[ARM] pxa/em-x270: add libertas device registration

Signed-off-by: Mike Rapoport <mike@compulab.co.il>
Signed-off-by: Eric Miao <eric.miao@marvell.com>

1 files changed, 78 insertions, 8 deletions

diff --git a/arch/arm/mach-pxa/em-x270.c b/arch/arm/mach-pxa/em-x270.c
index 920dfb8d36da..67611dadb44e 100644
--- a/arch/arm/mach-pxa/em-x270.c
+++ b/arch/arm/mach-pxa/em-x270.c
@@ -25,8 +25,10 @@
 #include <linux/regulator/machine.h>
 #include <linux/spi/spi.h>
 #include <linux/spi/tdo24m.h>
+#include <linux/spi/libertas_spi.h>
 #include <linux/power_supply.h>
 #include <linux/apm-emulation.h>
+#include <linux/delay.h>
 
 #include <media/soc_camera.h>
 
@@ -62,6 +64,8 @@
 #define GPIO93_CAM_RESET        (93)
 #define GPIO41_ETHIRQ           (41)
 #define EM_X270_ETHIRQ          IRQ_GPIO(GPIO41_ETHIRQ)
+#define GPIO115_WLAN_PWEN       (115)
+#define GPIO19_WLAN_STRAP       (19)
 
 static int mmc_cd;
 static int nand_rb;
@@ -159,8 +163,8 @@ static unsigned long common_pin_config[] = {
         GPIO57_SSP1_TXD,
 
         /* SSP2 */
-        GPIO19_SSP2_SCLK,
-        GPIO14_SSP2_SFRM,
+        GPIO19_GPIO,    /* SSP2 clock is used as GPIO for Libertas pin-strap */
+        GPIO14_GPIO,
         GPIO89_SSP2_TXD,
         GPIO88_SSP2_RXD,
 
@@ -648,20 +652,86 @@ static struct tdo24m_platform_data em_x270_tdo24m_pdata = {
         .model = TDO35S,
 };
 
+static struct pxa2xx_spi_master em_x270_spi_2_info = {
+        .num_chipselect = 1,
+        .enable_dma     = 1,
+};
+
+static struct pxa2xx_spi_chip em_x270_libertas_chip = {
+        .rx_threshold   = 1,
+        .tx_threshold   = 1,
+        .timeout        = 1000,
+};
+
+static unsigned long em_x270_libertas_pin_config[] = {
+        /* SSP2 */
+        GPIO19_SSP2_SCLK,
+        GPIO14_GPIO,
+        GPIO89_SSP2_TXD,
+        GPIO88_SSP2_RXD,
+};
+
+static int em_x270_libertas_setup(struct spi_device *spi)
+{
+        int err = gpio_request(GPIO115_WLAN_PWEN, "WLAN PWEN");
+        if (err)
+                return err;
+
+        gpio_direction_output(GPIO19_WLAN_STRAP, 1);
+        mdelay(100);
+
+        pxa2xx_mfp_config(ARRAY_AND_SIZE(em_x270_libertas_pin_config));
+
+        gpio_direction_output(GPIO115_WLAN_PWEN, 0);
+        mdelay(100);
+        gpio_set_value(GPIO115_WLAN_PWEN, 1);
+        mdelay(100);
+
+        spi->bits_per_word = 16;
+        spi_setup(spi);
+
+        return 0;
+}
+
+static int em_x270_libertas_teardown(struct spi_device *spi)
+{
+        gpio_set_value(GPIO115_WLAN_PWEN, 0);
+        gpio_free(GPIO115_WLAN_PWEN);
+
+        return 0;
+}
+
+struct libertas_spi_platform_data em_x270_libertas_pdata = {
+        .use_dummy_writes       = 1,
+        .gpio_cs                = 14,
+        .setup                  = em_x270_libertas_setup,
+        .teardown               = em_x270_libertas_teardown,
+};
+
 static struct spi_board_info em_x270_spi_devices[] __initdata = {
         {
-                .modalias = "tdo24m",
-                .max_speed_hz = 1000000,
-                .bus_num = 1,
-                .chip_select = 0,
-                .controller_data = &em_x270_tdo24m_chip,
-                .platform_data = &em_x270_tdo24m_pdata,
+                .modalias               = "tdo24m",
+                .max_speed_hz           = 1000000,
+                .bus_num                = 1,
+                .chip_select            = 0,
+                .controller_data        = &em_x270_tdo24m_chip,
+                .platform_data          = &em_x270_tdo24m_pdata,
+        },
+        {
+                .modalias               = "libertas_spi",
+                .max_speed_hz           = 13000000,
+                .bus_num                = 2,
+                .irq                    = IRQ_GPIO(116),
+                .chip_select            = 0,
+                .controller_data        = &em_x270_libertas_chip,
+                .platform_data          = &em_x270_libertas_pdata,
         },
 };
 
 static void __init em_x270_init_spi(void)
 {
         pxa2xx_set_spi_info(1, &em_x270_spi_info);
+        pxa2xx_set_spi_info(2, &em_x270_spi_2_info);
         spi_register_board_info(ARRAY_AND_SIZE(em_x270_spi_devices));
 }
 #else