redonkable/remarkable-linux
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mmc: sh_mmcif: support generic card-detection

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Extend the sh_mmcif driver to support GPIO card detection, provided by the
slot function module. The original .get_cd() platform callback is also
preserved for now.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Chris Ball <cjb@laptop.org>
This commit is contained in:
Guennadi Liakhovetski 2012-06-14 14:24:35 +02:00 committed by Chris Ball
parent d9adcc1286
commit e480606ad4
2 changed files with 20 additions and 0 deletions
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18
drivers/mmc/host/sh_mmcif.c
View file

@ -54,6 +54,7 @@
#include <linux/mmc/mmc.h>
#include <linux/mmc/sdio.h>
#include <linux/mmc/sh_mmcif.h>
#include <linux/mmc/slot-gpio.h>
#include <linux/mod_devicetable.h>
#include <linux/pagemap.h>
#include <linux/platform_device.h>
@ -1000,6 +1001,10 @@ static int sh_mmcif_get_cd(struct mmc_host *mmc)
{
struct sh_mmcif_host *host = mmc_priv(mmc);
struct sh_mmcif_plat_data *p = host->pd->dev.platform_data;
int ret = mmc_gpio_get_cd(mmc);
if (ret >= 0)
return ret;
if (!p || !p->get_cd)
return -ENOSYS;
@ -1372,6 +1377,12 @@ static int __devinit sh_mmcif_probe(struct platform_device *pdev)
goto ereqirq1;
}
if (pd && pd->use_cd_gpio) {
ret = mmc_gpio_request_cd(mmc, pd->cd_gpio);
if (ret < 0)
goto erqcd;
}
clk_disable(host->hclk);
ret = mmc_add_host(mmc);
if (ret < 0)
@ -1385,6 +1396,9 @@ static int __devinit sh_mmcif_probe(struct platform_device *pdev)
return ret;
emmcaddh:
if (pd && pd->use_cd_gpio)
mmc_gpio_free_cd(mmc);
erqcd:
free_irq(irq[1], host);
ereqirq1:
free_irq(irq[0], host);
@ -1405,6 +1419,7 @@ ealloch:
static int __devexit sh_mmcif_remove(struct platform_device *pdev)
{
struct sh_mmcif_host *host = platform_get_drvdata(pdev);
struct sh_mmcif_plat_data *pd = pdev->dev.platform_data;
int irq[2];
host->dying = true;
@ -1413,6 +1428,9 @@ static int __devexit sh_mmcif_remove(struct platform_device *pdev)
dev_pm_qos_hide_latency_limit(&pdev->dev);
if (pd && pd->use_cd_gpio)
mmc_gpio_free_cd(host->mmc);
mmc_remove_host(host->mmc);
sh_mmcif_writel(host->addr, MMCIF_CE_INT_MASK, MASK_ALL);

2
include/linux/mmc/sh_mmcif.h
View file

@ -44,6 +44,8 @@ struct sh_mmcif_plat_data {
struct sh_mmcif_dma *dma; /* Deprecated. Instead */
unsigned int slave_id_tx; /* use embedded slave_id_[tr]x */
unsigned int slave_id_rx;
bool use_cd_gpio : 1;
unsigned int cd_gpio;
u8 sup_pclk; /* 1 :SH7757, 0: SH7724/SH7372 */
unsigned long caps;
u32 ocr;