ASoC: wm2000: Add regulator support

Signed-off-by: Mark Brown <[e-mail]>

sound/soc/codecs/wm2000.c

···
 #include <linux/i2c.h>
 #include <linux/regmap.h>
 #include <linux/debugfs.h>
+#include <linux/regulator/consumer.h>
 #include <linux/slab.h>
 #include <sound/core.h>
 #include <sound/pcm.h>
···
 
 #include "wm2000.h"
 
+#define WM2000_NUM_SUPPLIES 3
+
+static const char *wm2000_supplies[WM2000_NUM_SUPPLIES] = {
+	"SPKVDD",
+	"DBVDD",
+	"DCVDD",
+};
+
 enum wm2000_anc_mode {
 	ANC_ACTIVE = 0,
 	ANC_BYPASS = 1,
···
 struct wm2000_priv {
 	struct i2c_client *i2c;
 	struct regmap *regmap;
+
+	struct regulator_bulk_data supplies[WM2000_NUM_SUPPLIES];
 
 	enum wm2000_anc_mode anc_mode;
 
···
 
 	dev_dbg(&i2c->dev, "Beginning power up\n");
 
+	ret = regulator_bulk_enable(WM2000_NUM_SUPPLIES, wm2000->supplies);
+	if (ret != 0) {
+		dev_err(&i2c->dev, "Failed to enable supplies: %d\n", ret);
+		return ret;
+	}
+
 	if (!wm2000->mclk_div) {
 		dev_dbg(&i2c->dev, "Disabling MCLK divider\n");
 		wm2000_write(i2c, WM2000_REG_SYS_CTL2,
···
 	if (!wm2000_poll_bit(i2c, WM2000_REG_ANC_STAT,
 			     WM2000_ANC_ENG_IDLE)) {
 		dev_err(&i2c->dev, "ANC engine failed to reset\n");
+		regulator_bulk_disable(WM2000_NUM_SUPPLIES, wm2000->supplies);
 		return -ETIMEDOUT;
 	}
 
 	if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
 			     WM2000_STATUS_BOOT_COMPLETE)) {
 		dev_err(&i2c->dev, "ANC engine failed to initialise\n");
+		regulator_bulk_disable(WM2000_NUM_SUPPLIES, wm2000->supplies);
 		return -ETIMEDOUT;
 	}
 
···
 			      wm2000->anc_download_size);
 	if (ret < 0) {
 		dev_err(&i2c->dev, "i2c_transfer() failed: %d\n", ret);
+		regulator_bulk_disable(WM2000_NUM_SUPPLIES, wm2000->supplies);
 		return ret;
 	}
 	if (ret != wm2000->anc_download_size) {
 		dev_err(&i2c->dev, "i2c_transfer() failed, %d != %d\n",
 			ret, wm2000->anc_download_size);
+		regulator_bulk_disable(WM2000_NUM_SUPPLIES, wm2000->supplies);
 		return -EIO;
 	}
 
···
 	if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
 			     WM2000_STATUS_MOUSE_ACTIVE)) {
 		dev_err(&i2c->dev, "Timed out waiting for device\n");
+		regulator_bulk_disable(WM2000_NUM_SUPPLIES, wm2000->supplies);
 		return -ETIMEDOUT;
 	}
 
···
 		dev_err(&i2c->dev, "Timeout waiting for ANC engine idle\n");
 		return -ETIMEDOUT;
 	}
+
+	regulator_bulk_disable(WM2000_NUM_SUPPLIES, wm2000->supplies);
 
 	dev_dbg(&i2c->dev, "powered off\n");
 	wm2000->anc_mode = ANC_OFF;
···
 	struct wm2000_platform_data *pdata;
 	const char *filename;
 	const struct firmware *fw = NULL;
-	int ret;
+	int ret, i;
 	int reg;
 	u16 id;
 
···
 		goto out;
 	}
 
+	for (i = 0; i < WM2000_NUM_SUPPLIES; i++)
+		wm2000->supplies[i].supply = wm2000_supplies[i];
+
+	ret = devm_regulator_bulk_get(&i2c->dev, WM2000_NUM_SUPPLIES,
+				      wm2000->supplies);
+	if (ret != 0) {
+		dev_err(&i2c->dev, "Failed to get supplies: %d\n", ret);
+		return ret;
+	}
+
+	ret = regulator_bulk_enable(WM2000_NUM_SUPPLIES, wm2000->supplies);
+	if (ret != 0) {
+		dev_err(&i2c->dev, "Failed to enable supplies: %d\n", ret);
+		return ret;
+	}
+
 	/* Verify that this is a WM2000 */
 	reg = wm2000_read(i2c, WM2000_REG_ID1);
 	id = reg << 8;
···
 	if (id != 0x2000) {
 		dev_err(&i2c->dev, "Device is not a WM2000 - ID %x\n", id);
 		ret = -ENODEV;
-		goto out;
+		goto err_supplies;
 	}
 
 	reg = wm2000_read(i2c, WM2000_REG_REVISON);
···
 	ret = request_firmware(&fw, filename, &i2c->dev);
 	if (ret != 0) {
 		dev_err(&i2c->dev, "Failed to acquire ANC data: %d\n", ret);
-		goto out;
+		goto err_supplies;
 	}
 
 	/* Pre-cook the concatenation of the register address onto the image */
···
 	if (wm2000->anc_download == NULL) {
 		dev_err(&i2c->dev, "Out of memory\n");
 		ret = -ENOMEM;
-		goto out;
+		goto err_supplies;
 	}
 
 	wm2000->anc_download[0] = 0x80;
···
 	wm2000_reset(wm2000);
 
 	ret = snd_soc_register_codec(&i2c->dev, &soc_codec_dev_wm2000, NULL, 0);
-	if (!ret)
-		goto out;
+
+err_supplies:
+	regulator_bulk_disable(WM2000_NUM_SUPPLIES, wm2000->supplies);
 
 out:
 	release_firmware(fw);