[PATCH 2/2] ASoC: pxa: add devicetree support

[Robert Jarzmik]

Add the devicetree support, so that the driver can be used in a
devictree platform.

Signed-off-by: Robert Jarzmik <robert.jarz...@free.fr>
---
 sound/arm/pxa2xx-ac97-lib.c | 11 +++++++++++
 sound/soc/pxa/pxa2xx-ac97.c | 10 ++++++++++
 2 files changed, 21 insertions(+)

diff --git a/sound/arm/pxa2xx-ac97-lib.c b/sound/arm/pxa2xx-ac97-lib.c
index 5950a9e218d9..17c3f26b92b9 100644
--- a/sound/arm/pxa2xx-ac97-lib.c
+++ b/sound/arm/pxa2xx-ac97-lib.c
@@ -19,6 +19,7 @@
 #include <linux/module.h>
 #include <linux/io.h>
 #include <linux/gpio.h>
+#include <linux/of_gpio.h>
 
 #include <sound/pxa2xx-lib.h>
 
@@ -337,6 +338,16 @@ int pxa2xx_ac97_hw_probe(struct platform_device *dev)
                        dev_err(&dev->dev, "Invalid reset GPIO %d\n",
                                pdata->reset_gpio);
                }
+       } else if (!pdata && dev->dev.of_node) {
+               pdata = devm_kzalloc(&dev->dev, sizeof(*pdata), GFP_KERNEL);
+               if (!pdata)
+                       return -ENOMEM;
+               pdata->reset_gpio = of_get_named_gpio(dev->dev.of_node,
+                                                     "reset-gpio", 0);
+               if (pdata->reset_gpio == -ENOENT)
+                       pdata->reset_gpio = -1;
+               else if (pdata->reset_gpio < 0)
+                       return pdata->reset_gpio;
        } else {
                if (cpu_is_pxa27x())
                        reset_gpio = 113;
diff --git a/sound/soc/pxa/pxa2xx-ac97.c b/sound/soc/pxa/pxa2xx-ac97.c
index bd36578ceb86..8fda29262ef1 100644
--- a/sound/soc/pxa/pxa2xx-ac97.c
+++ b/sound/soc/pxa/pxa2xx-ac97.c
@@ -231,6 +231,15 @@ static const struct snd_soc_component_driver 
pxa_ac97_component = {
        .name           = "pxa-ac97",
 };
 
+#ifdef CONFIG_OF
+static const struct of_device_id pxa2xx_ac97_dt_ids[] = {
+       { .compatible = "marvell,pxa2xx-ac97", },
+       { }
+};
+MODULE_DEVICE_TABLE(of, pxa2xx_ac97_dt_ids);
+
+#endif
+
 static int pxa2xx_ac97_dev_probe(struct platform_device *pdev)
 {
        int ret;
@@ -298,6 +307,7 @@ static struct platform_driver pxa2xx_ac97_driver = {
 #ifdef CONFIG_PM_SLEEP
                .pm     = &pxa2xx_ac97_pm_ops,
 #endif
+               .of_match_table = of_match_ptr(pxa2xx_ac97_dt_ids),
        },
 };
 
-- 
2.11.0