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Mon, 15 Jul 2024 20:30:20 +0000 From: Frank Li Date: Mon, 15 Jul 2024 16:29:51 -0400 Subject: [PATCH v2 2/3] pwm: imx27: Add 32k clock for pwm in i.MX8QXP MIPI subsystem Message-Id: <20240715-pwm-v2-2-ff3eece83cbb@nxp.com> References: <20240715-pwm-v2-0-ff3eece83cbb@nxp.com> In-Reply-To: <20240715-pwm-v2-0-ff3eece83cbb@nxp.com> To: =?utf-8?q?Uwe_Kleine-K=C3=B6nig?= , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Shawn Guo , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , Philipp Zabel Cc: linux-pwm@vger.kernel.org, devicetree@vger.kernel.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, pratikmanvar09@gmail.com, francesco@dolcini.it, Frank Li , Liu Ying X-Mailer: b4 0.13-dev-e586c X-Developer-Signature: v=1; a=ed25519-sha256; t=1721075406; l=2230; i=Frank.Li@nxp.com; s=20240130; h=from:subject:message-id; bh=8yBI5EIYzxRTzuANn9Ot3THiqvcs2WYhNhHWeOps8hY=; b=9W8dQzaH/wpxantqymPObtuegzGNviX6HqCOqhUR306/oXEerxfMke0+ZUgzegKSJok5btyQ7 aEBj8gM518sBtzkqYZJOWfGrA3uRLxVtawfGjgHQQUJD1s08PradoE9 X-Developer-Key: i=Frank.Li@nxp.com; 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Use it if the DTS provides that. Signed-off-by: Liu Ying Signed-off-by: Frank Li --- Change from v1 to v2 - remove if check for clk - use dev_err_probe - remove int val --- drivers/pwm/pwm-imx27.c | 26 +++++++++++++++++++++----- 1 file changed, 21 insertions(+), 5 deletions(-) diff --git a/drivers/pwm/pwm-imx27.c b/drivers/pwm/pwm-imx27.c index 9e2bbf5b4a8ce..253afe94c4776 100644 --- a/drivers/pwm/pwm-imx27.c +++ b/drivers/pwm/pwm-imx27.c @@ -15,6 +15,7 @@ #include #include #include +#include #include #include #include @@ -82,6 +83,7 @@ struct pwm_imx27_chip { struct clk *clk_ipg; struct clk *clk_per; + struct clk *clk_32k; void __iomem *mmio_base; /* @@ -101,23 +103,32 @@ static int pwm_imx27_clk_prepare_enable(struct pwm_imx27_chip *imx) { int ret; + ret = clk_prepare_enable(imx->clk_32k); + if (ret) + goto err1; + ret = clk_prepare_enable(imx->clk_ipg); if (ret) - return ret; + goto err2; ret = clk_prepare_enable(imx->clk_per); - if (ret) { - clk_disable_unprepare(imx->clk_ipg); - return ret; - } + if (ret) + goto err3; return 0; +err3: + clk_disable_unprepare(imx->clk_ipg); +err2: + clk_disable_unprepare(imx->clk_32k); +err1: + return ret; } static void pwm_imx27_clk_disable_unprepare(struct pwm_imx27_chip *imx) { clk_disable_unprepare(imx->clk_per); clk_disable_unprepare(imx->clk_ipg); + clk_disable_unprepare(imx->clk_32k); } static int pwm_imx27_get_state(struct pwm_chip *chip, @@ -325,6 +336,11 @@ static int pwm_imx27_probe(struct platform_device *pdev) return dev_err_probe(&pdev->dev, PTR_ERR(imx->clk_per), "failed to get peripheral clock\n"); + imx->clk_32k = devm_clk_get_optional(&pdev->dev, "32k"); + if (IS_ERR(imx->clk_32k)) + return dev_err_probe(&pdev->dev, PTR_ERR(imx->clk_32k), + "failed to get 32k clock\n"); + chip->ops = &pwm_imx27_ops; imx->mmio_base = devm_platform_ioremap_resource(pdev, 0);