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| author | Ben Hutchings <ben.hutchings@codethink.co.uk> | 2015-06-30 17:53:59 +0100 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2015-08-24 10:44:54 +0200 |
| commit | 5b9eaa5659b32cf6c85a492d2e3bfa7a3a413144 (patch) | |
| tree | dbcdccf7c6b25f9459b5e20e6879ca919df08eeb /drivers/pinctrl/sh-pfc/sh_pfc.h | |
| parent | 15ee1f7d1432c8a781df5d8f92c18bd952088667 (diff) | |
| download | linux-5b9eaa5659b32cf6c85a492d2e3bfa7a3a413144.tar.gz linux-5b9eaa5659b32cf6c85a492d2e3bfa7a3a413144.tar.bz2 linux-5b9eaa5659b32cf6c85a492d2e3bfa7a3a413144.zip | |
pinctrl: sh-pfc: Implement pinconf power-source param for voltage switching
The pfc in the R8A7790 (and probably others in the R-Car gen 2 family)
supports switching SDHI signals between 3.3V and 1.8V nominal voltage,
and the SD driver should do that when switching to and from UHS modes.
Add a flag for pins that have configurable I/O voltage and SoC
operations to get and set the nominal voltage. Implement the pinconf
power-source parameter using these operations.
Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/pinctrl/sh-pfc/sh_pfc.h')
| -rw-r--r-- | drivers/pinctrl/sh-pfc/sh_pfc.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/pinctrl/sh-pfc/sh_pfc.h b/drivers/pinctrl/sh-pfc/sh_pfc.h index c7508d5f6886..734f7a92229c 100644 --- a/drivers/pinctrl/sh-pfc/sh_pfc.h +++ b/drivers/pinctrl/sh-pfc/sh_pfc.h @@ -12,6 +12,7 @@ #define __SH_PFC_H #include <linux/bug.h> +#include <linux/pinctrl/pinconf-generic.h> #include <linux/stringify.h> enum { @@ -26,6 +27,7 @@ enum { #define SH_PFC_PIN_CFG_OUTPUT (1 << 1) #define SH_PFC_PIN_CFG_PULL_UP (1 << 2) #define SH_PFC_PIN_CFG_PULL_DOWN (1 << 3) +#define SH_PFC_PIN_CFG_IO_VOLTAGE (1 << 4) #define SH_PFC_PIN_CFG_NO_GPIO (1 << 31) struct sh_pfc_pin { @@ -121,6 +123,9 @@ struct sh_pfc_soc_operations { unsigned int (*get_bias)(struct sh_pfc *pfc, unsigned int pin); void (*set_bias)(struct sh_pfc *pfc, unsigned int pin, unsigned int bias); + int (*get_io_voltage)(struct sh_pfc *pfc, unsigned int pin); + int (*set_io_voltage)(struct sh_pfc *pfc, unsigned int pin, + u16 voltage_mV); }; struct sh_pfc_soc_info { |