linux-kernel - [PATCH 14/24] ab8500-charger: Add support for autopower on AB8505 and AB9540

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Message-Id: <1358769840-4763-15-git-send-email-lee.jones@linaro.org>
Date:	Mon, 21 Jan 2013 12:03:50 +0000
From:	Lee Jones <lee.jones@...aro.org>
To:	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc:	arnd@...db.de, linus.walleij@...ricsson.com,
	anton.vorontsov@...aro.org, cbou@...l.ru,
	Nicolas Guion <nicolas.guion@...ricsson.com>,
	Lee Jones <lee.jones@...aro.org>,
	Marcus Cooper <marcus.xm.cooper@...ricsson.com>
Subject: [PATCH 14/24] ab8500-charger: Add support for autopower on AB8505 and AB9540

From: Nicolas Guion <nicolas.guion@...ricsson.com>

Accessing autopower register fails on the AB8505 and ab9540 as
the fallback software control register has moved.

Signed-off-by: Lee Jones <lee.jones@...aro.org>
Signed-off-by: Marcus Cooper <marcus.xm.cooper@...ricsson.com>
Reviewed-by: Mattias WALLIN <mattias.wallin@...ricsson.com>
Reviewed-by: Nicolas GUION <nicolas.guion@...ricsson.com>
Reviewed-by: Jonas ABERG <jonas.aberg@...ricsson.com>
Tested-by: Jonas ABERG <jonas.aberg@...ricsson.com>
---
 drivers/power/ab8500_charger.c |   52 +++++++++++++++++++++++++++-------------
 1 file changed, 35 insertions(+), 17 deletions(-)

diff --git a/drivers/power/ab8500_charger.c b/drivers/power/ab8500_charger.c
index d834566..da965ee 100644
--- a/drivers/power/ab8500_charger.c
+++ b/drivers/power/ab8500_charger.c
@@ -95,6 +95,8 @@
 
 #define CHG_WD_INTERVAL			(60 * HZ)
 
+#define AB8500_SW_CONTROL_FALLBACK	0x03
+
 /* UsbLineStatus register - usb types */
 enum ab8500_charger_link_status {
 	USB_STAT_NOT_CONFIGURED,
@@ -312,42 +314,58 @@ static enum power_supply_property ab8500_charger_usb_props[] = {
 static void ab8500_enable_disable_sw_fallback(struct ab8500_charger *di,
 		bool fallback)
 {
+	u8 val;
 	u8 reg;
+	u8 bank;
+	u8 bit;
 	int ret;
 
 	dev_dbg(di->dev, "SW Fallback: %d\n", fallback);
 
+	if (is_ab8500(di->parent)) {
+		bank = 0x15;
+		reg = 0x0;
+		bit = 3;
+	} else {
+		bank = AB8500_SYS_CTRL1_BLOCK;
+		reg = AB8500_SW_CONTROL_FALLBACK;
+		bit = 0;
+	}
+
 	/* read the register containing fallback bit */
-	ret = abx500_get_register_interruptible(di->dev, 0x15, 0x00, &reg);
-	if (ret) {
-		dev_err(di->dev, "%d write failed\n", __LINE__);
+	ret = abx500_get_register_interruptible(di->dev, bank, reg, &val);
+	if (ret < 0) {
+		dev_err(di->dev, "%d read failed\n", __LINE__);
 		return;
 	}
 
-	/* enable the OPT emulation registers */
-	ret = abx500_set_register_interruptible(di->dev, 0x11, 0x00, 0x2);
-	if (ret) {
-		dev_err(di->dev, "%d write failed\n", __LINE__);
-		return;
+	if (is_ab8500(di->parent)) {
+		/* enable the OPT emulation registers */
+		ret = abx500_set_register_interruptible(di->dev, 0x11, 0x00, 0x2);
+		if (ret) {
+			dev_err(di->dev, "%d write failed\n", __LINE__);
+			goto disable_otp;
+		}
 	}
 
 	if (fallback)
-		reg |= 0x8;
+		val |= (1 << bit);
 	else
-		reg &= ~0x8;
+		val &= ~(1 << bit);
 
 	/* write back the changed fallback bit value to register */
-	ret = abx500_set_register_interruptible(di->dev, 0x15, 0x00, reg);
+	ret = abx500_set_register_interruptible(di->dev, bank, reg, val);
 	if (ret) {
 		dev_err(di->dev, "%d write failed\n", __LINE__);
-		return;
 	}
 
-	/* disable the set OTP registers again */
-	ret = abx500_set_register_interruptible(di->dev, 0x11, 0x00, 0x0);
-	if (ret) {
-		dev_err(di->dev, "%d write failed\n", __LINE__);
-		return;
+disable_otp:
+	if (is_ab8500(di->parent)) {
+		/* disable the set OTP registers again */
+		ret = abx500_set_register_interruptible(di->dev, 0x11, 0x00, 0x0);
+		if (ret) {
+			dev_err(di->dev, "%d write failed\n", __LINE__);
+		}
 	}
 }
 
-- 
1.7.9.5

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