From 318ff8011f18708d0b3e1f3ffc3359a77dfca29b Mon Sep 17 00:00:00 2001
From: Stephen Warren <swarren@nvidia.com>
Date: Fri, 16 Dec 2011 15:12:32 -0700
Subject: [PATCH] --- yaml --- r: 281722 b: refs/heads/master c:
 a58116f331fd30462b4a7372725e090e1a7d0eb7 h: refs/heads/master v: v3

---
 [refs]                                   |  2 +-
 trunk/arch/arm/mach-tegra/board-dt.c     | 14 ++---
 trunk/arch/arm/mach-tegra/board-pinmux.c | 72 ++++++++++++++++++++----
 3 files changed, 70 insertions(+), 18 deletions(-)

diff --git a/[refs] b/[refs]
index f76cec80363e..d98f85f707ff 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 54862bf00968427cf8f7ffcb6dacf03161eae862
+refs/heads/master: a58116f331fd30462b4a7372725e090e1a7d0eb7
diff --git a/trunk/arch/arm/mach-tegra/board-dt.c b/trunk/arch/arm/mach-tegra/board-dt.c
index 96f4df598238..909065f62e38 100644
--- a/trunk/arch/arm/mach-tegra/board-dt.c
+++ b/trunk/arch/arm/mach-tegra/board-dt.c
@@ -103,13 +103,6 @@ static void __init tegra_dt_init(void)
 
 	tegra_clk_init_from_table(tegra_dt_clk_init_table);
 
-	/*
-	 * Finished with the static registrations now; fill in the missing
-	 * devices
-	 */
-	of_platform_populate(NULL, tegra_dt_match_table,
-				tegra20_auxdata_lookup, NULL);
-
 	for (i = 0; i < ARRAY_SIZE(pinmux_configs); i++) {
 		if (of_machine_is_compatible(pinmux_configs[i].machine)) {
 			pinmux_configs[i].init();
@@ -119,6 +112,13 @@ static void __init tegra_dt_init(void)
 
 	WARN(i == ARRAY_SIZE(pinmux_configs),
 		"Unknown platform! Pinmuxing not initialized\n");
+
+	/*
+	 * Finished with the static registrations now; fill in the missing
+	 * devices
+	 */
+	of_platform_populate(NULL, tegra_dt_match_table,
+				tegra20_auxdata_lookup, NULL);
 }
 
 static const char * tegra_dt_board_compat[] = {
diff --git a/trunk/arch/arm/mach-tegra/board-pinmux.c b/trunk/arch/arm/mach-tegra/board-pinmux.c
index 103ef65ca62a..adc3efe979b3 100644
--- a/trunk/arch/arm/mach-tegra/board-pinmux.c
+++ b/trunk/arch/arm/mach-tegra/board-pinmux.c
@@ -12,7 +12,11 @@
  *
  */
 
+#include <linux/device.h>
+#include <linux/kernel.h>
+#include <linux/notifier.h>
 #include <linux/of.h>
+#include <linux/string.h>
 
 #include <mach/gpio-tegra.h>
 #include <mach/pinmux.h>
@@ -20,19 +24,23 @@
 #include "board-pinmux.h"
 #include "devices.h"
 
-static struct platform_device *devices[] = {
-	&tegra_gpio_device,
-	&tegra_pinmux_device,
-};
+struct tegra_board_pinmux_conf *confs[2];
 
-void tegra_board_pinmux_init(struct tegra_board_pinmux_conf *conf_a,
-			     struct tegra_board_pinmux_conf *conf_b)
+static void tegra_board_pinmux_setup_gpios(void)
 {
-	struct tegra_board_pinmux_conf *confs[] = {conf_a, conf_b};
 	int i;
 
-	if (of_machine_is_compatible("nvidia,tegra20"))
-		platform_add_devices(devices, ARRAY_SIZE(devices));
+	for (i = 0; i < ARRAY_SIZE(confs); i++) {
+		if (!confs[i])
+			continue;
+
+		tegra_gpio_config(confs[i]->gpios, confs[i]->gpio_count);
+	}
+}
+
+static void tegra_board_pinmux_setup_pinmux(void)
+{
+	int i;
 
 	for (i = 0; i < ARRAY_SIZE(confs); i++) {
 		if (!confs[i])
@@ -43,10 +51,54 @@ void tegra_board_pinmux_init(struct tegra_board_pinmux_conf *conf_a,
 		if (confs[i]->drives)
 			tegra_drive_pinmux_config_table(confs[i]->drives,
 							confs[i]->drive_count);
+	}
+}
 
-		tegra_gpio_config(confs[i]->gpios, confs[i]->gpio_count);
+static int tegra_board_pinmux_bus_notify(struct notifier_block *nb,
+					 unsigned long event, void *vdev)
+{
+	static bool had_gpio;
+	static bool had_pinmux;
+
+	struct device *dev = vdev;
+	const char *devname;
+
+	if (event != BUS_NOTIFY_BOUND_DRIVER)
+		return NOTIFY_DONE;
+
+	devname = dev_name(dev);
+
+	if (!had_gpio && !strcmp(devname, GPIO_DEV)) {
+		tegra_board_pinmux_setup_gpios();
+		had_gpio = true;
+	} else if (!had_pinmux && !strcmp(devname, PINMUX_DEV)) {
+		tegra_board_pinmux_setup_pinmux();
+		had_pinmux = true;
 	}
 
+	if (had_gpio && had_pinmux)
+		return NOTIFY_STOP_MASK;
+	else
+		return NOTIFY_DONE;
+}
+
+static struct notifier_block nb = {
+	.notifier_call = tegra_board_pinmux_bus_notify,
+};
+
+static struct platform_device *devices[] = {
+	&tegra_gpio_device,
+	&tegra_pinmux_device,
+};
+
+void tegra_board_pinmux_init(struct tegra_board_pinmux_conf *conf_a,
+			     struct tegra_board_pinmux_conf *conf_b)
+{
+	confs[0] = conf_a;
+	confs[1] = conf_b;
+
+	bus_register_notifier(&platform_bus_type, &nb);
+
 	if (!of_machine_is_compatible("nvidia,tegra20"))
 		platform_add_devices(devices, ARRAY_SIZE(devices));
 }