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@xxxxxxxxx>
---
drivers/pinctrl/sh-pfc/core.c | 18 ++++++++++++++++++
drivers/pinctrl/sh-pfc/core.h | 3 +++
2 files changed, 21 insertions(+)
diff --git a/drivers/pinctrl/sh-pfc/core.c b/drivers/pinctrl/sh-pfc/core.c
index 1eee3b71cc87ca72..54fae18c32bce3f3 100644
--- a/drivers/pinctrl/sh-pfc/core.c
+++ b/drivers/pinctrl/sh-pfc/core.c
@@ -404,6 +404,24 @@ 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 < 32; 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;
diff --git a/drivers/pinctrl/sh-pfc/core.h b/drivers/pinctrl/sh-pfc/core.h
index b9645a2b22895938..d3e3e92601ce1945 100644
--- a/drivers/pinctrl/sh-pfc/core.h
+++ b/drivers/pinctrl/sh-pfc/core.h
@@ -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__ */
--
2.7.4
