mfd: Add WM8351 support

The WM8351 is a WM8350 variant. As well as register default changes the
WM8351 has fewer voltage and current regulators than the WM8350.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Samuel Ortiz <sameo@openedhand.com>

drivers/mfd/Kconfig

@@ -143,6 +143,22 @@ config MFD_WM8350_CONFIG_MODE_3
 	bool
 	depends on MFD_WM8350
 
+config MFD_WM8351_CONFIG_MODE_0
+	bool
+	depends on MFD_WM8350
+
+config MFD_WM8351_CONFIG_MODE_1
+	bool
+	depends on MFD_WM8350
+
+config MFD_WM8351_CONFIG_MODE_2
+	bool
+	depends on MFD_WM8350
+
+config MFD_WM8351_CONFIG_MODE_3
+	bool
+	depends on MFD_WM8350
+
 config MFD_WM8352_CONFIG_MODE_0
 	bool
 	depends on MFD_WM8350

drivers/mfd/wm8350-core.c

@@ -1169,6 +1169,36 @@ static int wm8350_create_cache(struct wm8350 *wm8350, int type, int mode)
 			return -EINVAL;
 		}
 
+	case 1:
+		switch (mode) {
+#ifdef CONFIG_MFD_WM8351_CONFIG_MODE_0
+		case 0:
+			reg_map = wm8351_mode0_defaults;
+			break;
+#endif
+#ifdef CONFIG_MFD_WM8351_CONFIG_MODE_1
+		case 1:
+			reg_map = wm8351_mode1_defaults;
+			break;
+#endif
+#ifdef CONFIG_MFD_WM8351_CONFIG_MODE_2
+		case 2:
+			reg_map = wm8351_mode2_defaults;
+			break;
+#endif
+#ifdef CONFIG_MFD_WM8351_CONFIG_MODE_3
+		case 3:
+			reg_map = wm8351_mode3_defaults;
+			break;
+#endif
+		default:
+			dev_err(wm8350->dev,
+				"WM8351 configuration mode %d not supported\n",
+				mode);
+			return -EINVAL;
+		}
+		break;
+
 	case 2:
 		switch (mode) {
 #ifdef CONFIG_MFD_WM8352_CONFIG_MODE_0
@@ -1327,6 +1357,23 @@ int wm8350_device_init(struct wm8350 *wm8350, int irq,
 		}
 		break;
 
+	case 1:
+		wm8350->pmic.max_dcdc = WM8350_DCDC_4;
+		wm8350->pmic.max_isink = WM8350_ISINK_A;
+
+		switch (chip_rev) {
+		case 0:
+			dev_info(wm8350->dev, "WM8351 Rev A\n");
+			wm8350->power.rev_g_coeff = 1;
+			break;
+
+		default:
+			dev_err(wm8350->dev, "Unknown WM8351 CHIP_REV\n");
+			ret = -ENODEV;
+			goto err;
+		}
+		break;
+
 	case 2:
 		wm8350->pmic.max_dcdc = WM8350_DCDC_6;
 		wm8350->pmic.max_isink = WM8350_ISINK_B;

drivers/mfd/wm8350-i2c.c

@@ -97,6 +97,7 @@ static int wm8350_i2c_remove(struct i2c_client *i2c)
 
 static const struct i2c_device_id wm8350_i2c_id[] = {
        { "wm8350", 0 },
+       { "wm8351", 0 },
        { "wm8352", 0 },
        { }
 };

include/linux/mfd/wm8350/core.h

@@ -589,6 +589,10 @@ extern const u16 wm8350_mode0_defaults[];
 extern const u16 wm8350_mode1_defaults[];
 extern const u16 wm8350_mode2_defaults[];
 extern const u16 wm8350_mode3_defaults[];
+extern const u16 wm8351_mode0_defaults[];
+extern const u16 wm8351_mode1_defaults[];
+extern const u16 wm8351_mode2_defaults[];
+extern const u16 wm8351_mode3_defaults[];
 extern const u16 wm8352_mode0_defaults[];
 extern const u16 wm8352_mode1_defaults[];
 extern const u16 wm8352_mode2_defaults[];