[U-Boot] [U-Boot, v5, 3/5] mtd: nand: fix GET/SET_FEATURES address on 16-bit devices

[Tom Rini]

On Tue, May 06, 2014 at 12:46:18AM +0530, pekon gupta wrote:

> From: David Mosberger <davidm at egauge.net>
> 
> As per following Sections in ONFI Spec, GET_FEATURES and SET_FEATURES also need
> byte-addressing on 16-bit devices.
> 
> *Section: Target Initialization"
> "The Read ID and Read Parameter Page commands only use the lower 8-bits of the
>  data bus. The host shall not issue commands that use a word data width on x16
>  devices until the host determines the device supports a 16-bit data bus width
>  in the parameter page."
> 
> *Section: Bus Width Requirements*
> "When the host supports a 16-bit bus width, only data is transferred at the
>  16-bit width. All address and command line transfers shall use only the lower
>  8-bits of the data bus. During command transfers, the host may place any value
>  on the upper 8-bits of the data bus. During address transfers, the host shall
>  set the upper 8-bits of the data bus to 00h."
> 
> So porting following commit from linux kernel
>     commit e34fcb07a6d57411de6e15a47724fbe92c5caa42
>     Author: David Mosberger <davidm at egauge.net>  (preserving authorship)
>     mtd: nand: fix GET/SET_FEATURES address on 16-bit devices
> 
> Signed-off-by: Pekon Gupta <pekon at ti.com>

Applied to u-boot-ti/master, thanks!

-- 
Tom
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