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

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Date:   Tue, 3 Mar 2020 16:41:17 +0800
From:   Dilip Kota <eswara.kota@...ux.intel.com>
To:     Andy Shevchenko <andriy.shevchenko@...el.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 3/2/2020 7:19 PM, Andy Shevchenko wrote:
> 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...
There won't be no further modes,...
i can still add the comma at all the places pointed.
>
>> +};
>> +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?
Can be removed, i will update in the next patch.
>
>> +
>> +	return phy_cfg(sphy);
>> +}
> ...
>
>> +	if (!cbphy->init_cnt) {
> 	if (init_cnt)
> 		return 0;
>
> ?

Sure, will do the same.


Thanks,
Dilip

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