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path: root/drivers/pwm/pwm-atmel-hlcdc.c
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2017-04-06pwm: atmel-hlcdc: Implement the suspend/resume hooksBoris Brezillon1-0/+35
Implement the suspend/resume hooks to make sure the PWM device is restored to a correct state after a suspend. Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2017-04-06pwm: atmel-hlcdc: Convert to the atomic PWM APIBoris Brezillon1-126/+101
Implement the ->apply() hook and drop the ->enable(), ->disable, ->set_polarity and ->config() ones. Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com> Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2017-01-04pwm: Remove .can_sleep from struct pwm_chipThierry Reding1-1/+0
All PWM devices have been marked as "might sleep" since v4.5, there is no longer a need to differentiate on a per-chip basis. Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2016-06-14pwm: atmel-hlcdc: Fix default PWM polarityBoris Brezillon1-1/+1
The PWM device exposed by the HLCDC IP is configured with an inverted polarity by default. Registering the PWM chip with the normal polarity was not a problem before commit 42e8992c58d4 ("pwm: Add core infrastructure to allow atomic updates") because the ->set_polarity() hook was called no matter the current polarity state, but this is no longer the case. Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2015-10-06pwm: atmel-hlcdc: add sama5d2 SoC support.Nicolas Ferre1-0/+3
Add sama5d2 hlcdc backlight PWM support. This chip doesn't have to deal with an errata, so it's a simple addition of the mfd compatible string. Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2015-09-21pwm: atmel-hlcdc: Fix module autoload for OF platform driverLuis de Bethencourt1-0/+1
This platform driver has a OF device ID table but the OF module alias information is not created so module autoloading won't work. This patch adds the missing MODULE_DEVICE_TABLE() for OF to export that information so modules have the correct aliases built-in and autoloading works correctly. A longer explanation by Javier Canillas can be found here: https://lkml.org/lkml/2015/7/30/519 Signed-off-by: Luis de Bethencourt <luisbg@osg.samsung.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2015-09-09ARM: at91: pwm: atmel-hlcdc: Add at91sam9n12 errataJosh Wu1-0/+5
The errata for HLCDC PWM of at91sam9n12 are the same as for at91sam9x5. Signed-off-by: Josh Wu <josh.wu@atmel.com> Acked-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2015-03-11pwm: atmel-hlcdc: Add errata handling for sama5d4Nicolas Ferre1-0/+4
sama5d4 SoC also has an errata on the HLCDC PWM. It is the same as the sama5d3 that is forbidding the use of div1 prescaler. Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com> Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2015-01-30pwm: atmel-hlcdc: Prevent division by zeroBoris BREZILLON1-0/+6
The slow and system clock should never return a rate of zero, but this might happen if the clocks property defined in the DT is referencing the wrong clocks. Prevent any division by zero from happening by testing the clk_freq value before calling do_div(). Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2014-12-04pwm: atmel-hlcdc: add at91sam9x5 and sama5d3 errata handlingBoris BREZILLON1-5/+45
at91sam9x5 has an errata forbidding the use of slow clk as a clk source and sama5d3 SoCs has another errata forbidding the use of div1 prescaler. Take both of these erratas into account. Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com> Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2014-11-17pwm: add support for atmel-hlcdc-pwm deviceBoris Brezillon1-0/+259
The HLCDC IP available in some Atmel SoCs (i.e. at91sam9x5, at91sam9n12 or sama5d3 families for instance) provides a PWM device. This driver add support for a PWM chip exposing a single PWM device (which will most likely be used to drive a backlight device). Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com> Tested-by: Anthony Harivel <anthony.harivel@emtrion.de> Tested-by: Ludovic Desroches <ludovic.desroches@atmel.com> Acked-by: Thierry Reding <thierry.reding@gmail.com> Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>