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path: root/drivers/pinctrl/pinctrl-rockchip.c
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Diffstat (limited to 'drivers/pinctrl/pinctrl-rockchip.c')
-rw-r--r--drivers/pinctrl/pinctrl-rockchip.c105
1 files changed, 57 insertions, 48 deletions
diff --git a/drivers/pinctrl/pinctrl-rockchip.c b/drivers/pinctrl/pinctrl-rockchip.c
index e0718b7c4abc..df155f9b2432 100644
--- a/drivers/pinctrl/pinctrl-rockchip.c
+++ b/drivers/pinctrl/pinctrl-rockchip.c
@@ -56,6 +56,12 @@
#define GPIO_EXT_PORT 0x50
#define GPIO_LS_SYNC 0x60
+enum rockchip_pinctrl_type {
+ RK2928,
+ RK3066B,
+ RK3188,
+};
+
/**
* @reg_base: register base of the gpio bank
* @clk: clock of the gpio bank
@@ -98,18 +104,16 @@ struct rockchip_pin_bank {
}
/**
- * @pull_auto: some SoCs don't allow pulls to be specified as up or down, but
- * instead decide this automatically based on the pad-type.
*/
struct rockchip_pin_ctrl {
struct rockchip_pin_bank *pin_banks;
u32 nr_banks;
u32 nr_pins;
char *label;
+ enum rockchip_pinctrl_type type;
int mux_offset;
- int pull_offset;
- bool pull_auto;
- int pull_bank_stride;
+ void (*pull_calc_reg)(struct rockchip_pin_bank *bank, int pin_num,
+ void __iomem **reg, u8 *bit);
};
struct rockchip_pin_config {
@@ -354,6 +358,22 @@ static void rockchip_set_mux(struct rockchip_pin_bank *bank, int pin, int mux)
spin_unlock_irqrestore(&bank->slock, flags);
}
+#define RK2928_PULL_OFFSET 0x118
+#define RK2928_PULL_PINS_PER_REG 16
+#define RK2928_PULL_BANK_STRIDE 8
+
+static void rk2928_calc_pull_reg_and_bit(struct rockchip_pin_bank *bank,
+ int pin_num, void __iomem **reg, u8 *bit)
+{
+ struct rockchip_pinctrl *info = bank->drvdata;
+
+ *reg = info->reg_base + RK2928_PULL_OFFSET;
+ *reg += bank->bank_num * RK2928_PULL_BANK_STRIDE;
+ *reg += (pin_num / RK2928_PULL_PINS_PER_REG) * 4;
+
+ *bit = pin_num % RK2928_PULL_PINS_PER_REG;
+};
+
static int rockchip_get_pull(struct rockchip_pin_bank *bank, int pin_num)
{
struct rockchip_pinctrl *info = bank->drvdata;
@@ -362,23 +382,22 @@ static int rockchip_get_pull(struct rockchip_pin_bank *bank, int pin_num)
u8 bit;
/* rk3066b does support any pulls */
- if (!ctrl->pull_offset)
+ if (ctrl->type == RK3066B)
return PIN_CONFIG_BIAS_DISABLE;
- reg = info->reg_base + ctrl->pull_offset;
-
- if (ctrl->pull_auto) {
- reg += bank->bank_num * ctrl->pull_bank_stride;
- reg += (pin_num / 16) * 4;
- bit = pin_num % 16;
-
+ switch (ctrl->type) {
+ case RK2928:
+ ctrl->pull_calc_reg(bank, pin_num, &reg, &bit);
return !(readl_relaxed(reg) & BIT(bit))
? PIN_CONFIG_BIAS_PULL_PIN_DEFAULT
: PIN_CONFIG_BIAS_DISABLE;
- } else {
+ case RK3188:
dev_err(info->dev, "pull support for rk31xx not implemented\n");
return -EIO;
- }
+ default:
+ dev_err(info->dev, "unsupported pinctrl type\n");
+ return -EINVAL;
+ };
}
static int rockchip_set_pull(struct rockchip_pin_bank *bank,
@@ -395,21 +414,18 @@ static int rockchip_set_pull(struct rockchip_pin_bank *bank,
bank->bank_num, pin_num, pull);
/* rk3066b does support any pulls */
- if (!ctrl->pull_offset)
+ if (ctrl->type == RK3066B)
return pull ? -EINVAL : 0;
- reg = info->reg_base + ctrl->pull_offset;
-
- if (ctrl->pull_auto) {
+ switch (ctrl->type) {
+ case RK2928:
if (pull != PIN_CONFIG_BIAS_PULL_PIN_DEFAULT &&
pull != PIN_CONFIG_BIAS_DISABLE) {
dev_err(info->dev, "only PIN_DEFAULT and DISABLE allowed\n");
return -EINVAL;
}
- reg += bank->bank_num * ctrl->pull_bank_stride;
- reg += (pin_num / 16) * 4;
- bit = pin_num % 16;
+ ctrl->pull_calc_reg(bank, pin_num, &reg, &bit);
spin_lock_irqsave(&bank->slock, flags);
@@ -419,14 +435,13 @@ static int rockchip_set_pull(struct rockchip_pin_bank *bank,
writel(data, reg);
spin_unlock_irqrestore(&bank->slock, flags);
- } else {
- if (pull == PIN_CONFIG_BIAS_PULL_PIN_DEFAULT) {
- dev_err(info->dev, "pull direction (up/down) needs to be specified\n");
- return -EINVAL;
- }
-
+ break;
+ case RK3188:
dev_err(info->dev, "pull support for rk31xx not implemented\n");
return -EIO;
+ default:
+ dev_err(info->dev, "unsupported pinctrl type\n");
+ return -EINVAL;
}
return 0;
@@ -556,20 +571,17 @@ static const struct pinmux_ops rockchip_pmx_ops = {
static bool rockchip_pinconf_pull_valid(struct rockchip_pin_ctrl *ctrl,
enum pin_config_param pull)
{
- /* rk3066b does support any pulls */
- if (!ctrl->pull_offset)
+ switch (ctrl->type) {
+ case RK2928:
+ return (pull == PIN_CONFIG_BIAS_PULL_PIN_DEFAULT ||
+ pull == PIN_CONFIG_BIAS_DISABLE);
+ case RK3066B:
return pull ? false : true;
-
- if (ctrl->pull_auto) {
- if (pull != PIN_CONFIG_BIAS_PULL_PIN_DEFAULT &&
- pull != PIN_CONFIG_BIAS_DISABLE)
- return false;
- } else {
- if (pull == PIN_CONFIG_BIAS_PULL_PIN_DEFAULT)
- return false;
+ case RK3188:
+ return (pull != PIN_CONFIG_BIAS_PULL_PIN_DEFAULT);
}
- return true;
+ return false;
}
/* set the pin config settings for a specified pin */
@@ -1315,10 +1327,9 @@ static struct rockchip_pin_ctrl rk2928_pin_ctrl = {
.pin_banks = rk2928_pin_banks,
.nr_banks = ARRAY_SIZE(rk2928_pin_banks),
.label = "RK2928-GPIO",
+ .type = RK2928,
.mux_offset = 0xa8,
- .pull_offset = 0x118,
- .pull_auto = 1,
- .pull_bank_stride = 8,
+ .pull_calc_reg = rk2928_calc_pull_reg_and_bit,
};
static struct rockchip_pin_bank rk3066a_pin_banks[] = {
@@ -1334,10 +1345,9 @@ static struct rockchip_pin_ctrl rk3066a_pin_ctrl = {
.pin_banks = rk3066a_pin_banks,
.nr_banks = ARRAY_SIZE(rk3066a_pin_banks),
.label = "RK3066a-GPIO",
+ .type = RK2928,
.mux_offset = 0xa8,
- .pull_offset = 0x118,
- .pull_auto = 1,
- .pull_bank_stride = 8,
+ .pull_calc_reg = rk2928_calc_pull_reg_and_bit,
};
static struct rockchip_pin_bank rk3066b_pin_banks[] = {
@@ -1351,8 +1361,8 @@ static struct rockchip_pin_ctrl rk3066b_pin_ctrl = {
.pin_banks = rk3066b_pin_banks,
.nr_banks = ARRAY_SIZE(rk3066b_pin_banks),
.label = "RK3066b-GPIO",
+ .type = RK3066B,
.mux_offset = 0x60,
- .pull_offset = -EINVAL,
};
static struct rockchip_pin_bank rk3188_pin_banks[] = {
@@ -1366,9 +1376,8 @@ static struct rockchip_pin_ctrl rk3188_pin_ctrl = {
.pin_banks = rk3188_pin_banks,
.nr_banks = ARRAY_SIZE(rk3188_pin_banks),
.label = "RK3188-GPIO",
+ .type = RK3188,
.mux_offset = 0x68,
- .pull_offset = 0x164,
- .pull_bank_stride = 16,
};
static const struct of_device_id rockchip_pinctrl_dt_match[] = {
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-09 04:21:10 +0300