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

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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 2009-08-03 12:07:52 +03:00 committed by Eric Miao
parent 100a1d250d
commit a2099e49f4
1 changed files with 108 additions and 2 deletions
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110
arch/arm/mach-pxa/cm-x270.c
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@ -13,13 +13,18 @@
#include <linux/sysdev.h>
#include <linux/irq.h>
#include <linux/gpio.h>
#include <linux/delay.h>
#include <linux/rtc-v3020.h>
#include <video/mbxfb.h>
#include <linux/spi/spi.h>
#include <linux/spi/libertas_spi.h>
#include <mach/pxa27x.h>
#include <mach/ohci.h>
#include <mach/mmc.h>
#include <mach/pxa2xx_spi.h>
#include "generic.h"
@ -34,6 +39,10 @@
/* MMC power enable */
#define GPIO105_MMC_POWER (105)
/* WLAN GPIOS */
#define GPIO19_WLAN_STRAP (19)
#define GPIO102_WLAN_RST (102)
static unsigned long cmx270_pin_config[] = {
/* AC'97 */
GPIO28_AC97_BITCLK,
@ -94,8 +103,8 @@ static unsigned long cmx270_pin_config[] = {
GPIO26_SSP1_RXD,
/* SSP2 */
GPIO19_SSP2_SCLK,
GPIO14_SSP2_SFRM,
GPIO19_GPIO, /* SSP2 clock is used as GPIO for Libertas pin-strap */
GPIO14_GPIO,
GPIO87_SSP2_TXD,
GPIO88_SSP2_RXD,
@ -123,6 +132,7 @@ static unsigned long cmx270_pin_config[] = {
GPIO0_GPIO | WAKEUP_ON_EDGE_BOTH,
GPIO105_GPIO | MFP_LPM_DRIVE_HIGH, /* MMC/SD power */
GPIO53_GPIO, /* PC card reset */
GPIO102_GPIO, /* WLAN reset */
/* NAND controls */
GPIO11_GPIO | MFP_LPM_DRIVE_HIGH, /* NAND CE# */
@ -131,6 +141,7 @@ static unsigned long cmx270_pin_config[] = {
/* interrupts */
GPIO10_GPIO, /* DM9000 interrupt */
GPIO83_GPIO, /* MMC card detect */
GPIO95_GPIO, /* WLAN interrupt */
};
/* V3020 RTC */
@ -287,6 +298,100 @@ static void __init cmx270_init_mmc(void)
static inline void cmx270_init_mmc(void) {}
#endif
#if defined(CONFIG_SPI_PXA2XX) || defined(CONFIG_SPI_PXA2XX_MODULE)
static struct pxa2xx_spi_master cm_x270_spi_info = {
.num_chipselect = 1,
.enable_dma = 1,
};
static struct pxa2xx_spi_chip cm_x270_libertas_chip = {
.rx_threshold = 1,
.tx_threshold = 1,
.timeout = 1000,
.gpio_cs = 14,
};
static unsigned long cm_x270_libertas_pin_config[] = {
/* SSP2 */
GPIO19_SSP2_SCLK,
GPIO14_GPIO,
GPIO87_SSP2_TXD,
GPIO88_SSP2_RXD,
};
static int cm_x270_libertas_setup(struct spi_device *spi)
{
int err = gpio_request(GPIO19_WLAN_STRAP, "WLAN STRAP");
if (err)
return err;
err = gpio_request(GPIO102_WLAN_RST, "WLAN RST");
if (err)
goto err_free_strap;
err = gpio_direction_output(GPIO102_WLAN_RST, 0);
if (err)
goto err_free_strap;
msleep(100);
err = gpio_direction_output(GPIO19_WLAN_STRAP, 1);
if (err)
goto err_free_strap;
msleep(100);
pxa2xx_mfp_config(ARRAY_AND_SIZE(cm_x270_libertas_pin_config));
gpio_set_value(GPIO102_WLAN_RST, 1);
msleep(100);
spi->bits_per_word = 16;
spi_setup(spi);
return 0;
err_free_strap:
gpio_free(GPIO19_WLAN_STRAP);
return err;
}
static int cm_x270_libertas_teardown(struct spi_device *spi)
{
gpio_set_value(GPIO102_WLAN_RST, 0);
gpio_free(GPIO102_WLAN_RST);
gpio_free(GPIO19_WLAN_STRAP);
return 0;
}
struct libertas_spi_platform_data cm_x270_libertas_pdata = {
.use_dummy_writes = 1,
.setup = cm_x270_libertas_setup,
.teardown = cm_x270_libertas_teardown,
};
static struct spi_board_info cm_x270_spi_devices[] __initdata = {
{
.modalias = "libertas_spi",
.max_speed_hz = 13000000,
.bus_num = 2,
.irq = gpio_to_irq(95),
.chip_select = 0,
.controller_data = &cm_x270_libertas_chip,
.platform_data = &cm_x270_libertas_pdata,
},
};
static void __init cmx270_init_spi(void)
{
pxa2xx_set_spi_info(2, &cm_x270_spi_info);
spi_register_board_info(ARRAY_AND_SIZE(cm_x270_spi_devices));
}
#else
static inline void cmx270_init_spi(void) {}
#endif
void __init cmx270_init(void)
{
pxa2xx_mfp_config(ARRAY_AND_SIZE(cmx270_pin_config));
@ -299,4 +404,5 @@ void __init cmx270_init(void)
cmx270_init_mmc();
cmx270_init_ohci();
cmx270_init_2700G();
cmx270_init_spi();
}