From: Rajkumar Rampelli <rrajk@nvidia.com>
To: <robh+dt@kernel.org>, <mark.rutland@arm.com>,
<thierry.reding@gmail.com>, <jonathanh@nvidia.com>,
<jdelvare@suse.com>, <linux@roeck-us.net>, <corbet@lwn.net>,
<catalin.marinas@arm.com>, <will.deacon@arm.com>,
<kstewart@linuxfoundation.org>, <gregkh@linuxfoundation.org>,
<pombredanne@nexb.com>, <mmaddireddy@nvidia.com>,
<mperttunen@nvidia.com>, <arnd@arndb.de>,
<gregory.clement@free-electrons.com>, <timur@codeaurora.org>,
<andy.gross@linaro.org>, <xuwei5@hisilicon.com>,
<elder@linaro.org>, <heiko@sntech.de>, <krzk@kernel.org>,
<ard.biesheuvel@linaro.org>
Cc: <devicetree@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
<linux-pwm@vger.kernel.org>, <linux-tegra@vger.kernel.org>,
<linux-hwmon@vger.kernel.org>, <linux-doc@vger.kernel.org>,
<linux-arm-kernel@lists.infradead.org>, <ldewangan@nvidia.com>,
<rrajk@nvidia.com>
Subject: [PATCH 01/10] pwm: core: Add support for PWM HW driver with pwm capture only
Date: Wed, 21 Feb 2018 12:28:50 +0530 [thread overview]
Message-ID: <1519196339-9377-2-git-send-email-rrajk@nvidia.com> (raw)
In-Reply-To: <1519196339-9377-1-git-send-email-rrajk@nvidia.com>
Add support for pwm HW driver which has only capture functionality.
This helps to implement the PWM based Tachometer driver which reads
the PWM output signals from electronic fans.
PWM Tachometer captures the period and duty cycle of the PWM signal
Signed-off-by: Rajkumar Rampelli <rrajk@nvidia.com>
---
drivers/pwm/core.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/pwm/core.c b/drivers/pwm/core.c
index 1581f6a..87d14c9 100644
--- a/drivers/pwm/core.c
+++ b/drivers/pwm/core.c
@@ -246,6 +246,10 @@ static bool pwm_ops_check(const struct pwm_ops *ops)
if (ops->apply)
return true;
+ /* driver supports capture operation */
+ if (ops->capture)
+ return true;
+
return false;
}
--
2.1.4
next prev parent reply other threads:[~2018-02-21 6:58 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-02-21 6:58 [PATCH 00/10] Implementation of Tegra Tachometer driver Rajkumar Rampelli
2018-02-21 6:58 ` Rajkumar Rampelli [this message]
2018-02-21 6:58 ` [PATCH 02/10] dt-bindings: Tegra186 tachometer device tree bindings Rajkumar Rampelli
2018-02-21 6:58 ` [PATCH 03/10] pwm: tegra: Add PWM based Tachometer driver Rajkumar Rampelli
2018-02-21 6:58 ` [PATCH 04/10] hwmon: generic-pwm-tachometer: Add DT binding details Rajkumar Rampelli
2018-02-21 6:58 ` [PATCH 05/10] hwmon: generic-pwm-tachometer: Add generic PWM based tachometer Rajkumar Rampelli
2018-02-21 7:15 ` Mikko Perttunen
2018-02-21 14:46 ` Guenter Roeck
2018-02-21 15:20 ` Mikko Perttunen
2018-02-21 16:08 ` Guenter Roeck
2018-02-23 11:45 ` RAJKUMAR
2018-03-01 22:08 ` Rob Herring
2018-02-21 14:50 ` Guenter Roeck
2018-02-28 5:38 ` Rajkumar Rampelli
2018-02-28 5:58 ` Guenter Roeck
2018-02-28 6:07 ` Rajkumar Rampelli
2018-02-28 6:12 ` Rajkumar Rampelli
2018-02-28 7:03 ` Mikko Perttunen
2018-02-28 14:29 ` Guenter Roeck
2018-03-07 9:47 ` Rajkumar Rampelli
2018-03-07 14:20 ` Guenter Roeck
2018-03-08 6:06 ` Laxman Dewangan
2018-03-08 14:31 ` Guenter Roeck
2018-03-08 15:21 ` Laxman Dewangan
2018-03-08 7:57 ` Mikko Perttunen
2018-03-08 14:33 ` Guenter Roeck
2018-02-21 6:58 ` [PATCH 06/10] arm64: tegra: Add Tachometer Controller on Tegra186 Rajkumar Rampelli
2018-02-21 6:58 ` [PATCH 07/10] arm64: tegra: Add PWM based Tachometer support " Rajkumar Rampelli
2018-02-21 6:58 ` [PATCH 08/10] arm64: defconfig: enable Nvidia Tegra Tachometer as a module Rajkumar Rampelli
2018-02-21 6:58 ` [PATCH 09/10] arm64: defconfig: Enable Generic PWM based Tachometer driver Rajkumar Rampelli
2018-02-21 6:58 ` [PATCH 10/10] arm64: tegra: Add PWM controller on Tegra186 soc Rajkumar Rampelli
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