From: "Uwe Kleine-König" <u.kleine-koenig@pengutronix.de> To: "Clément Péron" <peron.clem@gmail.com> Cc: Thierry Reding <thierry.reding@gmail.com>, Rob Herring <robh+dt@kernel.org>, Mark Rutland <mark.rutland@arm.com>, Maxime Ripard <mripard@kernel.org>, Chen-Yu Tsai <wens@csie.org>, linux-pwm@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Jernej Skrabec <jernej.skrabec@siol.net>, Philipp Zabel <p.zabel@pengutronix.de> Subject: Re: [PATCH v2 2/7] pwm: sun4i: Add an optional probe for reset line Date: Mon, 4 Nov 2019 09:11:57 +0100 [thread overview] Message-ID: <20191104081157.373v22atswsaktbe@pengutronix.de> (raw) In-Reply-To: <20191103203334.10539-3-peron.clem@gmail.com> Hello, adding Philipp Zabel (= reset controller maintainer) to Cc: and so I'm not stripping the uncommented parts of the patch. On Sun, Nov 03, 2019 at 09:33:29PM +0100, Clément Péron wrote: > From: Jernej Skrabec <jernej.skrabec@siol.net> > > H6 PWM core needs deasserted reset line in order to work. > > Add an optional probe for it. > > Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net> > Signed-off-by: Clément Péron <peron.clem@gmail.com> > --- > drivers/pwm/pwm-sun4i.c | 32 ++++++++++++++++++++++++++++++-- > 1 file changed, 30 insertions(+), 2 deletions(-) > > diff --git a/drivers/pwm/pwm-sun4i.c b/drivers/pwm/pwm-sun4i.c > index 6f5840a1a82d..d194b8ebdb00 100644 > --- a/drivers/pwm/pwm-sun4i.c > +++ b/drivers/pwm/pwm-sun4i.c > @@ -16,6 +16,7 @@ > #include <linux/of_device.h> > #include <linux/platform_device.h> > #include <linux/pwm.h> > +#include <linux/reset.h> > #include <linux/slab.h> > #include <linux/spinlock.h> > #include <linux/time.h> > @@ -78,6 +79,7 @@ struct sun4i_pwm_data { > struct sun4i_pwm_chip { > struct pwm_chip chip; > struct clk *clk; > + struct reset_control *rst; > void __iomem *base; > spinlock_t ctrl_lock; > const struct sun4i_pwm_data *data; > @@ -365,6 +367,20 @@ static int sun4i_pwm_probe(struct platform_device *pdev) > if (IS_ERR(pwm->clk)) > return PTR_ERR(pwm->clk); > > + pwm->rst = devm_reset_control_get_optional(&pdev->dev, NULL); > + if (IS_ERR(pwm->rst)) { > + if (PTR_ERR(pwm->rst) == -EPROBE_DEFER) > + return PTR_ERR(pwm->rst); > + dev_info(&pdev->dev, "no reset control found\n"); I would degrade this to a dev_dbg. Otherwise this spams the log for all unaffected machines. devm_reset_control_get_optional() is defined in a section that has a comment "These inline function calls will be removed once all consumers have been moved over to the new explicit API.", so I guess you want devm_reset_control_get_optional_exclusive or even devm_reset_control_get_optional_shared here. @Philipp: maybe a check in checkpatch that warns about introduction of such new instances would be good?! > + } > + > + /* Deassert reset */ > + ret = reset_control_deassert(pwm->rst); > + if (ret) { > + dev_err(&pdev->dev, "Cannot deassert reset control\n"); > + return ret; > + } > + > pwm->chip.dev = &pdev->dev; > pwm->chip.ops = &sun4i_pwm_ops; > pwm->chip.base = -1; > @@ -377,19 +393,31 @@ static int sun4i_pwm_probe(struct platform_device *pdev) > ret = pwmchip_add(&pwm->chip); > if (ret < 0) { > dev_err(&pdev->dev, "failed to add PWM chip: %d\n", ret); > - return ret; > + goto err_pwm_add; > } > > platform_set_drvdata(pdev, pwm); > > return 0; > + > +err_pwm_add: > + reset_control_assert(pwm->rst); > + > + return ret; > } > > static int sun4i_pwm_remove(struct platform_device *pdev) > { > struct sun4i_pwm_chip *pwm = platform_get_drvdata(pdev); > + int ret; > + > + ret = pwmchip_remove(&pwm->chip); > + if (ret) > + return ret; > + > + reset_control_assert(pwm->rst); > > - return pwmchip_remove(&pwm->chip); > + return 0; > } > > static struct platform_driver sun4i_pwm_driver = { Best regards Uwe -- Pengutronix e.K. | Uwe Kleine-König | Industrial Linux Solutions | http://www.pengutronix.de/ |
WARNING: multiple messages have this Message-ID (diff)
From: "Uwe Kleine-König" <u.kleine-koenig@pengutronix.de> To: "Clément Péron" <peron.clem@gmail.com> Cc: Mark Rutland <mark.rutland@arm.com>, linux-pwm@vger.kernel.org, Jernej Skrabec <jernej.skrabec@siol.net>, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Maxime Ripard <mripard@kernel.org>, Rob Herring <robh+dt@kernel.org>, Chen-Yu Tsai <wens@csie.org>, Thierry Reding <thierry.reding@gmail.com>, Philipp Zabel <p.zabel@pengutronix.de>, linux-arm-kernel@lists.infradead.org Subject: Re: [PATCH v2 2/7] pwm: sun4i: Add an optional probe for reset line Date: Mon, 4 Nov 2019 09:11:57 +0100 [thread overview] Message-ID: <20191104081157.373v22atswsaktbe@pengutronix.de> (raw) In-Reply-To: <20191103203334.10539-3-peron.clem@gmail.com> Hello, adding Philipp Zabel (= reset controller maintainer) to Cc: and so I'm not stripping the uncommented parts of the patch. On Sun, Nov 03, 2019 at 09:33:29PM +0100, Clément Péron wrote: > From: Jernej Skrabec <jernej.skrabec@siol.net> > > H6 PWM core needs deasserted reset line in order to work. > > Add an optional probe for it. > > Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net> > Signed-off-by: Clément Péron <peron.clem@gmail.com> > --- > drivers/pwm/pwm-sun4i.c | 32 ++++++++++++++++++++++++++++++-- > 1 file changed, 30 insertions(+), 2 deletions(-) > > diff --git a/drivers/pwm/pwm-sun4i.c b/drivers/pwm/pwm-sun4i.c > index 6f5840a1a82d..d194b8ebdb00 100644 > --- a/drivers/pwm/pwm-sun4i.c > +++ b/drivers/pwm/pwm-sun4i.c > @@ -16,6 +16,7 @@ > #include <linux/of_device.h> > #include <linux/platform_device.h> > #include <linux/pwm.h> > +#include <linux/reset.h> > #include <linux/slab.h> > #include <linux/spinlock.h> > #include <linux/time.h> > @@ -78,6 +79,7 @@ struct sun4i_pwm_data { > struct sun4i_pwm_chip { > struct pwm_chip chip; > struct clk *clk; > + struct reset_control *rst; > void __iomem *base; > spinlock_t ctrl_lock; > const struct sun4i_pwm_data *data; > @@ -365,6 +367,20 @@ static int sun4i_pwm_probe(struct platform_device *pdev) > if (IS_ERR(pwm->clk)) > return PTR_ERR(pwm->clk); > > + pwm->rst = devm_reset_control_get_optional(&pdev->dev, NULL); > + if (IS_ERR(pwm->rst)) { > + if (PTR_ERR(pwm->rst) == -EPROBE_DEFER) > + return PTR_ERR(pwm->rst); > + dev_info(&pdev->dev, "no reset control found\n"); I would degrade this to a dev_dbg. Otherwise this spams the log for all unaffected machines. devm_reset_control_get_optional() is defined in a section that has a comment "These inline function calls will be removed once all consumers have been moved over to the new explicit API.", so I guess you want devm_reset_control_get_optional_exclusive or even devm_reset_control_get_optional_shared here. @Philipp: maybe a check in checkpatch that warns about introduction of such new instances would be good?! > + } > + > + /* Deassert reset */ > + ret = reset_control_deassert(pwm->rst); > + if (ret) { > + dev_err(&pdev->dev, "Cannot deassert reset control\n"); > + return ret; > + } > + > pwm->chip.dev = &pdev->dev; > pwm->chip.ops = &sun4i_pwm_ops; > pwm->chip.base = -1; > @@ -377,19 +393,31 @@ static int sun4i_pwm_probe(struct platform_device *pdev) > ret = pwmchip_add(&pwm->chip); > if (ret < 0) { > dev_err(&pdev->dev, "failed to add PWM chip: %d\n", ret); > - return ret; > + goto err_pwm_add; > } > > platform_set_drvdata(pdev, pwm); > > return 0; > + > +err_pwm_add: > + reset_control_assert(pwm->rst); > + > + return ret; > } > > static int sun4i_pwm_remove(struct platform_device *pdev) > { > struct sun4i_pwm_chip *pwm = platform_get_drvdata(pdev); > + int ret; > + > + ret = pwmchip_remove(&pwm->chip); > + if (ret) > + return ret; > + > + reset_control_assert(pwm->rst); > > - return pwmchip_remove(&pwm->chip); > + return 0; > } > > static struct platform_driver sun4i_pwm_driver = { Best regards Uwe -- Pengutronix e.K. | Uwe Kleine-König | Industrial Linux Solutions | http://www.pengutronix.de/ | _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2019-11-04 8:12 UTC|newest] Thread overview: 71+ messages / expand[flat|nested] mbox.gz Atom feed top 2019-11-03 20:33 [PATCH v2 0/7] Add support for H6 PWM Clément Péron 2019-11-03 20:33 ` Clément Péron 2019-11-03 20:33 ` [PATCH v2 1/7] dt-bindings: pwm: allwinner: Add H6 PWM description Clément Péron 2019-11-03 20:33 ` Clément Péron 2019-11-04 8:03 ` Uwe Kleine-König 2019-11-04 8:03 ` Uwe Kleine-König 2019-11-04 17:49 ` Clément Péron 2019-11-04 17:49 ` Clément Péron 2019-11-05 11:11 ` Maxime Ripard 2019-11-05 11:11 ` Maxime Ripard 2019-11-05 12:34 ` Clément Péron 2019-11-05 12:34 ` Clément Péron 2019-11-05 17:32 ` Maxime Ripard 2019-11-05 17:32 ` Maxime Ripard 2019-11-06 9:25 ` Clément Péron 2019-11-06 9:25 ` Clément Péron 2019-11-03 20:33 ` [PATCH v2 2/7] pwm: sun4i: Add an optional probe for reset line Clément Péron 2019-11-03 20:33 ` Clément Péron 2019-11-04 8:11 ` Uwe Kleine-König [this message] 2019-11-04 8:11 ` Uwe Kleine-König 2019-11-04 17:50 ` Clément Péron 2019-11-04 17:50 ` Clément Péron 2019-11-05 7:01 ` Philipp Zabel 2019-11-05 7:01 ` Philipp Zabel 2019-11-05 13:03 ` Clément Péron 2019-11-05 13:03 ` Clément Péron 2019-11-03 20:33 ` [PATCH v2 3/7] pwm: sun4i: Add an optional probe for bus clock Clément Péron 2019-11-03 20:33 ` Clément Péron 2019-11-04 8:24 ` Uwe Kleine-König 2019-11-04 8:24 ` Uwe Kleine-König 2019-11-04 18:07 ` Clément Péron 2019-11-04 18:07 ` Clément Péron 2019-11-04 20:10 ` Uwe Kleine-König 2019-11-04 20:10 ` Uwe Kleine-König 2019-11-04 20:10 ` Uwe Kleine-König 2019-11-04 20:19 ` Jernej Škrabec 2019-11-04 20:19 ` Jernej Škrabec 2019-11-04 20:27 ` Clément Péron 2019-11-04 20:27 ` Clément Péron 2019-11-04 20:38 ` Jernej Škrabec 2019-11-04 20:38 ` Jernej Škrabec 2019-11-03 20:33 ` [PATCH v2 4/7] pwm: sun4i: Add support to output source clock directly Clément Péron 2019-11-03 20:33 ` Clément Péron 2019-11-03 22:30 ` kbuild test robot 2019-11-03 22:30 ` kbuild test robot 2019-11-03 22:30 ` kbuild test robot 2019-11-03 22:30 ` kbuild test robot 2019-11-03 22:41 ` Clément Péron 2019-11-03 22:41 ` Clément Péron 2019-11-03 22:58 ` kbuild test robot 2019-11-03 22:58 ` kbuild test robot 2019-11-03 22:58 ` kbuild test robot 2019-11-03 22:58 ` kbuild test robot 2019-11-04 8:38 ` Uwe Kleine-König 2019-11-04 8:38 ` Uwe Kleine-König 2019-11-04 21:28 ` Clément Péron 2019-11-04 21:28 ` Clément Péron 2019-11-05 7:29 ` Uwe Kleine-König 2019-11-05 7:29 ` Uwe Kleine-König 2019-11-05 12:58 ` Clément Péron 2019-11-05 12:58 ` Clément Péron 2019-11-05 13:12 ` Uwe Kleine-König 2019-11-05 13:12 ` Uwe Kleine-König 2019-11-05 13:12 ` Clément Péron 2019-11-05 13:12 ` Clément Péron 2019-11-03 20:33 ` [PATCH v2 5/7] pwm: sun4i: Add support for H6 PWM Clément Péron 2019-11-03 20:33 ` Clément Péron 2019-11-03 20:33 ` [PATCH v2 6/7] arm64: dts: allwinner: h6: Add PWM node Clément Péron 2019-11-03 20:33 ` Clément Péron 2019-11-03 20:33 ` [PATCH v2 7/7] [DO NOT MERGE] arm64: allwinner: h6: enable Beelink GS1 PWM Clément Péron 2019-11-03 20:33 ` Clément Péron
Reply instructions: You may reply publicly to this message via plain-text email using any one of the following methods: * Save the following mbox file, import it into your mail client, and reply-to-all from there: mbox Avoid top-posting and favor interleaved quoting: https://en.wikipedia.org/wiki/Posting_style#Interleaved_style * Reply using the --to, --cc, and --in-reply-to switches of git-send-email(1): git send-email \ --in-reply-to=20191104081157.373v22atswsaktbe@pengutronix.de \ --to=u.kleine-koenig@pengutronix.de \ --cc=devicetree@vger.kernel.org \ --cc=jernej.skrabec@siol.net \ --cc=linux-arm-kernel@lists.infradead.org \ --cc=linux-kernel@vger.kernel.org \ --cc=linux-pwm@vger.kernel.org \ --cc=mark.rutland@arm.com \ --cc=mripard@kernel.org \ --cc=p.zabel@pengutronix.de \ --cc=peron.clem@gmail.com \ --cc=robh+dt@kernel.org \ --cc=thierry.reding@gmail.com \ --cc=wens@csie.org \ /path/to/YOUR_REPLY https://kernel.org/pub/software/scm/git/docs/git-send-email.html * If your mail client supports setting the In-Reply-To header via mailto: links, try the mailto: linkBe sure your reply has a Subject: header at the top and a blank line before the message body.
This is an external index of several public inboxes, see mirroring instructions on how to clone and mirror all data and code used by this external index.