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Commit 4bff4a7e authored by Guennadi Liakhovetski's avatar Guennadi Liakhovetski Committed by Paul Mundt
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ARM: arch-shmobile: support SDHI card detection on mackerel, using a GPIO 



On sh7372 the card-detection pin of SDHI0 can also produce interrupts,
when configured as GPIO. Use this feature to power down SDHI0, when no
card is plugged in.

Signed-off-by: default avatarGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: default avatarPaul Mundt <lethal@linux-sh.org>
parent dce65a6a

arch/arm/mach-shmobile/board-mackerel.c

+20 −0
Original line number Diff line number Diff line
@@ -39,6 +39,7 @@ 
#include <linux/mtd/mtd.h>

#include <linux/mtd/partitions.h>

#include <linux/mtd/physmap.h>

#include <linux/pm_runtime.h>

#include <linux/smsc911x.h>

#include <linux/sh_intc.h>

#include <linux/tca6416_keypad.h>
@@ -913,6 +914,17 @@ static int slot_cn7_get_cd(struct platform_device *pdev) 
}



/* SDHI0 */

static irqreturn_t mackerel_sdhi0_gpio_cd(int irq, void *arg)

{

	struct device *dev = arg;

	struct sh_mobile_sdhi_info *info = dev->platform_data;

	struct tmio_mmc_data *pdata = info->pdata;



	tmio_mmc_cd_wakeup(pdata);



	return IRQ_HANDLED;

}



static struct sh_mobile_sdhi_info sdhi0_info = {

	.dma_slave_tx	= SHDMA_SLAVE_SDHI0_TX,

	.dma_slave_rx	= SHDMA_SLAVE_SDHI0_RX,
@@ -1296,6 +1308,7 @@ static void __init mackerel_init(void) 
{

	u32 srcr4;

	struct clk *clk;

	int ret;



	sh7372_pinmux_init();
@@ -1401,6 +1414,13 @@ static void __init mackerel_init(void) 
	gpio_request(GPIO_FN_SDHID0_1, NULL);

	gpio_request(GPIO_FN_SDHID0_0, NULL);



	ret = request_irq(evt2irq(0x3340), mackerel_sdhi0_gpio_cd,

			  IRQF_TRIGGER_FALLING, "sdhi0 cd", &sdhi0_device.dev);

	if (!ret)

		sdhi0_info.tmio_flags |= TMIO_MMC_HAS_COLD_CD;

	else

		pr_err("Cannot get IRQ #%d: %d\n", evt2irq(0x3340), ret);



#if !defined(CONFIG_MMC_SH_MMCIF) && !defined(CONFIG_MMC_SH_MMCIF_MODULE)

	/* enable SDHI1 */

	gpio_request(GPIO_FN_SDHICMD1, NULL);