From: Neil Armstrong <narmstrong@baylibre.com>
To: Martin Blumenstingl <martin.blumenstingl@googlemail.com>,
linux-amlogic@lists.infradead.org, linux-pwm@vger.kernel.org,
thierry.reding@gmail.com, u.kleine-koenig@pengutronix.de
Cc: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH 02/14] pwm: meson: use devm_clk_get_optional() to get the input clock
Date: Mon, 27 May 2019 14:25:25 +0200 [thread overview]
Message-ID: <b4cfc101-7391-aef2-0f6c-8bdec2044101@baylibre.com> (raw)
In-Reply-To: <20190525181133.4875-3-martin.blumenstingl@googlemail.com>
On 25/05/2019 20:11, Martin Blumenstingl wrote:
> Simplify the code which fetches the input clock for a PWM channel by
> using devm_clk_get_optional().
> This comes with a small functional change: previously all errors except
> EPROBE_DEFER were ignored. Now all other errors are also treated as
> errors. If no input clock is present devm_clk_get_optional() will return
> NULL instead of an error which matches the behavior of the old code.
>
> Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
> ---
> drivers/pwm/pwm-meson.c | 11 +++--------
> 1 file changed, 3 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/pwm/pwm-meson.c b/drivers/pwm/pwm-meson.c
> index 3fbbc4128ce8..35b38c7201c3 100644
> --- a/drivers/pwm/pwm-meson.c
> +++ b/drivers/pwm/pwm-meson.c
> @@ -474,14 +474,9 @@ static int meson_pwm_init_channels(struct meson_pwm *meson,
>
> snprintf(name, sizeof(name), "clkin%u", i);
>
> - channel->clk_parent = devm_clk_get(dev, name);
> - if (IS_ERR(channel->clk_parent)) {
> - err = PTR_ERR(channel->clk_parent);
> - if (err == -EPROBE_DEFER)
> - return err;
> -
> - channel->clk_parent = NULL;
> - }
> + channel->clk_parent = devm_clk_get_optional(dev, name);
> + if (IS_ERR(channel->clk_parent))
> + return PTR_ERR(channel->clk_parent);
> }
>
> return 0;
>
Reviewed-by: Neil Armstrong <narmstrong@baylibre.com>
WARNING: multiple messages have this Message-ID (diff)
From: Neil Armstrong <narmstrong@baylibre.com>
To: Martin Blumenstingl <martin.blumenstingl@googlemail.com>,
linux-amlogic@lists.infradead.org, linux-pwm@vger.kernel.org,
thierry.reding@gmail.com, u.kleine-koenig@pengutronix.de
Cc: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH 02/14] pwm: meson: use devm_clk_get_optional() to get the input clock
Date: Mon, 27 May 2019 14:25:25 +0200 [thread overview]
Message-ID: <b4cfc101-7391-aef2-0f6c-8bdec2044101@baylibre.com> (raw)
In-Reply-To: <20190525181133.4875-3-martin.blumenstingl@googlemail.com>
On 25/05/2019 20:11, Martin Blumenstingl wrote:
> Simplify the code which fetches the input clock for a PWM channel by
> using devm_clk_get_optional().
> This comes with a small functional change: previously all errors except
> EPROBE_DEFER were ignored. Now all other errors are also treated as
> errors. If no input clock is present devm_clk_get_optional() will return
> NULL instead of an error which matches the behavior of the old code.
>
> Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
> ---
> drivers/pwm/pwm-meson.c | 11 +++--------
> 1 file changed, 3 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/pwm/pwm-meson.c b/drivers/pwm/pwm-meson.c
> index 3fbbc4128ce8..35b38c7201c3 100644
> --- a/drivers/pwm/pwm-meson.c
> +++ b/drivers/pwm/pwm-meson.c
> @@ -474,14 +474,9 @@ static int meson_pwm_init_channels(struct meson_pwm *meson,
>
> snprintf(name, sizeof(name), "clkin%u", i);
>
> - channel->clk_parent = devm_clk_get(dev, name);
> - if (IS_ERR(channel->clk_parent)) {
> - err = PTR_ERR(channel->clk_parent);
> - if (err == -EPROBE_DEFER)
> - return err;
> -
> - channel->clk_parent = NULL;
> - }
> + channel->clk_parent = devm_clk_get_optional(dev, name);
> + if (IS_ERR(channel->clk_parent))
> + return PTR_ERR(channel->clk_parent);
> }
>
> return 0;
>
Reviewed-by: Neil Armstrong <narmstrong@baylibre.com>
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
WARNING: multiple messages have this Message-ID (diff)
From: Neil Armstrong <narmstrong@baylibre.com>
To: Martin Blumenstingl <martin.blumenstingl@googlemail.com>,
linux-amlogic@lists.infradead.org, linux-pwm@vger.kernel.org,
thierry.reding@gmail.com, u.kleine-koenig@pengutronix.de
Cc: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH 02/14] pwm: meson: use devm_clk_get_optional() to get the input clock
Date: Mon, 27 May 2019 14:25:25 +0200 [thread overview]
Message-ID: <b4cfc101-7391-aef2-0f6c-8bdec2044101@baylibre.com> (raw)
In-Reply-To: <20190525181133.4875-3-martin.blumenstingl@googlemail.com>
On 25/05/2019 20:11, Martin Blumenstingl wrote:
> Simplify the code which fetches the input clock for a PWM channel by
> using devm_clk_get_optional().
> This comes with a small functional change: previously all errors except
> EPROBE_DEFER were ignored. Now all other errors are also treated as
> errors. If no input clock is present devm_clk_get_optional() will return
> NULL instead of an error which matches the behavior of the old code.
>
> Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
> ---
> drivers/pwm/pwm-meson.c | 11 +++--------
> 1 file changed, 3 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/pwm/pwm-meson.c b/drivers/pwm/pwm-meson.c
> index 3fbbc4128ce8..35b38c7201c3 100644
> --- a/drivers/pwm/pwm-meson.c
> +++ b/drivers/pwm/pwm-meson.c
> @@ -474,14 +474,9 @@ static int meson_pwm_init_channels(struct meson_pwm *meson,
>
> snprintf(name, sizeof(name), "clkin%u", i);
>
> - channel->clk_parent = devm_clk_get(dev, name);
> - if (IS_ERR(channel->clk_parent)) {
> - err = PTR_ERR(channel->clk_parent);
> - if (err == -EPROBE_DEFER)
> - return err;
> -
> - channel->clk_parent = NULL;
> - }
> + channel->clk_parent = devm_clk_get_optional(dev, name);
> + if (IS_ERR(channel->clk_parent))
> + return PTR_ERR(channel->clk_parent);
> }
>
> return 0;
>
Reviewed-by: Neil Armstrong <narmstrong@baylibre.com>
_______________________________________________
linux-amlogic mailing list
linux-amlogic@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-amlogic
next prev parent reply other threads:[~2019-05-27 12:25 UTC|newest]
Thread overview: 112+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-25 18:11 [PATCH 00/14] pwm-meson: cleanups and improvements Martin Blumenstingl
2019-05-25 18:11 ` Martin Blumenstingl
2019-05-25 18:11 ` Martin Blumenstingl
2019-05-25 18:11 ` [PATCH 01/14] pwm: meson: unify the parameter list of meson_pwm_{enable,disable} Martin Blumenstingl
2019-05-25 18:11 ` [PATCH 01/14] pwm: meson: unify the parameter list of meson_pwm_{enable, disable} Martin Blumenstingl
2019-05-25 18:11 ` Martin Blumenstingl
2019-05-27 12:25 ` Neil Armstrong
2019-05-27 12:25 ` Neil Armstrong
2019-05-27 12:25 ` Neil Armstrong
2019-05-25 18:11 ` [PATCH 02/14] pwm: meson: use devm_clk_get_optional() to get the input clock Martin Blumenstingl
2019-05-25 18:11 ` Martin Blumenstingl
2019-05-25 18:11 ` Martin Blumenstingl
2019-05-27 12:25 ` Neil Armstrong [this message]
2019-05-27 12:25 ` Neil Armstrong
2019-05-27 12:25 ` Neil Armstrong
2019-05-25 18:11 ` [PATCH 03/14] pwm: meson: use GENMASK and FIELD_PREP for the lo and hi values Martin Blumenstingl
2019-05-25 18:11 ` Martin Blumenstingl
2019-05-25 18:11 ` Martin Blumenstingl
2019-05-27 12:25 ` Neil Armstrong
2019-05-27 12:25 ` Neil Armstrong
2019-05-27 12:25 ` Neil Armstrong
2019-05-25 18:11 ` [PATCH 04/14] pwm: meson: change MISC_CLK_SEL_WIDTH to MISC_CLK_SEL_MASK Martin Blumenstingl
2019-05-25 18:11 ` Martin Blumenstingl
2019-05-25 18:11 ` Martin Blumenstingl
2019-05-27 12:26 ` Neil Armstrong
2019-05-27 12:26 ` Neil Armstrong
2019-05-27 12:26 ` Neil Armstrong
2019-05-27 17:46 ` Martin Blumenstingl
2019-05-27 17:46 ` Martin Blumenstingl
2019-05-27 17:46 ` Martin Blumenstingl
2019-05-27 18:00 ` Uwe Kleine-König
2019-05-27 18:00 ` Uwe Kleine-König
2019-05-27 18:00 ` Uwe Kleine-König
2019-05-28 18:04 ` Martin Blumenstingl
2019-05-28 18:04 ` Martin Blumenstingl
2019-05-28 18:04 ` Martin Blumenstingl
2019-05-25 18:11 ` [PATCH 05/14] pwm: meson: don't duplicate the polarity internally Martin Blumenstingl
2019-05-25 18:11 ` Martin Blumenstingl
2019-05-25 18:11 ` Martin Blumenstingl
2019-05-27 12:26 ` Neil Armstrong
2019-05-27 12:26 ` Neil Armstrong
2019-05-27 12:26 ` Neil Armstrong
2019-05-25 18:11 ` [PATCH 06/14] pwm: meson: pass struct pwm_device to meson_pwm_calc() Martin Blumenstingl
2019-05-25 18:11 ` Martin Blumenstingl
2019-05-25 18:11 ` Martin Blumenstingl
2019-05-27 12:27 ` Neil Armstrong
2019-05-27 12:27 ` Neil Armstrong
2019-05-27 12:27 ` Neil Armstrong
2019-05-25 18:11 ` [PATCH 07/14] pwm: meson: add the meson_pwm_channel data to struct meson_pwm Martin Blumenstingl
2019-05-25 18:11 ` Martin Blumenstingl
2019-05-25 18:11 ` Martin Blumenstingl
2019-05-27 12:27 ` Neil Armstrong
2019-05-27 12:27 ` Neil Armstrong
2019-05-27 12:27 ` Neil Armstrong
2019-05-27 17:52 ` Martin Blumenstingl
2019-05-27 17:52 ` Martin Blumenstingl
2019-05-27 17:52 ` Martin Blumenstingl
2019-05-25 18:11 ` [PATCH 08/14] pwm: meson: add the per-channel register offsets and bits in a struct Martin Blumenstingl
2019-05-25 18:11 ` Martin Blumenstingl
2019-05-25 18:11 ` Martin Blumenstingl
2019-05-27 12:28 ` Neil Armstrong
2019-05-27 12:28 ` Neil Armstrong
2019-05-27 12:28 ` Neil Armstrong
2019-05-27 17:57 ` Martin Blumenstingl
2019-05-27 17:57 ` Martin Blumenstingl
2019-05-27 17:57 ` Martin Blumenstingl
2019-05-28 8:11 ` Neil Armstrong
2019-05-28 8:11 ` Neil Armstrong
2019-05-28 8:11 ` Neil Armstrong
2019-05-25 18:11 ` [PATCH 09/14] pwm: meson: move pwm_set_chip_data() to meson_pwm_request() Martin Blumenstingl
2019-05-25 18:11 ` Martin Blumenstingl
2019-05-25 18:11 ` Martin Blumenstingl
2019-05-27 12:30 ` Neil Armstrong
2019-05-27 12:30 ` Neil Armstrong
2019-05-27 12:30 ` Neil Armstrong
2019-05-25 18:11 ` [PATCH 10/14] pwm: meson: simplify the calculation of the pre-divider and count Martin Blumenstingl
2019-05-25 18:11 ` Martin Blumenstingl
2019-05-25 18:11 ` Martin Blumenstingl
2019-05-26 19:41 ` Uwe Kleine-König
2019-05-26 19:41 ` Uwe Kleine-König
2019-05-26 19:41 ` Uwe Kleine-König
2019-05-26 19:41 ` Uwe Kleine-König
2019-05-27 12:37 ` Neil Armstrong
2019-05-27 12:37 ` Neil Armstrong
2019-05-27 12:37 ` Neil Armstrong
2019-05-25 18:11 ` [PATCH 11/14] pwm: meson: read the full hardware state in meson_pwm_get_state() Martin Blumenstingl
2019-05-25 18:11 ` Martin Blumenstingl
2019-05-25 18:11 ` Martin Blumenstingl
2019-05-27 12:31 ` Neil Armstrong
2019-05-27 12:31 ` Neil Armstrong
2019-05-27 12:31 ` Neil Armstrong
2019-05-25 18:11 ` [PATCH 12/14] pwm: meson: don't cache struct pwm_state internally Martin Blumenstingl
2019-05-25 18:11 ` Martin Blumenstingl
2019-05-25 18:11 ` Martin Blumenstingl
2019-05-27 12:31 ` Neil Armstrong
2019-05-27 12:31 ` Neil Armstrong
2019-05-27 12:31 ` Neil Armstrong
2019-05-25 18:11 ` [PATCH 13/14] pwm: meson: add support PWM_POLARITY_INVERSED when disabling Martin Blumenstingl
2019-05-25 18:11 ` Martin Blumenstingl
2019-05-25 18:11 ` Martin Blumenstingl
2019-05-27 12:33 ` Neil Armstrong
2019-05-27 12:33 ` Neil Armstrong
2019-05-27 12:33 ` Neil Armstrong
2019-05-27 17:50 ` Martin Blumenstingl
2019-05-27 17:50 ` Martin Blumenstingl
2019-05-27 17:50 ` Martin Blumenstingl
2019-05-25 18:11 ` [PATCH 14/14] pwm: meson: add documentation to the driver Martin Blumenstingl
2019-05-25 18:11 ` Martin Blumenstingl
2019-05-25 18:11 ` Martin Blumenstingl
2019-05-27 12:33 ` Neil Armstrong
2019-05-27 12:33 ` Neil Armstrong
2019-05-27 12:33 ` Neil Armstrong
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