- 17 Dec, 2020 40 commits
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Fabien Parent authored
The MediaTek PWM IP can sometimes use the 26 MHz source clock to generate the PWM signal, but the driver currently assumes that we always use the PWM bus clock to generate the PWM signal. This commit modifies the PWM driver in order to force the PWM IP to always use the bus clock as source clock. I do not have the datasheet of all the MediaTek SoC, so I don't know if the register to choose the source clock is present in all the SoCs or only in subset. As a consequence I made this change optional by using a platform data paremeter to says whether this register is supported or not. On all the SoCs I don't have the datasheet (MT2712, MT7622, MT7623, MT7628, MT7629) I kept the behavior to be the same as before this change. Signed-off-by:
Fabien Parent <fparent@baylibre.com> Reviewed-by:
Matthias Brugger <matthias.bgg@gmail.com> Signed-off-by:
Thierry Reding <thierry.reding@gmail.com>
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Fabien Parent authored
Add binding documentation for the MT8183 SoC. Signed-off-by:
Rob Herring <robh@kernel.org> Signed-off-by:
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Vijayakannan Ayyathurai authored
The Intel Keem Bay SoC requires PWM support. Add the pwm-keembay driver to enable this. Signed-off-by:
Lai, Poey Seng <poey.seng.lai@intel.com> Co-developed-by:
Vineetha G. Jaya Kumaran <vineetha.g.jaya.kumaran@intel.com> Signed-off-by:
Andy Shevchenko <andriy.shevchenko@linux.intel.com> Co-developed-by:
Vijayakannan Ayyathurai <vijayakannan.ayyathurai@intel.com> Signed-off-by:
Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by:
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Vijayakannan Ayyathurai authored
Add PWM Device Tree bindings documentation for the Intel Keem Bay SoC. Signed-off-by:
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Lokesh Vutla authored
When there are other PWM controllers enabled along with pwm-lp3943, pwm-lp3942 is failing to probe with -EEXIST error. This is because other PWM controllers are probed first and assigned PWM base 0 and pwm-lp3943 is requesting for 0 again. In order to avoid this, assign the chip base with -1, so that it is dynamically allocated. Fixes: af66b3c0 ("pwm: Add LP3943 PWM driver") Signed-off-by:
Lokesh Vutla <lokeshvutla@ti.com> Reviewed-by:
Uwe Kleine-König <u.kleine-könig@pengutronix.de> Signed-off-by:
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Alexandre Belloni authored
Add sama5d2 support. The sama5d2 has a new clock input, its gclk. Index 0 of the clock selector is the gclk instead of the peripheral clock divided by 2. For now, the gclk is not used because the peripheral clock divided by 8 already gives a 9.6ns resolution which is enough for most use cases. Signed-off-by:
Alexandre Belloni <alexandre.belloni@bootlin.com> Signed-off-by:
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Alexandre Belloni authored
The PWM is now a subnode of the used TCB. This is cleaner and it mainly allows to stop wasting TCB channels when only 2 or 4 PWMs are used. This also removes the atmel_tclib dependency Cc: Thierry Reding <thierry.reding@gmail.com> Cc: linux-pwm@vger.kernel.org Signed-off-by:
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Alexandre Belloni authored
Move the TCB pwm nodes under their parent. This removes the need for the tc-block property as there is now a child-parent relationship between the TC channel and the TC block. Move the documentation to the main file. Signed-off-by:
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Grygorii Strashko authored
The devm_clk_get() may return -EPROBE_DEFER which is not handled properly by TI EHRPWM driver and causes unnecessary boot log messages. Hence, add proper deferred probe handling with new dev_err_probe() API. Signed-off-by:
Grygorii Strashko <grygorii.strashko@ti.com> Reviewed-by:
Vignesh Raghavendra <vigneshr@ti.com> Reviewed-by:
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Hans de Goede authored
As the comment above the code setting the DPM_FLAG_NO_DIRECT_COMPLETE flag explains: /* * On Cherry Trail devices the GFX0._PS0 AML checks if the controller * is on and if it is not on it turns it on and restores what it * believes is the correct state to the PWM controller. * Because of this we must disallow direct-complete, which keeps the * controller (runtime)suspended, on resume to avoid 2 issues: * 1. The controller getting turned on without the linux-pm code * knowing about this. On devices where the controller is unused * this causes it to stay on during the next suspend causing high * battery drain (because S0i3 is not reached) * 2. The state restoring code unexpectedly messing with the controller */ The pm-core must not skip resume to avoid the GFX0._PS0 AML code messing with the PWM controller behind our back. But leaving the controller runtime-suspended (skipping runtime-resume + normal-suspend) during suspend is fine. Set the DPM_FLAG_SMART_SUSPEND flag to allow this. Reviewed-by:Andy Shevchenko <andy.shevchenko@gmail.com> Signed-off-by:
Hans de Goede <hdegoede@redhat.com> Signed-off-by:
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Hans de Goede authored
ACPI LPSS devices use direct-complete style suspend/resume handling by default. We set the DPM_FLAG_SMART_PREPARE and define a prepare handler to disable this on Cherry Trail devices. Clean this up a bit by setting the DPM_FLAG_NO_DIRECT_COMPLETE flag for Cherry Trail devices, instead of defining a prepare handler. While at it also improve the comment explaining why this is necessary. Reviewed-by:
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Hans de Goede authored
pwm_lpss_is_updating() does a sanity check which should never fail. If the check does actually fail that is worth logging an error, especially since this means that we will skip making the requested changes to the PWM settings. Reviewed-by:
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Uwe Kleine-König authored
The ab8500 driver is the last one which doesn't (explicitly) use dynamic allocation of the pwm id. Looking through the kernel sources I didn't find a place that relies on this id. And with the device probed from device tree pdev->id is -1 anyhow; making this explicit looks beneficial, too. Signed-off-by:
Uwe Kleine-König <uwe@kleine-koenig.org> Signed-off-by:
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Uwe Kleine-König authored
zx_pwm_probe() called clk_prepare_enable() before; this must be undone in the error path. Fixes: 4836193c ("pwm: Add ZTE ZX PWM device driver") Signed-off-by:
Shawn Guo <shawn.guo@linaro.org> Signed-off-by:
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Uwe Kleine-König authored
pwmchip_add() doesn't emit an error message, so add one in the driver. Signed-off-by:
Linus Walleij <linus.walleij@linaro.org> Signed-off-by:
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Anson Huang authored
dev_err_probe() can reduce code size, uniform error handling and record the defer probe reason etc., use it to simplify the code. Signed-off-by:
Anson Huang <Anson.Huang@nxp.com> Acked-by:
Lee Jones <lee.jones@linaro.org> Acked-by:
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Anson Huang authored
dev_err_probe() can reduce code size, uniform error handling and record the defer probe reason etc., use it to simplify the code. Signed-off-by:
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Anson Huang authored
dev_err_probe() can reduce code size, uniform error handling and record the defer probe reason etc., use it to simplify the code. Signed-off-by:
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Yangtao Li authored
Use devm_platform_ioremap_resource() to simplify code. Signed-off-by:
Yangtao Li <tiny.windzz@gmail.com> Acked-by:
Claudiu Beznea <claudiu.beznea@microchip.com> Reviewed-by:
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Yangtao Li authored
Use devm_platform_ioremap_resource() to simplify code. Signed-off-by:
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Yangtao Li authored
Use devm_platform_ioremap_resource() to simplify code. While at it, also declare the "i" and "ret" variables on the same line since they are of the same type. Signed-off-by:
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Yangtao Li authored
Use devm_platform_ioremap_resource() to simplify code. Signed-off-by:
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Yangtao Li authored
Use devm_platform_ioremap_resource() to simplify code. Signed-off-by:
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Yangtao Li authored
Use devm_platform_ioremap_resource() to simplify code. Signed-off-by:
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Yangtao Li authored
Use devm_platform_ioremap_resource() to simplify code. Signed-off-by:
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Yangtao Li authored
Use devm_platform_ioremap_resource() to simplify code. Signed-off-by:
Nicolas Saenz Julienne <nsaenzjulienne@suse.de> Reviewed-by:
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Yangtao Li authored
Use devm_platform_ioremap_resource() to simplify code. Signed-off-by:
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Yangtao Li authored
Use devm_platform_ioremap_resource() to simplify code. Signed-off-by:
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Yangtao Li authored
Use devm_platform_ioremap_resource() to simplify code. Signed-off-by:
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Yangtao Li authored
Use devm_platform_ioremap_resource() to simplify code. Signed-off-by:
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Yangtao Li authored
Use devm_platform_ioremap_resource() to simplify code. Signed-off-by:
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Yangtao Li authored
Use devm_platform_ioremap_resource() to simplify code. Signed-off-by:
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Yangtao Li authored
Use devm_platform_ioremap_resource() to simplify code. Signed-off-by:
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Yangtao Li authored
Use devm_platform_ioremap_resource() to simplify code. Signed-off-by:
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Yangtao Li authored
Use devm_platform_ioremap_resource() to simplify code. Signed-off-by:
Heiko Stuebner <heiko@sntech.de> Reviewed-by:
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Yangtao Li authored
Use devm_platform_ioremap_resource() to simplify code. Signed-off-by:
Martin Blumenstingl <martin.blumenstingl@googlemail.com> Reviewed-by:
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Yangtao Li authored
Use devm_platform_ioremap_resource() to simplify code. Signed-off-by:
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Yangtao Li authored
Use devm_platform_ioremap_resource() to simplify code. Signed-off-by:
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Yangtao Li authored
Use devm_platform_ioremap_resource() to simplify code. Signed-off-by:
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Yangtao Li authored
Use devm_platform_ioremap_resource() to simplify code. Signed-off-by:
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