Fri, 23 May 2014 15:31:44 +0300 от Tomi Valkeinen <tomi.valkeinen@xxxxxx>:
> On 12/04/14 09:53, Alexander Shiyan wrote:
> > This adds support for the framebuffer available in the Cirrus
> > Logic CLPS711X CPUs.
> > FB features:
> > - 1-2-4 bits per pixel.
> > - Programmable panel size to a maximum of 1024x256 at 4 bps.
> > - Relocatible Frame Buffer (SRAM or SDRAM).
> > - Programmable refresh rates.
> > - 16 gray scale values.
> > This new driver supports usage with devicetree and as a general
> > change it removes last user of <mach/hardware.h> for CLPS711X targets,
> > so this subarch will fully prepared to switch to multiplatform.
> > The driver have been tested with custom board equipped Cirrus Logic
> > EP7312 in DT and non-DT mode.
> >
> > Signed-off-by: Alexander Shiyan <shc_work@xxxxxxx>
> > ---
> > drivers/video/fbdev/clps711x-fb.c | 456 ++++++++++++++++++++++++++++++++++++++
> > 1 file changed, 456 insertions(+)
> > create mode 100644 drivers/video/fbdev/clps711x-fb.c
>
> <snip>
>
> > +
> > +static int clps711x_fb_get_mode_dt(struct platform_device *pdev)
> > +{
> > + struct device_node *disp, *np = pdev->dev.of_node;
> > + struct fb_info *info = platform_get_drvdata(pdev);
> > + struct clps711x_fb_info *cfb = info->par;
> > + int ret;
> > +
> > + cfb->syscon =
> > + syscon_regmap_lookup_by_compatible("cirrus,clps711x-syscon1");
> > + if (IS_ERR(cfb->syscon))
> > + return PTR_ERR(cfb->syscon);
>
> Hmm, what's the syscon stuff about? Looks like it's required, but the DT
> documentation patch doesn't mention it at all.
This does not require any separate property for FB.
The syscon registers is global to platform.
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