linux-kernel - [PATCH v2 6/9] thermal: exynos: simplify temp_to_code() and code_to

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Date:	Tue, 17 Jun 2014 19:27:22 +0200
From:	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
To:	Eduardo Valentin <eduardo.valentin@...com>
Cc:	Zhang Rui <rui.zhang@...el.com>,
	Amit Daniel Kachhap <amit.daniel@...sung.com>,
	Tomasz Figa <t.figa@...sung.com>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Kyungmin Park <kyungmin.park@...sung.com>,
	linux-samsung-soc@...r.kernel.org, linux-pm@...r.kernel.org,
	linux-kernel@...r.kernel.org, b.zolnierkie@...sung.com
Subject: [PATCH v2 6/9] thermal: exynos: simplify temp_to_code() and
 code_to_temp()

* Remove dead temp check from temp_to_code() (this function users
  in exynos_tmu_initialize() always pass correct temperatures and
  exynos_tmu_set_emulation() returns early for EXYNOS4210 because
  TMU_SUPPORT_EMULATION flag is not set on this SoC).

* Move temp_code check from code_to_temp() to exynos_tmu_read()
  (code_to_temp() only user).

There should be no functional changes caused by this patch.

Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
Acked-by: Kyungmin Park <kyungmin.park@...sung.com>
Reviewed-by: Amit Daniel Kachhap<amit.daniel@...sung.com>
---
 drivers/thermal/samsung/exynos_tmu.c | 38 +++++++++++-------------------------
 1 file changed, 11 insertions(+), 27 deletions(-)

diff --git a/drivers/thermal/samsung/exynos_tmu.c b/drivers/thermal/samsung/exynos_tmu.c
index 204f811..34ac081 100644
--- a/drivers/thermal/samsung/exynos_tmu.c
+++ b/drivers/thermal/samsung/exynos_tmu.c
@@ -72,19 +72,7 @@ struct exynos_tmu_data {
  */
 static int temp_to_code(struct exynos_tmu_data *data, u8 temp)
 {
-	struct exynos_tmu_platform_data *pdata = data->pdata;
-	int temp_code;
-
-	if (data->soc == SOC_ARCH_EXYNOS4210)
-		/* temp should range between 25 and 125 */
-		if (temp < 25 || temp > 125) {
-			temp_code = -EINVAL;
-			goto out;
-		}
-
-	temp_code = temp + data->temp_error - pdata->first_point_trim;
-out:
-	return temp_code;
+	return temp + data->temp_error - data->pdata->first_point_trim;
 }
 
 /*
@@ -93,19 +81,7 @@ out:
  */
 static int code_to_temp(struct exynos_tmu_data *data, u8 temp_code)
 {
-	struct exynos_tmu_platform_data *pdata = data->pdata;
-	int temp;
-
-	if (data->soc == SOC_ARCH_EXYNOS4210)
-		/* temp_code should range between 75 and 175 */
-		if (temp_code < 75 || temp_code > 175) {
-			temp = -ENODATA;
-			goto out;
-		}
-
-	temp = temp_code - data->temp_error + pdata->first_point_trim;
-out:
-	return temp;
+	return temp_code - data->temp_error + data->pdata->first_point_trim;
 }
 
 static int exynos_tmu_initialize(struct platform_device *pdev)
@@ -311,8 +287,16 @@ static int exynos_tmu_read(struct exynos_tmu_data *data)
 	clk_enable(data->clk);
 
 	temp_code = readb(data->base + reg->tmu_cur_temp);
-	temp = code_to_temp(data, temp_code);
 
+	if (data->soc == SOC_ARCH_EXYNOS4210)
+		/* temp_code should range between 75 and 175 */
+		if (temp_code < 75 || temp_code > 175) {
+			temp = -ENODATA;
+			goto out;
+		}
+
+	temp = code_to_temp(data, temp_code);
+out:
 	clk_disable(data->clk);
 	mutex_unlock(&data->lock);
 
-- 
1.8.2.3

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