From: Lad Prabhakar <prabhakar.mahadev-lad.rj@xxxxxxxxxxxxxx>
Add support to configure bias-disable, bias-pull-up and bias-pull-down
properties of the pin.
Two new function pointers get_bias_param() and get_bias_val() are
introduced as the values in PUPD register differ when compared to
RZ/G2L family and RZ/V2H(P) SoC,
Value | RZ/G2L | RZ/V2H
---------------------------------
00b: | Bias Disabled | Pull up/down disabled
01b: | Pull-up | Pull up/down disabled
10b: | Pull-down | Pull-down
11b: | Prohibited | Pull-up
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@xxxxxxxxxxxxxx>
---
RFC->v2
- New patch
---
drivers/pinctrl/renesas/pinctrl-rzg2l.c | 73 +++++++++++++++++++++++++
1 file changed, 73 insertions(+)
diff --git a/drivers/pinctrl/renesas/pinctrl-rzg2l.c b/drivers/pinctrl/renesas/pinctrl-rzg2l.c
index 102fa75c71d3..c144bf43522b 100644
--- a/drivers/pinctrl/renesas/pinctrl-rzg2l.c
+++ b/drivers/pinctrl/renesas/pinctrl-rzg2l.c
@@ -122,6 +122,7 @@
#define IOLH(off) (0x1000 + (off) * 8)
#define SR(off) (0x1400 + (off) * 8)
#define IEN(off) (0x1800 + (off) * 8)
+#define PUPD(off) (0x1C00 + (off) * 8)
#define ISEL(off) (0x2C00 + (off) * 8)
#define SD_CH(off, ch) ((off) + (ch) * 4)
#define ETH_POC(off, ch) ((off) + (ch) * 4)
@@ -140,6 +141,7 @@
#define IEN_MASK 0x01
#define IOLH_MASK 0x03
#define SR_MASK 0x01
+#define PUPD_MASK 0x03
#define PM_INPUT 0x1
#define PM_OUTPUT 0x2
@@ -265,6 +267,8 @@ struct rzg2l_pinctrl_data {
void (*pmc_writeb)(struct rzg2l_pinctrl *pctrl, u8 val, void __iomem *addr);
u32 (*read_oen)(struct rzg2l_pinctrl *pctrl, u32 caps, u32 offset, u8 pin);
int (*write_oen)(struct rzg2l_pinctrl *pctrl, u32 caps, u32 offset, u8 pin, u8 oen);
+ int (*get_bias_param)(u8 val);
+ int (*get_bias_val)(enum pin_config_param param);
};
/**
@@ -1081,6 +1085,38 @@ static int rzg2l_write_oen(struct rzg2l_pinctrl *pctrl, u32 caps, u32 offset, u8
return 0;
}
+static int rzg2l_get_bias_param(u8 val)
+{
+ switch (val) {
+ case 0:
+ return PIN_CONFIG_BIAS_DISABLE;
+ case 1:
+ return PIN_CONFIG_BIAS_PULL_UP;
+ case 2:
+ return PIN_CONFIG_BIAS_PULL_DOWN;
+ default:
+ break;
+ }
+
+ return -EINVAL;
+}
+
+static int rzg2l_get_bias_val(enum pin_config_param param)
+{
+ switch (param) {
+ case PIN_CONFIG_BIAS_DISABLE:
+ return 0;
+ case PIN_CONFIG_BIAS_PULL_UP:
+ return 1;
+ case PIN_CONFIG_BIAS_PULL_DOWN:
+ return 2;
+ default:
+ break;
+ }
+
+ return -EINVAL;
+}
+
static int rzg2l_pinctrl_pinconf_get(struct pinctrl_dev *pctldev,
unsigned int _pin,
unsigned long *config)
@@ -1139,6 +1175,25 @@ static int rzg2l_pinctrl_pinconf_get(struct pinctrl_dev *pctldev,
arg = rzg2l_read_pin_config(pctrl, SR(off), bit, SR_MASK);
break;
+ case PIN_CONFIG_BIAS_DISABLE:
+ case PIN_CONFIG_BIAS_PULL_UP:
+ case PIN_CONFIG_BIAS_PULL_DOWN: {
+ if (!(cfg & PIN_CFG_PUPD))
+ return -EINVAL;
+
+ ret = pctrl->data->get_bias_param(rzg2l_read_pin_config(pctrl,
+ PUPD(off),
+ bit, PUPD_MASK));
+ if (ret < 0)
+ return ret;
+
+ if (ret != param)
+ return -EINVAL;
+ /* for PIN_CONFIG_BIAS_PULL_UP/DOWN when enabled we just return 1 */
+ arg = 1;
+ break;
+ }
+
case PIN_CONFIG_DRIVE_STRENGTH: {
unsigned int index;
@@ -1254,6 +1309,20 @@ static int rzg2l_pinctrl_pinconf_set(struct pinctrl_dev *pctldev,
rzg2l_rmw_pin_config(pctrl, SR(off), bit, SR_MASK, arg);
break;
+ case PIN_CONFIG_BIAS_DISABLE:
+ case PIN_CONFIG_BIAS_PULL_UP:
+ case PIN_CONFIG_BIAS_PULL_DOWN: {
+ if (!(cfg & PIN_CFG_PUPD))
+ return -EINVAL;
+
+ ret = pctrl->data->get_bias_val(param);
+ if (ret < 0)
+ return ret;
+
+ rzg2l_rmw_pin_config(pctrl, PUPD(off), bit, PUPD_MASK, ret);
+ break;
+ }
+
case PIN_CONFIG_DRIVE_STRENGTH:
arg = pinconf_to_config_argument(_configs[i]);
@@ -2746,6 +2815,8 @@ static struct rzg2l_pinctrl_data r9a07g044_data = {
.pmc_writeb = &rzg2l_pmc_writeb,
.read_oen = &rzg2l_read_oen,
.write_oen = &rzg2l_write_oen,
+ .get_bias_param = &rzg2l_get_bias_param,
+ .get_bias_val = &rzg2l_get_bias_val,
};
static struct rzg2l_pinctrl_data r9a08g045_data = {
@@ -2761,6 +2832,8 @@ static struct rzg2l_pinctrl_data r9a08g045_data = {
.pmc_writeb = &rzg2l_pmc_writeb,
.read_oen = &rzg2l_read_oen,
.write_oen = &rzg2l_write_oen,
+ .get_bias_param = &rzg2l_get_bias_param,
+ .get_bias_val = &rzg2l_get_bias_val,
};
static const struct of_device_id rzg2l_pinctrl_of_table[] = {
--
2.34.1
