+
+	GPIO61_GPIO | MFP_LPM_DRIVE_HIGH,	/* W3220_nRESET */
+	GPIO71_GPIO | MFP_LPM_DRIVE_HIGH,	/* ASIC3_nRESET */
+	GPIO81_GPIO | MFP_LPM_DRIVE_HIGH,	/* CPU_GP_nRESET */
+	GPIO116_GPIO | MFP_LPM_DRIVE_HIGH,	/* CPU_HW_nRESET */
 };
 
 /*
@@ -828,15 +837,20 @@ static struct gpio global_gpios[] = {
 	{ GPIO110_HX4700_LCD_LVDD_3V3_ON, GPIOF_OUT_INIT_HIGH, "LCD_LVDD" },
 	{ GPIO111_HX4700_LCD_AVDD_3V3_ON, GPIOF_OUT_INIT_HIGH, "LCD_AVDD" },
 	{ GPIO32_HX4700_RS232_ON,         GPIOF_OUT_INIT_HIGH, "RS232_ON" },
+	{ GPIO61_HX4700_W3220_nRESET,     GPIOF_OUT_INIT_HIGH, "W3220_nRESET" },
 	{ GPIO71_HX4700_ASIC3_nRESET,     GPIOF_OUT_INIT_HIGH, "ASIC3_nRESET" },
+	{ GPIO81_HX4700_CPU_GP_nRESET,    GPIOF_OUT_INIT_HIGH, "CPU_GP_nRESET" },
 	{ GPIO82_HX4700_EUART_RESET,      GPIOF_OUT_INIT_HIGH, "EUART_RESET" },
 	{ GPIO105_HX4700_nIR_ON,          GPIOF_OUT_INIT_HIGH, "nIR_EN" },
+	{ GPIO116_HX4700_CPU_HW_nRESET,   GPIOF_OUT_INIT_HIGH, "CPU_HW_nRESET" },
 };
 
 static void __init hx4700_init(void)
 {
 	int ret;
 
+	PCFR = PCFR_GPR_EN | PCFR_OPDE;
+
 	pxa2xx_mfp_config(ARRAY_AND_SIZE(hx4700_pin_config));
 	ret = gpio_request_array(ARRAY_AND_SIZE(global_gpios));
 	if (ret)