On Thu, Dec 29, 2016 at 4:31 AM, Stephen Boyd <sboyd@xxxxxxxxxxxxxx> wrote: > On 12/20, Vivek Gautam wrote: >> PHY transceiver driver for QUSB2 phy controller that provides >> HighSpeed functionality for DWC3 controller present on >> Qualcomm chipsets. >> >> Signed-off-by: Vivek Gautam <vivek.gautam@xxxxxxxxxxxxxx> > > One comment below, but otherwise > > Reviewed-by: Stephen Boyd <sboyd@xxxxxxxxxxxxxx> > >> +static void qusb2_phy_set_tune2_param(struct qusb2_phy *qphy) >> +{ >> + struct device *dev = &qphy->phy->dev; >> + u8 *val; >> + >> + /* >> + * Read efuse register having TUNE2 parameter's high nibble. >> + * If efuse register shows value as 0x0, or if we fail to find >> + * a valid efuse register settings, then use default value >> + * as 0xB for high nibble that we have already set while >> + * configuring phy. >> + */ >> + val = nvmem_cell_read(qphy->cell, NULL); >> + if (IS_ERR(val) || !val[0]) { >> + dev_dbg(dev, "failed to read a valid hs-tx trim value, %ld\n", >> + PTR_ERR(val)); > > If val is 0 PTR_ERR(0) will be junk? I guess that's ok for debug > print. May be -EINVAL is better for debug print. Even when val[0] is 0, val will still be a valid pointer, and so PTR_ERR(val) will essentially be the pointer casted to long. Thanks Vivek -- Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux Foundation Collaborative Project -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html