On Tue, Jan 08, 2013 at 04:36:42PM +0100, Boris BREZILLON wrote: > Hi, > > This patch adds a PWM driver based on Atmel Timer Counter Block. > 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 tc-block field in an "atmel,tcb-pwm" compatible node. > > This patch was tested on kizbox board (at91sam9g20 SoC) with > pwm-leds. > > Regards, > > Boris > > Signed-off-by: Boris BREZILLON <[email protected]> > --- > Changes since v1: > - Fix device tree binding Documentation > - Fix Kconfig issues (missing OF dependency, > deprecated HAVE_PWM select, ...) > - Fix various coding style issues. > - Cleanup code and add some comments. > > Changes since v2: > - Replace kzalloc/kfree with managed versions > (devm_kzalloc/devm_kfree). > - Add one cell to device tree binding to support polarity > flag. > - Replace min computation (2 div -> 1 mul + 1 div). > > Changes since v3: > - Fix device tree binding Documentation > - Fix Kconfig description > - Fix coding style issues (function parameters alignment) > - Replace 1000000000 value with NSEC_PER_SEC macro > - Get rid of newcmr variable in enable/disable functions > - Remove unneeded devm_kfree > - Add missing atmel_tc_free > > Changes since v4: > - Add missing comments > - Fix coding style issues (multi-line error string) > - Fix wrong MODULE_DEVICE_TABLE setting > - Remove unneeded MODULE_ALIAS declaration > > .../devicetree/bindings/pwm/atmel-tcb-pwm.txt | 18 + > drivers/pwm/Kconfig | 12 + > drivers/pwm/Makefile | 1 + > drivers/pwm/pwm-atmel-tcb.c | 445 > ++++++++++++++++++++ > 4 files changed, 476 insertions(+), 0 deletions(-) > create mode 100644 Documentation/devicetree/bindings/pwm/atmel-tcb-pwm.txt > create mode 100644 drivers/pwm/pwm-atmel-tcb.c
Applied with minor changes to the commit message, thanks. Thierry
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