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SubjectRe: [PATCH v1 1/3] thermal: rockchip: add pinctrl control
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Date
On 01/04/2019 08:43, Elaine Zhang wrote:
> Based on the TSADC Tshut mode to select pinctrl,
> instead of setting pinctrl based on architecture
> (Not depends on pinctrl setting by "init" or "default").
> And it requires setting the tshut polarity before select pinctrl.

I'm not sure to fully read the description. Can you rephrase/elaborate
the changelog?

> Signed-off-by: Elaine Zhang <zhangqing@rock-chips.com>
> ---
> drivers/thermal/rockchip_thermal.c | 61 +++++++++++++++++++++++++++++++-------
> 1 file changed, 50 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/thermal/rockchip_thermal.c b/drivers/thermal/rockchip_thermal.c
> index 9c7643d62ed7..faa6c7792155 100644
> --- a/drivers/thermal/rockchip_thermal.c
> +++ b/drivers/thermal/rockchip_thermal.c
> @@ -34,7 +34,7 @@
> */
> enum tshut_mode {
> TSHUT_MODE_CRU = 0,
> - TSHUT_MODE_GPIO,
> + TSHUT_MODE_OTP,

Why do you change the enum name? The impact on the patch is much higher,
no ?

> };
>
> /**
> @@ -172,6 +172,9 @@ struct rockchip_thermal_data {
> int tshut_temp;
> enum tshut_mode tshut_mode;
> enum tshut_polarity tshut_polarity;
> + struct pinctrl *pinctrl;
> + struct pinctrl_state *gpio_state;
> + struct pinctrl_state *otp_state;
> };
>
> /**
> @@ -807,7 +810,7 @@ static void rk_tsadcv2_tshut_mode(int chn, void __iomem *regs,
> u32 val;
>
> val = readl_relaxed(regs + TSADCV2_INT_EN);
> - if (mode == TSHUT_MODE_GPIO) {
> + if (mode == TSHUT_MODE_OTP) {
> val &= ~TSADCV2_SHUT_2CRU_SRC_EN(chn);
> val |= TSADCV2_SHUT_2GPIO_SRC_EN(chn);
> } else {
> @@ -822,7 +825,7 @@ static void rk_tsadcv2_tshut_mode(int chn, void __iomem *regs,
> .chn_id[SENSOR_CPU] = 0, /* cpu sensor is channel 0 */
> .chn_num = 1, /* one channel for tsadc */
>
> - .tshut_mode = TSHUT_MODE_GPIO, /* default TSHUT via GPIO give PMIC */
> + .tshut_mode = TSHUT_MODE_OTP, /* default TSHUT via GPIO give PMIC */
> .tshut_polarity = TSHUT_LOW_ACTIVE, /* default TSHUT LOW ACTIVE */
> .tshut_temp = 95000,
>
> @@ -846,7 +849,7 @@ static void rk_tsadcv2_tshut_mode(int chn, void __iomem *regs,
> .chn_id[SENSOR_CPU] = 0, /* cpu sensor is channel 0 */
> .chn_num = 1, /* one channel for tsadc */
>
> - .tshut_mode = TSHUT_MODE_GPIO, /* default TSHUT via GPIO give PMIC */
> + .tshut_mode = TSHUT_MODE_OTP, /* default TSHUT via GPIO give PMIC */
> .tshut_polarity = TSHUT_LOW_ACTIVE, /* default TSHUT LOW ACTIVE */
> .tshut_temp = 95000,
>
> @@ -871,7 +874,7 @@ static void rk_tsadcv2_tshut_mode(int chn, void __iomem *regs,
> .chn_id[SENSOR_GPU] = 2, /* gpu sensor is channel 2 */
> .chn_num = 2, /* two channels for tsadc */
>
> - .tshut_mode = TSHUT_MODE_GPIO, /* default TSHUT via GPIO give PMIC */
> + .tshut_mode = TSHUT_MODE_OTP, /* default TSHUT via GPIO give PMIC */
> .tshut_polarity = TSHUT_LOW_ACTIVE, /* default TSHUT LOW ACTIVE */
> .tshut_temp = 95000,
>
> @@ -919,7 +922,7 @@ static void rk_tsadcv2_tshut_mode(int chn, void __iomem *regs,
> .chn_id[SENSOR_GPU] = 1, /* gpu sensor is channel 1 */
> .chn_num = 2, /* two channels for tsadc */
>
> - .tshut_mode = TSHUT_MODE_GPIO, /* default TSHUT via GPIO give PMIC */
> + .tshut_mode = TSHUT_MODE_OTP, /* default TSHUT via GPIO give PMIC */
> .tshut_polarity = TSHUT_LOW_ACTIVE, /* default TSHUT LOW ACTIVE */
> .tshut_temp = 95000,
>
> @@ -944,7 +947,7 @@ static void rk_tsadcv2_tshut_mode(int chn, void __iomem *regs,
> .chn_id[SENSOR_GPU] = 1, /* gpu sensor is channel 1 */
> .chn_num = 2, /* two channels for tsadc */
>
> - .tshut_mode = TSHUT_MODE_GPIO, /* default TSHUT via GPIO give PMIC */
> + .tshut_mode = TSHUT_MODE_OTP, /* default TSHUT via GPIO give PMIC */
> .tshut_polarity = TSHUT_LOW_ACTIVE, /* default TSHUT LOW ACTIVE */
> .tshut_temp = 95000,
>
> @@ -969,7 +972,7 @@ static void rk_tsadcv2_tshut_mode(int chn, void __iomem *regs,
> .chn_id[SENSOR_GPU] = 1, /* gpu sensor is channel 1 */
> .chn_num = 2, /* two channels for tsadc */
>
> - .tshut_mode = TSHUT_MODE_GPIO, /* default TSHUT via GPIO give PMIC */
> + .tshut_mode = TSHUT_MODE_OTP, /* default TSHUT via GPIO give PMIC */
> .tshut_polarity = TSHUT_LOW_ACTIVE, /* default TSHUT LOW ACTIVE */
> .tshut_temp = 95000,
>
> @@ -1080,6 +1083,20 @@ static int rockchip_thermal_get_temp(void *_sensor, int *out_temp)
> .set_trips = rockchip_thermal_set_trips,
> };
>
> +static void thermal_pinctrl_select_otp(struct rockchip_thermal_data *thermal)
> +{
> + if (!IS_ERR(thermal->pinctrl) && !IS_ERR_OR_NULL(thermal->otp_state))
> + pinctrl_select_state(thermal->pinctrl,
> + thermal->otp_state);
> +}
> +
> +static void thermal_pinctrl_select_gpio(struct rockchip_thermal_data *thermal)
> +{
> + if (!IS_ERR(thermal->pinctrl) && !IS_ERR_OR_NULL(thermal->gpio_state))
> + pinctrl_select_state(thermal->pinctrl,
> + thermal->gpio_state);
> +}

You should not have to create a couple of specific functions just to
check the pinctrl pointers are set. The caller should do that.

> static int rockchip_configure_from_dt(struct device *dev,
> struct device_node *np,
> struct rockchip_thermal_data *thermal)
> @@ -1103,7 +1120,7 @@ static int rockchip_configure_from_dt(struct device *dev,
> if (of_property_read_u32(np, "rockchip,hw-tshut-mode", &tshut_mode)) {
> dev_warn(dev,
> "Missing tshut mode property, using default (%s)\n",
> - thermal->chip->tshut_mode == TSHUT_MODE_GPIO ?
> + thermal->chip->tshut_mode == TSHUT_MODE_OTP ?
> "gpio" : "cru");
> thermal->tshut_mode = thermal->chip->tshut_mode;
> } else {
> @@ -1242,6 +1259,8 @@ static int rockchip_thermal_probe(struct platform_device *pdev)
> return error;
> }
>
> + thermal->chip->control(thermal->regs, false);
> +
> error = clk_prepare_enable(thermal->clk);
> if (error) {
> dev_err(&pdev->dev, "failed to enable converter clock: %d\n",
> @@ -1267,6 +1286,24 @@ static int rockchip_thermal_probe(struct platform_device *pdev)
> thermal->chip->initialize(thermal->grf, thermal->regs,
> thermal->tshut_polarity);
>
> + if (thermal->tshut_mode == TSHUT_MODE_OTP) {
> + thermal->pinctrl = devm_pinctrl_get(&pdev->dev);
> + if (IS_ERR(thermal->pinctrl))
> + dev_err(&pdev->dev, "failed to find thermal pinctrl\n");
> +
> + thermal->gpio_state = pinctrl_lookup_state(thermal->pinctrl,
> + "gpio");
> + if (IS_ERR_OR_NULL(thermal->gpio_state))
> + dev_err(&pdev->dev, "failed to find thermal gpio state\n");
> +
> + thermal->otp_state = pinctrl_lookup_state(thermal->pinctrl,
> + "otpout");
> + if (IS_ERR_OR_NULL(thermal->otp_state))
> + dev_err(&pdev->dev, "failed to find thermal otpout state\n");

What is the meaning for the rest of the code if the lookup fails for any
of those ?

> + thermal_pinctrl_select_otp(thermal);
> + }
> +
> for (i = 0; i < thermal->chip->chn_num; i++) {
> error = rockchip_thermal_register_sensor(pdev, thermal,
> &thermal->sensors[i],
> @@ -1338,7 +1375,8 @@ static int __maybe_unused rockchip_thermal_suspend(struct device *dev)
> clk_disable(thermal->pclk);
> clk_disable(thermal->clk);
>
> - pinctrl_pm_select_sleep_state(dev);
> + if (thermal->tshut_mode == TSHUT_MODE_OTP)
> + thermal_pinctrl_select_gpio(thermal);
>
> return 0;
> }
> @@ -1383,7 +1421,8 @@ static int __maybe_unused rockchip_thermal_resume(struct device *dev)
> for (i = 0; i < thermal->chip->chn_num; i++)
> rockchip_thermal_toggle_sensor(&thermal->sensors[i], true);
>
> - pinctrl_pm_select_default_state(dev);
> + if (thermal->tshut_mode == TSHUT_MODE_OTP)
> + thermal_pinctrl_select_otp(thermal);
>
> return 0;
> }
>


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