[PATCH] phy: phy-brcm-usb: fixup BCM4908 support
Vinod Koul
vkoul at kernel.org
Fri Feb 25 01:02:46 PST 2022
On 18-02-22, 18:24, Rafał Miłecki wrote:
> From: Rafał Miłecki <rafal at milecki.pl>
>
> Just like every other family BCM4908 should get its own enum value. That
> is required to properly handle it in chipset conditional code.
>
> The real change is excluding BCM4908 from the PLL reprogramming code
> (see brcmusb_usb3_pll_54mhz()). I'm not sure what's the BCM4908
> reference clock frequency but:
> 1. BCM4908 custom driver from Broadcom's SDK doesn't reprogram PLL
> 2. Doing that in Linux driver stopped PHY handling some USB 3.0 devices
>
> This change makes USB 3.0 PHY recognize e.g.:
> 1. 04e8:6860 - Samsung Electronics Co., Ltd Galaxy series, misc. (MTP mode)
> 2. 1058:259f - Western Digital My Passport 259F
>
> Broadcom's STB SoCs come with a set of SUN_TOP_CTRL_* registers that
> allow reading chip family and product ids. Such a block & register is
> missing on BCM4908 so this commit introduces "compatible" string
> specific binding.
Applied, thanks
--
~Vinod
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