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received-spf: None (protection.outlook.com: microchip.com does not designate permitted sender hosts) x-microsoft-antispam-message-info: myHa1s9xEVntpSOwCgLdLPT0XAJux7WVRUQyZGcEFOZeh0efFhQuLz5yokiIM7J76Rc0ejMogSn7XLX0qZ5xz6ESXavGDDvze4oGisqjiApB+ANVlvint598QUePAv+FvoGIWNyBB2hyGtuS6jWFiLmqUPLNIzuEDRKsCwtM0kkuXNpBO7fOjcsSHYu0TroNkTAHb5KPjft2Qv/ZQCZdi6eMLD1fwc01/FzwvZvZ7DrrhxQ/Vn62+WIqfhIrRpZf+0h52Toy8SUYGMZQSGoZz82PcIBQY2kKOjqFsZOhikwZH8YcEZJo06KelRAWPnPq spamdiagnosticoutput: 1:99 spamdiagnosticmetadata: NSPM Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-MS-Exchange-CrossTenant-Network-Message-Id: 1b2f6cb0-dd9f-4590-a71a-08d664286c2f X-MS-Exchange-CrossTenant-originalarrivaltime: 17 Dec 2018 14:03:29.9148 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 3f4057f3-b418-4d4e-ba84-d55b4e897d88 X-MS-Exchange-Transport-CrossTenantHeadersStamped: BY2PR11MB0646 X-OriginatorOrg: microchip.com Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Claudiu Beznea Add documentation for PWM push-pull mode. Signed-off-by: Claudiu Beznea --- Hi Rob, = =20 = =20 In prevous version I had your Reviewed-by tag on this patch but I removed i= t =20 in this version since there are some changes b/w the previous one and this = =20 one. Please see bellow and let me know if you are ok with this. = =20 Thank you, Claudiu Beznea Changes in v6: - remove bindings part - use 1/3 duty factor ratio - use '^' symbols to emphasize the beginning of a new period - use PWMx_y to refrer to output y of PWM x 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 wi= ll then be available: PWMx_1 |__| |__| |__| |__| ^ ^ ^ ^ =20 + Push-pull mode - for PWM channels with two outputs; output waveforms + for a PWM channel in push-pull mode, with normal polarity looks li= ke + this: + __ __ + PWMx_0 __| |____________| |__________ + __ __ + PWMx_1 __________| |____________| |__ + ^ ^ ^ ^ + + If polarity is inversed: + __ ____________ __________ + PWMx_0 |__| |__| + __________ ____________ __ + PWMx_1 |__| |__| + ^ ^ ^ ^ + Where '^' specifies the beginning of a period. =20 Implementing a PWM driver --=20 2.7.4