linux-kernel - Re: [PATCH v1 01/10] arm/arm64: dts: msm8974/msm8916: thermal: Split address space into two

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Message-ID: <20180809191059.GI160295@google.com>
Date:   Thu, 9 Aug 2018 12:10:59 -0700
From:   Matthias Kaehlcke <mka@...omium.org>
To:     Amit Kucheria <amit.kucheria@...aro.org>
Cc:     linux-kernel@...r.kernel.org, rnayak@...eaurora.org,
        linux-arm-msm@...r.kernel.org, bjorn.andersson@...aro.org,
        edubezval@...il.com, smohanad@...eaurora.org,
        andy.gross@...aro.org, dianders@...omium.org,
        David Brown <david.brown@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>,
        Zhang Rui <rui.zhang@...el.com>, linux-soc@...r.kernel.org,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-pm@...r.kernel.org
Subject: Re: [PATCH v1 01/10] arm/arm64: dts: msm8974/msm8916: thermal: Split
 address space into two

On Thu, Aug 09, 2018 at 06:02:33PM +0530, Amit Kucheria wrote:
> We've earlier added support to split the register address space into TM
> and SROT regions.
> 
> Split up the regmap address space into two for the remaining platforms that
> have a similar register layout and make corresponding changes to the
> get_temp_common() function used by these platforms.
> 
> Since tsens-common.c/init_common() currently only registers one address
> space, the order is important (TM before SROT).  This is OK since the code
> doesn't really use the SROT functionality yet.
> 
> Signed-off-by: Amit Kucheria <amit.kucheria@...aro.org>
> ---
>  arch/arm/boot/dts/qcom-msm8974.dtsi   | 6 ++++--
>  arch/arm64/boot/dts/qcom/msm8916.dtsi | 6 ++++--
>  drivers/thermal/qcom/tsens-common.c   | 5 +++--
>  3 files changed, 11 insertions(+), 6 deletions(-)
> 
> diff --git a/arch/arm/boot/dts/qcom-msm8974.dtsi b/arch/arm/boot/dts/qcom-msm8974.dtsi
> index d9019a49b292..3c4b81c29798 100644
> --- a/arch/arm/boot/dts/qcom-msm8974.dtsi
> +++ b/arch/arm/boot/dts/qcom-msm8974.dtsi
> @@ -427,11 +427,13 @@
>  			};
>  		};
>  
> -		tsens: thermal-sensor@...a8000 {
> +		tsens: thermal-sensor@...a9000 {
>  			compatible = "qcom,msm8974-tsens";
> -			reg = <0xfc4a8000 0x2000>;
> +			reg = <0xfc4a9000 0x1000>, /* TM */
> +			      <0xfc4a8000 0x1000>; /* SROT */
>  			nvmem-cells = <&tsens_calib>, <&tsens_backup>;
>  			nvmem-cell-names = "calib", "calib_backup";
> +			#qcom,sensors = <11>;

nit: adding the number of sensors isn't directly related and probably
should be in a separate patch. Not important enough to re-spin just
for this though ;-)

>  			#thermal-sensor-cells = <1>;
>  		};
>  
> diff --git a/arch/arm64/boot/dts/qcom/msm8916.dtsi b/arch/arm64/boot/dts/qcom/msm8916.dtsi
> index cc1040eacdf5..abf84df5a7bc 100644
> --- a/arch/arm64/boot/dts/qcom/msm8916.dtsi
> +++ b/arch/arm64/boot/dts/qcom/msm8916.dtsi
> @@ -774,11 +774,13 @@
>  			};
>  		};
>  
> -		tsens: thermal-sensor@...000 {
> +		tsens: thermal-sensor@...000 {
>  			compatible = "qcom,msm8916-tsens";
> -			reg = <0x4a8000 0x2000>;
> +			reg = <0x4a9000 0x1000>, /* TM */
> +			      <0x4a8000 0x1000>; /* SROT */
>  			nvmem-cells = <&tsens_caldata>, <&tsens_calsel>;
>  			nvmem-cell-names = "calib", "calib_sel";
> +			#qcom,sensors = <5>;

ditto

>  			#thermal-sensor-cells = <1>;
>  		};
>  
> diff --git a/drivers/thermal/qcom/tsens-common.c b/drivers/thermal/qcom/tsens-common.c
> index 6207d8d92351..478739543bbc 100644
> --- a/drivers/thermal/qcom/tsens-common.c
> +++ b/drivers/thermal/qcom/tsens-common.c
> @@ -21,7 +21,7 @@
>  #include <linux/regmap.h>
>  #include "tsens.h"
>  
> -#define S0_ST_ADDR		0x1030
> +#define STATUS_OFFSET		0x30
>  #define SN_ADDR_OFFSET		0x4
>  #define SN_ST_TEMP_MASK		0x3ff
>  #define CAL_DEGC_PT1		30
> @@ -107,8 +107,9 @@ int get_temp_common(struct tsens_device *tmdev, int id, int *temp)
>  	unsigned int status_reg;
>  	int last_temp = 0, ret;
>  
> -	status_reg = S0_ST_ADDR + s->hw_id * SN_ADDR_OFFSET;
> +	status_reg = tmdev->tm_offset + STATUS_OFFSET + s->hw_id * SN_ADDR_OFFSET;
>  	ret = regmap_read(tmdev->map, status_reg, &code);
> +
>  	if (ret)
>  		return ret;
>  	last_temp = code & SN_ST_TEMP_MASK;

Reviewed-by: Matthias Kaehlcke <mka@...omium.org>