linux-kernel - Re: [PATCH v4 2/7] drivers: thermal: tsens: try load regmap from parent for 8960

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Date:   Mon, 20 Jul 2020 15:20:10 +0530
From:   Amit Kucheria <amit.kucheria@...aro.org>
To:     Ansuel Smith <ansuelsmth@...il.com>
Cc:     Rob Herring <robh+dt@...nel.org>, Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Zhang Rui <rui.zhang@...el.com>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Linux PM list <linux-pm@...r.kernel.org>,
        linux-arm-msm <linux-arm-msm@...r.kernel.org>,
        DTML <devicetree@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-clk <linux-clk@...r.kernel.org>
Subject: Re: [PATCH v4 2/7] drivers: thermal: tsens: try load regmap from
 parent for 8960

On Thu, Jul 16, 2020 at 7:58 AM Ansuel Smith <ansuelsmth@...il.com> wrote:
>
> Devices based on 8060 tsens driver (ipq8064) use the reg of the gcc

typo: 8960

> driver. Try to load the regmap of the parent as they share the same
> regs.
>
> Signed-off-by: Ansuel Smith <ansuelsmth@...il.com>
> ---
>  drivers/thermal/qcom/tsens-8960.c | 12 +++++++++++-
>  1 file changed, 11 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/thermal/qcom/tsens-8960.c b/drivers/thermal/qcom/tsens-8960.c
> index 2a28a5af209e..45788eb3c666 100644
> --- a/drivers/thermal/qcom/tsens-8960.c
> +++ b/drivers/thermal/qcom/tsens-8960.c
> @@ -7,6 +7,7 @@
>  #include <linux/delay.h>
>  #include <linux/bitops.h>
>  #include <linux/regmap.h>
> +#include <linux/mfd/syscon.h>
>  #include <linux/thermal.h>
>  #include "tsens.h"
>
> @@ -168,8 +169,17 @@ static int init_8960(struct tsens_priv *priv)
>         u32 reg_cntl;
>
>         priv->tm_map = dev_get_regmap(priv->dev, NULL);
> -       if (!priv->tm_map)
> +       if (!priv->tm_map) {
> +               struct device *parent = priv->dev->parent;
> +
> +               if (parent)
> +                       priv->tm_map = syscon_node_to_regmap(parent->of_node);
> +       }
> +
> +       if (!priv->tm_map || IS_ERR(priv->tm_map)) {
> +               dev_err(priv->dev, "failed to get tsens regmap\n");
>                 return -ENODEV;
> +       }
>
>         /*
>          * The status registers for each sensor are discontiguous
> --
> 2.27.0
>