[U-Boot] [PATCH 1/5] mmc: sunxi: add support for automatic delay calibration

[Maxime Ripard]

On Sun, Sep 30, 2018 at 04:16:36PM +0100, André Przywara wrote:
> On 9/30/18 12:45 AM, Vagrant Cascadian wrote:
> > From: Vasily Khoruzhick <anarsoul at gmail.com>
> > 
> > A64 supports automatic delay calibration and Linux driver uses it
> > instead of hardcoded delays. Add support for it to u-boot driver.
> 
> So technically that should be derived from the node's compatible string,
> like we do in Linux. But I see that we are not there yet in U-Boot.
> Meanwhile I don't think you should introduce a new Kconfig option, you
> could keep the hacky U-Boot style and just add an
> #if defined(CONFIG_MACH_SUN50I) || defined(CONFIG_MACH_SUN50I_H6)
> to the two places instead.

IIRC, the calibration is only needed for the eMMC though, so we'd need
to check that against the MMC number too.

Maxime

-- 
Maxime Ripard, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com
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