summaryrefslogtreecommitdiffstats
path: root/arch/arm/mach-ep93xx
diff options
context:
space:
mode:
authorAlexander Sverdlin <subaparts@yandex.ru>2011-03-03 10:53:52 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2011-03-06 08:39:57 +0000
commit31bb68a314e9a2c9fbe054441b18c0608585605e (patch)
tree5405ca99051b32d3c05309750d9146b5000136de /arch/arm/mach-ep93xx
parent130551928195bdef3369e13572b9a383400681bb (diff)
downloadlinux-31bb68a314e9a2c9fbe054441b18c0608585605e.tar.bz2
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>
Diffstat (limited to 'arch/arm/mach-ep93xx')
-rw-r--r--arch/arm/mach-ep93xx/edb93xx.c83
1 files changed, 83 insertions, 0 deletions
diff --git a/arch/arm/mach-ep93xx/edb93xx.c b/arch/arm/mach-ep93xx/edb93xx.c
index fad371df40ed..9969bb115f60 100644
--- 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>
@@ -94,6 +98,83 @@ 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
*************************************************************************/
static void __init edb93xx_register_pwm(void)
@@ -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();
}