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pinctrl: mediatek: Add support for pin configuration dump via debugfs.

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Add support for pin configuration dump via catting
/sys/kernel/debug/pinctrl/$platform_dependent_path/pinconf-pins.
pinctrl framework had already support such dump. This patch implement the
operation function pointer to fullfill this dump.

Signed-off-by: Light Hsieh <light.hsieh@mediatek.com>
Link: https://lore.kernel.org/r/1579675994-7001-6-git-send-email-light.hsieh@mediatek.com
Acked-by: Sean Wang <sean.wang@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Light Hsieh 2020-01-22 14:53:14 +08:00 committed by Linus Walleij
parent cafe19db77
commit 184d8e13f9
2 changed files with 112 additions and 0 deletions
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109
drivers/pinctrl/mediatek/pinctrl-paris.c
View File

@ -539,12 +539,120 @@ static int mtk_pctrl_get_group_pins(struct pinctrl_dev *pctldev,
return 0;
}
static int mtk_hw_get_value_wrap(struct mtk_pinctrl *hw, unsigned int gpio, int field)
{
const struct mtk_pin_desc *desc;
int value, err;
if (gpio > hw->soc->npins)
return -EINVAL;
desc = (const struct mtk_pin_desc *)&hw->soc->pins[gpio];
err = mtk_hw_get_value(hw, desc, field, &value);
if (err)
return err;
return value;
}
#define mtk_pctrl_get_pinmux(hw, gpio) \
mtk_hw_get_value_wrap(hw, gpio, PINCTRL_PIN_REG_MODE)
#define mtk_pctrl_get_direction(hw, gpio) \
mtk_hw_get_value_wrap(hw, gpio, PINCTRL_PIN_REG_DIR)
#define mtk_pctrl_get_out(hw, gpio) \
mtk_hw_get_value_wrap(hw, gpio, PINCTRL_PIN_REG_DO)
#define mtk_pctrl_get_in(hw, gpio) \
mtk_hw_get_value_wrap(hw, gpio, PINCTRL_PIN_REG_DI)
#define mtk_pctrl_get_smt(hw, gpio) \
mtk_hw_get_value_wrap(hw, gpio, PINCTRL_PIN_REG_SMT)
#define mtk_pctrl_get_ies(hw, gpio) \
mtk_hw_get_value_wrap(hw, gpio, PINCTRL_PIN_REG_IES)
#define mtk_pctrl_get_driving(hw, gpio) \
mtk_hw_get_value_wrap(hw, gpio, PINCTRL_PIN_REG_DRV)
ssize_t mtk_pctrl_show_one_pin(struct mtk_pinctrl *hw,
unsigned int gpio, char *buf, unsigned int bufLen)
{
int pinmux, pullup, pullen, len = 0, r1 = -1, r0 = -1;
const struct mtk_pin_desc *desc;
if (gpio > hw->soc->npins)
return -EINVAL;
desc = (const struct mtk_pin_desc *)&hw->soc->pins[gpio];
pinmux = mtk_pctrl_get_pinmux(hw, gpio);
if (pinmux >= hw->soc->nfuncs)
pinmux -= hw->soc->nfuncs;
mtk_pinconf_bias_get_combo(hw, desc, &pullup, &pullen);
if (pullen == MTK_PUPD_SET_R1R0_00) {
pullen = 0;
r1 = 0;
r0 = 0;
} else if (pullen == MTK_PUPD_SET_R1R0_01) {
pullen = 1;
r1 = 0;
r0 = 1;
} else if (pullen == MTK_PUPD_SET_R1R0_10) {
pullen = 1;
r1 = 1;
r0 = 0;
} else if (pullen == MTK_PUPD_SET_R1R0_11) {
pullen = 1;
r1 = 1;
r0 = 1;
} else if (pullen != MTK_DISABLE && pullen != MTK_ENABLE) {
pullen = 0;
}
len += snprintf(buf + len, bufLen - len,
"%03d: %1d%1d%1d%1d%02d%1d%1d%1d%1d",
gpio,
pinmux,
mtk_pctrl_get_direction(hw, gpio),
mtk_pctrl_get_out(hw, gpio),
mtk_pctrl_get_in(hw, gpio),
mtk_pctrl_get_driving(hw, gpio),
mtk_pctrl_get_smt(hw, gpio),
mtk_pctrl_get_ies(hw, gpio),
pullen,
pullup);
if (r1 != -1) {
len += snprintf(buf + len, bufLen - len, " (%1d %1d)\n",
r1, r0);
} else {
len += snprintf(buf + len, bufLen - len, "\n");
}
return len;
}
#define PIN_DBG_BUF_SZ 96
static void mtk_pctrl_dbg_show(struct pinctrl_dev *pctldev, struct seq_file *s,
unsigned int gpio)
{
struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev);
char buf[PIN_DBG_BUF_SZ];
(void)mtk_pctrl_show_one_pin(hw, gpio, buf, PIN_DBG_BUF_SZ);
seq_printf(s, "%s", buf);
}
static const struct pinctrl_ops mtk_pctlops = {
.dt_node_to_map = mtk_pctrl_dt_node_to_map,
.dt_free_map = pinctrl_utils_free_map,
.get_groups_count = mtk_pctrl_get_groups_count,
.get_group_name = mtk_pctrl_get_group_name,
.get_group_pins = mtk_pctrl_get_group_pins,
.pin_dbg_show = mtk_pctrl_dbg_show,
};
static int mtk_pmx_get_funcs_cnt(struct pinctrl_dev *pctldev)
@ -641,6 +749,7 @@ static const struct pinconf_ops mtk_confops = {
.pin_config_get = mtk_pinconf_get,
.pin_config_group_get = mtk_pconf_group_get,
.pin_config_group_set = mtk_pconf_group_set,
.is_generic = true,
};
static struct pinctrl_desc mtk_desc = {

3
drivers/pinctrl/mediatek/pinctrl-paris.h
View File

@ -60,6 +60,9 @@
int mtk_paris_pinctrl_probe(struct platform_device *pdev,
const struct mtk_pin_soc *soc);
ssize_t mtk_pctrl_show_one_pin(struct mtk_pinctrl *hw,
unsigned int gpio, char *buf, unsigned int bufLen);
extern const struct dev_pm_ops mtk_paris_pinctrl_pm_ops;
#endif /* __PINCTRL_PARIS_H */