[v3,6/6] thermal: qcom: tsens-v0_1: Add MSM8909 data

The MSM8909 SoC has 5 thermal sensors in a TSENS v0.1 block. Like
MDM9607 it uses a non-standard default slope value of 3000 [1] and needs
per-sensor "correction factors" to workaround issues with the factory
calibration [2].

[1]: https://git.codelinaro.org/clo/la/kernel/msm-3.18/-/blob/LA.UM.7.7.c26-09100-8x09.0/arch/arm/boot/dts/qcom/msm8909.dtsi#L476
[2]: https://git.codelinaro.org/clo/la/kernel/msm-3.18/-/commit/6df022c6d0c2c1b4a5a6c2124dba4d57910c0911

Signed-off-by: Stephan Gerhold <stephan.gerhold@kernkonzept.com>
---
Changes in v3: None
Changes in v2:
  - Rewrite on top of per-sensor nvmem cell changes that landed in 6.3
---
 drivers/thermal/qcom/tsens-v0_1.c | 32 ++++++++++++++++++++++++++++++-
 drivers/thermal/qcom/tsens.c      |  3 +++
 drivers/thermal/qcom/tsens.h      |  2 +-
 3 files changed, 35 insertions(+), 2 deletions(-)

On 15.03.2023 11:39, Stephan Gerhold wrote:
> The MSM8909 SoC has 5 thermal sensors in a TSENS v0.1 block. Like
> MDM9607 it uses a non-standard default slope value of 3000 [1] and needs
> per-sensor "correction factors" to workaround issues with the factory
> calibration [2].
> 
> [1]: https://git.codelinaro.org/clo/la/kernel/msm-3.18/-/blob/LA.UM.7.7.c26-09100-8x09.0/arch/arm/boot/dts/qcom/msm8909.dtsi#L476
> [2]: https://git.codelinaro.org/clo/la/kernel/msm-3.18/-/commit/6df022c6d0c2c1b4a5a6c2124dba4d57910c0911
> 
> Signed-off-by: Stephan Gerhold <stephan.gerhold@kernkonzept.com>
> ---
> Changes in v3: None
> Changes in v2:
>   - Rewrite on top of per-sensor nvmem cell changes that landed in 6.3
> ---
>  drivers/thermal/qcom/tsens-v0_1.c | 32 ++++++++++++++++++++++++++++++-
>  drivers/thermal/qcom/tsens.c      |  3 +++
>  drivers/thermal/qcom/tsens.h      |  2 +-
>  3 files changed, 35 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/thermal/qcom/tsens-v0_1.c b/drivers/thermal/qcom/tsens-v0_1.c
> index e69889dd524a..2fda1ff4f6a6 100644
> --- a/drivers/thermal/qcom/tsens-v0_1.c
> +++ b/drivers/thermal/qcom/tsens-v0_1.c
> @@ -207,6 +207,23 @@ static int calibrate_8974(struct tsens_priv *priv)
>  	return 0;
>  }
>  
> +static int __init init_8909(struct tsens_priv *priv)
> +{
> +	int i;
> +
> +	for (i = 0; i < priv->num_sensors; ++i)
> +		priv->sensor[i].slope = 3000;
> +
I think assigning 0 here explicitly to priv->sensor[0].p12_calib_offset,
while unnecessary, would make it a bit more obvious.

Either way:

Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>

Konrad
> +	priv->sensor[1].p1_calib_offset = -10;
> +	priv->sensor[1].p2_calib_offset = -6;
> +	priv->sensor[3].p1_calib_offset = -9;
> +	priv->sensor[3].p2_calib_offset = -9;
> +	priv->sensor[4].p1_calib_offset = -8;
> +	priv->sensor[4].p2_calib_offset = -10;
> +
> +	return init_common(priv);
> +}
> +
>  static int __init init_8939(struct tsens_priv *priv) {
>  	priv->sensor[0].slope = 2911;
>  	priv->sensor[1].slope = 2789;
> @@ -243,7 +260,7 @@ static int __init init_9607(struct tsens_priv *priv)
>  	return init_common(priv);
>  }
>  
> -/* v0.1: 8916, 8939, 8974, 9607 */
> +/* v0.1: 8909, 8916, 8939, 8974, 9607 */
>  
>  static struct tsens_features tsens_v0_1_feat = {
>  	.ver_major	= VER_0_1,
> @@ -292,6 +309,19 @@ static const struct reg_field tsens_v0_1_regfields[MAX_REGFIELDS] = {
>  	[TRDY] = REG_FIELD(TM_TRDY_OFF, 0, 0),
>  };
>  
> +static const struct tsens_ops ops_8909 = {
> +	.init		= init_8909,
> +	.calibrate	= tsens_calibrate_common,
> +	.get_temp	= get_temp_common,
> +};
> +
> +struct tsens_plat_data data_8909 = {
> +	.num_sensors	= 5,
> +	.ops		= &ops_8909,
> +	.feat		= &tsens_v0_1_feat,
> +	.fields	= tsens_v0_1_regfields,
> +};
> +
>  static const struct tsens_ops ops_8916 = {
>  	.init		= init_common,
>  	.calibrate	= calibrate_8916,
> diff --git a/drivers/thermal/qcom/tsens.c b/drivers/thermal/qcom/tsens.c
> index 32d2907f76e5..a04179247b34 100644
> --- a/drivers/thermal/qcom/tsens.c
> +++ b/drivers/thermal/qcom/tsens.c
> @@ -1109,6 +1109,9 @@ static const struct of_device_id tsens_table[] = {
>  	}, {
>  		.compatible = "qcom,mdm9607-tsens",
>  		.data = &data_9607,
> +	}, {
> +		.compatible = "qcom,msm8909-tsens",
> +		.data = &data_8909,
>  	}, {
>  		.compatible = "qcom,msm8916-tsens",
>  		.data = &data_8916,
> diff --git a/drivers/thermal/qcom/tsens.h b/drivers/thermal/qcom/tsens.h
> index 880be6be5c3f..c88287dede96 100644
> --- a/drivers/thermal/qcom/tsens.h
> +++ b/drivers/thermal/qcom/tsens.h
> @@ -639,7 +639,7 @@ 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, data_9607;
> +extern struct tsens_plat_data data_8909, data_8916, data_8939, data_8974, data_9607;
>  
>  /* TSENS v1 targets */
>  extern struct tsens_plat_data data_tsens_v1, data_8976, data_8956;