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X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-pwm@vger.kernel.org, Claudiu.Beznea@microchip.com, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP From: Claudiu Beznea Add documentation for PWM push-pull mode. Signed-off-by: Claudiu Beznea --- Documentation/pwm.txt | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/Documentation/pwm.txt b/Documentation/pwm.txt index 669fd4c9cc8e..80552627627d 100644 --- a/Documentation/pwm.txt +++ b/Documentation/pwm.txt @@ -130,6 +130,22 @@ channel that was exported. The following properties will then be available: PWMx_1 |__| |__| |__| |__| ^ ^ ^ ^ + Push-pull mode - for PWM channels with two outputs; output waveforms + for a PWM channel in push-pull mode, with normal polarity looks like + this: + __ __ + PWMx_0 __| |____________| |__________ + __ __ + PWMx_1 __________| |____________| |__ + ^ ^ ^ ^ + + If polarity is inversed: + __ ____________ __________ + PWMx_0 |__| |__| + __________ ____________ __ + PWMx_1 |__| |__| + ^ ^ ^ ^ + Where '^' specifies the beginning of a period. Implementing a PWM driver