Re: [PATCH] thermal: qcom: tsens-v0_1: Add support for MDM9607

From: Bjorn Andersson
Date: Wed Jan 27 2021 - 13:32:40 EST

On Wed 27 Jan 12:14 CST 2021, Konrad Dybcio wrote:

> MDM9607 TSENS IP is very similar to the one of MSM8916, with
> minor adjustments to various tuning values.
>
> Signed-off-by: Konrad Dybcio <konrad.dybcio@xxxxxxxxxxxxxx>
> ---
> .../bindings/thermal/qcom-tsens.yaml | 2 +
> drivers/thermal/qcom/tsens-v0_1.c | 100 +++++++++++++++++-
> drivers/thermal/qcom/tsens.c | 3 +
> drivers/thermal/qcom/tsens.h | 2 +-
> 4 files changed, 105 insertions(+), 2 deletions(-)
>
> diff --git a/Documentation/devicetree/bindings/thermal/qcom-tsens.yaml b/Documentation/devicetree/bindings/thermal/qcom-tsens.yaml
> index 95462e071ab4..8ad9dc139c23 100644
> --- a/Documentation/devicetree/bindings/thermal/qcom-tsens.yaml
> +++ b/Documentation/devicetree/bindings/thermal/qcom-tsens.yaml
> @@ -22,6 +22,7 @@ properties:
> - description: v0.1 of TSENS
> items:
> - enum:
> + - qcom,mdm9607-tsens
> - qcom,msm8916-tsens
> - qcom,msm8939-tsens
> - qcom,msm8974-tsens
> @@ -94,6 +95,7 @@ allOf:
> compatible:
> contains:
> enum:
> + - qcom,mdm9607-tsens
> - qcom,msm8916-tsens
> - qcom,msm8974-tsens
> - qcom,msm8976-tsens
> diff --git a/drivers/thermal/qcom/tsens-v0_1.c b/drivers/thermal/qcom/tsens-v0_1.c
> index 4ffa2e2c0145..8efe925b860f 100644
> --- a/drivers/thermal/qcom/tsens-v0_1.c
> +++ b/drivers/thermal/qcom/tsens-v0_1.c
> @@ -126,6 +126,39 @@
> #define CAL_SEL_SHIFT 30
> #define CAL_SEL_SHIFT_2 28
>
> +/* eeprom layout data for mdm9607 */
> +#define MDM9607_BASE0_MASK 0x000000ff
> +#define MDM9607_BASE1_MASK 0x000ff000
> +#define MDM9607_BASE0_SHIFT 0
> +#define MDM9607_BASE1_SHIFT 12
> +
> +#define MDM9607_S0_P1_MASK 0x00003f00
> +#define MDM9607_S1_P1_MASK 0x03f00000
> +#define MDM9607_S2_P1_MASK 0x0000003f
> +#define MDM9607_S3_P1_MASK 0x0003f000
> +#define MDM9607_S4_P1_MASK 0x0000003f
> +
> +#define MDM9607_S0_P2_MASK 0x000fc000
> +#define MDM9607_S1_P2_MASK 0xfc000000
> +#define MDM9607_S2_P2_MASK 0x00000fc0
> +#define MDM9607_S3_P2_MASK 0x00fc0000
> +#define MDM9607_S4_P2_MASK 0x00000fc0
> +
> +#define MDM9607_S0_P1_SHIFT 8
> +#define MDM9607_S1_P1_SHIFT 20
> +#define MDM9607_S2_P1_SHIFT 0
> +#define MDM9607_S3_P1_SHIFT 12
> +#define MDM9607_S4_P1_SHIFT 0
> +
> +#define MDM9607_S0_P2_SHIFT 14
> +#define MDM9607_S1_P2_SHIFT 26
> +#define MDM9607_S2_P2_SHIFT 6
> +#define MDM9607_S3_P2_SHIFT 18
> +#define MDM9607_S4_P2_SHIFT 6
> +
> +#define MDM9607_CAL_SEL_MASK 0x00700000
> +#define MDM9607_CAL_SEL_SHIFT 20
> +
> #define S0_P1_SHIFT 8
> #define S1_P1_SHIFT 14
> #define S2_P1_SHIFT 20
> @@ -452,7 +485,57 @@ static int calibrate_8974(struct tsens_priv *priv)
> return 0;
> }
>
> -/* v0.1: 8916, 8939, 8974 */
> +static int calibrate_9607(struct tsens_priv *priv)
> +{
> + int base0 = 0, base1 = 0, i;

Afaict, there's no need to initialize base0 and base1, they are both
assigned to before used.

Also, they are temporary variables within each case (even with the
fallthrough), so you should only need a single "base".

> + u32 p1[5], p2[5];
> + int mode = 0;
> + u32 *qfprom_cdata, *qfprom_csel;
> +
> + qfprom_cdata = (u32 *)qfprom_read(priv->dev, "calib");
> + if (IS_ERR(qfprom_cdata))
> + return PTR_ERR(qfprom_cdata);
> +
> + mode = (qfprom_cdata[2] & MDM9607_CAL_SEL_MASK) >> MDM9607_CAL_SEL_SHIFT;

How about:

mode = field_get(MDM9607_CAL_SEL_MASK, qfprom_cdata[2]);

and same below.

(I see that this would break the style of the file, perhaps we can clean
that up?)

> + dev_dbg(priv->dev, "calibration mode is %d\n", mode);
> +
> + switch (mode) {
> + case TWO_PT_CALIB:
> + base1 = (qfprom_cdata[2] & MDM9607_BASE1_MASK) >> MDM9607_BASE1_SHIFT;
> + p2[0] = (qfprom_cdata[0] & MDM9607_S0_P2_MASK) >> MDM9607_S0_P2_SHIFT;
> + p2[1] = (qfprom_cdata[0] & MDM9607_S1_P2_MASK) >> MDM9607_S1_P2_SHIFT;
> + p2[2] = (qfprom_cdata[1] & MDM9607_S2_P2_MASK) >> MDM9607_S2_P2_SHIFT;
> + p2[3] = (qfprom_cdata[1] & MDM9607_S3_P2_MASK) >> MDM9607_S3_P2_SHIFT;
> + p2[4] = (qfprom_cdata[2] & MDM9607_S4_P2_MASK) >> MDM9607_S4_P2_SHIFT;
> + for (i = 0; i < priv->num_sensors; i++)
> + p2[i] = ((base1 + p2[i]) << 2);
> + fallthrough;
> + case ONE_PT_CALIB2:
> + base0 = (qfprom_cdata[0] & MDM9607_BASE0_MASK);
> + p1[0] = (qfprom_cdata[0] & MDM9607_S0_P1_MASK) >> MDM9607_S0_P1_SHIFT;
> + p1[1] = (qfprom_cdata[0] & MDM9607_S1_P1_MASK) >> MDM9607_S1_P1_SHIFT;
> + p1[2] = (qfprom_cdata[1] & MDM9607_S2_P1_MASK) >> MDM9607_S2_P1_SHIFT;
> + p1[3] = (qfprom_cdata[1] & MDM9607_S3_P1_MASK) >> MDM9607_S3_P1_SHIFT;
> + p1[4] = (qfprom_cdata[2] & MDM9607_S4_P1_MASK) >> MDM9607_S4_P1_SHIFT;
> + for (i = 0; i < priv->num_sensors; i++)
> + p1[i] = (((base0) + p1[i]) << 2);
> + break;
> + default:
> + for (i = 0; i < priv->num_sensors; i++) {
> + p1[i] = 500;
> + p2[i] = 780;
> + }
> + break;
> + }
> +
> + compute_intercept_slope(priv, p1, p2, mode);
> + kfree(qfprom_cdata);
> + kfree(qfprom_csel);

qfprom_csel seems unused and uninitialized.

Regards,
Bjorn

> +
> + return 0;
> +}
> +
> +/* v0.1: 8916, 8939, 8974, 9607 */
>
> static struct tsens_features tsens_v0_1_feat = {
> .ver_major = VER_0_1,
> @@ -540,3 +623,18 @@ struct tsens_plat_data data_8974 = {
> .feat = &tsens_v0_1_feat,
> .fields = tsens_v0_1_regfields,
> };
> +
> +static const struct tsens_ops ops_9607 = {
> + .init = init_common,
> + .calibrate = calibrate_9607,
> + .get_temp = get_temp_common,
> +};
> +
> +struct tsens_plat_data data_9607 = {
> + .num_sensors = 5,
> + .ops = &ops_9607,
> + .hw_ids = (unsigned int []){ 0, 1, 2, 3, 4 },
> +
> + .feat = &tsens_v0_1_feat,
> + .fields = tsens_v0_1_regfields,
> +};
> diff --git a/drivers/thermal/qcom/tsens.c b/drivers/thermal/qcom/tsens.c
> index d8ce3a687b80..51c36b9e8e69 100644
> --- a/drivers/thermal/qcom/tsens.c
> +++ b/drivers/thermal/qcom/tsens.c
> @@ -895,6 +895,9 @@ static SIMPLE_DEV_PM_OPS(tsens_pm_ops, tsens_suspend, tsens_resume);
>
> static const struct of_device_id tsens_table[] = {
> {
> + .compatible = "qcom,mdm9607-tsens",
> + .data = &data_9607,
> + }, {
> .compatible = "qcom,msm8916-tsens",
> .data = &data_8916,
> }, {
> diff --git a/drivers/thermal/qcom/tsens.h b/drivers/thermal/qcom/tsens.h
> index f40b625f897e..cba64c33b4f9 100644
> --- a/drivers/thermal/qcom/tsens.h
> +++ b/drivers/thermal/qcom/tsens.h
> @@ -585,7 +585,7 @@ int get_temp_common(const struct tsens_sensor *s, int *temp);
> extern struct tsens_plat_data data_8960;
>
> /* TSENS v0.1 targets */
> -extern struct tsens_plat_data data_8916, data_8939, data_8974;
> +extern struct tsens_plat_data data_8916, data_8939, data_8974, data_9607;
>
> /* TSENS v1 targets */
> extern struct tsens_plat_data data_tsens_v1, data_8976;
> --
> 2.30.0
>