arm/tegra: prepare pinmux code for multiple tegra variants

This patch modifies the pinmux code to be useable for multiple tegra variants.
Some tegra20 specific constants will be replaced by variables which will be
initialized to the appropriate value at runtime.

Signed-off-by: Peter De Schrijver <pdeschrijver@nvidia.com>
Acked-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Colin Cross <ccross@android.com>
Signed-off-by: Olof Johansson <olof@lixom.net>

1 files changed, 59 insertions, 46 deletions

diff --git a/arch/arm/mach-tegra/pinmux.c b/arch/arm/mach-tegra/pinmux.c
index 1d201650d7a4..45ebd8ceccca 100644
--- a/arch/arm/mach-tegra/pinmux.c
+++ b/arch/arm/mach-tegra/pinmux.c
@@ -21,6 +21,7 @@
 #include <linux/spinlock.h>
 #include <linux/io.h>
 #include <linux/platform_device.h>
+#include <linux/of_device.h>
 
 #include <mach/iomap.h>
 #include <mach/pinmux.h>
@@ -33,8 +34,10 @@
 #define SLWR(reg)	(((reg) >> 28) & 0x3)
 #define SLWF(reg)	(((reg) >> 30) & 0x3)
 
-static const struct tegra_pingroup_desc *const pingroups = tegra_soc_pingroups;
-static const struct tegra_drive_pingroup_desc *const drive_pingroups = tegra_soc_drive_pingroups;
+static const struct tegra_pingroup_desc *pingroups;
+static const struct tegra_drive_pingroup_desc *drive_pingroups;
+static int pingroup_max;
+static int drive_max;
 
 static char *tegra_mux_names[TEGRA_MAX_MUX] = {
 	[TEGRA_MUX_AHB_CLK] = "AHB_CLK",
@@ -116,9 +119,9 @@ static const char *tegra_slew_names[TEGRA_MAX_SLEW] = {
 
 static DEFINE_SPINLOCK(mux_lock);
 
-static const char *pingroup_name(enum tegra_pingroup pg)
+static const char *pingroup_name(int pg)
 {
-	if (pg < 0 || pg >=  TEGRA_MAX_PINGROUP)
+	if (pg < 0 || pg >=  pingroup_max)
 		return "<UNKNOWN>";
 
 	return pingroups[pg].name;
@@ -189,10 +192,10 @@ static int tegra_pinmux_set_func(const struct tegra_pingroup_config *config)
 	int i;
 	unsigned long reg;
 	unsigned long flags;
-	enum tegra_pingroup pg = config->pingroup;
+	int pg = config->pingroup;
 	enum tegra_mux_func func = config->func;
 
-	if (pg < 0 || pg >=  TEGRA_MAX_PINGROUP)
+	if (pg < 0 || pg >=  pingroup_max)
 		return -ERANGE;
 
 	if (pingroups[pg].mux_reg < 0)
@@ -230,13 +233,12 @@ static int tegra_pinmux_set_func(const struct tegra_pingroup_config *config)
 	return 0;
 }
 
-int tegra_pinmux_set_tristate(enum tegra_pingroup pg,
-	enum tegra_tristate tristate)
+int tegra_pinmux_set_tristate(int pg, enum tegra_tristate tristate)
 {
 	unsigned long reg;
 	unsigned long flags;
 
-	if (pg < 0 || pg >=  TEGRA_MAX_PINGROUP)
+	if (pg < 0 || pg >=  pingroup_max)
 		return -ERANGE;
 
 	if (pingroups[pg].tri_reg < 0)
@@ -255,13 +257,12 @@ int tegra_pinmux_set_tristate(enum tegra_pingroup pg,
 	return 0;
 }
 
-int tegra_pinmux_set_pullupdown(enum tegra_pingroup pg,
-	enum tegra_pullupdown pupd)
+int tegra_pinmux_set_pullupdown(int pg, enum tegra_pullupdown pupd)
 {
 	unsigned long reg;
 	unsigned long flags;
 
-	if (pg < 0 || pg >=  TEGRA_MAX_PINGROUP)
+	if (pg < 0 || pg >=  pingroup_max)
 		return -ERANGE;
 
 	if (pingroups[pg].pupd_reg < 0)
@@ -287,7 +288,7 @@ int tegra_pinmux_set_pullupdown(enum tegra_pingroup pg,
 
 static void tegra_pinmux_config_pingroup(const struct tegra_pingroup_config *config)
 {
-	enum tegra_pingroup pingroup = config->pingroup;
+	int pingroup = config->pingroup;
 	enum tegra_mux_func func     = config->func;
 	enum tegra_pullupdown pupd   = config->pupd;
 	enum tegra_tristate tristate = config->tristate;
@@ -323,9 +324,9 @@ void tegra_pinmux_config_table(const struct tegra_pingroup_config *config, int l
 		tegra_pinmux_config_pingroup(&config[i]);
 }
 
-static const char *drive_pinmux_name(enum tegra_drive_pingroup pg)
+static const char *drive_pinmux_name(int pg)
 {
-	if (pg < 0 || pg >=  TEGRA_MAX_DRIVE_PINGROUP)
+	if (pg < 0 || pg >=  drive_max)
 		return "<UNKNOWN>";
 
 	return drive_pingroups[pg].name;
@@ -352,12 +353,11 @@ static const char *slew_name(unsigned long val)
 	return tegra_slew_names[val];
 }
 
-static int tegra_drive_pinmux_set_hsm(enum tegra_drive_pingroup pg,
-	enum tegra_hsm hsm)
+static int tegra_drive_pinmux_set_hsm(int pg, enum tegra_hsm hsm)
 {
 	unsigned long flags;
 	u32 reg;
-	if (pg < 0 || pg >=  TEGRA_MAX_DRIVE_PINGROUP)
+	if (pg < 0 || pg >=  drive_max)
 		return -ERANGE;
 
 	if (hsm != TEGRA_HSM_ENABLE && hsm != TEGRA_HSM_DISABLE)
@@ -377,12 +377,11 @@ static int tegra_drive_pinmux_set_hsm(enum tegra_drive_pingroup pg,
 	return 0;
 }
 
-static int tegra_drive_pinmux_set_schmitt(enum tegra_drive_pingroup pg,
-	enum tegra_schmitt schmitt)
+static int tegra_drive_pinmux_set_schmitt(int pg, enum tegra_schmitt schmitt)
 {
 	unsigned long flags;
 	u32 reg;
-	if (pg < 0 || pg >=  TEGRA_MAX_DRIVE_PINGROUP)
+	if (pg < 0 || pg >=  drive_max)
 		return -ERANGE;
 
 	if (schmitt != TEGRA_SCHMITT_ENABLE && schmitt != TEGRA_SCHMITT_DISABLE)
@@ -402,12 +401,11 @@ static int tegra_drive_pinmux_set_schmitt(enum tegra_drive_pingroup pg,
 	return 0;
 }
 
-static int tegra_drive_pinmux_set_drive(enum tegra_drive_pingroup pg,
-	enum tegra_drive drive)
+static int tegra_drive_pinmux_set_drive(int pg, enum tegra_drive drive)
 {
 	unsigned long flags;
 	u32 reg;
-	if (pg < 0 || pg >=  TEGRA_MAX_DRIVE_PINGROUP)
+	if (pg < 0 || pg >=  drive_max)
 		return -ERANGE;
 
 	if (drive < 0 || drive >= TEGRA_MAX_DRIVE)
@@ -425,12 +423,12 @@ static int tegra_drive_pinmux_set_drive(enum tegra_drive_pingroup pg,
 	return 0;
 }
 
-static int tegra_drive_pinmux_set_pull_down(enum tegra_drive_pingroup pg,
+static int tegra_drive_pinmux_set_pull_down(int pg,
 	enum tegra_pull_strength pull_down)
 {
 	unsigned long flags;
 	u32 reg;
-	if (pg < 0 || pg >=  TEGRA_MAX_DRIVE_PINGROUP)
+	if (pg < 0 || pg >=  drive_max)
 		return -ERANGE;
 
 	if (pull_down < 0 || pull_down >= TEGRA_MAX_PULL)
@@ -448,12 +446,12 @@ static int tegra_drive_pinmux_set_pull_down(enum tegra_drive_pingroup pg,
 	return 0;
 }
 
-static int tegra_drive_pinmux_set_pull_up(enum tegra_drive_pingroup pg,
+static int tegra_drive_pinmux_set_pull_up(int pg,
 	enum tegra_pull_strength pull_up)
 {
 	unsigned long flags;
 	u32 reg;
-	if (pg < 0 || pg >=  TEGRA_MAX_DRIVE_PINGROUP)
+	if (pg < 0 || pg >=  drive_max)
 		return -ERANGE;
 
 	if (pull_up < 0 || pull_up >= TEGRA_MAX_PULL)
@@ -471,12 +469,12 @@ static int tegra_drive_pinmux_set_pull_up(enum tegra_drive_pingroup pg,
 	return 0;
 }
 
-static int tegra_drive_pinmux_set_slew_rising(enum tegra_drive_pingroup pg,
+static int tegra_drive_pinmux_set_slew_rising(int pg,
 	enum tegra_slew slew_rising)
 {
 	unsigned long flags;
 	u32 reg;
-	if (pg < 0 || pg >=  TEGRA_MAX_DRIVE_PINGROUP)
+	if (pg < 0 || pg >=  drive_max)
 		return -ERANGE;
 
 	if (slew_rising < 0 || slew_rising >= TEGRA_MAX_SLEW)
@@ -494,12 +492,12 @@ static int tegra_drive_pinmux_set_slew_rising(enum tegra_drive_pingroup pg,
 	return 0;
 }
 
-static int tegra_drive_pinmux_set_slew_falling(enum tegra_drive_pingroup pg,
+static int tegra_drive_pinmux_set_slew_falling(int pg,
 	enum tegra_slew slew_falling)
 {
 	unsigned long flags;
 	u32 reg;
-	if (pg < 0 || pg >=  TEGRA_MAX_DRIVE_PINGROUP)
+	if (pg < 0 || pg >=  drive_max)
 		return -ERANGE;
 
 	if (slew_falling < 0 || slew_falling >= TEGRA_MAX_SLEW)
@@ -517,7 +515,7 @@ static int tegra_drive_pinmux_set_slew_falling(enum tegra_drive_pingroup pg,
 	return 0;
 }
 
-static void tegra_drive_pinmux_config_pingroup(enum tegra_drive_pingroup pingroup,
+static void tegra_drive_pinmux_config_pingroup(int pingroup,
 					  enum tegra_hsm hsm,
 					  enum tegra_schmitt schmitt,
 					  enum tegra_drive drive,
@@ -596,7 +594,7 @@ void tegra_pinmux_set_safe_pinmux_table(const struct tegra_pingroup_config *conf
 	for (i = 0; i < len; i++) {
 		int err;
 		c = config[i];
-		if (c.pingroup < 0 || c.pingroup >= TEGRA_MAX_PINGROUP) {
+		if (c.pingroup < 0 || c.pingroup >= pingroup_max) {
 			WARN_ON(1);
 			continue;
 		}
@@ -617,7 +615,7 @@ void tegra_pinmux_config_pinmux_table(const struct tegra_pingroup_config *config
 	for (i = 0; i < len; i++) {
 		int err;
 		if (config[i].pingroup < 0 ||
-		    config[i].pingroup >= TEGRA_MAX_PINGROUP) {
+		    config[i].pingroup >= pingroup_max) {
 			WARN_ON(1);
 			continue;
 		}
@@ -635,7 +633,7 @@ void tegra_pinmux_config_tristate_table(const struct tegra_pingroup_config *conf
 {
 	int i;
 	int err;
-	enum tegra_pingroup pingroup;
+	int pingroup;
 
 	for (i = 0; i < len; i++) {
 		pingroup = config[i].pingroup;
@@ -654,7 +652,7 @@ void tegra_pinmux_config_pullupdown_table(const struct tegra_pingroup_config *co
 {
 	int i;
 	int err;
-	enum tegra_pingroup pingroup;
+	int pingroup;
 
 	for (i = 0; i < len; i++) {
 		pingroup = config[i].pingroup;
@@ -668,11 +666,31 @@ void tegra_pinmux_config_pullupdown_table(const struct tegra_pingroup_config *co
 	}
 }
 
+static struct of_device_id tegra_pinmux_of_match[] __devinitdata = {
+	{ .compatible = "nvidia,tegra20-pinmux", tegra20_pinmux_init },
+	{ },
+};
+
 static int __devinit tegra_pinmux_probe(struct platform_device *pdev)
 {
 	struct resource *res;
 	int i;
 	int config_bad = 0;
+	const struct of_device_id *match;
+
+	match = of_match_device(tegra_pinmux_of_match, &pdev->dev);
+
+	if (match)
+		((pinmux_init)(match->data))(&pingroups, &pingroup_max,
+			&drive_pingroups, &drive_max);
+#ifdef CONFIG_ARCH_TEGRA_2x_SOC
+	else
+		/* no device tree available, so we must be on tegra20 */
+		tegra20_pinmux_init(&pingroups, &pingroup_max,
+					&drive_pingroups, &drive_max);
+#else
+	pr_warn("non Tegra20 platform requires pinmux devicetree node\n");
+#endif
 
 	for (i = 0; ; i++) {
 		res = platform_get_resource(pdev, IORESOURCE_MEM, i);
@@ -681,7 +699,7 @@ static int __devinit tegra_pinmux_probe(struct platform_device *pdev)
 	}
 	nbanks = i;
 
-	for (i = 0; i < TEGRA_MAX_PINGROUP; i++) {
+	for (i = 0; i < pingroup_max; i++) {
 		if (pingroups[i].tri_bank >= nbanks) {
 			dev_err(&pdev->dev, "pingroup %d: bad tri_bank\n", i);
 			config_bad = 1;
@@ -698,7 +716,7 @@ static int __devinit tegra_pinmux_probe(struct platform_device *pdev)
 		}
 	}
 
-	for (i = 0; i < TEGRA_MAX_DRIVE_PINGROUP; i++) {
+	for (i = 0; i < drive_max; i++) {
 		if (drive_pingroups[i].reg_bank >= nbanks) {
 			dev_err(&pdev->dev,
 				"drive pingroup %d: bad reg_bank\n", i);
@@ -741,11 +759,6 @@ static int __devinit tegra_pinmux_probe(struct platform_device *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",
@@ -779,7 +792,7 @@ static int dbg_pinmux_show(struct seq_file *s, void *unused)
 	int i;
 	int len;
 
-	for (i = 0; i < TEGRA_MAX_PINGROUP; i++) {
+	for (i = 0; i < pingroup_max; i++) {
 		unsigned long reg;
 		unsigned long tri;
 		unsigned long mux;
@@ -850,7 +863,7 @@ static int dbg_drive_pinmux_show(struct seq_file *s, void *unused)
 	int i;
 	int len;
 
-	for (i = 0; i < TEGRA_MAX_DRIVE_PINGROUP; i++) {
+	for (i = 0; i < drive_max; i++) {
 		u32 reg;
 
 		seq_printf(s, "\t{TEGRA_DRIVE_PINGROUP_%s",