From: Thierry Reding <thierry.reding@gmail.com>
To: Paul Cercueil <paul@crapouillou.net>
Cc: "Daniel Lezcano" <daniel.lezcano@linaro.org>,
"Thomas Gleixner" <tglx@linutronix.de>,
"Ralf Baechle" <ralf@linux-mips.org>,
"Paul Burton" <paul.burton@mips.com>,
"James Hogan" <jhogan@kernel.org>,
"Jonathan Corbet" <corbet@lwn.net>,
"Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>,
"Mathieu Malaterre" <malat@debian.org>,
od@zcrc.me, linux-pwm@vger.kernel.org,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-watchdog@vger.kernel.org, linux-mips@vger.kernel.org,
linux-doc@vger.kernel.org, linux-clk@vger.kernel.org
Subject: Re: [PATCH v10 15/27] pwm: jz4740: Allow selection of PWM channels 0 and 1
Date: Mon, 4 Mar 2019 13:34:56 +0100 [thread overview]
Message-ID: <20190304123456.GG9040@ulmo> (raw)
In-Reply-To: <20190302233413.14813-16-paul@crapouillou.net>
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On Sat, Mar 02, 2019 at 08:34:01PM -0300, Paul Cercueil wrote:
> The TCU channels 0 and 1 were previously reserved for system tasks, and
> thus unavailable for PWM.
>
> Signed-off-by: Paul Cercueil <paul@crapouillou.net>
> Tested-by: Mathieu Malaterre <malat@debian.org>
> Tested-by: Artur Rojek <contact@artur-rojek.eu>
> ---
>
> Notes:
> v6: New patch
>
> v7: No change
>
> v8: ingenic_tcu_[request,release]_channel are dropped. We now use
> the memory resources provided to the driver to detect whether
> or not we are allowed to use the TCU channel.
>
> v9: Drop previous system. Call a API function provided by the
> clocksource driver to know if we can use the channel as PWM.
>
> v10: No change
>
> drivers/pwm/pwm-jz4740.c | 6 +-----
> 1 file changed, 1 insertion(+), 5 deletions(-)
>
> diff --git a/drivers/pwm/pwm-jz4740.c b/drivers/pwm/pwm-jz4740.c
> index f497388fc818..c914589d547b 100644
> --- a/drivers/pwm/pwm-jz4740.c
> +++ b/drivers/pwm/pwm-jz4740.c
> @@ -44,11 +44,7 @@ static int jz4740_pwm_request(struct pwm_chip *chip, struct pwm_device *pwm)
> char clk_name[16];
> int ret;
>
> - /*
> - * Timers 0 and 1 are used for system tasks, so they are unavailable
> - * for use as PWMs.
> - */
> - if (pwm->hwpwm < 2)
> + if (!ingenic_tcu_pwm_can_use_chn(pwm->hwpwm))
> return -EBUSY;
Like I said earlier, I think this would be nicer to take a parameter to
a struct device * to remove the need for a global variable (at least for
this particular case).
Thierry
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next prev parent reply other threads:[~2019-03-04 12:35 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-02 23:33 [5.2][PATCH v10 00/27] Ingenic TCU patchset Paul Cercueil
2019-03-02 23:33 ` [PATCH v10 01/27] dt-bindings: ingenic: Add DT bindings for TCU clocks Paul Cercueil
2019-03-02 23:33 ` [PATCH v10 02/27] doc: Add doc for the Ingenic TCU hardware Paul Cercueil
2019-03-02 23:33 ` [PATCH v10 03/27] dt-bindings: Add doc for the Ingenic TCU drivers Paul Cercueil
2019-03-02 23:33 ` [PATCH v10 04/27] clocksource: Add a new timer-ingenic driver Paul Cercueil
2019-03-04 12:22 ` Thierry Reding
2019-03-04 18:13 ` Paul Cercueil
2019-03-08 10:22 ` Thierry Reding
2019-03-11 20:52 ` Paul Cercueil
2019-03-05 3:15 ` kbuild test robot
2019-03-02 23:33 ` [PATCH v10 05/27] clocksource: Add driver for the Ingenic JZ47xx OST Paul Cercueil
2019-03-02 23:33 ` [PATCH v10 06/27] MAINTAINERS: Add myself as maintainer for Ingenic TCU drivers Paul Cercueil
2019-03-02 23:33 ` [PATCH v10 07/27] watchdog: jz4740: Use WDT clock provided by TCU driver Paul Cercueil
2019-03-02 23:33 ` [PATCH v10 08/27] watchdog: jz4740: Use regmap " Paul Cercueil
2019-03-02 23:33 ` [PATCH v10 09/27] watchdog: jz4740: Avoid starting watchdog in set_timeout Paul Cercueil
2019-03-02 23:33 ` [PATCH v10 10/27] watchdog: jz4740: Drop dependency on MACH_JZ47xx, use COMPILE_TEST Paul Cercueil
2019-03-02 23:33 ` [PATCH v10 11/27] pwm: jz4740: Apply configuration atomically Paul Cercueil
2019-03-04 11:59 ` Thierry Reding
2019-03-02 23:33 ` [PATCH v10 12/27] pwm: jz4740: Use regmap from TCU driver Paul Cercueil
2019-03-04 12:24 ` Thierry Reding
2019-03-02 23:33 ` [PATCH v10 13/27] pwm: jz4740: Use clocks " Paul Cercueil
2019-03-04 12:30 ` Thierry Reding
2019-03-04 18:18 ` Paul Cercueil
2019-03-02 23:34 ` [PATCH v10 14/27] pwm: jz4740: Improve algorithm of clock calculation Paul Cercueil
2019-03-04 12:33 ` Thierry Reding
2019-03-02 23:34 ` [PATCH v10 15/27] pwm: jz4740: Allow selection of PWM channels 0 and 1 Paul Cercueil
2019-03-04 12:34 ` Thierry Reding [this message]
2019-03-02 23:34 ` [PATCH v10 16/27] pwm: jz4740: Drop dependency on MACH_INGENIC, use COMPILE_TEST Paul Cercueil
2019-03-02 23:34 ` [PATCH v10 17/27] pwm: jz4740: Remove unused devicetree compatible strings Paul Cercueil
2019-03-02 23:34 ` [PATCH v10 18/27] clk: jz4740: Add TCU clock Paul Cercueil
2019-03-02 23:34 ` [PATCH v10 19/27] MIPS: Kconfig: Select TCU timer driver when MACH_INGENIC is set Paul Cercueil
2019-03-02 23:34 ` [PATCH v10 20/27] MIPS: jz4740: Add DTS nodes for the TCU drivers Paul Cercueil
2019-03-02 23:34 ` [PATCH v10 21/27] MIPS: qi_lb60: Move PWM devices to devicetree Paul Cercueil
2019-03-02 23:34 ` [PATCH v10 22/27] MIPS: qi_lb60: Reduce system timer and clocksource to 750 kHz Paul Cercueil
2019-03-02 23:34 ` [PATCH v10 23/27] MIPS: CI20: Reduce system timer and clocksource to 3 MHz Paul Cercueil
2019-03-02 23:34 ` [PATCH v10 24/27] MIPS: CI20: defconfig: enable OST driver Paul Cercueil
2019-03-02 23:34 ` [PATCH v10 25/27] MIPS: GCW0: Reduce system timer and clocksource to 750 kHz Paul Cercueil
2019-03-02 23:34 ` [PATCH v10 26/27] MIPS: GCW0: defconfig: Enable OST, watchdog, PWM drivers Paul Cercueil
2019-03-02 23:34 ` [PATCH v10 27/27] MIPS: jz4740: Drop obsolete code Paul Cercueil
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