diff options
| author | Hans de Goede <hdegoede@redhat.com> | 2015-08-01 11:39:38 +0300 |
|---|---|---|
| committer | Sebastian Reichel <sre@kernel.org> | 2015-09-22 14:35:28 +0300 |
| commit | 69fb4dcada7704beeba86e3f401a66c726aa8504 (patch) | |
| tree | f5e8a7cb8e77116447c44234f6235925ea9e508e /include | |
| parent | 264905209a58779566a1d80c96110eea69b09440 (diff) | |
| download | linux-69fb4dcada7704beeba86e3f401a66c726aa8504.tar.xz | |
power: Add an axp20x-usb-power driver
This adds a driver for the usb power_supply bits of the axp20x PMICs.
I initially started writing my own driver, before coming aware of
Bruno Prémont's excellent earlier RFC with a driver for this.
My driver was lacking CURRENT_MAX and VOLTAGE_MIN support Bruno's
drvier has, so I've copied the code for those from his driver.
Note that the AC-power-supply and battery charger bits will need separate
drivers. Each one needs its own devictree child-node so that other
devicetree nodes can reference the right power-supply, and thus each one
will get its own mfd-cell / platform_device and platform-driver.
Cc: Bruno Prémont <bonbons@linux-vserver.org>
Acked-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Bruno Prémont <bonbons@linux-vserver.org>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/mfd/axp20x.h | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/include/linux/mfd/axp20x.h b/include/linux/mfd/axp20x.h index cc8ad1e1a307..b24c771cebd5 100644 --- 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, ®_val); + if (err) + return err; + + result = reg_val << (width - 8); + + err = regmap_read(regmap, reg + 1, ®_val); + if (err) + return err; + + result |= reg_val; + + return result; +} + #endif /* __LINUX_MFD_AXP20X_H */ |