APPLIED: [PATCH v3 0/1][SRU][Bionic] add 16-bit width registers support for EEPROM at24 device

[Khaled Elmously]

On 2020-06-01 13:54:30 , AceLan Kao wrote:
> BugLink: https://bugs.launchpad.net/bugs/1876699
> 
> [Impact]
> Larger EEPROM devices that use 16-bit addresses couldn't be accessed.
> 
> The i2c/smbus currently only support to access data with 8-bit width of
> address. In some larger device, such as larger EEPROM, it requires to
> access the address large than 0xff, so it needs to extend address space
> to 16-bit width.
> 
> [Fix]
> This commit is derivated from below commit, and then modified and provided
> by customer
> https://patchwork.ozlabs.org/patch/545292/
> 
> Unfortunately, this commit doesn't get into mainline in the end, so I
> migrate the commit to latest kernel and finally get it merged.
> https://lkml.org/lkml/2020/4/24/635
> 
> [Test]
> Verified on Eurotech's platforms.
> 
> [Regression Potential]
> Low, this patch only changes the behavior of the device which has
> AT24_FLAG_ADDR16 flag and change the page_size to 64 if the device name
> is 24c256.
> 
> Pieri (1):
>   UBUNTU: SAUCE: at24-smbus-16bit-address
> 
>  drivers/misc/eeprom/Kconfig |   5 +-
>  drivers/misc/eeprom/at24.c  | 139 +++++++++++++++++++++++++++++++-----
>  2 files changed, 127 insertions(+), 17 deletions(-)
> 
> -- 
> 2.25.1
> 
> 
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