linux-kernel - Re: [PATCH v1 06/10] thermal: tsens: Add the SROT address map

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Message-ID: <20180809194602.GN160295@google.com>
Date:   Thu, 9 Aug 2018 12:46:02 -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,
        Zhang Rui <rui.zhang@...el.com>, linux-pm@...r.kernel.org
Subject: Re: [PATCH v1 06/10] thermal: tsens: Add the SROT address map

On Thu, Aug 09, 2018 at 06:02:38PM +0530, Amit Kucheria wrote:
> On platforms whose device trees specify two address spaces for TSENS, the
> second one points to the SROT registers. Initialise the SROT map on those
> platforms.
> 
> Signed-off-by: Amit Kucheria <amit.kucheria@...aro.org>
> ---
>  drivers/thermal/qcom/tsens-common.c | 14 ++++++++++++--
>  drivers/thermal/qcom/tsens.h        |  1 +
>  2 files changed, 13 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/thermal/qcom/tsens-common.c b/drivers/thermal/qcom/tsens-common.c
> index 0585084630b3..0b8a793f15f4 100644
> --- a/drivers/thermal/qcom/tsens-common.c
> +++ b/drivers/thermal/qcom/tsens-common.c
> @@ -117,16 +117,26 @@ static const struct regmap_config tsens_config = {
>  
>  int __init init_common(struct tsens_device *tmdev)
>  {
> -	void __iomem *tm_base;
> +	void __iomem *tm_base, *srot_base;
>  	struct resource *res;
>  	struct platform_device *op = of_find_device_by_node(tmdev->dev->of_node);
>  
>  	if (!op)
>  		return -EINVAL;
>  
> -	/* The driver only uses the TM register address space for now */
>  	if (op->num_resources > 1) {
> +		/* DT with separate SROT and TM address space */
>  		tmdev->tm_offset = 0;
> +		res = platform_get_resource(op, IORESOURCE_MEM, 1);
> +		srot_base = devm_ioremap_resource(&op->dev, res);
> +		if (IS_ERR(srot_base))
> +			return PTR_ERR(srot_base);
> +
> +		tmdev->srot_map = devm_regmap_init_mmio(tmdev->dev,
> +							srot_base, &tsens_config);
> +		if (IS_ERR(tmdev->srot_map))
> +			return PTR_ERR(tmdev->srot_map);
> +
>  	} else {
>  		/* old DTs where SROT and TM were in a contiguous 2K block */
>  		tmdev->tm_offset = 0x1000;
> diff --git a/drivers/thermal/qcom/tsens.h b/drivers/thermal/qcom/tsens.h
> index 58e98c4d3a8b..b9c4bcf255fa 100644
> --- a/drivers/thermal/qcom/tsens.h
> +++ b/drivers/thermal/qcom/tsens.h
> @@ -70,6 +70,7 @@ struct tsens_device {
>  	struct device			*dev;
>  	u32				num_sensors;
>  	struct regmap			*tm_map;
> +	struct regmap			*srot_map;
>  	u32				tm_offset;
>  	struct tsens_context		ctx;
>  	const struct tsens_ops		*ops;

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