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Thu, 11 Jul 2024 21:09:30 +0000 From: Frank Li Date: Thu, 11 Jul 2024 17:08:57 -0400 Subject: [PATCH 2/3] pwm: imx27: Add 32k clock for pwm in i.MX8QXP MIPI subsystem Message-Id: <20240711-pwm-v1-2-4d5766f99b8b@nxp.com> References: <20240711-pwm-v1-0-4d5766f99b8b@nxp.com> In-Reply-To: <20240711-pwm-v1-0-4d5766f99b8b@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, Frank Li , Liu Ying X-Mailer: b4 0.13-dev-e586c X-Developer-Signature: v=1; a=ed25519-sha256; t=1720732158; l=2498; i=Frank.Li@nxp.com; s=20240130; h=from:subject:message-id; bh=T8sTYpfSEeBY2/knCkc7BNYVCAkGkq10MM1DGu+SsPQ=; b=laVB2GjlhPvVez/dCnHfiC5J2Pd70yiRPMxc+6YKUpfyC8+AuOQuegC1xFUA2oIZDMFgyEpGo M/Fx/nzRQg/DtvkeFX17voA+4+JvrNHYGOKavnjPAEMZGGWSglnUCJ8 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 --- drivers/pwm/pwm-imx27.c | 33 ++++++++++++++++++++++++++++----- 1 file changed, 28 insertions(+), 5 deletions(-) diff --git a/drivers/pwm/pwm-imx27.c b/drivers/pwm/pwm-imx27.c index 9e2bbf5b4a8ce..032bce7d1fdd3 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 +103,36 @@ static int pwm_imx27_clk_prepare_enable(struct pwm_imx27_chip *imx) { int ret; + if (imx->clk_32k) { + 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: + if (imx->clk_32k) + 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); + if (imx->clk_32k) + clk_disable_unprepare(imx->clk_32k); } static int pwm_imx27_get_state(struct pwm_chip *chip, @@ -223,6 +238,7 @@ static int pwm_imx27_apply(struct pwm_chip *chip, struct pwm_device *pwm, struct pwm_imx27_chip *imx = to_pwm_imx27_chip(chip); unsigned long long c; unsigned long long clkrate; + int val; int ret; u32 cr; @@ -325,6 +341,13 @@ 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)) { + dev_err(&pdev->dev, "getting 32k clock failed with %ld\n", + PTR_ERR(imx->clk_32k)); + return PTR_ERR(imx->clk_32k); + } + chip->ops = &pwm_imx27_ops; imx->mmio_base = devm_platform_ioremap_resource(pdev, 0);