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Commit 58e300af authored by Lars-Peter Clausen's avatar Lars-Peter Clausen Committed by Chris Ball
Browse files

mmc: jz4740: Use slot-gpio helpers 



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: default avatarLars-Peter Clausen <lars@metafoo.de>
Signed-off-by: default avatarChris Ball <cjb@laptop.org>
parent 5d5c0350

drivers/mmc/host/jz4740_mmc.c

+23 −90
Original line number Diff line number Diff line
@@ -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 (gpio_is_valid(pdata->gpio_card_detect)) {

		ret = mmc_gpio_request_cd(mmc, pdata->gpio_card_detect);

		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_read_only)) {

		ret = mmc_gpio_request_ro(mmc, pdata->gpio_read_only);

		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);

	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));