Commit a2099e49 authored by Mike Rapoport's avatar Mike Rapoport Committed by Eric Miao
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[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: default avatarMike Rapoport <mike@compulab.co.il>
Signed-off-by: default avatarEric Miao <eric.y.miao@gmail.com>
parent 100a1d25

arch/arm/mach-pxa/cm-x270.c

+108 −2
Original line number Diff line number Diff line
@@ -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();

}