[ARM] 4910/1: [AT91] AT73C213 audio on SAM9260-EK and SAM9261-EK boards

Add support for AT73C213 audio DAC on the Atmel SAM9260-EK and
SAM9261-EK boards.

Signed-off-by: Sedji Gaouaou <sedji.gaouaou@atmel.com>
Signed-off-by: Andrew Victor <linux@maxim.org.za>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 38 insertions, 0 deletions

diff --git a/arch/arm/mach-at91/board-sam9261ek.c b/arch/arm/mach-at91/board-sam9261ek.c
index 3c73825b58de..ce512d74e6e9 100644
--- a/arch/arm/mach-at91/board-sam9261ek.c
+++ b/arch/arm/mach-at91/board-sam9261ek.c
@@ -26,6 +26,8 @@
 #include <linux/platform_device.h>
 #include <linux/spi/spi.h>
 #include <linux/spi/ads7846.h>
+#include <linux/spi/at73c213.h>
+#include <linux/clk.h>
 #include <linux/dm9000.h>
 #include <linux/fb.h>
 #include <linux/gpio_keys.h>
@@ -231,6 +233,35 @@ static void __init ek_add_device_ts(void) {}
 #endif
 
 /*
+ * Audio
+ */
+static struct at73c213_board_info at73c213_data = {
+        .ssc_id         = 1,
+        .shortname      = "AT91SAM9261-EK external DAC",
+};
+
+#if defined(CONFIG_SND_AT73C213) || defined(CONFIG_SND_AT73C213_MODULE)
+static void __init at73c213_set_clk(struct at73c213_board_info *info)
+{
+        struct clk *pck2;
+        struct clk *plla;
+
+        pck2 = clk_get(NULL, "pck2");
+        plla = clk_get(NULL, "plla");
+
+        /* AT73C213 MCK Clock */
+        at91_set_B_periph(AT91_PIN_PB31, 0);    /* PCK2 */
+
+        clk_set_parent(pck2, plla);
+        clk_put(plla);
+
+        info->dac_clk = pck2;
+}
+#else
+static void __init at73c213_set_clk(struct at73c213_board_info *info) {}
+#endif
+
+/*
  * SPI devices
  */
 static struct spi_board_info ek_spi_devices[] = {
@@ -248,6 +279,7 @@ static struct spi_board_info ek_spi_devices[] = {
                 .bus_num        = 0,
                 .platform_data  = &ads_info,
                 .irq            = AT91SAM9261_ID_IRQ0,
+                .controller_data = (void *) AT91_PIN_PA28,      /* CS pin */
         },
 #endif
 #if defined(CONFIG_MTD_AT91_DATAFLASH_CARD)
@@ -263,6 +295,9 @@ static struct spi_board_info ek_spi_devices[] = {
                 .chip_select    = 3,
                 .max_speed_hz   = 10 * 1000 * 1000,
                 .bus_num        = 0,
+                .mode           = SPI_MODE_1,
+                .platform_data  = &at73c213_data,
+                .controller_data = (void*) AT91_PIN_PA29,       /* default for CS3 is PA6, but it must be PA29 */
         },
 #endif
 };
@@ -473,6 +508,9 @@ static void __init ek_board_init(void)
         at91_add_device_spi(ek_spi_devices, ARRAY_SIZE(ek_spi_devices));
         /* Touchscreen */
         ek_add_device_ts();
+        /* SSC (to AT73C213) */
+        at73c213_set_clk(&at73c213_data);
+        at91_add_device_ssc(AT91SAM9261_ID_SSC1, ATMEL_SSC_TX);
 #else
         /* MMC */
         at91_add_device_mmc(0, &ek_mmc_data);