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authorThomas Petazzoni <thomas.petazzoni@free-electrons.com>2013-01-16 14:13:57 +0100
committerChris Ball <cjb@laptop.org>2013-02-11 13:28:53 -0500
commit3724482d4ce4790d4534bcecebfda2c7133244c7 (patch)
tree1d0603eecf298c667b063c7ce9bcabc0140085c7 /drivers/mmc
parenta043859043042e8bc6f68b40782e3b8c9d10a28d (diff)
mmc: mvsdio: use slot-gpio infrastructure for write protect gpio
The MMC core subsystem provides in drivers/mmc/core/slot-gpio.c a nice set of helper functions to simplify the management of the write protect GPIO in MMC host drivers. This patch migrates the mvsdio driver to using those helpers, which will make the ->probe() code simpler, and therefore ease the process of adding a Device Tree binding for this driver. Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Signed-off-by: Andrew Lunn <andrew@lunn.ch> Tested-by: Stefan Peter <s.peter@mpl.ch> Tested-by: Florian Fainelli <florian@openwrt.org> Signed-off-by: Jason Cooper <jason@lakedaemon.net> Signed-off-by: Chris Ball <cjb@laptop.org>
Diffstat (limited to 'drivers/mmc')
-rw-r--r--drivers/mmc/host/mvsdio.c30
1 files changed, 5 insertions, 25 deletions
diff --git a/drivers/mmc/host/mvsdio.c b/drivers/mmc/host/mvsdio.c
index f8dd36102949..c6dc8fd696ab 100644
--- a/drivers/mmc/host/mvsdio.c
+++ b/drivers/mmc/host/mvsdio.c
@@ -22,6 +22,7 @@
#include <linux/clk.h>
#include <linux/gpio.h>
#include <linux/mmc/host.h>
+#include <linux/mmc/slot-gpio.h>
#include <asm/sizes.h>
#include <asm/unaligned.h>
@@ -52,7 +53,6 @@ struct mvsd_host {
struct device *dev;
struct clk *clk;
int gpio_card_detect;
- int gpio_write_protect;
};
#define mvsd_write(offs, val) writel(val, iobase + (offs))
@@ -564,20 +564,6 @@ static void mvsd_enable_sdio_irq(struct mmc_host *mmc, int enable)
spin_unlock_irqrestore(&host->lock, flags);
}
-static int mvsd_get_ro(struct mmc_host *mmc)
-{
- struct mvsd_host *host = mmc_priv(mmc);
-
- if (host->gpio_write_protect)
- return gpio_get_value(host->gpio_write_protect);
-
- /*
- * Board doesn't support read only detection; let the mmc core
- * decide what to do.
- */
- return -ENOSYS;
-}
-
static void mvsd_power_up(struct mvsd_host *host)
{
void __iomem *iobase = host->base;
@@ -674,7 +660,7 @@ static void mvsd_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
static const struct mmc_host_ops mvsd_ops = {
.request = mvsd_request,
- .get_ro = mvsd_get_ro,
+ .get_ro = mmc_gpio_get_ro,
.set_ios = mvsd_set_ios,
.enable_sdio_irq = mvsd_enable_sdio_irq,
};
@@ -793,15 +779,7 @@ static int __init mvsd_probe(struct platform_device *pdev)
if (!host->gpio_card_detect)
mmc->caps |= MMC_CAP_NEEDS_POLL;
- if (mvsd_data->gpio_write_protect) {
- ret = devm_gpio_request_one(&pdev->dev,
- mvsd_data->gpio_write_protect,
- GPIOF_IN, DRIVER_NAME " wp");
- if (ret == 0) {
- host->gpio_write_protect =
- mvsd_data->gpio_write_protect;
- }
- }
+ mmc_gpio_request_ro(mmc, mvsd_data->gpio_write_protect);
setup_timer(&host->timer, mvsd_timeout_timer, (unsigned long)host);
platform_set_drvdata(pdev, mmc);
@@ -820,6 +798,7 @@ static int __init mvsd_probe(struct platform_device *pdev)
out:
if (mmc) {
+ mmc_gpio_free_ro(mmc);
if (!IS_ERR(host->clk))
clk_disable_unprepare(host->clk);
mmc_free_host(mmc);
@@ -834,6 +813,7 @@ static int __exit mvsd_remove(struct platform_device *pdev)
struct mvsd_host *host = mmc_priv(mmc);
+ mmc_gpio_free_ro(mmc);
mmc_remove_host(mmc);
del_timer_sync(&host->timer);
mvsd_power_down(host);