Define platform data and setup GPIOs so that TI wl1251 wifi chip
and it's driver can function.
Signed-off-by: Grazvydas Ignotas <notasas@xxxxxxxxx>
---
I could have sent this earlier but it depended on the wifi tree,
hope this can still go in for -rc2, it's just platform data anyway.
arch/arm/mach-omap2/board-omap3pandora.c | 83 ++++++++++++++++++++++++++++++
1 files changed, 83 insertions(+), 0 deletions(-)
diff --git a/arch/arm/mach-omap2/board-omap3pandora.c b/arch/arm/mach-omap2/board-omap3pandora.c
index 395d049..8e164f1 100644
--- a/arch/arm/mach-omap2/board-omap3pandora.c
+++ b/arch/arm/mach-omap2/board-omap3pandora.c
@@ -29,6 +29,7 @@
#include <linux/input.h>
#include <linux/input/matrix_keypad.h>
#include <linux/gpio_keys.h>
+#include <linux/spi/wl12xx.h>
#include <asm/mach-types.h>
#include <asm/mach/arch.h>
@@ -46,6 +47,8 @@
#include "sdram-micron-mt46h32m32lf-6.h"
#include "hsmmc.h"
+#define PANDORA_WIFI_IRQ_GPIO 21
+#define PANDORA_WIFI_NRESET_GPIO 23
#define OMAP3_PANDORA_TS_GPIO 94
/* hardware debounce: (value + 1) * 31us */
@@ -248,6 +251,7 @@ static struct omap2_hsmmc_info omap3pandora_mmc[] = {
.wires = 4,
.gpio_cd = -EINVAL,
.gpio_wp = -EINVAL,
+ .ocr_mask = 0x80, /* MMC_VDD_165_195 */
},
{} /* Terminator */
};
@@ -255,12 +259,33 @@ static struct omap2_hsmmc_info omap3pandora_mmc[] = {
static int omap3pandora_twl_gpio_setup(struct device *dev,
unsigned gpio, unsigned ngpio)
{
+ int ret, gpio_32khz;
+
/* gpio + {0,1} is "mmc{0,1}_cd" (input/IRQ) */
omap3pandora_mmc[0].gpio_cd = gpio + 0;
omap3pandora_mmc[1].gpio_cd = gpio + 1;
omap2_hsmmc_init(omap3pandora_mmc);
+ /* gpio + 13 drives 32kHz buffer for wifi module */
+ gpio_32khz = gpio + 13;
+ ret = gpio_request(gpio_32khz, "wifi 32kHz");
+ if (ret < 0) {
+ pr_err("Cannot get GPIO line %d, ret=%d\n", gpio_32khz, ret);
+ goto fail;
+ }
+
+ ret = gpio_direction_output(gpio_32khz, 1);
+ if (ret < 0) {
+ pr_err("Cannot set GPIO line %d, ret=%d\n", gpio_32khz, ret);
+ goto fail_direction;
+ }
+
return 0;
+
+fail_direction:
+ gpio_free(gpio_32khz);
+fail:
+ return -ENODEV;
}
static struct twl4030_gpio_platform_data omap3pandora_gpio_data = {
@@ -539,10 +564,67 @@ static void __init omap3pandora_init_irq(void)
omap_gpio_init();
}
+static void pandora_wl1251_set_power(bool enable)
+{
+ /*
+ * Keep power always on until wl1251_sdio driver learns to re-init
+ * the chip after powering it down and back up.
+ */
+}
+
+static struct wl12xx_platform_data pandora_wl1251_pdata = {
+ .set_power = pandora_wl1251_set_power,
+ .use_eeprom = true,
+};
+
+static struct platform_device pandora_wl1251_data = {
+ .name = "wl1251_data",
+ .id = -1,
+ .dev = {
+ .platform_data = &pandora_wl1251_pdata,
+ },
+};
+
+static void pandora_wl1251_init(void)
+{
+ int ret;
+
+ ret = gpio_request(PANDORA_WIFI_IRQ_GPIO, "wl1251 irq");
+ if (ret < 0)
+ goto fail;
+
+ ret = gpio_direction_input(PANDORA_WIFI_IRQ_GPIO);
+ if (ret < 0)
+ goto fail_irq;
+
+ pandora_wl1251_pdata.irq = gpio_to_irq(PANDORA_WIFI_IRQ_GPIO);
+ if (pandora_wl1251_pdata.irq < 0)
+ goto fail_irq;
+
+ ret = gpio_request(PANDORA_WIFI_NRESET_GPIO, "wl1251 nreset");
+ if (ret < 0)
+ goto fail_irq;
+
+ /* start powered so that it probes with MMC subsystem */
+ ret = gpio_direction_output(PANDORA_WIFI_NRESET_GPIO, 1);
+ if (ret < 0)
+ goto fail_nreset;
+
+ return;
+
+fail_nreset:
+ gpio_free(PANDORA_WIFI_NRESET_GPIO);
+fail_irq:
+ gpio_free(PANDORA_WIFI_IRQ_GPIO);
+fail:
+ printk(KERN_ERR "wl1251 board initialisation failed\n");
+}
+
static struct platform_device *omap3pandora_devices[] __initdata = {
&pandora_leds_gpio,
&pandora_keys_gpio,
&pandora_dss_device,
+ &pandora_wl1251_data,
};
static const struct ehci_hcd_omap_platform_data ehci_pdata __initconst = {
@@ -575,6 +657,7 @@ static void __init omap3pandora_init(void)
{
omap3_mux_init(board_mux, OMAP_PACKAGE_CBB);
omap3pandora_i2c_init();
+ pandora_wl1251_init();
platform_add_devices(omap3pandora_devices,
ARRAY_SIZE(omap3pandora_devices));
omap_serial_init();
--
1.6.3.3
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