[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>

diff --git a/arch/arm/mach-pxa/em-x270.c b/arch/arm/mach-pxa/em-x270.c
index 920dfb8..67611da 100644 (file)
--- 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