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pinctrl: sh-pfc: Add sh_pfc_pin_to_bias_reg() helper

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Add a helper to look up bias registers and bit number for a specific
pin, using the generic bias register description.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
This commit is contained in:
Geert Uytterhoeven 2017-09-29 15:44:38 +02:00
parent beaa34d908
commit acdb124539
2 changed files with 23 additions and 0 deletions
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20
drivers/pinctrl/sh-pfc/core.c
View file

@ -404,6 +404,26 @@ sh_pfc_pin_to_bias_info(const struct sh_pfc_bias_info *info,
return NULL;
}
const struct pinmux_bias_reg *
sh_pfc_pin_to_bias_reg(const struct sh_pfc *pfc, unsigned int pin,
unsigned int *bit)
{
unsigned int i, j;
for (i = 0; pfc->info->bias_regs[i].puen; i++) {
for (j = 0; j < ARRAY_SIZE(pfc->info->bias_regs[i].pins); j++) {
if (pfc->info->bias_regs[i].pins[j] == pin) {
*bit = j;
return &pfc->info->bias_regs[i];
}
}
}
WARN_ONCE(1, "Pin %u is not in bias info list\n", pin);
return NULL;
}
static int sh_pfc_init_ranges(struct sh_pfc *pfc)
{
struct sh_pfc_pin_range *range;

3
drivers/pinctrl/sh-pfc/core.h
View file

@ -35,5 +35,8 @@ int sh_pfc_config_mux(struct sh_pfc *pfc, unsigned mark, int pinmux_type);
const struct sh_pfc_bias_info *
sh_pfc_pin_to_bias_info(const struct sh_pfc_bias_info *info,
unsigned int num, unsigned int pin);
const struct pinmux_bias_reg *
sh_pfc_pin_to_bias_reg(const struct sh_pfc *pfc, unsigned int pin,
unsigned int *bit);
#endif /* __SH_PFC_CORE_H__ */