pinctrl: tegra: Display pin function in pinconf-groups

The function that a pin is muxed to can be read from the top-level pinctrl-maps debugfs file. However, this only reflects the values that were specified in device tree, so they will only show deviations from the hardware default setting. Display the current pinmux setting in the per-controller pinconf-groups debugfs file along with the rest of the per-pin configuration settings. Signed-off-by: Thierry Reding <[email protected]> Tested-by: Luca Ceresoli <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Linus Walleij <[email protected]>
lyw19b · Nov 13, 2023 · bf800ca · bf800ca
1 parent b85ea95
commit bf800ca
Showing 1 changed file with 8 additions and 0 deletions.
diff --git a/drivers/pinctrl/tegra/pinctrl-tegra.c b/drivers/pinctrl/tegra/pinctrl-tegra.c
@@ -636,6 +636,14 @@ static void tegra_pinconf_group_dbg_show(struct pinctrl_dev *pctldev,
 		seq_printf(s, "\n\t%s=%u",
 			   strip_prefix(cfg_params[i].property), val);
 	}
+
+	if (g->mux_reg >= 0) {
+		/* read pinmux function and dump to seq_file */
+		val = pmx_readl(pmx, g->mux_bank, g->mux_reg);
+		val = g->funcs[(val >> g->mux_bit) & 0x3];
+
+		seq_printf(s, "\n\tfunction=%s", pmx->functions[val].name);
+	}
 }
 
 static void tegra_pinconf_config_dbg_show(struct pinctrl_dev *pctldev,