sunxi: axp221: Add axp223 support

The axp223 appears to be the same as the axp221, except that it uses the
rsb to communicate rather then the p2wi. At least all the registers we use
are 100% the same.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>

2 files changed, 71 insertions, 25 deletions

diff --git a/drivers/power/Kconfig b/drivers/power/Kconfig
index 1ec7c0e59a..7373a793e2 100644
--- a/drivers/power/Kconfig
+++ b/drivers/power/Kconfig
@@ -1,10 +1,10 @@
 config AXP221_POWER
-	boolean "axp221 pmic support"
-	depends on MACH_SUN6I
+	boolean "axp221 / axp223 pmic support"
+	depends on MACH_SUN6I || MACH_SUN8I
 	default y
 	---help---
-	Say y here to enable support for the axp221 pmic found on most sun6i
-	(A31) boards.
+	Say y here to enable support for the axp221 / axp223 pmic found on most
+	sun6i (A31) / sun8i (A23) boards.
 
 config AXP221_DLDO1_VOLT
 	int "axp221 dldo1 voltage"
diff --git a/drivers/power/axp221.c b/drivers/power/axp221.c
index 826567a836..4667579c91 100644
--- a/drivers/power/axp221.c
+++ b/drivers/power/axp221.c
@@ -1,4 +1,10 @@
 /*
+ * AXP221 and AXP223 driver
+ *
+ * IMPORTANT when making changes to this file check that the registers
+ * used are the same for the axp221 and axp223.
+ *
+ * (C) Copyright 2014 Hans de Goede <hdegoede@redhat.com>
  * (C) Copyright 2013 Oliver Schinagl <oliver@schinagl.nl>
  *
  * SPDX-License-Identifier:	GPL-2.0+
@@ -7,8 +13,50 @@
 #include <common.h>
 #include <errno.h>
 #include <asm/arch/p2wi.h>
+#include <asm/arch/rsb.h>
 #include <axp221.h>
 
+/*
+ * The axp221 uses the p2wi bus, the axp223 is identical (for all registers
+ * used sofar) but uses the rsb bus. These functions abstract this.
+ */
+static int pmic_bus_init(void)
+{
+#ifdef CONFIG_MACH_SUN6I
+	p2wi_init();
+	return p2wi_change_to_p2wi_mode(AXP221_CHIP_ADDR, AXP221_CTRL_ADDR,
+					AXP221_INIT_DATA);
+#else
+	int ret;
+
+	rsb_init();
+
+	ret = rsb_set_device_mode(AXP223_DEVICE_MODE_DATA);
+	if (ret)
+		return ret;
+
+	return rsb_set_device_address(AXP223_DEVICE_ADDR, AXP223_RUNTIME_ADDR);
+#endif
+}
+
+static int pmic_bus_read(const u8 addr, u8 *data)
+{
+#ifdef CONFIG_MACH_SUN6I
+	return p2wi_read(addr, data);
+#else
+	return rsb_read(AXP223_RUNTIME_ADDR, addr, data);
+#endif
+}
+
+static int pmic_bus_write(const u8 addr, u8 data)
+{
+#ifdef CONFIG_MACH_SUN6I
+	return p2wi_write(addr, data);
+#else
+	return rsb_write(AXP223_RUNTIME_ADDR, addr, data);
+#endif
+}
+
 static u8 axp221_mvolt_to_cfg(int mvolt, int min, int max, int div)
 {
 	if (mvolt < min)
@@ -24,12 +72,12 @@ static int axp221_setbits(u8 reg, u8 bits)
 	int ret;
 	u8 val;
 
-	ret = p2wi_read(reg, &val);
+	ret = pmic_bus_read(reg, &val);
 	if (ret)
 		return ret;
 
 	val |= bits;
-	return p2wi_write(reg, val);
+	return pmic_bus_write(reg, val);
 }
 
 int axp221_set_dcdc1(unsigned int mvolt)
@@ -37,7 +85,7 @@ int axp221_set_dcdc1(unsigned int mvolt)
 	int ret;
 	u8 cfg = axp221_mvolt_to_cfg(mvolt, 1600, 3400, 100);
 
-	ret = p2wi_write(AXP221_DCDC1_CTRL, cfg);
+	ret = pmic_bus_write(AXP221_DCDC1_CTRL, cfg);
 	if (ret)
 		return ret;
 
@@ -49,28 +97,28 @@ int axp221_set_dcdc2(unsigned int mvolt)
 {
 	u8 cfg = axp221_mvolt_to_cfg(mvolt, 600, 1540, 20);
 
-	return p2wi_write(AXP221_DCDC2_CTRL, cfg);
+	return pmic_bus_write(AXP221_DCDC2_CTRL, cfg);
 }
 
 int axp221_set_dcdc3(unsigned int mvolt)
 {
 	u8 cfg = axp221_mvolt_to_cfg(mvolt, 600, 1860, 20);
 
-	return p2wi_write(AXP221_DCDC3_CTRL, cfg);
+	return pmic_bus_write(AXP221_DCDC3_CTRL, cfg);
 }
 
 int axp221_set_dcdc4(unsigned int mvolt)
 {
 	u8 cfg = axp221_mvolt_to_cfg(mvolt, 600, 1540, 20);
 
-	return p2wi_write(AXP221_DCDC4_CTRL, cfg);
+	return pmic_bus_write(AXP221_DCDC4_CTRL, cfg);
 }
 
 int axp221_set_dcdc5(unsigned int mvolt)
 {
 	u8 cfg = axp221_mvolt_to_cfg(mvolt, 1000, 2550, 50);
 
-	return p2wi_write(AXP221_DCDC5_CTRL, cfg);
+	return pmic_bus_write(AXP221_DCDC5_CTRL, cfg);
 }
 
 int axp221_set_dldo1(unsigned int mvolt)
@@ -78,7 +126,7 @@ int axp221_set_dldo1(unsigned int mvolt)
 	int ret;
 	u8 cfg = axp221_mvolt_to_cfg(mvolt, 700, 3300, 100);
 
-	ret = p2wi_write(AXP221_DLDO1_CTRL, cfg);
+	ret = pmic_bus_write(AXP221_DLDO1_CTRL, cfg);
 	if (ret)
 		return ret;
 
@@ -91,7 +139,7 @@ int axp221_set_dldo2(unsigned int mvolt)
 	int ret;
 	u8 cfg = axp221_mvolt_to_cfg(mvolt, 700, 3300, 100);
 
-	ret = p2wi_write(AXP221_DLDO2_CTRL, cfg);
+	ret = pmic_bus_write(AXP221_DLDO2_CTRL, cfg);
 	if (ret)
 		return ret;
 
@@ -104,7 +152,7 @@ int axp221_set_dldo3(unsigned int mvolt)
 	int ret;
 	u8 cfg = axp221_mvolt_to_cfg(mvolt, 700, 3300, 100);
 
-	ret = p2wi_write(AXP221_DLDO3_CTRL, cfg);
+	ret = pmic_bus_write(AXP221_DLDO3_CTRL, cfg);
 	if (ret)
 		return ret;
 
@@ -117,7 +165,7 @@ int axp221_set_dldo4(unsigned int mvolt)
 	int ret;
 	u8 cfg = axp221_mvolt_to_cfg(mvolt, 700, 3300, 100);
 
-	ret = p2wi_write(AXP221_DLDO4_CTRL, cfg);
+	ret = pmic_bus_write(AXP221_DLDO4_CTRL, cfg);
 	if (ret)
 		return ret;
 
@@ -130,7 +178,7 @@ int axp221_set_aldo1(unsigned int mvolt)
 	int ret;
 	u8 cfg = axp221_mvolt_to_cfg(mvolt, 700, 3300, 100);
 
-	ret = p2wi_write(AXP221_ALDO1_CTRL, cfg);
+	ret = pmic_bus_write(AXP221_ALDO1_CTRL, cfg);
 	if (ret)
 		return ret;
 
@@ -143,7 +191,7 @@ int axp221_set_aldo2(unsigned int mvolt)
 	int ret;
 	u8 cfg = axp221_mvolt_to_cfg(mvolt, 700, 3300, 100);
 
-	ret = p2wi_write(AXP221_ALDO2_CTRL, cfg);
+	ret = pmic_bus_write(AXP221_ALDO2_CTRL, cfg);
 	if (ret)
 		return ret;
 
@@ -156,7 +204,7 @@ int axp221_set_aldo3(unsigned int mvolt)
 	int ret;
 	u8 cfg = axp221_mvolt_to_cfg(mvolt, 700, 3300, 100);
 
-	ret = p2wi_write(AXP221_ALDO3_CTRL, cfg);
+	ret = pmic_bus_write(AXP221_ALDO3_CTRL, cfg);
 	if (ret)
 		return ret;
 
@@ -169,13 +217,11 @@ int axp221_init(void)
 	u8 axp_chip_id;
 	int ret;
 
-	p2wi_init();
-	ret = p2wi_change_to_p2wi_mode(AXP221_CHIP_ADDR, AXP221_CTRL_ADDR,
-				       AXP221_INIT_DATA);
+	ret = pmic_bus_init();
 	if (ret)
 		return ret;
 
-	ret = p2wi_read(AXP221_CHIP_ID, &axp_chip_id);
+	ret = pmic_bus_read(AXP221_CHIP_ID, &axp_chip_id);
 	if (ret)
 		return ret;
 
@@ -194,17 +240,17 @@ int axp221_get_sid(unsigned int *sid)
 	if (ret)
 		return ret;
 
-	ret = p2wi_write(AXP221_PAGE, 1);
+	ret = pmic_bus_write(AXP221_PAGE, 1);
 	if (ret)
 		return ret;
 
 	for (i = 0; i < 16; i++) {
-		ret = p2wi_read(AXP221_SID + i, &dest[i]);
+		ret = pmic_bus_read(AXP221_SID + i, &dest[i]);
 		if (ret)
 			return ret;
 	}
 
-	p2wi_write(AXP221_PAGE, 0);
+	pmic_bus_write(AXP221_PAGE, 0);
 
 	for (i = 0; i < 4; i++)
 		sid[i] = be32_to_cpu(sid[i]);