Re: [PATCH v3] usb: phy: mxs: Add DT bindings to configure TX settings
From: Rob Herring <hidden>
Date: 2016-03-23 14:54:24
On Mon, Mar 21, 2016 at 12:32:27PM -0400, Jaret Cantu wrote:
The TX settings can be calibrated for particular hardware. The phy is reset by Linux, so this cannot be handled by the bootloader. The TRM mentions that the maximum resistance should be used for the DN/DP calibration in order to pass USB certification. The values for the TX registers are poorly described in the TRM. The meanings of the register values were taken from another Freescale-provided document: https://community.freescale.com/message/566147#comment-566912 Signed-off-by: Jaret Cantu <redacted> --- v3. Added unit suffix (-ohms) to tx-cal-45-d* v2. Copying devicetree list Removed prettifying extra whitespace Removed unnecessary register rewrite on resume Use min and max constants for clarity .../devicetree/bindings/phy/mxs-usb-phy.txt | 10 ++++ drivers/usb/phy/phy-mxs-usb.c | 58 ++++++++++++++++++++ 2 files changed, 68 insertions(+)
Acked-by: Rob Herring <redacted> -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html