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Message-ID: <CAGXv+5H9OTCn033yoi6oxxRKG1G=vbrBK+aw+ZWwGPWbn=uWuA@mail.gmail.com>
Date: Fri, 1 Nov 2024 15:54:58 +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 3/5] pinctrl: mediatek: common: Expose more
configurations to GPIO set_config
On Sat, Oct 26, 2024 at 5:16 AM Nícolas F. R. A. Prado
<nfraprado@...labora.com> wrote:
>
> Currently the set_config callback in the gpio_chip registered by the
> pinctrl-mtk-common 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.
Missing signed-off-by?
Otherwise,
Reviewed-by: Chen-Yu Tsai <wenst@...omium.org>
> ---
> drivers/pinctrl/mediatek/pinctrl-mtk-common.c | 48 ++++++++++++++++-----------
> 1 file changed, 28 insertions(+), 20 deletions(-)
>
> diff --git a/drivers/pinctrl/mediatek/pinctrl-mtk-common.c b/drivers/pinctrl/mediatek/pinctrl-mtk-common.c
> index 91edb539925a49b4302866b9ac36f580cc189fb5..7f9764b474c4e7d0d4c3d6e542bdb7df0264daec 100644
> --- a/drivers/pinctrl/mediatek/pinctrl-mtk-common.c
> +++ b/drivers/pinctrl/mediatek/pinctrl-mtk-common.c
> @@ -62,13 +62,12 @@ static unsigned int mtk_get_port(struct mtk_pinctrl *pctl, unsigned long pin)
> << pctl->devdata->port_shf;
> }
>
> -static int mtk_pmx_gpio_set_direction(struct pinctrl_dev *pctldev,
> - struct pinctrl_gpio_range *range, unsigned offset,
> - bool input)
> +static int mtk_common_pin_set_direction(struct mtk_pinctrl *pctl,
> + unsigned int offset,
> + bool input)
> {
> unsigned int reg_addr;
> unsigned int bit;
> - struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
>
> reg_addr = mtk_get_port(pctl, offset) + pctl->devdata->dir_offset;
> bit = BIT(offset & pctl->devdata->mode_mask);
> @@ -86,6 +85,15 @@ static int mtk_pmx_gpio_set_direction(struct pinctrl_dev *pctldev,
> return 0;
> }
>
> +static int mtk_pmx_gpio_set_direction(struct pinctrl_dev *pctldev,
> + struct pinctrl_gpio_range *range, unsigned int offset,
> + bool input)
> +{
> + struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
> +
> + return mtk_common_pin_set_direction(pctl, offset, input);
> +}
> +
> static void mtk_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
> {
> unsigned int reg_addr;
> @@ -363,12 +371,11 @@ static int mtk_pconf_set_pull_select(struct mtk_pinctrl *pctl,
> return 0;
> }
>
> -static int mtk_pconf_parse_conf(struct pinctrl_dev *pctldev,
> +static int mtk_pconf_parse_conf(struct mtk_pinctrl *pctl,
> unsigned int pin, enum pin_config_param param,
> - enum pin_config_param arg)
> + u32 arg)
> {
> int ret = 0;
> - struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
>
> switch (param) {
> case PIN_CONFIG_BIAS_DISABLE:
> @@ -381,15 +388,15 @@ static int mtk_pconf_parse_conf(struct pinctrl_dev *pctldev,
> ret = mtk_pconf_set_pull_select(pctl, pin, true, false, arg);
> break;
> case PIN_CONFIG_INPUT_ENABLE:
> - mtk_pmx_gpio_set_direction(pctldev, NULL, pin, true);
> + mtk_common_pin_set_direction(pctl, pin, true);
> ret = mtk_pconf_set_ies_smt(pctl, pin, arg, param);
> break;
> case PIN_CONFIG_OUTPUT:
> mtk_gpio_set(pctl->chip, pin, arg);
> - ret = mtk_pmx_gpio_set_direction(pctldev, NULL, pin, false);
> + ret = mtk_common_pin_set_direction(pctl, pin, false);
> break;
> case PIN_CONFIG_INPUT_SCHMITT_ENABLE:
> - mtk_pmx_gpio_set_direction(pctldev, NULL, pin, true);
> + mtk_common_pin_set_direction(pctl, pin, true);
> ret = mtk_pconf_set_ies_smt(pctl, pin, arg, param);
> break;
> case PIN_CONFIG_DRIVE_STRENGTH:
> @@ -421,7 +428,7 @@ static int mtk_pconf_group_set(struct pinctrl_dev *pctldev, unsigned group,
> int i, ret;
>
> for (i = 0; i < num_configs; i++) {
> - ret = mtk_pconf_parse_conf(pctldev, g->pin,
> + ret = mtk_pconf_parse_conf(pctl, g->pin,
> pinconf_to_config_param(configs[i]),
> pinconf_to_config_argument(configs[i]));
> if (ret < 0)
> @@ -870,19 +877,20 @@ static int mtk_gpio_set_config(struct gpio_chip *chip, unsigned offset,
> struct mtk_pinctrl *pctl = gpiochip_get_data(chip);
> const struct mtk_desc_pin *pin;
> unsigned long eint_n;
> - u32 debounce;
> + enum pin_config_param param = pinconf_to_config_param(config);
> + u32 arg = pinconf_to_config_argument(config);
>
> - if (pinconf_to_config_param(config) != PIN_CONFIG_INPUT_DEBOUNCE)
> - return -ENOTSUPP;
> + if (param == PIN_CONFIG_INPUT_DEBOUNCE) {
> + pin = pctl->devdata->pins + offset;
> + if (pin->eint.eintnum == NO_EINT_SUPPORT)
> + return -EINVAL;
>
> - pin = pctl->devdata->pins + offset;
> - if (pin->eint.eintnum == NO_EINT_SUPPORT)
> - return -EINVAL;
> + eint_n = pin->eint.eintnum;
>
> - debounce = pinconf_to_config_argument(config);
> - eint_n = pin->eint.eintnum;
> + return mtk_eint_set_debounce(pctl->eint, eint_n, arg);
> + }
>
> - return mtk_eint_set_debounce(pctl->eint, eint_n, debounce);
> + return mtk_pconf_parse_conf(pctl, offset, param, arg);
> }
>
> static const struct gpio_chip mtk_gpio_chip = {
>
> --
> 2.47.0
>
>
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