Message-ID: <eb3b9439-172b-daea-8f0f-53c8fe7648f9@linaro.org>
Date:   Fri, 27 Jan 2023 22:48:17 +0100
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Subject: Re: [PATCH v9 2/5] thermal: mediatek: control buffer enablement
 tweaks
Content-Language: en-US
To:     Amjad Ouled-Ameur <aouledameur@baylibre.com>,
        "Rafael J. Wysocki" <rafael@kernel.org>,
        Amit Kucheria <amitk@kernel.org>,
        Zhang Rui <rui.zhang@intel.com>,
        Rob Herring <robh+dt@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>
Cc:     linux-pm@vger.kernel.org, devicetree@vger.kernel.org,
        linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
        linux-mediatek@lists.infradead.org,
        Fabien Parent <fparent@baylibre.com>,
        Matthias Brugger <matthias.bgg@gmail.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@collabora.com>,
        Rob Herring <robh@kernel.org>,
        Markus Schneider-Pargmann <msp@baylibre.com>,
        Hsin-Yi Wang <hsinyi@chromium.org>,
        Michael Kao <michael.kao@mediatek.com>
References: <20221018-up-i350-thermal-bringup-v9-0-55a1ae14af74@baylibre.com>
 <20221018-up-i350-thermal-bringup-v9-2-55a1ae14af74@baylibre.com>
From:   Daniel Lezcano <daniel.lezcano@linaro.org>
In-Reply-To: <20221018-up-i350-thermal-bringup-v9-2-55a1ae14af74@baylibre.com>
Content-Type: text/plain; charset=UTF-8; format=flowed
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Precedence: bulk

On 27/01/2023 16:44, Amjad Ouled-Ameur wrote:
> From: Markus Schneider-Pargmann <msp@baylibre.com>
> 
> Add logic in order to be able to turn on the control buffer on MT8365.
> This change now allows to have control buffer support for MTK_THERMAL_V1,
> and it allows to define the register offset, and mask used to enable it.
> 
> Signed-off-by: Markus Schneider-Pargmann <msp@baylibre.com>
> Signed-off-by: Fabien Parent <fparent@baylibre.com>
> Signed-off-by: Amjad Ouled-Ameur <aouledameur@baylibre.com>
> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
> ---
>   drivers/thermal/mtk_thermal.c | 25 ++++++++++++++++++-------
>   1 file changed, 18 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/thermal/mtk_thermal.c b/drivers/thermal/mtk_thermal.c
> index 8440692e3890..d8ddceb75372 100644
> --- a/drivers/thermal/mtk_thermal.c
> +++ b/drivers/thermal/mtk_thermal.c
> @@ -271,6 +271,9 @@ struct mtk_thermal_data {
>   	bool need_switch_bank;
>   	struct thermal_bank_cfg bank_data[MAX_NUM_ZONES];
>   	enum mtk_thermal_version version;
> +	u32 apmixed_buffer_ctl_reg;
> +	u32 apmixed_buffer_ctl_mask;
> +	u32 apmixed_buffer_ctl_set;
>   };
>   
>   struct mtk_thermal {
> @@ -514,6 +517,9 @@ static const struct mtk_thermal_data mt7622_thermal_data = {
>   	.adcpnp = mt7622_adcpnp,
>   	.sensor_mux_values = mt7622_mux_values,
>   	.version = MTK_THERMAL_V2,
> +	.apmixed_buffer_ctl_reg = APMIXED_SYS_TS_CON1,
> +	.apmixed_buffer_ctl_mask = GENMASK(31, 6) | BIT(3),
> +	.apmixed_buffer_ctl_set = BIT(0),
>   };
>   
>   /*
> @@ -963,14 +969,18 @@ static const struct of_device_id mtk_thermal_of_match[] = {
>   };
>   MODULE_DEVICE_TABLE(of, mtk_thermal_of_match);
>   
> -static void mtk_thermal_turn_on_buffer(void __iomem *apmixed_base)
> +static void mtk_thermal_turn_on_buffer(struct mtk_thermal *mt,
> +				       void __iomem *apmixed_base)
>   {
> -	int tmp;
> +	u32 tmp;
> +
> +	if (!mt->conf->apmixed_buffer_ctl_reg)
> +		return;
>   
> -	tmp = readl(apmixed_base + APMIXED_SYS_TS_CON1);
> -	tmp &= ~(0x37);
> -	tmp |= 0x1;
> -	writel(tmp, apmixed_base + APMIXED_SYS_TS_CON1);
> +	tmp = readl(apmixed_base + mt->conf->apmixed_buffer_ctl_reg);
> +	tmp &= mt->conf->apmixed_buffer_ctl_mask;
> +	tmp |= mt->conf->apmixed_buffer_ctl_set;
> +	writel(tmp, apmixed_base + mt->conf->apmixed_buffer_ctl_reg);
>   	udelay(200);
>   }
>   
> @@ -1070,8 +1080,9 @@ static int mtk_thermal_probe(struct platform_device *pdev)
>   		goto err_disable_clk_auxadc;
>   	}
>   
> +	mtk_thermal_turn_on_buffer(mt, apmixed_base);
> +
>   	if (mt->conf->version == MTK_THERMAL_V2) {
> -		mtk_thermal_turn_on_buffer(apmixed_base);
>   		mtk_thermal_release_periodic_ts(mt, auxadc_base);
>   	}

This change conflicts with commit 4f2ee0aa2e706

I fixed it with:

-       if (mt->conf->version != MTK_THERMAL_V1) {
-               mtk_thermal_turn_on_buffer(apmixed_base);
+       mtk_thermal_turn_on_buffer(apmixed_base);
+
+       if (mt->conf->version != MTK_THERMAL_V1)
                 mtk_thermal_release_periodic_ts(mt, auxadc_base);
-       }

Let me know if there is something wrong.


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