linux-kernel - [PATCH v7 5/7] thermal/drivers/exynos: Remove unused base

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Message-ID: <20250813131007.343402-6-linux.amoon@gmail.com>
Date: Wed, 13 Aug 2025 18:39:49 +0530
From: Anand Moon <linux.amoon@...il.com>
To: Bartlomiej Zolnierkiewicz <bzolnier@...il.com>,
	Krzysztof Kozlowski <krzk@...nel.org>,
	"Rafael J. Wysocki" <rafael@...nel.org>,
	Daniel Lezcano <daniel.lezcano@...aro.org>,
	Zhang Rui <rui.zhang@...el.com>,
	Lukasz Luba <lukasz.luba@....com>,
	Alim Akhtar <alim.akhtar@...sung.com>,
	Nathan Chancellor <nathan@...nel.org>,
	Nick Desaulniers <nick.desaulniers+lkml@...il.com>,
	Bill Wendling <morbo@...gle.com>,
	Justin Stitt <justinstitt@...gle.com>,
	linux-pm@...r.kernel.org (open list:SAMSUNG THERMAL DRIVER),
	linux-samsung-soc@...r.kernel.org (open list:SAMSUNG THERMAL DRIVER),
	linux-arm-kernel@...ts.infradead.org (moderated list:ARM/SAMSUNG S3C, S5P AND EXYNOS ARM ARCHITECTURES),
	linux-kernel@...r.kernel.org (open list),
	llvm@...ts.linux.dev (open list:CLANG/LLVM BUILD SUPPORT:Keyword:\b(?i:clang|llvm)\b)
Cc: Anand Moon <linux.amoon@...il.com>,
	Mateusz Majewski <m.majewski2@...sung.com>
Subject: [PATCH v7 5/7] thermal/drivers/exynos: Remove unused base_second mapping and references

The base_second field has been removed from struct exynos_tmu_data
because it was unused. This cleanup also eliminates its mapping in
exynos_map_dt_data() and ensures that TRIMINFO access in
exynos4412_tmu_initialize() consistently uses the base field across
all SoCs. This streamlines the code and optimizes memory usage.

Signed-off-by: Anand Moon <linux.amoon@...il.com>
---
v7: new patch in this series,
   Improve the commit message
   simplify the logic to TRIMINFO for all SoC.
---
 drivers/thermal/samsung/exynos_tmu.c | 30 +++++++---------------------
 1 file changed, 7 insertions(+), 23 deletions(-)

diff --git a/drivers/thermal/samsung/exynos_tmu.c b/drivers/thermal/samsung/exynos_tmu.c
index 3d12e95703bf..146f29fadea9 100644
--- a/drivers/thermal/samsung/exynos_tmu.c
+++ b/drivers/thermal/samsung/exynos_tmu.c
@@ -139,12 +139,11 @@ enum soc_type {
  * struct exynos_tmu_data : A structure to hold the private data of the TMU
  *			    driver
  * @base: base address of the single instance of the TMU controller.
- * @base_second: base address of the common registers of the TMU controller.
  * @irq: irq number of the TMU controller.
  * @soc: id of the SOC type.
  * @lock: lock to implement synchronization.
  * @clk: pointer to the clock structure.
- * @clk_sec: pointer to the clock structure for accessing the base_second.
+ * @clk_sec: pointer to the clock structure for accessing the gpu clk.
  * @sclk: pointer to the clock structure for accessing the tmu special clk.
  * @cal_type: calibration type for temperature
  * @efuse_value: SoC defined fuse value
@@ -172,7 +171,6 @@ enum soc_type {
  */
 struct exynos_tmu_data {
 	void __iomem *base;
-	void __iomem *base_second;
 	int irq;
 	enum soc_type soc;
 	struct mutex lock;
@@ -444,24 +442,17 @@ static void exynos4412_tmu_initialize(struct platform_device *pdev)
 	struct exynos_tmu_data *data = platform_get_drvdata(pdev);
 	unsigned int trim_info, ctrl;
 
-	if (data->soc == SOC_ARCH_EXYNOS3250 ||
-	    data->soc == SOC_ARCH_EXYNOS4412 ||
-	    data->soc == SOC_ARCH_EXYNOS5250) {
-		if (data->soc == SOC_ARCH_EXYNOS3250) {
-			ctrl = readl(data->base + EXYNOS_TMU_TRIMINFO_CON1);
-			ctrl |= EXYNOS_TRIMINFO_RELOAD_ENABLE;
-			writel(ctrl, data->base + EXYNOS_TMU_TRIMINFO_CON1);
-		}
+	if (data->soc == SOC_ARCH_EXYNOS3250) {
+		ctrl = readl(data->base + EXYNOS_TMU_TRIMINFO_CON1);
+		ctrl |= EXYNOS_TRIMINFO_RELOAD_ENABLE;
+		writel(ctrl, data->base + EXYNOS_TMU_TRIMINFO_CON1);
+	} else {
 		ctrl = readl(data->base + EXYNOS_TMU_TRIMINFO_CON2);
 		ctrl |= EXYNOS_TRIMINFO_RELOAD_ENABLE;
 		writel(ctrl, data->base + EXYNOS_TMU_TRIMINFO_CON2);
 	}
 
-	/* On exynos5420 the triminfo register is in the shared space */
-	if (data->soc == SOC_ARCH_EXYNOS5420_TRIMINFO)
-		trim_info = readl(data->base_second + EXYNOS_TMU_REG_TRIMINFO);
-	else
-		trim_info = readl(data->base + EXYNOS_TMU_REG_TRIMINFO);
+	trim_info = readl(data->base + EXYNOS_TMU_REG_TRIMINFO);
 
 	sanitize_temp_error(data, trim_info);
 }
@@ -974,13 +965,6 @@ static int exynos_map_dt_data(struct platform_device *pdev)
 		return -ENODEV;
 	}
 
-	data->base_second = devm_ioremap(&pdev->dev, res.start,
-					resource_size(&res));
-	if (!data->base_second) {
-		dev_err(&pdev->dev, "Failed to ioremap memory\n");
-		return -ENOMEM;
-	}
-
 	return 0;
 }
 
-- 
2.50.1