From: Sascha Hauer <s.hauer@pengutronix.de>
To: YH Huang <yh.huang@mediatek.com>
Cc: Matthias Brugger <matthias.bgg@gmail.com>,
Mark Rutland <mark.rutland@arm.com>,
Thierry Reding <thierry.reding@gmail.com>,
Rob Herring <robh+dt@kernel.org>, Pawel Moll <pawel.moll@arm.com>,
linux-pwm@vger.kernel.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
srv_heupstream@mediatek.com, linux-mediatek@lists.infradead.org,
Sascha Hauer <kernel@pengutronix.de>
Subject: Re: [PATCH 2/2] pwm: add Mediatek display PWM driver support
Date: Tue, 12 May 2015 15:00:05 +0200 [thread overview]
Message-ID: <20150512130005.GS6325@pengutronix.de> (raw)
In-Reply-To: <1431336382-13167-3-git-send-email-yh.huang@mediatek.com>
On Mon, May 11, 2015 at 05:26:22PM +0800, YH Huang wrote:
> +
> +static int mtk_disp_pwm_probe(struct platform_device *pdev)
> +{
> + struct mtk_disp_pwm_chip *pwm;
The struct mtk_disp_pwm_chip * is named 'mpc' in the other functions.
For consistency reasons you should do that here aswell.
> + struct resource *r;
> + int ret;
> +
> + pwm = devm_kzalloc(&pdev->dev, sizeof(*pwm), GFP_KERNEL);
> + if (!pwm)
> + return -ENOMEM;
> +
> + pwm->dev = &pdev->dev;
> +
> + r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> + pwm->mmio_base = devm_ioremap_resource(&pdev->dev, r);
> + if (IS_ERR(pwm->mmio_base))
> + return PTR_ERR(pwm->mmio_base);
> +
> + pwm->clk_main = devm_clk_get(&pdev->dev, "main");
> + if (IS_ERR(pwm->clk_main))
> + return PTR_ERR(pwm->clk_main);
> + pwm->clk_mm = devm_clk_get(&pdev->dev, "mm");
> + if (IS_ERR(pwm->clk_mm))
> + return PTR_ERR(pwm->clk_mm);
> +
> + ret = clk_prepare_enable(pwm->clk_main);
> + if (ret < 0)
> + return ret;
> + ret = clk_prepare_enable(pwm->clk_mm);
> + if (ret < 0) {
> + clk_disable_unprepare(pwm->clk_main);
> + return ret;
> + }
> +
> + platform_set_drvdata(pdev, pwm);
> +
> + pwm->chip.dev = &pdev->dev;
> + pwm->chip.ops = &mtk_disp_pwm_ops;
> + pwm->chip.base = -1;
> + pwm->chip.npwm = NUM_PWM;
> +
> + ret = pwmchip_add(&pwm->chip);
> + if (ret < 0) {
> + dev_err(&pdev->dev, "pwmchip_add() failed: %d\n", ret);
> + return ret;
This error path leaves the clocks enabled.
> + }
> +
> + return 0;
> +}
> +
> +static int mtk_disp_pwm_remove(struct platform_device *pdev)
> +{
> + struct mtk_disp_pwm_chip *pc = platform_get_drvdata(pdev);
> +
> + if (WARN_ON(!pc))
> + return -ENODEV;
> +
> + clk_disable_unprepare(pc->clk_main);
> + clk_disable_unprepare(pc->clk_mm);
> +
> + return pwmchip_remove(&pc->chip);
You should first remove the pwmchip and disable the clocks afterwards.
Also note that this function can fail.
Sascha
--
Pengutronix e.K. | |
Industrial Linux Solutions | http://www.pengutronix.de/ |
Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 |
Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |
WARNING: multiple messages have this Message-ID (diff)
From: Sascha Hauer <s.hauer-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>
To: YH Huang <yh.huang-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>
Cc: Matthias Brugger
<matthias.bgg-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
Mark Rutland <mark.rutland-5wv7dgnIgG8@public.gmane.org>,
Thierry Reding
<thierry.reding-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
Rob Herring <robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
Pawel Moll <pawel.moll-5wv7dgnIgG8@public.gmane.org>,
linux-pwm-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
srv_heupstream-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org,
linux-mediatek-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
Sascha Hauer <kernel-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>
Subject: Re: [PATCH 2/2] pwm: add Mediatek display PWM driver support
Date: Tue, 12 May 2015 15:00:05 +0200 [thread overview]
Message-ID: <20150512130005.GS6325@pengutronix.de> (raw)
In-Reply-To: <1431336382-13167-3-git-send-email-yh.huang-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>
On Mon, May 11, 2015 at 05:26:22PM +0800, YH Huang wrote:
> +
> +static int mtk_disp_pwm_probe(struct platform_device *pdev)
> +{
> + struct mtk_disp_pwm_chip *pwm;
The struct mtk_disp_pwm_chip * is named 'mpc' in the other functions.
For consistency reasons you should do that here aswell.
> + struct resource *r;
> + int ret;
> +
> + pwm = devm_kzalloc(&pdev->dev, sizeof(*pwm), GFP_KERNEL);
> + if (!pwm)
> + return -ENOMEM;
> +
> + pwm->dev = &pdev->dev;
> +
> + r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> + pwm->mmio_base = devm_ioremap_resource(&pdev->dev, r);
> + if (IS_ERR(pwm->mmio_base))
> + return PTR_ERR(pwm->mmio_base);
> +
> + pwm->clk_main = devm_clk_get(&pdev->dev, "main");
> + if (IS_ERR(pwm->clk_main))
> + return PTR_ERR(pwm->clk_main);
> + pwm->clk_mm = devm_clk_get(&pdev->dev, "mm");
> + if (IS_ERR(pwm->clk_mm))
> + return PTR_ERR(pwm->clk_mm);
> +
> + ret = clk_prepare_enable(pwm->clk_main);
> + if (ret < 0)
> + return ret;
> + ret = clk_prepare_enable(pwm->clk_mm);
> + if (ret < 0) {
> + clk_disable_unprepare(pwm->clk_main);
> + return ret;
> + }
> +
> + platform_set_drvdata(pdev, pwm);
> +
> + pwm->chip.dev = &pdev->dev;
> + pwm->chip.ops = &mtk_disp_pwm_ops;
> + pwm->chip.base = -1;
> + pwm->chip.npwm = NUM_PWM;
> +
> + ret = pwmchip_add(&pwm->chip);
> + if (ret < 0) {
> + dev_err(&pdev->dev, "pwmchip_add() failed: %d\n", ret);
> + return ret;
This error path leaves the clocks enabled.
> + }
> +
> + return 0;
> +}
> +
> +static int mtk_disp_pwm_remove(struct platform_device *pdev)
> +{
> + struct mtk_disp_pwm_chip *pc = platform_get_drvdata(pdev);
> +
> + if (WARN_ON(!pc))
> + return -ENODEV;
> +
> + clk_disable_unprepare(pc->clk_main);
> + clk_disable_unprepare(pc->clk_mm);
> +
> + return pwmchip_remove(&pc->chip);
You should first remove the pwmchip and disable the clocks afterwards.
Also note that this function can fail.
Sascha
--
Pengutronix e.K. | |
Industrial Linux Solutions | http://www.pengutronix.de/ |
Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 |
Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |
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WARNING: multiple messages have this Message-ID (diff)
From: s.hauer@pengutronix.de (Sascha Hauer)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 2/2] pwm: add Mediatek display PWM driver support
Date: Tue, 12 May 2015 15:00:05 +0200 [thread overview]
Message-ID: <20150512130005.GS6325@pengutronix.de> (raw)
In-Reply-To: <1431336382-13167-3-git-send-email-yh.huang@mediatek.com>
On Mon, May 11, 2015 at 05:26:22PM +0800, YH Huang wrote:
> +
> +static int mtk_disp_pwm_probe(struct platform_device *pdev)
> +{
> + struct mtk_disp_pwm_chip *pwm;
The struct mtk_disp_pwm_chip * is named 'mpc' in the other functions.
For consistency reasons you should do that here aswell.
> + struct resource *r;
> + int ret;
> +
> + pwm = devm_kzalloc(&pdev->dev, sizeof(*pwm), GFP_KERNEL);
> + if (!pwm)
> + return -ENOMEM;
> +
> + pwm->dev = &pdev->dev;
> +
> + r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> + pwm->mmio_base = devm_ioremap_resource(&pdev->dev, r);
> + if (IS_ERR(pwm->mmio_base))
> + return PTR_ERR(pwm->mmio_base);
> +
> + pwm->clk_main = devm_clk_get(&pdev->dev, "main");
> + if (IS_ERR(pwm->clk_main))
> + return PTR_ERR(pwm->clk_main);
> + pwm->clk_mm = devm_clk_get(&pdev->dev, "mm");
> + if (IS_ERR(pwm->clk_mm))
> + return PTR_ERR(pwm->clk_mm);
> +
> + ret = clk_prepare_enable(pwm->clk_main);
> + if (ret < 0)
> + return ret;
> + ret = clk_prepare_enable(pwm->clk_mm);
> + if (ret < 0) {
> + clk_disable_unprepare(pwm->clk_main);
> + return ret;
> + }
> +
> + platform_set_drvdata(pdev, pwm);
> +
> + pwm->chip.dev = &pdev->dev;
> + pwm->chip.ops = &mtk_disp_pwm_ops;
> + pwm->chip.base = -1;
> + pwm->chip.npwm = NUM_PWM;
> +
> + ret = pwmchip_add(&pwm->chip);
> + if (ret < 0) {
> + dev_err(&pdev->dev, "pwmchip_add() failed: %d\n", ret);
> + return ret;
This error path leaves the clocks enabled.
> + }
> +
> + return 0;
> +}
> +
> +static int mtk_disp_pwm_remove(struct platform_device *pdev)
> +{
> + struct mtk_disp_pwm_chip *pc = platform_get_drvdata(pdev);
> +
> + if (WARN_ON(!pc))
> + return -ENODEV;
> +
> + clk_disable_unprepare(pc->clk_main);
> + clk_disable_unprepare(pc->clk_mm);
> +
> + return pwmchip_remove(&pc->chip);
You should first remove the pwmchip and disable the clocks afterwards.
Also note that this function can fail.
Sascha
--
Pengutronix e.K. | |
Industrial Linux Solutions | http://www.pengutronix.de/ |
Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 |
Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |
next prev parent reply other threads:[~2015-05-12 13:00 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-11 9:26 [PATCH 0/2] Add Mediatek display PWM driver YH Huang
2015-05-11 9:26 ` YH Huang
2015-05-11 9:26 ` YH Huang
2015-05-11 9:26 ` [PATCH 1/2] dt-bindings: pwm: add Mediatek display PWM bindings YH Huang
2015-05-11 9:26 ` YH Huang
2015-05-11 9:26 ` YH Huang
2015-05-11 9:26 ` [PATCH 2/2] pwm: add Mediatek display PWM driver support YH Huang
2015-05-11 9:26 ` YH Huang
2015-05-11 9:26 ` YH Huang
2015-05-12 12:37 ` Matthias Brugger
2015-05-12 12:37 ` Matthias Brugger
2015-05-12 12:37 ` Matthias Brugger
2015-05-12 12:44 ` Matthias Brugger
2015-05-12 12:44 ` Matthias Brugger
2015-05-12 12:44 ` Matthias Brugger
2015-05-14 14:45 ` YH Huang
2015-05-14 14:45 ` YH Huang
2015-05-14 14:45 ` YH Huang
2015-05-14 14:39 ` YH Huang
2015-05-14 14:39 ` YH Huang
2015-05-14 14:39 ` YH Huang
2015-05-12 13:00 ` Sascha Hauer [this message]
2015-05-12 13:00 ` Sascha Hauer
2015-05-12 13:00 ` Sascha Hauer
2015-05-14 14:52 ` YH Huang
2015-05-14 14:52 ` YH Huang
2015-05-14 14:52 ` YH Huang
2015-05-12 13:32 ` Thierry Reding
2015-05-12 13:32 ` Thierry Reding
2015-05-12 14:34 ` Matthias Brugger
2015-05-12 14:34 ` Matthias Brugger
2015-05-12 14:34 ` Matthias Brugger
2015-05-14 15:39 ` YH Huang
2015-05-14 15:39 ` YH Huang
2015-05-14 15:39 ` YH Huang
2015-05-14 15:35 ` YH Huang
2015-05-14 15:35 ` YH Huang
2015-05-14 15:35 ` YH Huang
2015-05-18 3:42 ` Daniel Kurtz
2015-05-18 3:42 ` Daniel Kurtz
2015-05-18 3:42 ` Daniel Kurtz
2015-05-21 8:22 ` YH Huang
2015-05-21 8:22 ` YH Huang
2015-05-21 8:22 ` YH Huang
2015-05-26 6:05 ` Sascha Hauer
2015-05-26 6:05 ` Sascha Hauer
2015-05-26 6:05 ` Sascha Hauer
2015-05-26 8:29 ` Yingjoe Chen
2015-05-26 8:29 ` Yingjoe Chen
2015-05-26 8:29 ` Yingjoe Chen
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