From: Mark Brown <broonie@opensource.wolfsonmicro.com>
Date: Thu, 18 Dec 2008 22:12:16 +0000 (+0100)
Subject: mfd: Support configurable numbers of DCDCs and ISINKs on WM8350
X-Git-Tag: v2.6.29-rc1~493^2~6
X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=645524a9c6e1e42dc4fe03217befb20e2fc4d43e;p=linux-2.6-omap-h63xx.git

mfd: Support configurable numbers of DCDCs and ISINKs on WM8350

Some WM8350 variants have fewer DCDCs and ISINKs. Identify these at
probe and refuse to use the absent DCDCs when running on these chips.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Samuel Ortiz <sameo@openedhand.com>
---

diff --git a/drivers/mfd/wm8350-core.c b/drivers/mfd/wm8350-core.c
index 03af3b12c02..56c363c240a 100644
--- a/drivers/mfd/wm8350-core.c
+++ b/drivers/mfd/wm8350-core.c
@@ -1301,6 +1301,9 @@ int wm8350_device_init(struct wm8350 *wm8350, int irq,
 
 	switch (mask_rev) {
 	case 0:
+		wm8350->pmic.max_dcdc = WM8350_DCDC_6;
+		wm8350->pmic.max_isink = WM8350_ISINK_B;
+
 		switch (chip_rev) {
 		case WM8350_REV_E:
 			dev_info(wm8350->dev, "WM8350 Rev E\n");
@@ -1325,6 +1328,9 @@ int wm8350_device_init(struct wm8350 *wm8350, int irq,
 		break;
 
 	case 2:
+		wm8350->pmic.max_dcdc = WM8350_DCDC_6;
+		wm8350->pmic.max_isink = WM8350_ISINK_B;
+
 		switch (chip_rev) {
 		case 0:
 			dev_info(wm8350->dev, "WM8352 Rev A\n");
diff --git a/drivers/regulator/wm8350-regulator.c b/drivers/regulator/wm8350-regulator.c
index 1f44b17e23b..c68c496b2c4 100644
--- a/drivers/regulator/wm8350-regulator.c
+++ b/drivers/regulator/wm8350-regulator.c
@@ -1380,6 +1380,13 @@ int wm8350_register_regulator(struct wm8350 *wm8350, int reg,
 	if (wm8350->pmic.pdev[reg])
 		return -EBUSY;
 
+	if (reg >= WM8350_DCDC_1 && reg <= WM8350_DCDC_6 &&
+	    reg > wm8350->pmic.max_dcdc)
+		return -ENODEV;
+	if (reg >= WM8350_ISINK_A && reg <= WM8350_ISINK_B &&
+	    reg > wm8350->pmic.max_isink)
+		return -ENODEV;
+
 	pdev = platform_device_alloc("wm8350-regulator", reg);
 	if (!pdev)
 		return -ENOMEM;
diff --git a/include/linux/mfd/wm8350/pmic.h b/include/linux/mfd/wm8350/pmic.h
index 69b69e07f62..96acbfc8aa1 100644
--- a/include/linux/mfd/wm8350/pmic.h
+++ b/include/linux/mfd/wm8350/pmic.h
@@ -701,6 +701,10 @@ struct platform_device;
 struct regulator_init_data;
 
 struct wm8350_pmic {
+	/* Number of regulators of each type on this device */
+	int max_dcdc;
+	int max_isink;
+
 	/* ISINK to DCDC mapping */
 	int isink_A_dcdc;
 	int isink_B_dcdc;