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In am33xx SoC[1], enhanced capture (eCAP) supports auxiliary PWM (APWM).
This series adds the PWM driver support for the APWM feature for eCAP on
AM33xx.
eCAP HW also supports the capture mode. Currently, this driver only
supports APWM.
This is based on the Linux kernel driver -> drivers/pwm/pwm-tiecap.c
Version: v6.12
Tested on AM335x EVM[2].
[1] AM335x TRM - https://www.ti.com/lit/ug/spruh73q/spruh73q.pdf
[2] AM335x EVM - https://www.ti.com/tool/TMDXEVM3358
Signed-off-by: Sukrut Bellary <[email protected]>
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Add driver to support pwm on STM32MP1X SoCs. The PWM signal is generated
using a multifuntion timer which provide a pwm feature. Clock rate and
addresses are retrieved from the multifunction timer driver.
Signed-off-by: Cheick Traore <[email protected]>
Reviewed-by: Fabrice Gasnier <[email protected]>
Reviewed-by: Patrice Chotard <[email protected]>
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Move pwm_imx_get_parms, pwm_id_to_reg functions into pwm-imx.c
and drop off pwm-imx-util.c
Signed-off-by: Tommaso Merciai <[email protected]>
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TTC has three modes of operations. Timer, PWM and input counters.
There is already driver for timer under CADENCE_TTC_TIMER which is used for
ZynqMP R5 configuration.
This driver is targeting PWM which is for example configuration which can
be used for fan control.
The driver has been tested on Xilinx Kria SOM platform where fan is
connected to one PL pin. When TTC output is connected via EMIO to PL pin
TTC pwm can be configured and tested for example like this:
pwm config 0 0 10000 1200
pwm enable 0 0
pwm config 0 0 10000 1400
pwm config 0 0 10000 1600
Signed-off-by: Michal Simek <[email protected]>
Reviewed-by: Sean Anderson <[email protected]>
Link: https://lore.kernel.org/r/915a662ddb88f7a958ca1f307e8fea59af9d7feb.1634303847.git.michal.simek@xilinx.com
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This patch add the support of PWM controller which can be found at aspeed
ast2600 soc. The pwm supoorts up to 16 channels and it's part function
of multi-function device "pwm-tach controller".
Signed-off-by: Billy Tsai <[email protected]>
Reviewed-by: Simon Glass <[email protected]>
Reviewed-by: Chia-Wei Wang <[email protected]>
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Add support for the PWM found on the SAMA5D2 family of devices.
Signed-off-by: Dan Sneddon <[email protected]>
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This PWM is used in rk3399-gru-bob and rk3399-gru-kevin to control
the display brightness. We can only change the duty cycle, so on
set_config() we just try to match the duty cycle that dividing duty_ns
by period_ns gives us. To disable, we set the duty cycle to zero while
keeping the old value for when we want to re-enable it.
The cros_ec_set_pwm_duty() function is taken from Depthcharge's
cros_ec_set_bl_pwm_duty() but modified to use the generic pwm type.
The driver itself is very loosely based on rk_pwm.c for the general pwm
driver structure.
The devicetree binding file is from Linux, before it was converted to
YAML at 5df5a577a6b4 ("dt-bindings: pwm: Convert google,cros-ec-pwm.txt
to YAML format") in their repo.
Signed-off-by: Alper Nebi Yasak <[email protected]>
Reviewed-by: Simon Glass <[email protected]>
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Enhanced high resolution PWM module (EHRPWM) hardware can be used to
generate PWM output over 2 channels. This commit adds PWM driver support
for EHRPWM device present on AM33XX SOC.
The code is based on the drivers/pwm/pwm-tiehrpwm.c driver of the Linux
kernel version 5.9-rc7.
For DT binding details see:
- Documentation/devicetree/bindings/pwm/pwm-tiehrpwm.txt
Signed-off-by: Dario Binacchi <[email protected]>
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This adds the driver for the PWM controller found in the Amlogic SoCs.
This PWM is only a set of Gates, Dividers and Counters:
PWM output is achieved by calculating a clock that permits calculating
two periods (low and high). The counter then has to be set to switch after
N cycles for the first half period.
The hardware has no "polarity" setting. This driver reverses the period
cycles (the low length is inverted with the high length) for
PWM_POLARITY_INVERSED.
Disabling the PWM stops the output immediately (without waiting for the
current period to complete first).
Signed-off-by: Neil Armstrong <[email protected]>
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Adds a PWM driver for PWM chip present in SiFive's HiFive Unleashed SoC
This driver is simple port of Linux pwm sifive driver from Linux v5.6
commit: 9e37a53eb051 ("pwm: sifive: Add a driver for SiFive SoC PWM")
Signed-off-by: Yash Shah <[email protected]>
Reviewed-by: Heiko Schocher <[email protected]>
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This driver support the standard PWM API for
MediaTek MT7623, MT7622 and MT7629 SoCs
Signed-off-by: Sam Shih <[email protected]>
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This commit adds basic support for PWM found on Allwinner A64.
It can be used for pwm_backlight driver (e.g. for Pinebook)
Signed-off-by: Vasily Khoruzhick <[email protected]>
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When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from. So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry. Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.
In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.
This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents. There's also a few places where I found we did not have a tag
and have introduced one.
Signed-off-by: Tom Rini <[email protected]>
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Unfortunately a test for the PWM uclass was not included when it was
submitted. This was noticed when trying to add more functionality:
http://patchwork.ozlabs.org/patch/748172/
Add a simple test to get us started.
Signed-off-by: Simon Glass <[email protected]>
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Both CONFIG_PWM_TEGRA and CONFIG_PWM_EXYNOS depend on CONFIG_DM_PWM,
i.e. they are already guarded by Kconfig correctly. Remove unneeded
ifdef CONFIG_DM_PWM ... endif.
While we are here, let's tidy up alignment and sort the lines
alphabetically in Makefile.
Signed-off-by: Masahiro Yamada <[email protected]>
Reviewed-by: Simon Glass <[email protected]>
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This driver supports the standard PWM API. There are 5 PWMs. Four are used
normally and the last is normally used as a timer.
Signed-off-by: Simon Glass <[email protected]>
Signed-off-by: Minkyu Kang <[email protected]>
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This PWM supports four channels. The driver always uses the 32KHz clock,
and adjusts the duty cycle accordingly.
Signed-off-by: Simon Glass <[email protected]>
Signed-off-by: Tom Warren <[email protected]>
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Add a simple driver which implements the standard PWM uclass interface.
Signed-off-by: Simon Glass <[email protected]>
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Add a uclass that supports Pulse Width Modulation (PWM) devices. It
provides methods to enable/disable and configure the device.
Signed-off-by: Simon Glass <[email protected]>
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add basic support for the pwm modul found on imx6.
Pieces of this code are based on linux code from drivers/pwm/pwm-imx.c
Commit "cd3de83f1476 Linux 3.16-rc4"
Signed-off-by: Heiko Schocher <[email protected]>
Acked-by: Stefano Babic <[email protected]>
Cc: Wolfgang Denk <[email protected]>
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