linux-kernel - Re: [PATCH v4 3/3] phy: intel: Add driver support for ComboPhy

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Date:   Mon, 2 Mar 2020 13:19:01 +0200
From:   Andy Shevchenko <andriy.shevchenko@...el.com>
To:     Dilip Kota <eswara.kota@...ux.intel.com>
Cc:     linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        kishon@...com, robh@...nel.org, cheol.yong.kim@...el.com,
        chuanhua.lei@...ux.intel.com, qi-ming.wu@...el.com,
        yixin.zhu@...el.com
Subject: Re: [PATCH v4 3/3] phy: intel: Add driver support for ComboPhy

On Mon, Mar 02, 2020 at 04:43:25PM +0800, Dilip Kota wrote:
> ComboPhy subsystem provides PHYs for various
> controllers like PCIe, SATA and EMAC.

Thanks for an update, my (few minor) comments below.

...

> +enum intel_phy_mode {
> +	PHY_PCIE_MODE = 0,
> +	PHY_XPCS_MODE,

> +	PHY_SATA_MODE

>From here it's not visible that above is the only possible values.
Maybe in the future you will have another mode.
So, I suggest to leave comma here...

> +};

> +enum intel_combo_mode {
> +	PCIE0_PCIE1_MODE = 0,
> +	PCIE_DL_MODE,
> +	RXAUI_MODE,
> +	XPCS0_XPCS1_MODE,

> +	SATA0_SATA1_MODE

...and here...

> +};
> +
> +enum aggregated_mode {
> +	PHY_SL_MODE,

> +	PHY_DL_MODE

...and here.

> +};

...

> +static int intel_cbphy_iphy_cfg(struct intel_cbphy_iphy *iphy,
> +				int (*phy_cfg)(struct intel_cbphy_iphy *))
> +{
> +	struct intel_combo_phy *cbphy = iphy->parent;
> +	struct intel_cbphy_iphy *sphy;
> +	int ret;
> +
> +	ret = phy_cfg(iphy);
> +	if (ret)
> +		return ret;
> +
> +	if (cbphy->aggr_mode != PHY_DL_MODE)
> +		return 0;
> +

> +	sphy = &cbphy->iphy[PHY_1];

Do you really need temporary variable here?

> +
> +	return phy_cfg(sphy);
> +}

...

> +	if (!cbphy->init_cnt) {

	if (init_cnt)
		return 0;

?

> +		clk_disable_unprepare(cbphy->core_clk);
> +		intel_cbphy_rst_assert(cbphy);
> +	}
> +
> +	return 0;

-- 
With Best Regards,
Andy Shevchenko