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path: root/drivers/pwm/pwm-sti.c
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2015-01-30pwm: sti: Maintain a bitmap of configured devicesAjit Pal Singh1-19/+11
This patch introduces a bitmap which is used to keep track of the pwm channels which have been configured in a pwm chip. The method used earlier to find the number of configured channels, was to count the pwmdevices with PWMF_REQUESTED field set and period value configured. This was not correct and failed when of_pwm_get()/pwm_get() and then pwm_config() was used. Signed-off-by: Ajit Pal Singh <[email protected]> Signed-off-by: Thierry Reding <[email protected]>
2014-08-08pwm: sti: Remove PWM period tableAjit Pal Singh1-48/+16
Removes the PWM period table. Instead the prescaler is computed from the period value passed in the config() function. Signed-off-by: Ajit Pal Singh <[email protected]> Signed-off-by: Lee Jones <[email protected]> Signed-off-by: Thierry Reding <[email protected]>
2014-08-08pwm: sti: Sync between enable/disable callsAjit Pal Singh1-14/+30
ST PWM IP has a common enable/disable control for all the PWM channels on a PWM cell. Disables PWM output on the PWM HW only when disable is called for the last channel. Signed-off-by: Ajit Pal Singh <[email protected]> Signed-off-by: Lee Jones <[email protected]> Signed-off-by: Thierry Reding <[email protected]>
2014-08-08pwm: sti: Ensure same period values for all channelsAjit Pal Singh1-44/+96
ST PWM IP shares the same clock prescaler across all the PWM channels. Hence configuration requests which change the period will affect all the channels. Do not allow period changes which will stomp period settings of the already configured channels. Signed-off-by: Ajit Pal Singh <[email protected]> Signed-off-by: Lee Jones <[email protected]> Signed-off-by: Thierry Reding <[email protected]>
2014-08-08pwm: sti: Fix PWM prescaler handlingAjit Pal Singh1-11/+27
This patch fixes the pwm driver to write the complete 8 bits of the prescaler value to the PWM Control register. Signed-off-by: Ajit Pal Singh <[email protected]> Signed-off-by: Lee Jones <[email protected]> Signed-off-by: Thierry Reding <[email protected]>
2014-08-07pwm: sti: Add new driver for ST's PWM IPLee Jones1-0/+366
This driver supports all current STi platforms' PWM IPs. Signed-off-by: Ajit Pal Singh <[email protected]> Signed-off-by: Lee Jones <[email protected]> [thierry.reding: rename module to pwm-sti, fix build breakage] Signed-off-by: Thierry Reding <[email protected]>
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