linux-kernel - [RRC v1 1/3] thermal/drivers/exynos: Remove unused base

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Message-ID: <20250616163831.8138-2-linux.amoon@gmail.com>
Date: Mon, 16 Jun 2025 22:08:22 +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>,
	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)
Cc: Anand Moon <linux.amoon@...il.com>
Subject: [RRC v1 1/3] thermal/drivers/exynos: Remove unused base_second mapping and references

Following change removes the base_second field eliminates its mapping
in exynos_map_dt_data(), and updates the TRIMINFO access logic in
exynos4412_tmu_initialize() to use base for both Exynos5420 and
Exynos5420_TRIMINFO SoCs, as base_second is not used further in
in this code.
This cleanup simplifies the code and reduces unnecessary
memory mapping.

Signed-off-by: Anand Moon <linux.amoon@...il.com>
---
 drivers/thermal/samsung/exynos_tmu.c | 20 +++++---------------
 1 file changed, 5 insertions(+), 15 deletions(-)

diff --git a/drivers/thermal/samsung/exynos_tmu.c b/drivers/thermal/samsung/exynos_tmu.c
index 47a99b3c5395..c625eddcb9f3 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;
@@ -460,12 +458,11 @@ static void exynos4412_tmu_initialize(struct platform_device *pdev)
 	}
 
 	/* 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
+	if (data->soc == SOC_ARCH_EXYNOS5420 ||
+			data->soc == SOC_ARCH_EXYNOS5420_TRIMINFO) {
 		trim_info = readl(data->base + EXYNOS_TMU_REG_TRIMINFO);
-
-	sanitize_temp_error(data, trim_info);
+		sanitize_temp_error(data, trim_info);
+	}
 }
 
 static void exynos5433_tmu_set_low_temp(struct exynos_tmu_data *data, u8 temp)
@@ -964,13 +961,6 @@ 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;
 }
 
-- 
2.49.0