On Tue 20 Dec 09:03 PST 2016, Vivek Gautam wrote:
> diff --git a/drivers/phy/phy-qcom-qmp.c b/drivers/phy/phy-qcom-qmp.c
[..]
> +static int qcom_qmp_phy_poweron(struct phy *phy)
[..]
> +
> +err3:
Rather than naming your labels errX, it's idiomatic to give them
descriptive names, e.g. "disable_ref_clk" here.
> + clk_disable_unprepare(qphy->ref_clk);
> +err2:
> + regulator_disable(qphy->vddp_ref_clk);
> +err1:
> + regulator_disable(qphy->vdda_pll);
> +err:
> + regulator_disable(qphy->vdda_phy);
> + return ret;
> +}
[..]
> +static int qcom_qmp_phy_com_init(struct qcom_qmp_phy *qphy)
> +{
> + const struct qmp_phy_cfg *cfg = qphy->cfg;
> + void __iomem *serdes = qphy->serdes;
> + int ret;
> +
> + mutex_lock(&qphy->phy_mutex);
> + if (qphy->init_count++) {
> + mutex_unlock(&qphy->phy_mutex);
> + return 0;
> + }
As far as I can see phy_init() and phy_exit() already keep reference
count on the initialization and you only call this function from
phy_ops->init, so you should be able to drop this.
[..]
> +
> +/* PHY Initialization */
> +static int qcom_qmp_phy_init(struct phy *phy)
> +{
[..]
> + /* phy power down delay; given in PCIE phy programming guide only */
> + if (qphy->cfg->type == PHY_TYPE_PCIE)
Rather than basing this off "is this pcie" it's preferred if you have a
bool power_down_delay; (or optionally carrying the timeout value) to
control this.
> + usleep_range(POWER_DOWN_DELAY_US_MIN, POWER_DOWN_DELAY_US_MAX);
> +
> + /* start SerDes and Phy-Coding-Sublayer */
> + qphy_setbits(pcs + QPHY_START_CTRL, cfg->start_ctrl);
> +
> + /* Pull PHY out of reset state */
> + qphy_clrbits(pcs + QPHY_SW_RESET, SW_RESET);
> +
> + status = pcs + cfg->regs[QPHY_PCS_READY_STATUS];
> + mask = cfg->mask_pcs_ready;
> +
> + ret = !mask ? 0 : readl_poll_timeout(status, val, !(val & mask), 1,
> + PHY_INIT_COMPLETE_TIMEOUT);
I presume it's not okay to read the status register even once for pcie?
If it is you can skip the conditional as !(val & 0) will break the poll
after the first read.
[..]
> +static int qcom_qmp_phy_exit(struct phy *phy)
> +{
[..]
> +}
> +
> +
Extra blank line
> +static int qcom_qmp_phy_regulator_init(struct device *dev)
[..]
> +static
> +struct qmp_phy_desc *qcom_qmp_phy_create(struct platform_device *pdev, int id)
> +{
[..]
> + phy_desc->pipe_clk = devm_clk_get(dev, prop_name);
> + if (IS_ERR(phy_desc->pipe_clk)) {
> + if (qphy->cfg->type == PHY_TYPE_PCIE ||
> + qphy->cfg->type == PHY_TYPE_USB3) {
Is this check adding any value?
> + ret = PTR_ERR(phy_desc->pipe_clk);
> + if (ret != -EPROBE_DEFER)
> + dev_err(dev,
> + "failed to get lane%d pipe_clk, %d\n",
> + id, ret);
> + return ERR_PTR(ret);
> + }
> + phy_desc->pipe_clk = NULL;
Regards,
Bjorn
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