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>
diff --git a/drivers/mmc/host/mvsdio.c b/drivers/mmc/host/mvsdio.c
index f8dd361..c6dc8fd 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 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 @@
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 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 @@
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 @@
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 @@
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);