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Message-ID: <CAGXv+5EW+eo6yM0YCPikHLQeh0H26RJ5TC5Mf2NxmB1e_teRSw@mail.gmail.com>
Date: Fri, 1 Nov 2024 15:54:12 +0800
From: Chen-Yu Tsai <wenst@...omium.org>
To: Nícolas F. R. A. Prado <nfraprado@...labora.com>
Cc: Sean Wang <sean.wang@...nel.org>, Linus Walleij <linus.walleij@...aro.org>,
Matthias Brugger <matthias.bgg@...il.com>,
AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
Bamvor Jian Zhang <bamv2005@...il.com>, Shuah Khan <shuah@...nel.org>, kernel@...labora.com,
linux-mediatek@...ts.infradead.org, linux-gpio@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
linux-kselftest@...r.kernel.org, kernelci@...ts.linux.dev
Subject: Re: [PATCH RFC v2 2/5] pinctrl: mediatek: moore: Expose more
configurations to GPIO set_config
On Sat, Oct 26, 2024 at 4:14 AM Nícolas F. R. A. Prado
<nfraprado@...labora.com> wrote:
>
> Currently the set_config callback in the gpio_chip registered by the
> pinctrl_moore driver only supports configuring a single parameter on
> specific pins (the input debounce of the EINT controller, on pins that
> support it), even though many other configurations are already
> implemented and available through the pinctrl API for configuration of
> pins by the Devicetree and other drivers.
>
> Expose all configurations currently implemented through the GPIO API so
> they can also be set from userspace, which is particularly useful to
> allow testing them from userspace.
>
> Signed-off-by: Nícolas F. R. A. Prado <nfraprado@...labora.com>
Reviewed-by: Chen-Yu Tsai <wenst@...omium.org>
> ---
> drivers/pinctrl/mediatek/pinctrl-moore.c | 283 ++++++++++++++++---------------
> 1 file changed, 144 insertions(+), 139 deletions(-)
>
> diff --git a/drivers/pinctrl/mediatek/pinctrl-moore.c b/drivers/pinctrl/mediatek/pinctrl-moore.c
> index aad4891223d3e060431a990bfabb6bd2cbb82087..de3494e9f228cef7f2eadf6a6ea2b3b708f1fb25 100644
> --- a/drivers/pinctrl/mediatek/pinctrl-moore.c
> +++ b/drivers/pinctrl/mediatek/pinctrl-moore.c
> @@ -246,156 +246,160 @@ static int mtk_pinconf_get(struct pinctrl_dev *pctldev,
> return 0;
> }
>
> -static int mtk_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin,
> - unsigned long *configs, unsigned int num_configs)
> +static int mtk_moore_pin_config_set(struct mtk_pinctrl *hw, unsigned int pin,
> + enum pin_config_param param, u32 arg)
> {
> - struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev);
> const struct mtk_pin_desc *desc;
> - u32 reg, param, arg;
> - int cfg, err = 0;
> + u32 reg;
> + int err = 0;
>
> desc = (const struct mtk_pin_desc *)&hw->soc->pins[pin];
> if (!desc->name)
> return -ENOTSUPP;
>
> - for (cfg = 0; cfg < num_configs; cfg++) {
> - param = pinconf_to_config_param(configs[cfg]);
> - arg = pinconf_to_config_argument(configs[cfg]);
> -
> - switch (param) {
> - case PIN_CONFIG_BIAS_DISABLE:
> - if (hw->soc->bias_set_combo) {
> - err = hw->soc->bias_set_combo(hw, desc, 0, MTK_DISABLE);
> - if (err)
> - return err;
> - } else if (hw->soc->bias_disable_set) {
> - err = hw->soc->bias_disable_set(hw, desc);
> - if (err)
> - return err;
> - } else {
> - return -ENOTSUPP;
> - }
> - break;
> - case PIN_CONFIG_BIAS_PULL_UP:
> - if (hw->soc->bias_set_combo) {
> - err = hw->soc->bias_set_combo(hw, desc, 1, arg);
> - if (err)
> - return err;
> - } else if (hw->soc->bias_set) {
> - err = hw->soc->bias_set(hw, desc, 1);
> - if (err)
> - return err;
> - } else {
> - return -ENOTSUPP;
> - }
> - break;
> - case PIN_CONFIG_BIAS_PULL_DOWN:
> - if (hw->soc->bias_set_combo) {
> - err = hw->soc->bias_set_combo(hw, desc, 0, arg);
> - if (err)
> - return err;
> - } else if (hw->soc->bias_set) {
> - err = hw->soc->bias_set(hw, desc, 0);
> - if (err)
> - return err;
> - } else {
> - return -ENOTSUPP;
> - }
> - break;
> - case PIN_CONFIG_OUTPUT_ENABLE:
> - err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_SMT,
> - MTK_DISABLE);
> - if (err)
> - goto err;
> -
> - err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DIR,
> - MTK_OUTPUT);
> + switch ((u32)param) {
> + case PIN_CONFIG_BIAS_DISABLE:
> + if (hw->soc->bias_set_combo) {
> + err = hw->soc->bias_set_combo(hw, desc, 0, MTK_DISABLE);
> if (err)
> - goto err;
> - break;
> - case PIN_CONFIG_INPUT_ENABLE:
> -
> - if (hw->soc->ies_present) {
> - mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_IES,
> - MTK_ENABLE);
> - }
> -
> - err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DIR,
> - MTK_INPUT);
> + return err;
> + } else if (hw->soc->bias_disable_set) {
> + err = hw->soc->bias_disable_set(hw, desc);
> if (err)
> - goto err;
> - break;
> - case PIN_CONFIG_SLEW_RATE:
> - err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_SR,
> - arg);
> + return err;
> + } else {
> + return -ENOTSUPP;
> + }
> + break;
> + case PIN_CONFIG_BIAS_PULL_UP:
> + if (hw->soc->bias_set_combo) {
> + err = hw->soc->bias_set_combo(hw, desc, 1, arg);
> if (err)
> - goto err;
> -
> - break;
> - case PIN_CONFIG_OUTPUT:
> - err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DIR,
> - MTK_OUTPUT);
> + return err;
> + } else if (hw->soc->bias_set) {
> + err = hw->soc->bias_set(hw, desc, 1);
> if (err)
> - goto err;
> -
> - err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DO,
> - arg);
> + return err;
> + } else {
> + return -ENOTSUPP;
> + }
> + break;
> + case PIN_CONFIG_BIAS_PULL_DOWN:
> + if (hw->soc->bias_set_combo) {
> + err = hw->soc->bias_set_combo(hw, desc, 0, arg);
> if (err)
> - goto err;
> - break;
> - case PIN_CONFIG_INPUT_SCHMITT_ENABLE:
> - /* arg = 1: Input mode & SMT enable ;
> - * arg = 0: Output mode & SMT disable
> - */
> - arg = arg ? 2 : 1;
> - err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DIR,
> - arg & 1);
> + return err;
> + } else if (hw->soc->bias_set) {
> + err = hw->soc->bias_set(hw, desc, 0);
> if (err)
> - goto err;
> + return err;
> + } else {
> + return -ENOTSUPP;
> + }
> + break;
> + case PIN_CONFIG_OUTPUT_ENABLE:
> + err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_SMT, MTK_DISABLE);
> + if (err)
> + return err;
> +
> + err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DIR, MTK_OUTPUT);
> + if (err)
> + return err;
> + break;
> + case PIN_CONFIG_INPUT_ENABLE:
> +
> + if (hw->soc->ies_present) {
> + mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_IES, MTK_ENABLE);
> + }
> +
> + err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DIR, MTK_INPUT);
> + if (err)
> + return err;
> + break;
> + case PIN_CONFIG_SLEW_RATE:
> + err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_SR, arg);
> + if (err)
> + return err;
> +
> + break;
> + case PIN_CONFIG_OUTPUT:
> + err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DIR, MTK_OUTPUT);
> + if (err)
> + return err;
> +
> + err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DO, arg);
> + if (err)
> + return err;
> + break;
> + case PIN_CONFIG_INPUT_SCHMITT_ENABLE:
> + /* arg = 1: Input mode & SMT enable ;
> + * arg = 0: Output mode & SMT disable
> + */
> + arg = arg ? 2 : 1;
> + err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DIR, arg & 1);
> + if (err)
> + return err;
>
> - err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_SMT,
> - !!(arg & 2));
> + err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_SMT, !!(arg & 2));
> + if (err)
> + return err;
> + break;
> + case PIN_CONFIG_DRIVE_STRENGTH:
> + if (hw->soc->drive_set) {
> + err = hw->soc->drive_set(hw, desc, arg);
> if (err)
> - goto err;
> - break;
> - case PIN_CONFIG_DRIVE_STRENGTH:
> - if (hw->soc->drive_set) {
> - err = hw->soc->drive_set(hw, desc, arg);
> - if (err)
> - return err;
> - } else {
> - err = -ENOTSUPP;
> - }
> - break;
> - case MTK_PIN_CONFIG_TDSEL:
> - case MTK_PIN_CONFIG_RDSEL:
> - reg = (param == MTK_PIN_CONFIG_TDSEL) ?
> - PINCTRL_PIN_REG_TDSEL : PINCTRL_PIN_REG_RDSEL;
> -
> - err = mtk_hw_set_value(hw, desc, reg, arg);
> + return err;
> + } else {
> + return -ENOTSUPP;
> + }
> + break;
> + case MTK_PIN_CONFIG_TDSEL:
> + case MTK_PIN_CONFIG_RDSEL:
> + reg = (param == MTK_PIN_CONFIG_TDSEL) ?
> + PINCTRL_PIN_REG_TDSEL : PINCTRL_PIN_REG_RDSEL;
> +
> + err = mtk_hw_set_value(hw, desc, reg, arg);
> + if (err)
> + return err;
> + break;
> + case MTK_PIN_CONFIG_PU_ADV:
> + case MTK_PIN_CONFIG_PD_ADV:
> + if (hw->soc->adv_pull_set) {
> + bool pullup;
> +
> + pullup = param == MTK_PIN_CONFIG_PU_ADV;
> + err = hw->soc->adv_pull_set(hw, desc, pullup, arg);
> if (err)
> - goto err;
> - break;
> - case MTK_PIN_CONFIG_PU_ADV:
> - case MTK_PIN_CONFIG_PD_ADV:
> - if (hw->soc->adv_pull_set) {
> - bool pullup;
> -
> - pullup = param == MTK_PIN_CONFIG_PU_ADV;
> - err = hw->soc->adv_pull_set(hw, desc, pullup,
> - arg);
> - if (err)
> - return err;
> - } else {
> - return -ENOTSUPP;
> - }
> - break;
> - default:
> - err = -ENOTSUPP;
> + return err;
> + } else {
> + return -ENOTSUPP;
> }
> + break;
> + default:
> + return -ENOTSUPP;
> + }
> +
> + return 0;
> +}
> +
> +static int mtk_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin,
> + unsigned long *configs, unsigned int num_configs)
> +{
> + struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev);
> + enum pin_config_param param;
> + int cfg, err = 0;
> + u32 arg;
> +
> + for (cfg = 0; cfg < num_configs; cfg++) {
> + param = pinconf_to_config_param(configs[cfg]);
> + arg = pinconf_to_config_argument(configs[cfg]);
> +
> + err = mtk_moore_pin_config_set(hw, pin, param, arg);
> + if (err)
> + return err;
> }
> -err:
> - return err;
> +
> + return 0;
> }
>
> static int mtk_pinconf_group_get(struct pinctrl_dev *pctldev,
> @@ -539,20 +543,21 @@ static int mtk_gpio_set_config(struct gpio_chip *chip, unsigned int offset,
> {
> struct mtk_pinctrl *hw = gpiochip_get_data(chip);
> const struct mtk_pin_desc *desc;
> - u32 debounce;
> + enum pin_config_param param = pinconf_to_config_param(config);
> + u32 arg = pinconf_to_config_argument(config);
>
> desc = (const struct mtk_pin_desc *)&hw->soc->pins[offset];
> if (!desc->name)
> return -ENOTSUPP;
>
> - if (!hw->eint ||
> - pinconf_to_config_param(config) != PIN_CONFIG_INPUT_DEBOUNCE ||
> - desc->eint.eint_n == (u16)EINT_NA)
> - return -ENOTSUPP;
> + if (param == PIN_CONFIG_INPUT_DEBOUNCE) {
> + if (!hw->eint || desc->eint.eint_n == (u16)EINT_NA)
> + return -ENOTSUPP;
>
> - debounce = pinconf_to_config_argument(config);
> + return mtk_eint_set_debounce(hw->eint, desc->eint.eint_n, arg);
> + }
>
> - return mtk_eint_set_debounce(hw->eint, desc->eint.eint_n, debounce);
> + return mtk_moore_pin_config_set(hw, offset, param, arg);
> }
>
> static int mtk_build_gpiochip(struct mtk_pinctrl *hw)
>
> --
> 2.47.0
>
>
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