ASoC: mx27vis: retrieve gpio numbers from platform_data

Rather than including mach/iomux-mx27.h to define gpio numbers and set
up the pins, the patch moves all these into machine code and has the
gpio numbers passed to driver via platform_data. As the result, we
can remove the mach/iomux-mx27.h inclusion from driver.

Signed-off-by: Shawn Guo <[e-mail]>
Acked-by: Javier Martin <[e-mail]>
Signed-off-by: Mark Brown <[e-mail]>

arch/arm/mach-imx/mach-imx27_visstrim_m10.c

···
 #include <linux/dma-mapping.h>
 #include <linux/leds.h>
 #include <linux/memblock.h>
+#include <linux/platform_data/asoc-mx27vis.h>
 #include <media/soc_camera.h>
 #include <sound/tlv320aic32x4.h>
 #include <asm/mach-types.h>
···
 #define EXPBOARD_BIT2		(GPIO_PORTD + 25)
 #define EXPBOARD_BIT1		(GPIO_PORTD + 27)
 #define EXPBOARD_BIT0		(GPIO_PORTD + 28)
+
+#define AMP_GAIN_0		(GPIO_PORTF + 9)
+#define AMP_GAIN_1		(GPIO_PORTF + 8)
+#define AMP_MUTE_SDL		(GPIO_PORTE + 5)
+#define AMP_MUTE_SDR		(GPIO_PORTF + 7)
 
 static const int visstrim_m10_pins[] __initconst = {
 	/* UART1 (console) */
···
 	EXPBOARD_BIT2 | GPIO_GPIO | GPIO_IN | GPIO_PUEN,
 	EXPBOARD_BIT1 | GPIO_GPIO | GPIO_IN | GPIO_PUEN,
 	EXPBOARD_BIT0 | GPIO_GPIO | GPIO_IN | GPIO_PUEN,
+	/* Audio AMP control */
+	AMP_GAIN_0 | GPIO_GPIO | GPIO_OUT,
+	AMP_GAIN_1 | GPIO_GPIO | GPIO_OUT,
+	AMP_MUTE_SDL | GPIO_GPIO | GPIO_OUT,
+	AMP_MUTE_SDR | GPIO_GPIO | GPIO_OUT,
 };
 
 static struct gpio visstrim_m10_version_gpios[] = {
···
 		.gpio = OTG_PHY_CS_GPIO,
 		.flags = GPIOF_DIR_OUT | GPIOF_INIT_LOW,
 		.label = "usbotg_cs",
+	},
+	{
+		.gpio = AMP_GAIN_0,
+		.flags = GPIOF_DIR_OUT,
+		.label = "amp-gain-0",
+	},
+	{
+		.gpio = AMP_GAIN_1,
+		.flags = GPIOF_DIR_OUT,
+		.label = "amp-gain-1",
+	},
+	{
+		.gpio = AMP_MUTE_SDL,
+		.flags = GPIOF_DIR_OUT,
+		.label = "amp-mute-sdl",
+	},
+	{
+		.gpio = AMP_MUTE_SDR,
+		.flags = GPIOF_DIR_OUT,
+		.label = "amp-mute-sdr",
 	},
 };
 
···
 	.flags			= IMX_SSI_DMA | IMX_SSI_SYN,
 };
 
+/* Audio */
+static const struct snd_mx27vis_platform_data snd_mx27vis_pdata __initconst = {
+	.amp_gain0_gpio = AMP_GAIN_0,
+	.amp_gain1_gpio = AMP_GAIN_1,
+	.amp_mutel_gpio = AMP_MUTE_SDL,
+	.amp_muter_gpio = AMP_MUTE_SDR,
+};
+
 static void __init visstrim_m10_revision(void)
 {
 	int exp_version = 0;
···
 	imx27_add_fec(NULL);
 	imx_add_gpio_keys(&visstrim_gpio_keys_platform_data);
 	platform_add_devices(platform_devices, ARRAY_SIZE(platform_devices));
-	imx_add_platform_device("mx27vis", 0, NULL, 0, NULL, 0);
+	imx_add_platform_device("mx27vis", 0, NULL, 0, &snd_mx27vis_pdata,
+				sizeof(snd_mx27vis_pdata));
 	platform_device_register_resndata(NULL, "soc-camera-pdrv", 0, NULL, 0,
 				      &iclink_tvp5150, sizeof(iclink_tvp5150));
 	gpio_led_register_device(0, &visstrim_m10_led_data);

include/linux/platform_data/asoc-mx27vis.h

···
+#ifndef __PLATFORM_DATA_ASOC_MX27VIS_H
+#define __PLATFORM_DATA_ASOC_MX27VIS_H
+
+struct snd_mx27vis_platform_data {
+	int amp_gain0_gpio;
+	int amp_gain1_gpio;
+	int amp_mutel_gpio;
+	int amp_muter_gpio;
+};
+
+#endif /* __PLATFORM_DATA_ASOC_MX27VIS_H */

sound/soc/fsl/mx27vis-aic32x4.c

···
 #include <linux/device.h>
 #include <linux/i2c.h>
 #include <linux/gpio.h>
+#include <linux/platform_data/asoc-mx27vis.h>
 #include <sound/core.h>
 #include <sound/pcm.h>
 #include <sound/soc.h>
 #include <sound/soc-dapm.h>
 #include <sound/tlv.h>
 #include <asm/mach-types.h>
-#include <mach/iomux-mx27.h>
 
 #include "../codecs/tlv320aic32x4.h"
 #include "imx-ssi.h"
···
 #define MX27VIS_AMP_GAIN	0
 #define MX27VIS_AMP_MUTE	1
 
-#define MX27VIS_PIN_G0		(GPIO_PORTF + 9)
-#define MX27VIS_PIN_G1		(GPIO_PORTF + 8)
-#define MX27VIS_PIN_SDL		(GPIO_PORTE + 5)
-#define MX27VIS_PIN_SDR		(GPIO_PORTF + 7)
-
 static int mx27vis_amp_gain;
 static int mx27vis_amp_mute;
-
-static const int mx27vis_amp_pins[] = {
-	MX27VIS_PIN_G0 | GPIO_GPIO | GPIO_OUT,
-	MX27VIS_PIN_G1 | GPIO_GPIO | GPIO_OUT,
-	MX27VIS_PIN_SDL | GPIO_GPIO | GPIO_OUT,
-	MX27VIS_PIN_SDR | GPIO_GPIO | GPIO_OUT,
-};
+static int mx27vis_amp_gain0_gpio;
+static int mx27vis_amp_gain1_gpio;
+static int mx27vis_amp_mutel_gpio;
+static int mx27vis_amp_muter_gpio;
 
 static int mx27vis_aic32x4_hw_params(struct snd_pcm_substream *substream,
 			    struct snd_pcm_hw_params *params)
···
 
 	switch (reg) {
 	case MX27VIS_AMP_GAIN:
-		gpio_set_value(MX27VIS_PIN_G0, value & 1);
-		gpio_set_value(MX27VIS_PIN_G1, value >> 1);
+		gpio_set_value(mx27vis_amp_gain0_gpio, value & 1);
+		gpio_set_value(mx27vis_amp_gain1_gpio, value >> 1);
 		mx27vis_amp_gain = value;
 		break;
 	case MX27VIS_AMP_MUTE:
-		gpio_set_value(MX27VIS_PIN_SDL, value & 1);
-		gpio_set_value(MX27VIS_PIN_SDR, value >> 1);
+		gpio_set_value(mx27vis_amp_mutel_gpio, value & 1);
+		gpio_set_value(mx27vis_amp_muter_gpio, value >> 1);
 		mx27vis_amp_mute = value;
 		break;
 	}
···
 
 static int __devinit mx27vis_aic32x4_probe(struct platform_device *pdev)
 {
+	struct snd_mx27vis_platform_data *pdata = pdev->dev.platform_data;
 	int ret;
+
+	if (!pdata) {
+		dev_err(&pdev->dev, "No platform data supplied\n");
+		return -EINVAL;
+	}
+
+	mx27vis_amp_gain0_gpio = pdata->amp_gain0_gpio;
+	mx27vis_amp_gain1_gpio = pdata->amp_gain1_gpio;
+	mx27vis_amp_mutel_gpio = pdata->amp_mutel_gpio;
+	mx27vis_amp_muter_gpio = pdata->amp_muter_gpio;
 
 	mx27vis_aic32x4.dev = &pdev->dev;
 	ret = snd_soc_register_card(&mx27vis_aic32x4);
···
 			IMX_AUDMUX_V1_PCR_SYN |
 			IMX_AUDMUX_V1_PCR_RXDSEL(MX27_AUDMUX_HPCR1_SSI0)
 	);
-
-	ret = mxc_gpio_setup_multiple_pins(mx27vis_amp_pins,
-			ARRAY_SIZE(mx27vis_amp_pins), "MX27VIS_AMP");
-	if (ret)
-		printk(KERN_ERR "ASoC: unable to setup gpios\n");
 
 	return ret;
 }