At Mon, 29 Dec 2014 13:08:39 +0100, Alexander Stein wrote:
This adds device tree support for the AC97 controller. It uses the soc-ac97link bindings, but actually only ac97-reset is used.
Signed-off-by: Alexander Stein alexanders83@web.de Acked-By Alexandre Belloni alexandre.belloni@free-electrons.com
Applied, thanks.
Takashi
Changes in v3:
- Renamed the compatible string to atmel,at91sam9263-ac97c
- Added 'Acked-By Alexandre Belloni alexandre.belloni@free-electrons.com'
Changes in v2:
- It now uses the soc-ac97link bindings (partly) instead of defining its own. This should ease the transition to ASoC once a new driver has been written.
sound/atmel/ac97c.c | 45 ++++++++++++++++++++++++++++++++++++++++++--- 1 file changed, 42 insertions(+), 3 deletions(-)
diff --git a/sound/atmel/ac97c.c b/sound/atmel/ac97c.c index 4f6b14d..a0df1b1 100644 --- a/sound/atmel/ac97c.c +++ b/sound/atmel/ac97c.c @@ -22,6 +22,9 @@ #include <linux/gpio.h> #include <linux/types.h> #include <linux/io.h> +#include <linux/of.h> +#include <linux/of_gpio.h> +#include <linux/of_device.h>
#include <sound/core.h> #include <sound/initval.h> @@ -902,6 +905,40 @@ static void atmel_ac97c_reset(struct atmel_ac97c *chip) } }
+#ifdef CONFIG_OF +static const struct of_device_id atmel_ac97c_dt_ids[] = {
- { .compatible = "atmel,at91sam9263-ac97c", },
- { }
+}; +MODULE_DEVICE_TABLE(of, atmel_ac97c_dt_ids);
+static struct ac97c_platform_data *atmel_ac97c_probe_dt(struct device *dev) +{
- struct ac97c_platform_data *pdata;
- struct device_node *node = dev->of_node;
- const struct of_device_id *match;
- if (!node) {
dev_err(dev, "Device does not have associated DT data\n");return ERR_PTR(-EINVAL);- }
- pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
- if (!pdata)
return ERR_PTR(-ENOMEM);- pdata->reset_pin = of_get_named_gpio(dev->of_node, "ac97-gpios", 2);
- return pdata;
+} +#else +static struct ac97c_platform_data *atmel_ac97c_probe_dt(struct device *dev) +{
- dev_err(dev, "no platform data defined\n");
- return ERR_PTR(-ENXIO);
+} +#endif
static int atmel_ac97c_probe(struct platform_device *pdev) { struct snd_card *card; @@ -922,10 +959,11 @@ static int atmel_ac97c_probe(struct platform_device *pdev) return -ENXIO; }
- pdata = pdev->dev.platform_data;
- pdata = dev_get_platdata(&pdev->dev); if (!pdata) {
dev_dbg(&pdev->dev, "no platform data\n");return -ENXIO;
pdata = atmel_ac97c_probe_dt(&pdev->dev);if (IS_ERR(pdata))return PTR_ERR(pdata);}
irq = platform_get_irq(pdev, 0);
@@ -1204,6 +1242,7 @@ static struct platform_driver atmel_ac97c_driver = { .driver = { .name = "atmel_ac97c", .pm = ATMEL_AC97C_PM_OPS,
.of_match_table = of_match_ptr(atmel_ac97c_dt_ids),}; module_platform_driver(atmel_ac97c_driver); -- 2.2.1