[ARM] pxa/cm-x270: add libertas device registration
v2 changes: - use gpio_to_irq instead of IRQ_GPIO - check gpio_direction_output return value to be on the safe side :) Signed-off-by: Mike Rapoport <mike@compulab.co.il> Signed-off-by: Eric Miao <eric.y.miao@gmail.com>
This commit is contained in:
Mike Rapoport
Eric Miao
parent
100a1d250d
commit
a2099e49f4
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@ -13,13 +13,18 @@
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#include <linux/sysdev.h>
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#include <linux/irq.h>
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#include <linux/gpio.h>
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#include <linux/delay.h>
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#include <linux/rtc-v3020.h>
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#include <video/mbxfb.h>
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#include <linux/spi/spi.h>
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#include <linux/spi/libertas_spi.h>
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#include <mach/pxa27x.h>
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#include <mach/ohci.h>
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#include <mach/mmc.h>
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#include <mach/pxa2xx_spi.h>
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#include "generic.h"
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@ -34,6 +39,10 @@
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/* MMC power enable */
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#define GPIO105_MMC_POWER (105)
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/* WLAN GPIOS */
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#define GPIO19_WLAN_STRAP (19)
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#define GPIO102_WLAN_RST (102)
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static unsigned long cmx270_pin_config[] = {
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/* AC'97 */
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GPIO28_AC97_BITCLK,
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@ -94,8 +103,8 @@ static unsigned long cmx270_pin_config[] = {
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GPIO26_SSP1_RXD,
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/* SSP2 */
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GPIO19_SSP2_SCLK,
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GPIO14_SSP2_SFRM,
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GPIO19_GPIO, /* SSP2 clock is used as GPIO for Libertas pin-strap */
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GPIO14_GPIO,
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GPIO87_SSP2_TXD,
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GPIO88_SSP2_RXD,
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@ -123,6 +132,7 @@ static unsigned long cmx270_pin_config[] = {
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GPIO0_GPIO | WAKEUP_ON_EDGE_BOTH,
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GPIO105_GPIO | MFP_LPM_DRIVE_HIGH, /* MMC/SD power */
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GPIO53_GPIO, /* PC card reset */
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GPIO102_GPIO, /* WLAN reset */
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/* NAND controls */
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GPIO11_GPIO | MFP_LPM_DRIVE_HIGH, /* NAND CE# */
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@ -131,6 +141,7 @@ static unsigned long cmx270_pin_config[] = {
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/* interrupts */
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GPIO10_GPIO, /* DM9000 interrupt */
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GPIO83_GPIO, /* MMC card detect */
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GPIO95_GPIO, /* WLAN interrupt */
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};
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/* V3020 RTC */
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@ -287,6 +298,100 @@ static void __init cmx270_init_mmc(void)
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static inline void cmx270_init_mmc(void) {}
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#endif
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#if defined(CONFIG_SPI_PXA2XX) || defined(CONFIG_SPI_PXA2XX_MODULE)
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static struct pxa2xx_spi_master cm_x270_spi_info = {
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.num_chipselect = 1,
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.enable_dma = 1,
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};
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static struct pxa2xx_spi_chip cm_x270_libertas_chip = {
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.rx_threshold = 1,
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.tx_threshold = 1,
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.timeout = 1000,
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.gpio_cs = 14,
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};
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static unsigned long cm_x270_libertas_pin_config[] = {
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/* SSP2 */
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GPIO19_SSP2_SCLK,
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GPIO14_GPIO,
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GPIO87_SSP2_TXD,
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GPIO88_SSP2_RXD,
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};
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static int cm_x270_libertas_setup(struct spi_device *spi)
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{
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int err = gpio_request(GPIO19_WLAN_STRAP, "WLAN STRAP");
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if (err)
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return err;
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err = gpio_request(GPIO102_WLAN_RST, "WLAN RST");
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if (err)
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goto err_free_strap;
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err = gpio_direction_output(GPIO102_WLAN_RST, 0);
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if (err)
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goto err_free_strap;
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msleep(100);
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err = gpio_direction_output(GPIO19_WLAN_STRAP, 1);
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if (err)
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goto err_free_strap;
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msleep(100);
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pxa2xx_mfp_config(ARRAY_AND_SIZE(cm_x270_libertas_pin_config));
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gpio_set_value(GPIO102_WLAN_RST, 1);
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msleep(100);
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spi->bits_per_word = 16;
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spi_setup(spi);
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return 0;
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err_free_strap:
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gpio_free(GPIO19_WLAN_STRAP);
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return err;
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}
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static int cm_x270_libertas_teardown(struct spi_device *spi)
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{
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gpio_set_value(GPIO102_WLAN_RST, 0);
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gpio_free(GPIO102_WLAN_RST);
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gpio_free(GPIO19_WLAN_STRAP);
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return 0;
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}
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struct libertas_spi_platform_data cm_x270_libertas_pdata = {
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.use_dummy_writes = 1,
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.setup = cm_x270_libertas_setup,
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.teardown = cm_x270_libertas_teardown,
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};
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static struct spi_board_info cm_x270_spi_devices[] __initdata = {
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{
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.modalias = "libertas_spi",
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.max_speed_hz = 13000000,
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.bus_num = 2,
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.irq = gpio_to_irq(95),
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.chip_select = 0,
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.controller_data = &cm_x270_libertas_chip,
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.platform_data = &cm_x270_libertas_pdata,
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},
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};
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static void __init cmx270_init_spi(void)
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{
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pxa2xx_set_spi_info(2, &cm_x270_spi_info);
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spi_register_board_info(ARRAY_AND_SIZE(cm_x270_spi_devices));
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}
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#else
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static inline void cmx270_init_spi(void) {}
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#endif
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void __init cmx270_init(void)
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{
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pxa2xx_mfp_config(ARRAY_AND_SIZE(cmx270_pin_config));
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@ -299,4 +404,5 @@ void __init cmx270_init(void)
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cmx270_init_mmc();
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cmx270_init_ohci();
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cmx270_init_2700G();
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cmx270_init_spi();
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}
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