sunxi: axp: Move axp pmic register helpers to a separate file
Move the register helpers used to access the registers via p2wi resp.
rsb bus on the otherwise identical axp221 and axp223 pmics to a separate
file, so that they can be used by the upcoming standalone axp gpio driver
too.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
diff --git a/arch/arm/cpu/armv7/sunxi/Makefile b/arch/arm/cpu/armv7/sunxi/Makefile
index 3052b27..9a1eeec 100644
--- a/arch/arm/cpu/armv7/sunxi/Makefile
+++ b/arch/arm/cpu/armv7/sunxi/Makefile
@@ -27,6 +27,8 @@
obj-$(CONFIG_MACH_SUN8I) += clock_sun6i.o
obj-$(CONFIG_MACH_SUN9I) += clock_sun9i.o
+obj-$(CONFIG_AXP221_POWER) += pmic_bus.o
+
ifndef CONFIG_SPL_BUILD
ifdef CONFIG_ARMV7_PSCI
obj-y += psci.o
diff --git a/arch/arm/cpu/armv7/sunxi/pmic_bus.c b/arch/arm/cpu/armv7/sunxi/pmic_bus.c
new file mode 100644
index 0000000..389144b
--- /dev/null
+++ b/arch/arm/cpu/armv7/sunxi/pmic_bus.c
@@ -0,0 +1,93 @@
+/*
+ * (C) Copyright 2015 Hans de Goede <hdegoede@redhat.com>
+ *
+ * Sunxi PMIC bus access helpers
+ *
+ * The axp152 & axp209 use an i2c bus, the axp221 uses the p2wi bus and the
+ * axp223 uses the rsb bus, these functions abstract this.
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/arch/p2wi.h>
+#include <asm/arch/rsb.h>
+#include <asm/arch/pmic_bus.h>
+
+#define AXP221_CHIP_ADDR 0x68
+#define AXP221_CTRL_ADDR 0x3e
+#define AXP221_INIT_DATA 0x3e
+
+#define AXP223_DEVICE_ADDR 0x3a3
+#define AXP223_RUNTIME_ADDR 0x2d
+
+int pmic_bus_init(void)
+{
+ /* This cannot be 0 because it is used in SPL before BSS is ready */
+ static int needs_init = 1;
+ int ret;
+
+ if (!needs_init)
+ return 0;
+
+#ifdef CONFIG_MACH_SUN6I
+ p2wi_init();
+ ret = p2wi_change_to_p2wi_mode(AXP221_CHIP_ADDR, AXP221_CTRL_ADDR,
+ AXP221_INIT_DATA);
+#else
+ ret = rsb_init();
+ if (ret)
+ return ret;
+
+ ret = rsb_set_device_address(AXP223_DEVICE_ADDR, AXP223_RUNTIME_ADDR);
+#endif
+ if (ret)
+ return ret;
+
+ needs_init = 0;
+ return 0;
+}
+
+int pmic_bus_read(u8 reg, u8 *data)
+{
+#ifdef CONFIG_MACH_SUN6I
+ return p2wi_read(reg, data);
+#else
+ return rsb_read(AXP223_RUNTIME_ADDR, reg, data);
+#endif
+}
+
+int pmic_bus_write(u8 reg, u8 data)
+{
+#ifdef CONFIG_MACH_SUN6I
+ return p2wi_write(reg, data);
+#else
+ return rsb_write(AXP223_RUNTIME_ADDR, reg, data);
+#endif
+}
+
+int pmic_bus_setbits(u8 reg, u8 bits)
+{
+ int ret;
+ u8 val;
+
+ ret = pmic_bus_read(reg, &val);
+ if (ret)
+ return ret;
+
+ val |= bits;
+ return pmic_bus_write(reg, val);
+}
+
+int pmic_bus_clrbits(u8 reg, u8 bits)
+{
+ int ret;
+ u8 val;
+
+ ret = pmic_bus_read(reg, &val);
+ if (ret)
+ return ret;
+
+ val &= ~bits;
+ return pmic_bus_write(reg, val);
+}