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OMAP3: pandora: revise GPIO configuration 

Update pandora's GPIO setup code with these changes:
- convert to gpiolib
- set up dual voltage GPIOs to match supply of 1.8V by clearing VMODE1
- add GPIO_IO_PWRDNZ configuration for DM3730 variation of pandora
  (required to enable GPIO 126, 127, and 129 I/O cells in DM3730)
- add wifi reset pulse as recommended by wifi chip's manufacturer
- drop configuration of GPIOs that u-boot doesn't need

Signed-off-by: Grazvydas Ignotas <notasas@gmail.com>
This commit is contained in:
Grazvydas Ignotas 2012-03-22 13:49:22 +00:00 committed by Albert ARIBAUD
parent 10cd73bf87
commit 7cad446b88
1 changed files with 41 additions and 13 deletions
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54
board/pandora/pandora.c
View File

@ -32,6 +32,7 @@
#include <common.h>
#include <twl4030.h>
#include <asm/io.h>
#include <asm/gpio.h>
#include <asm/arch/mmc_host_def.h>
#include <asm/arch/mux.h>
#include <asm/arch/gpio.h>
@ -45,6 +46,10 @@ DECLARE_GLOBAL_DATA_PTR;
#define TWL4030_BB_CFG_BBSEL_3200MV (3 << 2)
#define TWL4030_BB_CFG_BBISEL_500UA 2
#define CONTROL_WKUP_CTRL 0x48002a5c
#define GPIO_IO_PWRDNZ (1 << 6)
#define PBIASLITEVMODE1 (1 << 8)
/*
* Routine: board_init
* Description: Early hardware init.
@ -60,29 +65,52 @@ int board_init(void)
return 0;
}
static void set_output_gpio(unsigned int gpio, int value)
{
int ret;
ret = gpio_request(gpio, "");
if (ret != 0) {
printf("could not request GPIO %u\n", gpio);
return;
}
ret = gpio_direction_output(gpio, value);
if (ret != 0)
printf("could not set GPIO %u to %d\n", gpio, value);
}
/*
* Routine: misc_init_r
* Description: Configure board specific parts
*/
int misc_init_r(void)
{
struct gpio *gpio1_base = (struct gpio *)OMAP34XX_GPIO1_BASE;
struct gpio *gpio4_base = (struct gpio *)OMAP34XX_GPIO4_BASE;
struct gpio *gpio5_base = (struct gpio *)OMAP34XX_GPIO5_BASE;
struct gpio *gpio6_base = (struct gpio *)OMAP34XX_GPIO6_BASE;
t2_t *t2_base = (t2_t *)T2_BASE;
u32 pbias_lite;
twl4030_led_init(TWL4030_LED_LEDEN_LEDBON);
/* Configure GPIOs to output */
writel(~(GPIO14 | GPIO15 | GPIO16 | GPIO23), &gpio1_base->oe);
writel(~GPIO22, &gpio4_base->oe); /* 118 */
writel(~(GPIO0 | GPIO1 | GPIO28 | GPIO29 | GPIO30 | GPIO31),
&gpio5_base->oe); /* 128, 129, 156-159 */
writel(~GPIO4, &gpio6_base->oe); /* 164 */
/* set up dual-voltage GPIOs to 1.8V */
pbias_lite = readl(&t2_base->pbias_lite);
pbias_lite &= ~PBIASLITEVMODE1;
pbias_lite |= PBIASLITEPWRDNZ1;
writel(pbias_lite, &t2_base->pbias_lite);
if (get_cpu_family() == CPU_OMAP36XX)
writel(readl(CONTROL_WKUP_CTRL) | GPIO_IO_PWRDNZ,
CONTROL_WKUP_CTRL);
/* Set GPIOs */
writel(GPIO28, &gpio5_base->setdataout);
writel(GPIO4, &gpio6_base->setdataout);
/* make sure audio and BT chips are in powerdown state */
set_output_gpio(14, 0);
set_output_gpio(15, 0);
set_output_gpio(118, 0);
/* enable USB supply */
set_output_gpio(164, 1);
/* wifi needs a short pulse to enter powersave state */
set_output_gpio(23, 1);
udelay(5000);
gpio_direction_output(23, 0);
/* Enable battery backup capacitor (3.2V, 0.5mA charge current) */
twl4030_i2c_write_u8(TWL4030_CHIP_PM_RECEIVER,