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Wysocki" , Daniel Lezcano , Amit Kucheria , Zhang Rui , Liam Girdwood , Mark Brown , Marek Szyprowski Subject: [PATCH 04/11] thermal: exynos: remove fine-grained clk management Date: Tue, 29 Aug 2023 11:18:42 +0200 Message-ID: <20230829091853.626011-5-m.majewski2@samsung.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230829091853.626011-1-m.majewski2@samsung.com> MIME-Version: 1.0 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFjrHKsWRmVeSWpSXmKPExsWy7djP87o2O9+mGOxu17V4MG8bm8Xh+RUW Ux8+YbP4vuU6k8WaveeYLOZ9lrWYf+Qcq0Xfi4fMFt+udDBZbHp8jdXi8q45bBafe48wWsw4 v4/JYuKxycwWa4/cZbeY+2Uqs0Xr3iPsFk8e9rE5CHnsnHWX3WPxnpdMHptWdbJ53Lm2h81j 85J6j74tqxg9Pm+SC2CP4rJJSc3JLEst0rdL4Mq4su4uU8EthYrnN5axNjD+kupi5OSQEDCR mPX5P2sXIxeHkMAKRomLH7exQzhfGCXOdW5mgnA+M0rcu7aVBablfsNuNojEcqCWtZcYIZxW JomWBx+ZQarYBAwkHrxZBjZLRGAxo8TWnbPAZjELzGWRaFj5E2yWsICXxNQLWxlBbBYBVYmW re/AbF4BW4nzx2ezQ+yTl3h+6w6YzSlgJzH9fDsTRI2gxMmZT8DmMAPVNG+dzQxRP51T4sxK NgjbRWL1iXaouLDEq+NboGbKSJye3AP1T77EjM3vgWwOILtC4u5BLwjTWuLjGWYQk1lAU2L9 Ln2IYkeJO82PWSEq+CRuvBWE2M8nMWnbdGaIMK9ER5sQRLWqxPE9k6DWS0s8abnNBGF7SNx+ c519AqPiLCSfzELyySyEvQsYmVcxiqeWFuempxYb56WW6xUn5haX5qXrJefnbmIEJrnT/45/ 3cG44tVHvUOMTByMhxglOJiVRHgvOb5KEeJNSaysSi3Kjy8qzUktPsQozcGiJM6rbXsyWUgg PbEkNTs1tSC1CCbLxMEp1cBU4eR6l4O/3Kiy7+ORV4me6/+ztd3+G/Bl0bkEuTkJ7ddmSW1+ tWrqsff6v88E3Cvn2SWaf51rdeRPRonaMx/uzKoS2jH1o09rWNzNKwfFp/mdn5C3Rf5oXM1M V40LnT7vJhjb7Lrpy+ry55mSx/fEjeVFTrvXz562QEvr77FMrw2PXizR5pEyVVwQf2rSujfn Z52fva/3am6dxd3InxsNLK4Za57LfNme1/P3vL7M0rBUp6ol4Rc33FC7qNJZI//c7c4+3YwJ AsorJXIjZulqXg9lD2Xc77HspS9DR4bevrM1389sfnq69Iu2VnXWeS9b6ftFK7XeLlq83jmm V/jmp13a63Uel9atzb3Rs+uHuhJLcUaioRZzUXEiAN82OdrhAwAA X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFjrAIsWRmVeSWpSXmKPExsVy+t/xe7o2O9+mGDw/JGDxYN42NovD8yss pj58wmbxfct1Jos1e88xWcz7LGsx/8g5Vou+Fw+ZLb5d6WCy2PT4GqvF5V1z2Cw+9x5htJhx fh+TxcRjk5kt1h65y24x98tUZovWvUfYLZ487GNzEPLYOesuu8fiPS+ZPDat6mTzuHNtD5vH 5iX1Hn1bVjF6fN4kF8AepWdTlF9akqqQkV9cYqsUbWhhpGdoaaFnZGKpZ2hsHmtlZKqkb2eT kpqTWZZapG+XoJdxZd1dpoJbChXPbyxjbWD8JdXFyMkhIWAicb9hN1sXIxeHkMBSRom/fe2M EAlpicNfprBD2MISf651QRU1M0kseb6FBSTBJmAg8eDNMnaQhIjAckaJq/eWs4A4zALLWSSe r/nADFIlLOAlMfXCVrCxLAKqEi1b34HZvAK2EuePz4ZaIS/x/NYdMJtTwE5i+vl2JhBbCKhm zYRzbBD1ghInZz4B28wMVN+8dTbzBEaBWUhSs5CkFjAyrWIUSS0tzk3PLTbUK07MLS7NS9dL zs/dxAiMym3Hfm7ewTjv1Ue9Q4xMHIyHGCU4mJVEeC85vkoR4k1JrKxKLcqPLyrNSS0+xGgK dPdEZinR5HxgWsgriTc0MzA1NDGzNDC1NDNWEuf1LOhIFBJITyxJzU5NLUgtgulj4uCUamAy z4xzPZB5XYxFzPxXv/30QB6lpqqlMmsW5exz/JT/mmn1mt+zfz06vztmhde0uew3ivKPGRc1 8tUnaoVs/cI84e3TQMF5NSt3nA25pniRd7772wZFoTb/TRtrsg5opbd/jjA7+oyD2eLtxSXq Fq4zOy4yOHrb34qqLiiYduP1RdO3X1iW1tnzXOd7VC0258zHBU9ZJMqWWh95nDdDw/f75oW2 7lvezVoryxNuz57ywHmVTGLytw35s+bdC/wgeY6x/wXzV95PXFzT9zfxvSpW5zHe6nvIa8fE v/r3LjDM1lyeE8HMUqYp+luK0+BB7/OeKRPEonxazf5UpjzIcdx83MFeJcVe5Kdd+FR2h7lK LMUZiYZazEXFiQDCK5BvUwMAAA== X-CMS-MailID: 20230829092412eucas1p2b79a6f90b9077a3a5486845b7e68bbc6 X-Msg-Generator: CA X-RootMTR: 20230829092412eucas1p2b79a6f90b9077a3a5486845b7e68bbc6 X-EPHeader: CA CMS-TYPE: 201P X-CMS-RootMailID: 20230829092412eucas1p2b79a6f90b9077a3a5486845b7e68bbc6 References: <20230829091853.626011-1-m.majewski2@samsung.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230829_022414_873745_BA43AAD5 X-CRM114-Status: GOOD ( 16.62 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org This clock only controls the register operations. The gain in power efficiency is therefore quite dubious, while there is price of added complexity that is important to get right (as a register operation might outright hang the CPU if the clock is not enabled). Signed-off-by: Mateusz Majewski --- drivers/thermal/samsung/exynos_tmu.c | 25 +++---------------------- 1 file changed, 3 insertions(+), 22 deletions(-) diff --git a/drivers/thermal/samsung/exynos_tmu.c b/drivers/thermal/samsung/exynos_tmu.c index 35b0a55017ad..2c5501704911 100644 --- a/drivers/thermal/samsung/exynos_tmu.c +++ b/drivers/thermal/samsung/exynos_tmu.c @@ -275,7 +275,6 @@ static int exynos_tmu_initialize(struct platform_device *pdev) } mutex_lock(&data->lock); - clk_enable(data->clk); if (!IS_ERR(data->clk_sec)) clk_enable(data->clk_sec); @@ -305,7 +304,6 @@ static int exynos_tmu_initialize(struct platform_device *pdev) data->tmu_clear_irqs(data); } err: - clk_disable(data->clk); mutex_unlock(&data->lock); if (!IS_ERR(data->clk_sec)) clk_disable(data->clk_sec); @@ -336,10 +334,8 @@ static void exynos_tmu_control(struct platform_device *pdev, bool on) struct exynos_tmu_data *data = platform_get_drvdata(pdev); mutex_lock(&data->lock); - clk_enable(data->clk); data->tmu_control(pdev, on); data->enabled = on; - clk_disable(data->clk); mutex_unlock(&data->lock); } @@ -654,7 +650,6 @@ static int exynos_get_temp(struct thermal_zone_device *tz, int *temp) return -EAGAIN; mutex_lock(&data->lock); - clk_enable(data->clk); value = data->tmu_read(data); if (value < 0) @@ -662,7 +657,6 @@ static int exynos_get_temp(struct thermal_zone_device *tz, int *temp) else *temp = code_to_temp(data, value) * MCELSIUS; - clk_disable(data->clk); mutex_unlock(&data->lock); return ret; @@ -729,9 +723,7 @@ static int exynos_tmu_set_emulation(struct thermal_zone_device *tz, int temp) goto out; mutex_lock(&data->lock); - clk_enable(data->clk); data->tmu_set_emulation(data, temp); - clk_disable(data->clk); mutex_unlock(&data->lock); return 0; out: @@ -769,12 +761,10 @@ static irqreturn_t exynos_tmu_threaded_irq(int irq, void *id) thermal_zone_device_update(data->tzd, THERMAL_EVENT_UNSPECIFIED); mutex_lock(&data->lock); - clk_enable(data->clk); /* TODO: take action based on particular interrupt */ data->tmu_clear_irqs(data); - clk_disable(data->clk); mutex_unlock(&data->lock); return IRQ_HANDLED; @@ -1012,7 +1002,7 @@ static int exynos_tmu_probe(struct platform_device *pdev) if (ret) goto err_sensor; - data->clk = devm_clk_get(&pdev->dev, "tmu_apbif"); + data->clk = devm_clk_get_enabled(&pdev->dev, "tmu_apbif"); if (IS_ERR(data->clk)) { dev_err(&pdev->dev, "Failed to get clock\n"); ret = PTR_ERR(data->clk); @@ -1034,12 +1024,6 @@ static int exynos_tmu_probe(struct platform_device *pdev) } } - ret = clk_prepare(data->clk); - if (ret) { - dev_err(&pdev->dev, "Failed to get clock\n"); - goto err_clk_sec; - } - switch (data->soc) { case SOC_ARCH_EXYNOS5433: case SOC_ARCH_EXYNOS7: @@ -1047,12 +1031,12 @@ static int exynos_tmu_probe(struct platform_device *pdev) if (IS_ERR(data->sclk)) { dev_err(&pdev->dev, "Failed to get sclk\n"); ret = PTR_ERR(data->sclk); - goto err_clk; + goto err_clk_sec; } else { ret = clk_prepare_enable(data->sclk); if (ret) { dev_err(&pdev->dev, "Failed to enable sclk\n"); - goto err_clk; + goto err_clk_sec; } } break; @@ -1094,8 +1078,6 @@ static int exynos_tmu_probe(struct platform_device *pdev) err_sclk: clk_disable_unprepare(data->sclk); -err_clk: - clk_unprepare(data->clk); err_clk_sec: if (!IS_ERR(data->clk_sec)) clk_unprepare(data->clk_sec); @@ -1113,7 +1095,6 @@ static int exynos_tmu_remove(struct platform_device *pdev) exynos_tmu_control(pdev, false); clk_disable_unprepare(data->sclk); - clk_unprepare(data->clk); if (!IS_ERR(data->clk_sec)) clk_unprepare(data->clk_sec);