On 06/02/2018 04:41 PM, Amit Kucheria wrote:
> There are two tsens blocks on the SDM845. These will be configured through
> the devicetree.
>
> Signed-off-by: Amit Kucheria <amit.kucheria@xxxxxxxxxx>
> ---
> .../devicetree/bindings/thermal/qcom-tsens.txt | 1 +
> drivers/thermal/qcom/Makefile | 2 +-
> drivers/thermal/qcom/tsens-sdm845.c | 98 ++++++++++++++++++++++
> drivers/thermal/qcom/tsens.c | 3 +
> drivers/thermal/qcom/tsens.h | 1 +
> 5 files changed, 104 insertions(+), 1 deletion(-)
> create mode 100644 drivers/thermal/qcom/tsens-sdm845.c
>
> diff --git a/Documentation/devicetree/bindings/thermal/qcom-tsens.txt b/Documentation/devicetree/bindings/thermal/qcom-tsens.txt
> index 292ed89..8652499 100644
> --- a/Documentation/devicetree/bindings/thermal/qcom-tsens.txt
> +++ b/Documentation/devicetree/bindings/thermal/qcom-tsens.txt
> @@ -5,6 +5,7 @@ Required properties:
> - "qcom,msm8916-tsens" : For 8916 Family of SoCs
> - "qcom,msm8974-tsens" : For 8974 Family of SoCs
> - "qcom,msm8996-tsens" : For 8996 Family of SoCs
> + - "qcom,sdm845-tsens" : For SDM845 Family of SoCs
>
> - reg: Address range of the thermal registers
> - #thermal-sensor-cells : Should be 1. See ./thermal.txt for a description.
> diff --git a/drivers/thermal/qcom/Makefile b/drivers/thermal/qcom/Makefile
> index 2cc2193..dc9f169 100644
> --- a/drivers/thermal/qcom/Makefile
> +++ b/drivers/thermal/qcom/Makefile
> @@ -1,2 +1,2 @@
> obj-$(CONFIG_QCOM_TSENS) += qcom_tsens.o
> -qcom_tsens-y += tsens.o tsens-common.o tsens-8916.o tsens-8974.o tsens-8960.o tsens-8996.o
> +qcom_tsens-y += tsens.o tsens-common.o tsens-8916.o tsens-8974.o tsens-8960.o tsens-8996.o tsens-sdm845.o
> diff --git a/drivers/thermal/qcom/tsens-sdm845.c b/drivers/thermal/qcom/tsens-sdm845.c
> new file mode 100644
> index 0000000..5d78f0b
> --- /dev/null
> +++ b/drivers/thermal/qcom/tsens-sdm845.c
> @@ -0,0 +1,98 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Copyright (c) 2018, Linaro Limited
> + */
> +
> +#include <linux/of_address.h>
> +#include <linux/platform_device.h>
> +#include <linux/regmap.h>
> +#include "tsens.h"
> +
> +#define CNTL_OFFSET 4
> +/* CNTL_OFFSET bitmasks */
> +#define EN BIT(0)
> +#define SW_RST BIT(1)
> +
> +#define SENSOR0_SHIFT 3
> +
> +#define TRDY_OFFSET 0xe4
> +#define TRDY_READY_BIT BIT(1)
> +
> +#define STATUS_OFFSET 0xa0
> +#define LAST_TEMP_MASK 0xfff
> +#define STATUS_VALID_BIT BIT(21)
> +#define CODE_SIGN_BIT BIT(11)
> +
> +static int get_temp_sdm845(struct tsens_device *tmdev, int id, int *temp)
> +{
> + struct tsens_sensor *s = &tmdev->sensor[id];
> + u32 code;
> + unsigned int sensor_addr;
> + int last_temp = 0, last_temp2 = 0, last_temp3 = 0, ret;
> +
> + ret = regmap_read(tmdev->map, TRDY_OFFSET, &code);
> + if (ret)
> + return ret;
> + if (code & TRDY_READY_BIT)
> + return -ENODATA;
> +
> + sensor_addr = STATUS_OFFSET + s->hw_id * 4;
> + ret = regmap_read(tmdev->map, sensor_addr, &code);
> + if (ret)
> + return ret;
> + last_temp = code & LAST_TEMP_MASK;
> + if (code & STATUS_VALID_BIT)
> + goto done;
> +
> + /* Try a second time */
> + ret = regmap_read(tmdev->map, sensor_addr, &code);
> + if (ret)
> + return ret;
> + if (code & STATUS_VALID_BIT) {
> + last_temp = code & LAST_TEMP_MASK;
> + goto done;
> + } else {
> + last_temp2 = code & LAST_TEMP_MASK;
> + }
> +
> + /* Try a third/last time */
> + ret = regmap_read(tmdev->map, sensor_addr, &code);
> + if (ret)
> + return ret;
> + if (code & STATUS_VALID_BIT) {
> + last_temp = code & LAST_TEMP_MASK;
> + goto done;
> + } else {
> + last_temp3 = code & LAST_TEMP_MASK;
> + }
> +
> + if (last_temp == last_temp2)
> + last_temp = last_temp2;
> + else if (last_temp2 == last_temp3)
> + last_temp = last_temp3;
> +done:
> + /* Code sign bit is the sign extension for a negative value */
> + if (last_temp & CODE_SIGN_BIT)
> + last_temp |= ~CODE_SIGN_BIT;
> +
> + /* Temperatures are in deciCelicius */
> + *temp = last_temp * 100;
This looks the same as what we do for 8996. Does it make sense to move this
to tsens-common and reuse in both 8996 and 845?
> +
> + return 0;
> +}
> +
> +static const struct regmap_config tsens_config = {
> + .reg_bits = 32,
> + .val_bits = 32,
> + .reg_stride = 4,
> +};
> +
> +
> +static const struct tsens_ops ops_sdm845 = {
> + .init = init_common,
> + .get_temp = get_temp_sdm845,
> +};
> +
> +const struct tsens_data data_sdm845 = {
> + .ops = &ops_sdm845,
> +};
> diff --git a/drivers/thermal/qcom/tsens.c b/drivers/thermal/qcom/tsens.c
> index 3f9fe6a..314a20f 100644
> --- a/drivers/thermal/qcom/tsens.c
> +++ b/drivers/thermal/qcom/tsens.c
> @@ -72,6 +72,9 @@ static const struct of_device_id tsens_table[] = {
> }, {
> .compatible = "qcom,msm8996-tsens",
> .data = &data_8996,
> + }, {
> + .compatible = "qcom,sdm845-tsens",
> + .data = &data_sdm845,
> },
> {}
> };
> diff --git a/drivers/thermal/qcom/tsens.h b/drivers/thermal/qcom/tsens.h
> index 911c197..f15660d 100644
> --- a/drivers/thermal/qcom/tsens.h
> +++ b/drivers/thermal/qcom/tsens.h
> @@ -90,5 +90,6 @@ int init_common(struct tsens_device *);
> int get_temp_common(struct tsens_device *, int, int *);
>
> extern const struct tsens_data data_8916, data_8974, data_8960, data_8996;
> +extern const struct tsens_data data_sdm845;
>
> #endif /* __QCOM_TSENS_H__ */
>
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