next-20150925/battery

[karo-tx-linux.git] / include / linux / mfd / axp20x.h

diff --git a/include/linux/mfd/axp20x.h b/include/linux/mfd/axp20x.h
index cc8ad1e1a307bd1cf4eda99ed109dd9e53f178bf..b24c771cebd5c417dc2206553d4b2ecaa47773b5 100644 (file)
--- a/include/linux/mfd/axp20x.h
+++ b/include/linux/mfd/axp20x.h
@@ -11,6 +11,8 @@
 #ifndef __LINUX_MFD_AXP20X_H
 #define __LINUX_MFD_AXP20X_H
 
+#include <linux/regmap.h>
+
 enum {
        AXP152_ID = 0,
        AXP202_ID,
@@ -438,4 +440,26 @@ struct axp288_extcon_pdata {
        struct gpio_desc *gpio_mux_cntl;
 };
 
+/* generic helper function for reading 9-16 bit wide regs */
+static inline int axp20x_read_variable_width(struct regmap *regmap,
+       unsigned int reg, unsigned int width)
+{
+       unsigned int reg_val, result;
+       int err;
+
+       err = regmap_read(regmap, reg, &reg_val);
+       if (err)
+               return err;
+
+       result = reg_val << (width - 8);
+
+       err = regmap_read(regmap, reg + 1, &reg_val);
+       if (err)
+               return err;
+
+       result |= reg_val;
+
+       return result;
+}
+
 #endif /* __LINUX_MFD_AXP20X_H */