ARM: 6780/1: EDB93xx: Add support for CS4271 SPI-connected CODEC

Add support for CS4271 SPI-connected CODEC to EDB93xx.

Signed-off-by: Alexander Sverdlin <subaparts@yandex.ru>
Acked-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Acked-by: liam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

diff --git a/arch/arm/mach-ep93xx/edb93xx.c b/arch/arm/mach-ep93xx/edb93xx.c
index fad371df40edfe75164f522d0432bbad809f10dc..9969bb115f602d915330b0ebdca3c683862d7269 100644 (file)
--- a/arch/arm/mach-ep93xx/edb93xx.c
+++ b/arch/arm/mach-ep93xx/edb93xx.c
@@ -30,9 +30,13 @@
 #include <linux/gpio.h>
 #include <linux/i2c.h>
 #include <linux/i2c-gpio.h>
+#include <linux/spi/spi.h>
+
+#include <sound/cs4271.h>
 
 #include <mach/hardware.h>
 #include <mach/fb.h>
+#include <mach/ep93xx_spi.h>
 
 #include <asm/mach-types.h>
 #include <asm/mach/arch.h>
@@ -93,6 +97,83 @@ static void __init edb93xx_register_i2c(void)
 }
 
 
+/*************************************************************************
+ * EDB93xx SPI peripheral handling
+ *************************************************************************/
+static struct cs4271_platform_data edb93xx_cs4271_data = {
+       .gpio_nreset    = -EINVAL,      /* filled in later */
+};
+
+static int edb93xx_cs4271_hw_setup(struct spi_device *spi)
+{
+       return gpio_request_one(EP93XX_GPIO_LINE_EGPIO6,
+                               GPIOF_OUT_INIT_HIGH, spi->modalias);
+}
+
+static void edb93xx_cs4271_hw_cleanup(struct spi_device *spi)
+{
+       gpio_free(EP93XX_GPIO_LINE_EGPIO6);
+}
+
+static void edb93xx_cs4271_hw_cs_control(struct spi_device *spi, int value)
+{
+       gpio_set_value(EP93XX_GPIO_LINE_EGPIO6, value);
+}
+
+static struct ep93xx_spi_chip_ops edb93xx_cs4271_hw = {
+       .setup          = edb93xx_cs4271_hw_setup,
+       .cleanup        = edb93xx_cs4271_hw_cleanup,
+       .cs_control     = edb93xx_cs4271_hw_cs_control,
+};
+
+static struct spi_board_info edb93xx_spi_board_info[] __initdata = {
+       {
+               .modalias               = "cs4271",
+               .platform_data          = &edb93xx_cs4271_data,
+               .controller_data        = &edb93xx_cs4271_hw,
+               .max_speed_hz           = 6000000,
+               .bus_num                = 0,
+               .chip_select            = 0,
+               .mode                   = SPI_MODE_3,
+       },
+};
+
+static struct ep93xx_spi_info edb93xx_spi_info __initdata = {
+       .num_chipselect = ARRAY_SIZE(edb93xx_spi_board_info),
+};
+
+static void __init edb93xx_register_spi(void)
+{
+       if (machine_is_edb9301() || machine_is_edb9302())
+               edb93xx_cs4271_data.gpio_nreset = EP93XX_GPIO_LINE_EGPIO1;
+       else if (machine_is_edb9302a() || machine_is_edb9307a())
+               edb93xx_cs4271_data.gpio_nreset = EP93XX_GPIO_LINE_H(2);
+       else if (machine_is_edb9315a())
+               edb93xx_cs4271_data.gpio_nreset = EP93XX_GPIO_LINE_EGPIO14;
+
+       ep93xx_register_spi(&edb93xx_spi_info, edb93xx_spi_board_info,
+                           ARRAY_SIZE(edb93xx_spi_board_info));
+}
+
+
+/*************************************************************************
+ * EDB93xx I2S
+ *************************************************************************/
+static int __init edb93xx_has_audio(void)
+{
+       return (machine_is_edb9301() || machine_is_edb9302() ||
+               machine_is_edb9302a() || machine_is_edb9307a() ||
+               machine_is_edb9315a());
+}
+
+static void __init edb93xx_register_i2s(void)
+{
+       if (edb93xx_has_audio()) {
+               ep93xx_register_i2s();
+       }
+}
+
+
 /*************************************************************************
  * EDB93xx pwm
  *************************************************************************/
@@ -149,6 +230,8 @@ static void __init edb93xx_init_machine(void)
        edb93xx_register_flash();
        ep93xx_register_eth(&edb93xx_eth_data, 1);
        edb93xx_register_i2c();
+       edb93xx_register_spi();
+       edb93xx_register_i2s();
        edb93xx_register_pwm();
        edb93xx_register_fb();
 }