Messages in this thread Patch in this message | | | From | Sean Anderson <> | Subject | [PATCH 3/3] phy: zynqmp: Add debugfs support | Date | Mon, 22 Apr 2024 14:58:03 -0400 |
| |
Add support for printing some basic status information to debugfs. This is helpful when debugging phy consumers to make sure they are configuring the phy appropriately.
Signed-off-by: Sean Anderson <sean.anderson@linux.dev> ---
drivers/phy/xilinx/phy-zynqmp.c | 54 +++++++++++++++++++++++++++++++++ 1 file changed, 54 insertions(+)
diff --git a/drivers/phy/xilinx/phy-zynqmp.c b/drivers/phy/xilinx/phy-zynqmp.c index 08c88dcd7799..e2e86943e9f3 100644 --- a/drivers/phy/xilinx/phy-zynqmp.c +++ b/drivers/phy/xilinx/phy-zynqmp.c @@ -13,6 +13,7 @@ */ #include <linux/clk.h> +#include <linux/debugfs.h> #include <linux/delay.h> #include <linux/io.h> #include <linux/kernel.h> @@ -122,6 +123,15 @@ #define ICM_PROTOCOL_DP 0x4 #define ICM_PROTOCOL_SGMII 0x5 +static const char *const xpsgtr_icm_str[] = { + [ICM_PROTOCOL_PD] = "powered down", + [ICM_PROTOCOL_PCIE] = "PCIe", + [ICM_PROTOCOL_SATA] = "SATA", + [ICM_PROTOCOL_USB] = "USB", + [ICM_PROTOCOL_DP] = "DisplayPort", + [ICM_PROTOCOL_SGMII] = "SGMII", +}; + /* Test Mode common reset control parameters */ #define TM_CMN_RST 0x10018 #define TM_CMN_RST_EN 0x1 @@ -768,6 +778,48 @@ static struct phy *xpsgtr_xlate(struct device *dev, return ERR_PTR(-EINVAL); } +/* + * DebugFS + */ + +static int xpsgtr_status_read(struct seq_file *seq, void *data) +{ + struct xpsgtr_phy *gtr_phy = seq->private; + struct clk *clk; + u32 pll_status; + + mutex_lock(>r_phy->phy->mutex); + pll_status = xpsgtr_read_phy(gtr_phy, L0_PLL_STATUS_READ_1); + clk = gtr_phy->dev->clk[gtr_phy->refclk]; + + seq_printf(seq, "Lane: %u\n", gtr_phy->lane); + seq_printf(seq, "Protocol: %s\n", + xpsgtr_icm_str[gtr_phy->protocol]); + seq_printf(seq, "Instance: %u\n", gtr_phy->instance); + seq_printf(seq, "Reference clock: %u (%pC)\n", gtr_phy->refclk, clk); + seq_printf(seq, "Reference rate: %lu\n", clk_get_rate(clk)); + seq_printf(seq, "PLL locked: %s\n", + pll_status & PLL_STATUS_LOCKED ? "yes" : "no"); + + mutex_unlock(>r_phy->phy->mutex); + return 0; +} + +static int xpsgtr_status_open(struct inode *inode, struct file *f) +{ + struct xpsgtr_phy *gtr_phy = inode->i_private; + + return single_open(f, xpsgtr_status_read, gtr_phy); +} + +static const struct file_operations xpsgtr_status_ops = { + .owner = THIS_MODULE, + .open = xpsgtr_status_open, + .release = single_release, + .read = seq_read, + .llseek = seq_lseek +}; + /* * Power Management */ @@ -917,6 +969,8 @@ static int xpsgtr_probe(struct platform_device *pdev) gtr_phy->phy = phy; phy_set_drvdata(phy, gtr_phy); + debugfs_create_file("status", 0444, phy->debugfs, gtr_phy, + &xpsgtr_status_ops); } /* Register the PHY provider. */ -- 2.35.1.1320.gc452695387.dirty
| |