mirror of https://gitee.com/openkylin/linux.git
ALSA: atmel: convert AC97c driver to GPIO descriptor API
Convert the driver to use GPIO descriptor API. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Andy Shevchenko
Takashi Iwai
parent
b84e843644
commit
5f10e84934
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@ -12,16 +12,15 @@
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#include <linux/bitmap.h>
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#include <linux/device.h>
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#include <linux/atmel_pdc.h>
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#include <linux/gpio/consumer.h>
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/mutex.h>
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#include <linux/gpio.h>
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#include <linux/types.h>
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#include <linux/io.h>
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#include <linux/of.h>
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#include <linux/of_gpio.h>
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#include <linux/of_device.h>
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#include <sound/core.h>
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@ -29,7 +28,6 @@
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#include <sound/pcm.h>
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#include <sound/pcm_params.h>
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#include <sound/ac97_codec.h>
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#include <sound/atmel-ac97c.h>
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#include <sound/memalloc.h>
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#include "ac97c.h"
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@ -56,7 +54,7 @@ struct atmel_ac97c {
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void __iomem *regs;
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int irq;
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int opened;
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int reset_pin;
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struct gpio_desc *reset_pin;
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};
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#define get_chip(card) ((struct atmel_ac97c *)(card)->private_data)
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@ -700,11 +698,11 @@ static void atmel_ac97c_reset(struct atmel_ac97c *chip)
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ac97c_writel(chip, CAMR, 0);
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ac97c_writel(chip, COMR, 0);
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if (gpio_is_valid(chip->reset_pin)) {
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gpio_set_value(chip->reset_pin, 0);
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if (!IS_ERR(chip->reset_pin)) {
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gpiod_set_value(chip->reset_pin, 0);
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/* AC97 v2.2 specifications says minimum 1 us. */
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udelay(2);
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gpio_set_value(chip->reset_pin, 1);
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gpiod_set_value(chip->reset_pin, 1);
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} else {
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ac97c_writel(chip, MR, AC97C_MR_WRST | AC97C_MR_ENA);
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udelay(2);
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@ -712,45 +710,18 @@ static void atmel_ac97c_reset(struct atmel_ac97c *chip)
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}
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}
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#ifdef CONFIG_OF
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static const struct of_device_id atmel_ac97c_dt_ids[] = {
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{ .compatible = "atmel,at91sam9263-ac97c", },
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{ }
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};
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MODULE_DEVICE_TABLE(of, atmel_ac97c_dt_ids);
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static struct ac97c_platform_data *atmel_ac97c_probe_dt(struct device *dev)
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{
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struct ac97c_platform_data *pdata;
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struct device_node *node = dev->of_node;
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if (!node) {
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dev_err(dev, "Device does not have associated DT data\n");
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return ERR_PTR(-EINVAL);
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}
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pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
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if (!pdata)
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return ERR_PTR(-ENOMEM);
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pdata->reset_pin = of_get_named_gpio(dev->of_node, "ac97-gpios", 2);
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return pdata;
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}
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#else
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static struct ac97c_platform_data *atmel_ac97c_probe_dt(struct device *dev)
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{
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dev_err(dev, "no platform data defined\n");
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return ERR_PTR(-ENXIO);
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}
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#endif
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static int atmel_ac97c_probe(struct platform_device *pdev)
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{
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struct device *dev = &pdev->dev;
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struct snd_card *card;
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struct atmel_ac97c *chip;
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struct resource *regs;
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struct ac97c_platform_data *pdata;
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struct clk *pclk;
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static struct snd_ac97_bus_ops ops = {
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.write = atmel_ac97c_write,
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@ -765,13 +736,6 @@ static int atmel_ac97c_probe(struct platform_device *pdev)
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return -ENXIO;
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}
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pdata = dev_get_platdata(&pdev->dev);
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if (!pdata) {
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pdata = atmel_ac97c_probe_dt(&pdev->dev);
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if (IS_ERR(pdata))
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return PTR_ERR(pdata);
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}
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irq = platform_get_irq(pdev, 0);
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if (irq < 0) {
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dev_dbg(&pdev->dev, "could not get irq: %d\n", irq);
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@ -819,17 +783,9 @@ static int atmel_ac97c_probe(struct platform_device *pdev)
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goto err_ioremap;
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}
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if (gpio_is_valid(pdata->reset_pin)) {
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if (gpio_request(pdata->reset_pin, "reset_pin")) {
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dev_dbg(&pdev->dev, "reset pin not available\n");
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chip->reset_pin = -ENODEV;
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} else {
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gpio_direction_output(pdata->reset_pin, 1);
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chip->reset_pin = pdata->reset_pin;
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}
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} else {
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chip->reset_pin = -EINVAL;
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}
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chip->reset_pin = devm_gpiod_get_index(dev, "ac97", 2, GPIOD_OUT_HIGH);
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if (IS_ERR(chip->reset_pin))
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dev_dbg(dev, "reset pin not available\n");
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atmel_ac97c_reset(chip);
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@ -869,9 +825,6 @@ static int atmel_ac97c_probe(struct platform_device *pdev)
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return 0;
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err_ac97_bus:
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if (gpio_is_valid(chip->reset_pin))
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gpio_free(chip->reset_pin);
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iounmap(chip->regs);
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err_ioremap:
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free_irq(irq, chip);
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@ -913,9 +866,6 @@ static int atmel_ac97c_remove(struct platform_device *pdev)
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struct snd_card *card = platform_get_drvdata(pdev);
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struct atmel_ac97c *chip = get_chip(card);
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if (gpio_is_valid(chip->reset_pin))
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gpio_free(chip->reset_pin);
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ac97c_writel(chip, CAMR, 0);
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ac97c_writel(chip, COMR, 0);
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ac97c_writel(chip, MR, 0);
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@ -936,7 +886,7 @@ static struct platform_driver atmel_ac97c_driver = {
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.driver = {
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.name = "atmel_ac97c",
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.pm = ATMEL_AC97C_PM_OPS,
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.of_match_table = of_match_ptr(atmel_ac97c_dt_ids),
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.of_match_table = atmel_ac97c_dt_ids,
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},
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};
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module_platform_driver(atmel_ac97c_driver);
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