Signed-off-by: Stephen Warren <swarren@xxxxxxxxxx>
---
arch/arm/mach-tegra/pinmux.c | 115 ++++++++++++++++++++++++++++++++++++++++++
1 files changed, 115 insertions(+), 0 deletions(-)
diff --git a/arch/arm/mach-tegra/pinmux.c b/arch/arm/mach-tegra/pinmux.c
index 05fa1a3..33246c2 100644
--- a/arch/arm/mach-tegra/pinmux.c
+++ b/arch/arm/mach-tegra/pinmux.c
@@ -20,6 +20,7 @@
#include <linux/errno.h>
#include <linux/spinlock.h>
#include <linux/io.h>
+#include <linux/of.h>
#include <linux/platform_device.h>
#include <mach/iomap.h>
@@ -147,6 +148,41 @@ static const char *func_name(enum tegra_mux_func func)
return tegra_mux_names[func];
}
+#ifdef CONFIG_OF
+static int func_enum(const char *name, enum tegra_mux_func *func_out)
+{
+ int func;
+
+ if (!strcmp(name, "RSVD1")) {
+ *func_out = TEGRA_MUX_RSVD1;
+ return 0;
+ }
+ if (!strcmp(name, "RSVD2")) {
+ *func_out = TEGRA_MUX_RSVD2;
+ return 0;
+ }
+ if (!strcmp(name, "RSVD3")) {
+ *func_out = TEGRA_MUX_RSVD3;
+ return 0;
+ }
+ if (!strcmp(name, "RSVD4")) {
+ *func_out = TEGRA_MUX_RSVD4;
+ return 0;
+ }
+ if (!strcmp(name, "NONE")) {
+ *func_out = TEGRA_MUX_NONE;
+ return 0;
+ }
+
+ for (func = 0; func < TEGRA_MAX_MUX; func++)
+ if (!strcmp(name, tegra_mux_names[func])) {
+ *func_out = func;
+ return 0;
+ }
+
+ return -EINVAL;
+}
+#endif
static const char *tri_name(unsigned long val)
{
@@ -666,15 +702,94 @@ void tegra_pinmux_config_pullupdown_table(const struct tegra_pingroup_config *co
}
}
+#ifdef CONFIG_OF
+static void __init tegra_pinmux_probe_dt(struct platform_device *pdev)
+{
+ int pg;
+
+ for (pg = 0; pg < TEGRA_MAX_PINGROUP; pg++) {
+ const char *pg_name = pingroup_name(pg);
+ struct tegra_pingroup_config config;
+ struct device_node *pg_node;
+ int ret;
+ const char *s;
+
+ pg_node = of_find_child_node_by_name(pdev->dev.of_node,
+ pg_name);
+ if (pg_node == NULL)
+ continue;
+
+ config.pingroup = pg;
+
+ ret = of_property_read_string(pg_node, "nvidia,function", &s);
+ if (ret < 0) {
+ dev_err(&pdev->dev,
+ "%s: Missing property nvidia,function\n",
+ pg_name);
+ continue;
+ }
+ ret = func_enum(s, &config.func);
+ if (ret < 0) {
+ dev_err(&pdev->dev,
+ "%s: Invalid nvidia,function value %s\n",
+ pg_name, s);
+ continue;
+ }
+
+ ret = of_property_read_string(pg_node, "nvidia,pull", &s);
+ if (ret >= 0) {
+ if (!strcmp(s, "up"))
+ config.pupd = TEGRA_PUPD_PULL_UP;
+ else if (!strcmp(s, "down"))
+ config.pupd = TEGRA_PUPD_PULL_DOWN;
+ else if (!strcmp(s, "normal"))
+ config.pupd = TEGRA_PUPD_NORMAL;
+ else {
+ dev_err(&pdev->dev,
+ "%s: Invalid nvidia,pull value %s\n",
+ pg_name, s);
+ continue;
+ }
+ } else
+ config.pupd = TEGRA_PUPD_NORMAL;
+
+ if (of_find_property(pg_node, "nvidia,tristate", NULL))
+ config.tristate = TEGRA_TRI_TRISTATE;
+ else
+ config.tristate = TEGRA_TRI_NORMAL;
+
+ dev_err(&pdev->dev, "%s: func %d (%s) pull %d tri %d\n",
+ pg_name, config.func, func_name(config.func),
+ config.pupd, config.tristate);
+
+ tegra_pinmux_config_pingroup(&config);
+
+ of_node_put(pg_node);
+ }
+}
+#else
+static inline void __init tegra_pinmux_probe_dt(struct platform_device *pdev)
+{
+}
+#endif
+
static int __init tegra_pinmux_probe(struct platform_device *pdev)
{
+ tegra_pinmux_probe_dt(pdev);
+
return 0;
}
+static struct of_device_id tegra_pinmux_of_match[] __devinitdata = {
+ { .compatible = "nvidia,tegra20-pinmux", },
+ { },
+};
+
static struct platform_driver tegra_pinmux_driver = {
.driver = {
.name = "tegra-pinmux",
.owner = THIS_MODULE,
+ .of_match_table = tegra_pinmux_of_match,
},
.probe = tegra_pinmux_probe,
};
--
1.7.0.4
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