evie/android_kernel_oneplus_msm8998
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usb: pd: pdphy: Update Tx Trim setting

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HW recommendation is to set the TX_TRIM_3 value to 0x2 for
a steeper slope. This improves eye diagram testing result.
This register is secure access so write to the SEC_ACCESS
prior to setting this.

Change-Id: I80b0a02feb0e4d1fb382407087fa30f390641ccb
Signed-off-by: Jack Pham <jackp@codeaurora.org>
This commit is contained in:
Jack Pham 2016-11-17 11:55:03 -08:00
parent 1526cac8ab
commit 8bd4723a22
1 changed files with 11 additions and 0 deletions
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11
drivers/usb/pd/qpnp-pdphy.c
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@ -71,6 +71,9 @@
#define USB_PDPHY_RX_BUFFER 0x80
#define USB_PDPHY_SEC_ACCESS 0xD0
#define USB_PDPHY_TRIM_3 0xF3
/* VDD regulator */
#define VDD_PDPHY_VOL_MIN 3088000 /* uV */
#define VDD_PDPHY_VOL_MAX 3088000 /* uV */
@ -806,6 +809,14 @@ static int pdphy_probe(struct platform_device *pdev)
if (ret < 0)
return ret;
ret = pdphy_reg_write(pdphy, USB_PDPHY_SEC_ACCESS, 0xA5);
if (ret)
return ret;
ret = pdphy_reg_write(pdphy, USB_PDPHY_TRIM_3, 0x2);
if (ret)
return ret;
/* usbpd_create() could call back to us, so have __pdphy ready */
__pdphy = pdphy;