avr32: Add platform data for AC97C platform device

This patch adds platform data to the AC97C platform device. This will
let the board add a GPIO line which is connected to the external codecs
reset line.

The platform data, ac97c_platform_data, must also contain the DMA
controller ID, RX channel ID and TX channel ID.

Tested with Wolfson WM9712 and AP7000.

Signed-off-by: Hans-Christian Egtvedt <hcegtvedt@atmel.com>
Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>

1 files changed, 27 insertions, 7 deletions

diff --git a/arch/avr32/mach-at32ap/at32ap700x.c b/arch/avr32/mach-at32ap/at32ap700x.c
index 4ac38d28891d..30c7cdab28d0 100644
--- a/arch/avr32/mach-at32ap/at32ap700x.c
+++ b/arch/avr32/mach-at32ap/at32ap700x.c
@@ -1883,9 +1883,11 @@ static struct clk atmel_ac97c0_pclk = {
         .index          = 10,
 };
 
-struct platform_device *__init at32_add_device_ac97c(unsigned int id)
+struct platform_device *__init
+at32_add_device_ac97c(unsigned int id, struct ac97c_platform_data *data)
 {
         struct platform_device *pdev;
+        struct ac97c_platform_data _data;
 
         if (id != 0)
                 return NULL;
@@ -1896,19 +1898,37 @@ struct platform_device *__init at32_add_device_ac97c(unsigned int id)
 
         if (platform_device_add_resources(pdev, atmel_ac97c0_resource,
                                 ARRAY_SIZE(atmel_ac97c0_resource)))
-                goto err_add_resources;
+                goto fail;
+
+        if (!data) {
+                data = &_data;
+                memset(data, 0, sizeof(struct ac97c_platform_data));
+                data->reset_pin = GPIO_PIN_NONE;
+        }
+
+        data->dma_rx_periph_id = 3;
+        data->dma_tx_periph_id = 4;
+        data->dma_controller_id = 0;
 
-        select_peripheral(PB(20), PERIPH_B, 0); /* SYNC */
-        select_peripheral(PB(21), PERIPH_B, 0); /* SDO  */
-        select_peripheral(PB(22), PERIPH_B, 0); /* SDI  */
-        select_peripheral(PB(23), PERIPH_B, 0); /* SCLK */
+        if (platform_device_add_data(pdev, data,
+                                sizeof(struct ac97c_platform_data)))
+                goto fail;
+
+        select_peripheral(PB(20), PERIPH_B, 0); /* SDO  */
+        select_peripheral(PB(21), PERIPH_B, 0); /* SYNC */
+        select_peripheral(PB(22), PERIPH_B, 0); /* SCLK */
+        select_peripheral(PB(23), PERIPH_B, 0); /* SDI  */
+
+        /* TODO: gpio_is_valid(data->reset_pin) with kernel 2.6.26. */
+        if (data->reset_pin != GPIO_PIN_NONE)
+                at32_select_gpio(data->reset_pin, 0);
 
         atmel_ac97c0_pclk.dev = &pdev->dev;
 
         platform_device_add(pdev);
         return pdev;
 
-err_add_resources:
+fail:
         platform_device_put(pdev);
         return NULL;
 }