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authorBoris BREZILLON <linux-arm@overkiz.com>2013-01-08 19:36:42 +0400
committerThierry Reding <thierry.reding@avionic-design.de>2013-01-08 19:52:10 +0400
commit9421bade0765d8ffb86b8a99213b611278a3542a (patch)
tree83bacefbd5536255dae0fba58bff5bdacdf2b6b8 /drivers/pwm/pwm-vt8500.c
parentd1c3ed669a2d452cacfb48c2d171a1f364dae2ed (diff)
downloadlinux-9421bade0765d8ffb86b8a99213b611278a3542a.tar.xz
pwm: atmel: add Timer Counter Block PWM driver
This patch adds a PWM driver based on Atmel Timer Counter Block. The Timer Counter Block is used in Waveform generator mode. A Timer Counter Block provides up to 6 PWM devices grouped by 2: * group 0 = PWM 0 and 1 * group 1 = PWM 2 and 3 * group 2 = PMW 4 and 5 PWM devices in a given group must be configured with the same period value. If a PWM device in a group tries to change the period value and the other device is already configured with a different value an error will be returned. This driver requires device tree support. The Timer Counter Block number used to create a PWM chip is given by the tc-block field in an "atmel,tcb-pwm" compatible node. This patch was tested on kizbox board (at91sam9g20 SoC) with pwm-leds. Signed-off-by: Boris BREZILLON <linux-arm@overkiz.com> Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
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