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mmc: jz4740: Use slot-gpio helpers

Browse source 
Use the slot-gpio helpers to handle the write protect and card detect
GPIO pins instead of re-implementing the same functionality in the driver.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Chris Ball <cjb@laptop.org>
This commit is contained in:
Lars-Peter Clausen 2013-06-09 21:10:04 +02:00 committed by Chris Ball
parent 5d5c0350fc
commit 58e300af81
1 changed files with 24 additions and 91 deletions
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115
drivers/mmc/host/jz4740_mmc.c
View file

@ -14,6 +14,7 @@
*/
#include <linux/mmc/host.h>
#include <linux/mmc/slot-gpio.h>
#include <linux/err.h>
#include <linux/io.h>
#include <linux/irq.h>
@ -653,35 +654,6 @@ static void jz4740_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
}
}
static int jz4740_mmc_get_ro(struct mmc_host *mmc)
{
struct jz4740_mmc_host *host = mmc_priv(mmc);
if (!gpio_is_valid(host->pdata->gpio_read_only))
return -ENOSYS;
return gpio_get_value(host->pdata->gpio_read_only) ^
host->pdata->read_only_active_low;
}
static int jz4740_mmc_get_cd(struct mmc_host *mmc)
{
struct jz4740_mmc_host *host = mmc_priv(mmc);
if (!gpio_is_valid(host->pdata->gpio_card_detect))
return -ENOSYS;
return gpio_get_value(host->pdata->gpio_card_detect) ^
host->pdata->card_detect_active_low;
}
static irqreturn_t jz4740_mmc_card_detect_irq(int irq, void *devid)
{
struct jz4740_mmc_host *host = devid;
mmc_detect_change(host->mmc, HZ / 2);
return IRQ_HANDLED;
}
static void jz4740_mmc_enable_sdio_irq(struct mmc_host *mmc, int enable)
{
struct jz4740_mmc_host *host = mmc_priv(mmc);
@ -691,8 +663,8 @@ static void jz4740_mmc_enable_sdio_irq(struct mmc_host *mmc, int enable)
static const struct mmc_host_ops jz4740_mmc_ops = {
.request = jz4740_mmc_request,
.set_ios = jz4740_mmc_set_ios,
.get_ro = jz4740_mmc_get_ro,
.get_cd = jz4740_mmc_get_cd,
.get_ro = mmc_gpio_get_ro,
.get_cd = mmc_gpio_get_cd,
.enable_sdio_irq = jz4740_mmc_enable_sdio_irq,
};
@ -727,58 +699,34 @@ static int jz4740_mmc_request_gpio(struct device *dev, int gpio,
return 0;
}
static int jz4740_mmc_request_gpios(struct platform_device *pdev)
static int jz4740_mmc_request_gpios(struct mmc_host *mmc,
struct platform_device *pdev)
{
int ret;
struct jz4740_mmc_platform_data *pdata = pdev->dev.platform_data;
int ret = 0;
if (!pdata)
return 0;
ret = jz4740_mmc_request_gpio(&pdev->dev, pdata->gpio_card_detect,
"MMC detect change", false, 0);
if (ret)
goto err;
if (!pdata->card_detect_active_low)
mmc->caps2 |= MMC_CAP2_CD_ACTIVE_HIGH;
if (!pdata->read_only_active_low)
mmc->caps2 |= MMC_CAP2_RO_ACTIVE_HIGH;
ret = jz4740_mmc_request_gpio(&pdev->dev, pdata->gpio_read_only,
"MMC read only", false, 0);
if (ret)
goto err_free_gpio_card_detect;
ret = jz4740_mmc_request_gpio(&pdev->dev, pdata->gpio_power,
"MMC read only", true, pdata->power_active_low);
if (ret)
goto err_free_gpio_read_only;
return 0;
err_free_gpio_read_only:
if (gpio_is_valid(pdata->gpio_read_only))
gpio_free(pdata->gpio_read_only);
err_free_gpio_card_detect:
if (gpio_is_valid(pdata->gpio_card_detect))
gpio_free(pdata->gpio_card_detect);
err:
return ret;
}
static int jz4740_mmc_request_cd_irq(struct platform_device *pdev,
struct jz4740_mmc_host *host)
{
struct jz4740_mmc_platform_data *pdata = pdev->dev.platform_data;
if (!gpio_is_valid(pdata->gpio_card_detect))
return 0;
host->card_detect_irq = gpio_to_irq(pdata->gpio_card_detect);
if (host->card_detect_irq < 0) {
dev_warn(&pdev->dev, "Failed to get card detect irq\n");
return 0;
if (gpio_is_valid(pdata->gpio_card_detect)) {
ret = mmc_gpio_request_cd(mmc, pdata->gpio_card_detect);
if (ret)
return ret;
}
return request_irq(host->card_detect_irq, jz4740_mmc_card_detect_irq,
IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
"MMC card detect", host);
if (gpio_is_valid(pdata->gpio_read_only)) {
ret = mmc_gpio_request_ro(mmc, pdata->gpio_read_only);
if (ret)
return ret;
}
return jz4740_mmc_request_gpio(&pdev->dev, pdata->gpio_power,
"MMC read only", true, pdata->power_active_low);
}
static void jz4740_mmc_free_gpios(struct platform_device *pdev)
@ -790,10 +738,6 @@ static void jz4740_mmc_free_gpios(struct platform_device *pdev)
if (gpio_is_valid(pdata->gpio_power))
gpio_free(pdata->gpio_power);
if (gpio_is_valid(pdata->gpio_read_only))
gpio_free(pdata->gpio_read_only);
if (gpio_is_valid(pdata->gpio_card_detect))
gpio_free(pdata->gpio_card_detect);
}
static inline size_t jz4740_mmc_num_pins(struct jz4740_mmc_host *host)
@ -865,7 +809,7 @@ static int jz4740_mmc_probe(struct platform_device* pdev)
goto err_iounmap;
}
ret = jz4740_mmc_request_gpios(pdev);
ret = jz4740_mmc_request_gpios(mmc, pdev);
if (ret)
goto err_gpio_bulk_free;
@ -888,17 +832,11 @@ static int jz4740_mmc_probe(struct platform_device* pdev)
spin_lock_init(&host->lock);
host->irq_mask = 0xffff;
ret = jz4740_mmc_request_cd_irq(pdev, host);
if (ret) {
dev_err(&pdev->dev, "Failed to request card detect irq\n");
goto err_free_gpios;
}
ret = request_threaded_irq(host->irq, jz_mmc_irq, jz_mmc_irq_worker, 0,
dev_name(&pdev->dev), host);
if (ret) {
dev_err(&pdev->dev, "Failed to request irq: %d\n", ret);
goto err_free_card_detect_irq;
goto err_free_gpios;
}
jz4740_mmc_reset(host);
@ -921,9 +859,6 @@ static int jz4740_mmc_probe(struct platform_device* pdev)
err_free_irq:
free_irq(host->irq, host);
err_free_card_detect_irq:
if (host->card_detect_irq >= 0)
free_irq(host->card_detect_irq, host);
err_free_gpios:
jz4740_mmc_free_gpios(pdev);
err_gpio_bulk_free:
@ -951,8 +886,6 @@ static int jz4740_mmc_remove(struct platform_device *pdev)
mmc_remove_host(host->mmc);
free_irq(host->irq, host);
if (host->card_detect_irq >= 0)
free_irq(host->card_detect_irq, host);
jz4740_mmc_free_gpios(pdev);
jz_gpio_bulk_free(jz4740_mmc_pins, jz4740_mmc_num_pins(host));