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From:   Amjad Ouled-Ameur <aouledameur@baylibre.com>
To:     matthias.bgg@gmail.com
Cc:     Markus Schneider-Pargmann <msp@baylibre.com>, rafael@kernel.org,
        fparent@baylibre.com, amitk@kernel.org, daniel.lezcano@linaro.org,
        devicetree@vger.kernel.org, krzysztof.kozlowski+dt@linaro.org,
        linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org,
        linux-mediatek@lists.infradead.org, linux-pm@vger.kernel.org,
        robh+dt@kernel.org, rui.zhang@intel.com,
        Amjad Ouled-Ameur <aouledameur@baylibre.com>
Subject: [PATCH v3 2/4] thermal: mediatek: control buffer enablement tweaks
Date:   Thu,  1 Sep 2022 15:39:48 +0200
Message-Id: <20220901133950.115122-3-aouledameur@baylibre.com>
In-Reply-To: <20220901133950.115122-1-aouledameur@baylibre.com>
References: <20220901133950.115122-1-aouledameur@baylibre.com>
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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>
---
Changes in V3:
- Use GENMASK() and BIT() instead of hardcoded data.
- Use u32 instead of int for "tmp" var in mtk_thermal_turn_on_buffer() 

 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 ede94eadddda..b5b4401249e8 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);
 	}
 
-- 
2.37.3