Re: [PATCH V9 2/7] phy: Add drivers for PCIe and SATA phy on SPEAr13xx

[Kishon Vijay Abraham I <kishon@ti.com>]

On Thursday 10 July 2014 07:00 PM, Viresh Kumar wrote:
> On 10 July 2014 18:47, Kishon Vijay Abraham I <kishon@ti.com> wrote:
>> On Thursday 10 July 2014 12:56 PM, Viresh Kumar wrote:
>>> From: Pratyush Anand <pratyush.anand@st.com>
>>>
>>> ARM based ST Microelectronics's SPEAr1310/40 platforms uses ST's phy (known as
>>> 'miphy') for PCIe and SATA. This patch adds drivers for these miphys.
>>>
>>> This also adds proper bindings for miphys.
>>>
>>> Acked-by: Arnd Bergmann <arnd@arndb.de>
>>> Signed-off-by: Pratyush Anand <pratyush.anand@st.com>
>>> Tested-by: Mohit Kumar <mohit.kumar@st.com>
>>> Cc: Kishon Vijay Abraham I <kishon@ti.com>
>>> [viresh: fixed logs/cclist/checkpatch warnings, broken into smaller patches]
>>> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
>>> ---
>>>  .../devicetree/bindings/phy/st-spear1310-miphy.txt |  12 +
>>>  .../devicetree/bindings/phy/st-spear1340-miphy.txt |  11 +
>>>  drivers/phy/Kconfig                                |  12 +
>>>  drivers/phy/Makefile                               |   2 +
>>>  drivers/phy/phy-spear1310-miphy.c                  | 274 +++++++++++++++++++
>>>  drivers/phy/phy-spear1340-miphy.c                  | 302 +++++++++++++++++++++
>>
>> Please send separate patche for each driver.
> 
> These were both around SPEAr and were on the same lines.
> So sending these in a single patch shouldn't be a big issue I believe.
> 
> In case another version is required, I may do it.
> 
>>> diff --git a/Documentation/devicetree/bindings/phy/st-spear1310-miphy.txt b/Documentation/devicetree/bindings/phy/st-spear1310-miphy.txt
>>> new file mode 100644
>>> index 0000000..b9b281a
>>> --- /dev/null
>>> +++ b/Documentation/devicetree/bindings/phy/st-spear1310-miphy.txt
>>
>> We generally create a single document for a SoC vendor. So just use st-phy.txt.
> 
> Probably yes.
> 
>> <snip>
> 
> Please keep line containing file names while removing stuff, makes it easy
> to locate code.

ah.. apologies..
> 
>>> +
>>> +static int spear1340_miphy_sata_init(struct spear1340_miphy_priv *priv)
>>> +{
>>> +     regmap_update_bits(priv->misc, SPEAR1340_PCIE_SATA_CFG,
>>> +                        SPEAR1340_PCIE_SATA_CFG_MASK,
>>> +                        SPEAR1340_SATA_CFG_VAL);
>>> +     regmap_update_bits(priv->misc, SPEAR1340_PCIE_MIPHY_CFG,
>>> +                        SPEAR1340_PCIE_MIPHY_CFG_MASK,
>>> +                        SPEAR1340_PCIE_SATA_MIPHY_CFG_SATA_25M_CRYSTAL_CLK);
>>> +     /* Switch on sata power domain */
>>> +     regmap_update_bits(priv->misc, SPEAR1340_PCM_CFG,
>>> +                        SPEAR1340_PCM_CFG_SATA_POWER_EN,
>>> +                        SPEAR1340_PCM_CFG_SATA_POWER_EN);
>>> +     msleep(20);
>>> +     /* Disable PCIE SATA Controller reset */
>>> +     regmap_update_bits(priv->misc, SPEAR1340_PERIP1_SW_RST,
>>> +                        SPEAR1340_PERIP1_SW_RSATA, 0);
>>> +     msleep(20);
>>
>> Please add a comment for all delays added.
> 
> @Pratyush/Mohit: please let me know what to add here.
> 
>>> +#ifdef CONFIG_PM_SLEEP
>>> +static int spear1340_miphy_suspend(struct device *dev)
>>> +{
>>> +     struct spear1340_miphy_priv *priv = dev_get_drvdata(dev);
>>> +     int ret = 0;
>>> +
>>> +     if (priv->mode == SATA)
>>> +             ret = spear1340_miphy_sata_exit(priv);
>>
>> Shouldn't this be spear1340_miphy_init()?
>>> +
>>> +     return ret;
>>> +}
>>> +
>>> +static int spear1340_miphy_resume(struct device *dev)
>>> +{
>>> +     struct spear1340_miphy_priv *priv = dev_get_drvdata(dev);
>>> +     int ret = 0;
>>> +
>>> +     if (priv->mode == SATA)
>>> +             ret = spear1340_miphy_sata_init(priv);
>>
>> And here spear1340_miphy_exit()? Why only for sata phys?
> 
> @Mohit/Pratyush ??
> 
> Thanks Kishon for another round of review :)
>