Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
phy: zynqmp: Add debugfs support
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>
Link: https://lore.kernel.org/r/20240628205540.3098010-6-sean.anderson@linux.dev
Signed-off-by: Vinod Koul <vkoul@kernel.org>
authored by
Sean Anderson
and committed by
Vinod Koul
04490b62
d79c6840
+40
+40
drivers/phy/xilinx/phy-zynqmp.c
+40
drivers/phy/xilinx/phy-zynqmp.c
···
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*/
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#include <linux/clk.h>
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#include <linux/debugfs.h>
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#include <linux/delay.h>
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#include <linux/io.h>
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#include <linux/kernel.h>
···
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#define ICM_PROTOCOL_USB 0x3
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#define ICM_PROTOCOL_DP 0x4
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#define ICM_PROTOCOL_SGMII 0x5
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static const char *const xpsgtr_icm_str[] = {
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[ICM_PROTOCOL_PD] = "none",
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[ICM_PROTOCOL_PCIE] = "PCIe",
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[ICM_PROTOCOL_SATA] = "SATA",
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[ICM_PROTOCOL_USB] = "USB",
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[ICM_PROTOCOL_DP] = "DisplayPort",
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[ICM_PROTOCOL_SGMII] = "SGMII",
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};
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/* Test Mode common reset control parameters */
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#define TM_CMN_RST 0x10018
···
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}
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/*
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* DebugFS
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*/
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static int xpsgtr_status_read(struct seq_file *seq, void *data)
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{
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struct device *dev = seq->private;
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struct xpsgtr_phy *gtr_phy = dev_get_drvdata(dev);
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struct clk *clk;
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u32 pll_status;
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mutex_lock(>r_phy->phy->mutex);
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pll_status = xpsgtr_read_phy(gtr_phy, L0_PLL_STATUS_READ_1);
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clk = gtr_phy->dev->clk[gtr_phy->refclk];
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seq_printf(seq, "Lane: %u\n", gtr_phy->lane);
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seq_printf(seq, "Protocol: %s\n",
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xpsgtr_icm_str[gtr_phy->protocol]);
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seq_printf(seq, "Instance: %u\n", gtr_phy->instance);
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seq_printf(seq, "Reference clock: %u (%pC)\n", gtr_phy->refclk, clk);
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seq_printf(seq, "Reference rate: %lu\n", clk_get_rate(clk));
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seq_printf(seq, "PLL locked: %s\n",
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pll_status & PLL_STATUS_LOCKED ? "yes" : "no");
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mutex_unlock(>r_phy->phy->mutex);
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return 0;
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}
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/*
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* Power Management
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*/
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···
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gtr_phy->phy = phy;
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phy_set_drvdata(phy, gtr_phy);
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debugfs_create_devm_seqfile(&phy->dev, "status", phy->debugfs,
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xpsgtr_status_read);
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}
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/* Register the PHY provider. */