[PATCH v3 07/11] phy: phy-imx8m-pcie: Add support for i.MX8M{M/P} PCIe PHY

[Marek Vasut]

On 3/21/24 1:40 PM, Sumit Garg wrote:
> On Thu, 14 Mar 2024 at 09:46, Marek Vasut <marex at denx.de> wrote:
>>
>> On 3/12/24 8:03 AM, Sumit Garg wrote:
>>> Add initial support for i.MX8M{M/P} PCIe PHY. On i.MX8M{M/P} SoCs PCIe
>>> PHY initialization moved to this standalone PHY driver.
>>>
>>> Inspired from counterpart Linux kernel v6.8-rc3 driver:
>>> drivers/phy/freescale/phy-fsl-imx8m-pcie.c. Use last Linux kernel driver
>>> reference commit 7559e7572c03 ("phy: Explicitly include correct DT
>>> includes").
>>
>> [...]
>>
>>> +static int imx8_pcie_phy_probe(struct udevice *dev)
>>> +{
>>> +     struct imx8_pcie_phy *imx8_phy = dev_get_priv(dev);
>>> +     ofnode gpr;
>>> +     int ret = 0;
>>> +
>>> +     imx8_phy->drvdata = (void *)dev_get_driver_data(dev);
>>> +     imx8_phy->base = dev_read_addr(dev);
>>> +     if (!imx8_phy->base)
>>> +             return -EINVAL;
>>> +
>>> +     /* get PHY refclk pad mode */
>>> +     dev_read_u32(dev, "fsl,refclk-pad-mode", &imx8_phy->refclk_pad_mode);
>>> +
>>> +     imx8_phy->tx_deemph_gen1 = dev_read_u32_default(dev,
>>> +                                                     "fsl,tx-deemph-gen1",
>>> +                                                     0);
>>> +     imx8_phy->tx_deemph_gen2 = dev_read_u32_default(dev,
>>> +                                                     "fsl,tx-deemph-gen2",
>>> +                                                     0);
>>> +     imx8_phy->clkreq_unused = dev_read_bool(dev, "fsl,clkreq-unsupported");
>>> +
>>> +     /* Grab GPR config register range */
>>> +     gpr = ofnode_by_compatible(ofnode_null(), imx8_phy->drvdata->gpr);
>>> +     if (ofnode_equal(gpr, ofnode_null())) {
>>> +             dev_err(dev, "unable to find GPR node\n");
>>> +             return -ENODEV;
>>> +     }
>>> +
>>> +     imx8_phy->iomuxc_gpr = syscon_node_to_regmap(gpr);
>>> +     if (IS_ERR(imx8_phy->iomuxc_gpr)) {
>>> +             dev_err(dev, "unable to find iomuxc registers\n");
>>> +             return PTR_ERR(imx8_phy->iomuxc_gpr);
>>> +     }
>>
>> syscon_regmap_lookup_by_compatible() should simplify these two steps ^ .
>>
> 
> After a close look, that API isn't supported by U-Boot yet. So I will
> keep the existing implementation with your review tag. I hope that's
> fine with you.

Oh, uh, I had a local patch from previous round of PCIe experiments, I 
just sent it out, you are on CC. Can you do a follow up fix once this 
series V4 is in ?