On 3/21/24 1:40 PM, Sumit Garg wrote:
On Thu, 14 Mar 2024 at 09:46, Marek Vasut <ma...@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 ?
