Messages in this thread | | | From | "Philip, Avinash" <> | Subject | RE: [PATCH v3 0/3] Platform support for EHRPWM & ECAP devices in DAVINCI. | Date | Thu, 4 Apr 2013 04:39:05 +0000 |
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On Tue, Apr 02, 2013 at 14:05:09, Nori, Sekhar wrote: > On 3/25/2013 1:19 PM, Philip Avinash wrote: > > Add platform support for EHRPWM and ECAP by providing clock nodes and > > device tree nodes. > > This series depends on [1] and [2] and is available for testing at [3]. > > Tested for back light support in da850 EVM with EHRPWM PWM device. > > > > [1] http://gitorious.org/linux-davinci/linux-davinci/trees/davinci-for-v3.9/dt-2 > > [2] https://gitorious.org/linux-pwm/linux-pwm/trees/for-next > > [3] https://github.com/avinashphilip/am335x_linux/tree/davinci-for-v3.9_soc_pwm > > > > Note: > > DT support for EHRPWM backlight has not been added in da850-evm.dts as there is > > conflicting pin-mux requirement with SPI flash. > > Can you check if this is really true even in newer boards (have a look > at the latest schematics)? I remember this used to be a problem in very > early versions but was fixed later.
On looking schematics, panel has three power controls LCD_BACKLIGHT_PWR, LCD_PANEL_PWR, LCD_PWM0. On latest schematic, LCD_PWM0 is connected to ECAP instance 2. So backlight can control through ECAP2 (not conflicting with SPI1 cs0). Still for controlling backlight, require support for LCD_BACKLIGHT_PWR & LCD_PANEL_PWR. These signals to be controlled by GPIO 2[8] & GPIO 2[15]. In release platform callbacks used to control GPIO functionality. But with DT support, I have to check how platform callbacks can be used.
Thanks Avinash
> > Thanks, > Sekhar >
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