[PATCH] pinctrl: rockchip: fix pull setting error for rk3399
Caesar Wang
wxt at rock-chips.com
Tue May 10 04:14:56 PDT 2016
From: David Wu <david.wu at rock-chips.com>
This patch fixes the pinctrl pull bias setting, since the pull up/down
setting is the contrary for gpio0.
>From the TRM said, the gpio0 pull polarity setting:
gpio0a_p (gpio0 )
GPIO0A PE/PS programmation section, every
GPIO bit corresponding to 2bits[PS:PE]
2'b00: Z(Noraml operaton);
2'b11: weak 1(pull-up);
2'b01: weak 0(pull-down);
2'b10: Z(Noraml operaton);
Then, the other gpios setting as the following:
gpio1a_p (gpio1, gpio2, gpio3...)
GPIO1A PU/PD programmation section, every
GPIO bit corresponding to 2bits
2'b00: Z(Noraml operaton);
2'b01: weak 1(pull-up);
2'b10: weak 0(pull-down);
2'b11: Repeater(Bus keeper)
For example,(rk3399evb board)
sdmmc_cd --->gpio0_a7
localhost / # io -r -4 0xff320040
ff320040: 00004d5f
In general,the value should be 0x0000cd5f since the pin set in the dts.
Signed-off-by: David Wu <david.wu at rock-chips.com>
Signed-off-by: Caesar Wang <wxt at rock-chips.com>
Cc: Linus Walleij <linus.walleij at linaro.org>
Cc: Heiko Stuebner <heiko at sntech.de>
Cc: linux-gpio at vger.kernel.org
---
drivers/pinctrl/pinctrl-rockchip.c | 178 ++++++++++++++++++++++++++-----------
1 file changed, 126 insertions(+), 52 deletions(-)
diff --git a/drivers/pinctrl/pinctrl-rockchip.c b/drivers/pinctrl/pinctrl-rockchip.c
index 596b869..38be9c7 100644
--- a/drivers/pinctrl/pinctrl-rockchip.c
+++ b/drivers/pinctrl/pinctrl-rockchip.c
@@ -99,6 +99,15 @@ enum rockchip_pin_drv_type {
};
/**
+ * enum type index corresponding to rockchip_pull_list arrays index.
+ */
+enum rockchip_pin_pull_type {
+ PULL_TYPE_IO_DEFAULT = 0,
+ PULL_TYPE_IO_1V8_ONLY,
+ PULL_TYPE_MAX
+};
+
+/**
* @drv_type: drive strength variant using rockchip_perpin_drv_type
* @offset: if initialized to -1 it will be autocalculated, by specifying
* an initial offset value the relevant source offset can be reset
@@ -123,6 +132,7 @@ struct rockchip_drv {
* @bank_num: number of the bank, to account for holes
* @iomux: array describing the 4 iomux sources of the bank
* @drv: array describing the 4 drive strength sources of the bank
+ * @pull_type: array describing the 4 pull type sources of the bank
* @valid: are all necessary informations present
* @of_node: dt node of this bank
* @drvdata: common pinctrl basedata
@@ -143,6 +153,7 @@ struct rockchip_pin_bank {
u8 bank_num;
struct rockchip_iomux iomux[4];
struct rockchip_drv drv[4];
+ enum rockchip_pin_pull_type pull_type[4];
bool valid;
struct device_node *of_node;
struct rockchip_pinctrl *drvdata;
@@ -198,6 +209,31 @@ struct rockchip_pin_bank {
}, \
}
+#define PIN_BANK_DRV_FLAGS_PULL_FLAGS(id, pins, label, drv0, drv1, \
+ drv2, drv3, pull0, pull1, \
+ pull2, pull3) \
+ { \
+ .bank_num = id, \
+ .nr_pins = pins, \
+ .name = label, \
+ .iomux = { \
+ { .offset = -1 }, \
+ { .offset = -1 }, \
+ { .offset = -1 }, \
+ { .offset = -1 }, \
+ }, \
+ .drv = { \
+ { .drv_type = drv0, .offset = -1 }, \
+ { .drv_type = drv1, .offset = -1 }, \
+ { .drv_type = drv2, .offset = -1 }, \
+ { .drv_type = drv3, .offset = -1 }, \
+ }, \
+ .pull_type[0] = pull0, \
+ .pull_type[1] = pull1, \
+ .pull_type[2] = pull2, \
+ .pull_type[3] = pull3, \
+ }
+
#define PIN_BANK_IOMUX_DRV_FLAGS_OFFSET(id, pins, label, iom0, iom1, \
iom2, iom3, drv0, drv1, drv2, \
drv3, offset0, offset1, \
@@ -220,6 +256,34 @@ struct rockchip_pin_bank {
}, \
}
+#define PIN_BANK_IOMUX_FLAGS_DRV_FLAGS_OFFSET_PULL_FLAGS(id, pins, \
+ label, iom0, iom1, iom2, \
+ iom3, drv0, drv1, drv2, \
+ drv3, offset0, offset1, \
+ offset2, offset3, pull0, \
+ pull1, pull2, pull3) \
+ { \
+ .bank_num = id, \
+ .nr_pins = pins, \
+ .name = label, \
+ .iomux = { \
+ { .type = iom0, .offset = -1 }, \
+ { .type = iom1, .offset = -1 }, \
+ { .type = iom2, .offset = -1 }, \
+ { .type = iom3, .offset = -1 }, \
+ }, \
+ .drv = { \
+ { .drv_type = drv0, .offset = offset0 }, \
+ { .drv_type = drv1, .offset = offset1 }, \
+ { .drv_type = drv2, .offset = offset2 }, \
+ { .drv_type = drv3, .offset = offset3 }, \
+ }, \
+ .pull_type[0] = pull0, \
+ .pull_type[1] = pull1, \
+ .pull_type[2] = pull2, \
+ .pull_type[3] = pull3, \
+ }
+
/**
*/
struct rockchip_pin_ctrl {
@@ -1020,12 +1084,27 @@ static int rockchip_set_drive_perpin(struct rockchip_pin_bank *bank,
return ret;
}
+static int rockchip_pull_list[PULL_TYPE_MAX][4] = {
+ {
+ PIN_CONFIG_BIAS_DISABLE,
+ PIN_CONFIG_BIAS_PULL_UP,
+ PIN_CONFIG_BIAS_PULL_DOWN,
+ PIN_CONFIG_BIAS_BUS_HOLD
+ },
+ {
+ PIN_CONFIG_BIAS_DISABLE,
+ PIN_CONFIG_BIAS_PULL_DOWN,
+ PIN_CONFIG_BIAS_DISABLE,
+ PIN_CONFIG_BIAS_PULL_UP
+ },
+};
+
static int rockchip_get_pull(struct rockchip_pin_bank *bank, int pin_num)
{
struct rockchip_pinctrl *info = bank->drvdata;
struct rockchip_pin_ctrl *ctrl = info->ctrl;
struct regmap *regmap;
- int reg, ret;
+ int reg, ret, pull_type;
u8 bit;
u32 data;
@@ -1048,22 +1127,11 @@ static int rockchip_get_pull(struct rockchip_pin_bank *bank, int pin_num)
case RK3288:
case RK3368:
case RK3399:
+ pull_type = bank->pull_type[pin_num / 8];
data >>= bit;
data &= (1 << RK3188_PULL_BITS_PER_PIN) - 1;
- switch (data) {
- case 0:
- return PIN_CONFIG_BIAS_DISABLE;
- case 1:
- return PIN_CONFIG_BIAS_PULL_UP;
- case 2:
- return PIN_CONFIG_BIAS_PULL_DOWN;
- case 3:
- return PIN_CONFIG_BIAS_BUS_HOLD;
- }
-
- dev_err(info->dev, "unknown pull setting\n");
- return -EIO;
+ return rockchip_pull_list[pull_type][data];
default:
dev_err(info->dev, "unsupported pinctrl type\n");
return -EINVAL;
@@ -1076,7 +1144,7 @@ static int rockchip_set_pull(struct rockchip_pin_bank *bank,
struct rockchip_pinctrl *info = bank->drvdata;
struct rockchip_pin_ctrl *ctrl = info->ctrl;
struct regmap *regmap;
- int reg, ret;
+ int reg, ret, i, pull_type;
unsigned long flags;
u8 bit;
u32 data, rmask;
@@ -1105,30 +1173,27 @@ static int rockchip_set_pull(struct rockchip_pin_bank *bank,
case RK3288:
case RK3368:
case RK3399:
+ pull_type = bank->pull_type[pin_num / 8];
+ ret = -EINVAL;
+ for (i = 0; i < ARRAY_SIZE(rockchip_pull_list[pull_type]);
+ i++) {
+ if (rockchip_pull_list[pull_type][i] == pull) {
+ ret = i;
+ break;
+ }
+ }
+
+ if (ret < 0) {
+ dev_err(info->dev, "unknown pull setting %d\n", pull);
+ return ret;
+ }
+
spin_lock_irqsave(&bank->slock, flags);
/* enable the write to the equivalent lower bits */
data = ((1 << RK3188_PULL_BITS_PER_PIN) - 1) << (bit + 16);
rmask = data | (data >> 16);
-
- switch (pull) {
- case PIN_CONFIG_BIAS_DISABLE:
- break;
- case PIN_CONFIG_BIAS_PULL_UP:
- data |= (1 << bit);
- break;
- case PIN_CONFIG_BIAS_PULL_DOWN:
- data |= (2 << bit);
- break;
- case PIN_CONFIG_BIAS_BUS_HOLD:
- data |= (3 << bit);
- break;
- default:
- spin_unlock_irqrestore(&bank->slock, flags);
- dev_err(info->dev, "unsupported pull setting %d\n",
- pull);
- return -EINVAL;
- }
+ data |= (ret << bit);
ret = regmap_update_bits(regmap, reg, rmask, data);
@@ -2552,19 +2617,24 @@ static struct rockchip_pin_ctrl rk3368_pin_ctrl = {
};
static struct rockchip_pin_bank rk3399_pin_banks[] = {
- PIN_BANK_IOMUX_DRV_FLAGS_OFFSET(0, 32, "gpio0", IOMUX_SOURCE_PMU,
- IOMUX_SOURCE_PMU,
- IOMUX_SOURCE_PMU,
- IOMUX_SOURCE_PMU,
- DRV_TYPE_IO_1V8_ONLY,
- DRV_TYPE_IO_1V8_ONLY,
- DRV_TYPE_IO_DEFAULT,
- DRV_TYPE_IO_DEFAULT,
- 0x0,
- 0x8,
- -1,
- -1
- ),
+ PIN_BANK_IOMUX_FLAGS_DRV_FLAGS_OFFSET_PULL_FLAGS(0, 32, "gpio0",
+ IOMUX_SOURCE_PMU,
+ IOMUX_SOURCE_PMU,
+ IOMUX_SOURCE_PMU,
+ IOMUX_SOURCE_PMU,
+ DRV_TYPE_IO_1V8_ONLY,
+ DRV_TYPE_IO_1V8_ONLY,
+ DRV_TYPE_IO_DEFAULT,
+ DRV_TYPE_IO_DEFAULT,
+ 0x0,
+ 0x8,
+ -1,
+ -1,
+ PULL_TYPE_IO_1V8_ONLY,
+ PULL_TYPE_IO_1V8_ONLY,
+ PULL_TYPE_IO_DEFAULT,
+ PULL_TYPE_IO_DEFAULT
+ ),
PIN_BANK_IOMUX_DRV_FLAGS_OFFSET(1, 32, "gpio1", IOMUX_SOURCE_PMU,
IOMUX_SOURCE_PMU,
IOMUX_SOURCE_PMU,
@@ -2578,11 +2648,15 @@ static struct rockchip_pin_bank rk3399_pin_banks[] = {
0x30,
0x38
),
- PIN_BANK_DRV_FLAGS(2, 32, "gpio2", DRV_TYPE_IO_1V8_OR_3V0,
- DRV_TYPE_IO_1V8_OR_3V0,
- DRV_TYPE_IO_1V8_ONLY,
- DRV_TYPE_IO_1V8_ONLY
- ),
+ PIN_BANK_DRV_FLAGS_PULL_FLAGS(2, 32, "gpio2", DRV_TYPE_IO_1V8_OR_3V0,
+ DRV_TYPE_IO_1V8_OR_3V0,
+ DRV_TYPE_IO_1V8_ONLY,
+ DRV_TYPE_IO_1V8_ONLY,
+ PULL_TYPE_IO_DEFAULT,
+ PULL_TYPE_IO_DEFAULT,
+ PULL_TYPE_IO_1V8_ONLY,
+ PULL_TYPE_IO_1V8_ONLY
+ ),
PIN_BANK_DRV_FLAGS(3, 32, "gpio3", DRV_TYPE_IO_3V3_ONLY,
DRV_TYPE_IO_3V3_ONLY,
DRV_TYPE_IO_3V3_ONLY,
--
1.9.1
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