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SubjectRe: [PATCH v4 11/11] thermal: sun8i: add thermal driver for h3
Hello Yangtao,

On Sun, Jun 23, 2019 at 12:42:06PM -0400, Yangtao Li wrote:
> This patch adds the support for allwinner h3 thermal sensor.
>
> Signed-off-by: Yangtao Li <tiny.windzz@gmail.com>
> ---
> drivers/thermal/sun8i_thermal.c | 72 +++++++++++++++++++++++++++++++++
> 1 file changed, 72 insertions(+)
>
> diff --git a/drivers/thermal/sun8i_thermal.c b/drivers/thermal/sun8i_thermal.c
> index 260b24340f5b..c8ee291f3b17 100644
> --- a/drivers/thermal/sun8i_thermal.c
> +++ b/drivers/thermal/sun8i_thermal.c
> @@ -27,6 +27,14 @@
> #define TEMP_TO_REG 672
> #define CALIBRATE_DEFAULT 0x800
>
> +#define SUN8I_THS_CTRL0 0x00
> +#define SUN8I_THS_CTRL2 0x40
> +#define SUN8I_THS_IC 0x44
> +#define SUN8I_THS_IS 0x48
> +#define SUN8I_THS_MFC 0x70
> +#define SUN8I_THS_TEMP_CALIB 0x74
> +#define SUN8I_THS_TEMP_DATA 0x80
> +
> #define SUN50I_THS_CTRL0 0x00
> #define SUN50I_H6_THS_ENABLE 0x04
> #define SUN50I_H6_THS_PC 0x08
> @@ -36,6 +44,9 @@
> #define SUN50I_H6_THS_TEMP_CALIB 0xa0
> #define SUN50I_H6_THS_TEMP_DATA 0xc0
>
> +#define SUN8I_THS_CTRL0_T_ACQ0(x) (GENMASK(15, 0) & (x))
> +#define SUN8I_THS_CTRL2_T_ACQ1(x) ((GENMASK(15, 0) & (x)) << 16)
> +
> #define SUN50I_THS_CTRL0_T_ACQ(x) ((GENMASK(15, 0) & (x)) << 16)
> #define SUN50I_THS_FILTER_EN BIT(2)
> #define SUN50I_THS_FILTER_TYPE(x) (GENMASK(1, 0) & (x))
> @@ -121,6 +132,21 @@ static const struct regmap_config config = {
> .fast_io = true,
> };
>
> +static int sun8i_h3_irq_ack(struct ths_device *tmdev)
> +{
> + int state, ret = 0;
> +
> + regmap_read(tmdev->regmap, SUN8I_THS_IS, &state);
> +
> + if (state & BIT(8)) {
> + regmap_write(tmdev->regmap, SUN8I_THS_IS,
> + BIT(8));
> + ret |= BIT(1);
> + }
> +
> + return ret;
> +}
> +
> static int sun50i_h6_irq_ack(struct ths_device *tmdev)
> {
> int i, state, ret = 0;
> @@ -154,6 +180,14 @@ static irqreturn_t sun8i_irq_thread(int irq, void *data)
> return IRQ_HANDLED;
> }
>
> +static int sun8i_h3_ths_calibrate(struct ths_device *tmdev,
> + u16 *caldata, int callen)
> +{
> + regmap_write(tmdev->regmap, SUN8I_THS_TEMP_CALIB, *caldata);

You're missing a sanity check for callen here.

regards,
o.

> + return 0;
> +}
> +
> static int sun50i_h6_ths_calibrate(struct ths_device *tmdev,
> u16 *caldata, int callen)
> {
> @@ -325,6 +359,32 @@ static int sun8i_ths_resource_init(struct ths_device *tmdev)
> return ret;
> }
>
> +static int sun8i_h3_thermal_init(struct ths_device *tmdev)
> +{
> + /* average over 4 samples */
> + regmap_write(tmdev->regmap, SUN8I_THS_MFC,
> + SUN50I_THS_FILTER_EN |
> + SUN50I_THS_FILTER_TYPE(1));
> + /*
> + * period = (x + 1) * 4096 / clkin; ~10ms
> + * enable data interrupt
> + */
> + regmap_write(tmdev->regmap, SUN8I_THS_IC,
> + SUN50I_H6_THS_PC_TEMP_PERIOD(58) | BIT(8));
> + /*
> + * clkin = 24MHz
> + * T acquire = clkin / (x + 1)
> + * = 20us
> + * enable sensor
> + */
> + regmap_write(tmdev->regmap, SUN8I_THS_CTRL0,
> + SUN8I_THS_CTRL0_T_ACQ0(479));
> + regmap_write(tmdev->regmap, SUN8I_THS_CTRL2,
> + SUN8I_THS_CTRL2_T_ACQ1(479) | BIT(0));
> +
> + return 0;
> +}
> +
> static int sun50i_thermal_init(struct ths_device *tmdev)
> {
> int val;
> @@ -431,6 +491,17 @@ static int sun8i_ths_remove(struct platform_device *pdev)
> return 0;
> }
>
> +static const struct ths_thermal_chip sun8i_h3_ths = {
> + .sensor_num = 1,
> + .offset = -1794,
> + .scale = -121,
> + .has_ahb_clk = true,
> + .temp_data_base = SUN8I_THS_TEMP_DATA,
> + .calibrate = sun8i_h3_ths_calibrate,
> + .init = sun8i_h3_thermal_init,
> + .irq_ack = sun8i_h3_irq_ack,
> +};
> +
> static const struct ths_thermal_chip sun50i_h6_ths = {
> .sensor_num = 2,
> .offset = -2794,
> @@ -443,6 +514,7 @@ static const struct ths_thermal_chip sun50i_h6_ths = {
> };
>
> static const struct of_device_id of_ths_match[] = {
> + { .compatible = "allwinner,sun8i-h3-ths", .data = &sun8i_h3_ths },
> { .compatible = "allwinner,sun50i-h6-ths", .data = &sun50i_h6_ths },
> { /* sentinel */ },
> };
> --
> 2.17.1
>
>
> _______________________________________________
> linux-arm-kernel mailing list
> linux-arm-kernel@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

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