4 files changed, 139 insertions, 32 deletions

diff --git a/drivers/i2c/busses/i2c-imx.c b/drivers/i2c/busses/i2c-imx.c
index 8d6b504d65c4..370031ac8200 100644
--- a/drivers/i2c/busses/i2c-imx.c
+++ b/drivers/i2c/busses/i2c-imx.c
@@ -53,7 +53,6 @@
 #include <linux/of_i2c.h>
 #include <linux/pinctrl/consumer.h>
 
-#include <mach/irqs.h>
 #include <mach/hardware.h>
 #include <mach/i2c.h>
 
diff --git a/drivers/i2c/busses/i2c-nomadik.c b/drivers/i2c/busses/i2c-nomadik.c
index 5267ab93d550..a92440dbef07 100644
--- a/drivers/i2c/busses/i2c-nomadik.c
+++ b/drivers/i2c/busses/i2c-nomadik.c
@@ -965,8 +965,7 @@ static int __devinit nmk_i2c_probe(struct platform_device *pdev)
 	adap->owner	= THIS_MODULE;
 	adap->class	= I2C_CLASS_HWMON | I2C_CLASS_SPD;
 	adap->algo	= &nmk_i2c_algo;
-	adap->timeout	= pdata->timeout ? msecs_to_jiffies(pdata->timeout) :
-		msecs_to_jiffies(20000);
+	adap->timeout	= msecs_to_jiffies(pdata->timeout);
 	snprintf(adap->name, sizeof(adap->name),
 		 "Nomadik I2C%d at %lx", pdev->id, (unsigned long)res->start);
 
diff --git a/drivers/i2c/busses/i2c-powermac.c b/drivers/i2c/busses/i2c-powermac.c
index 31c47e18d83c..5285f8565de4 100644
--- a/drivers/i2c/busses/i2c-powermac.c
+++ b/drivers/i2c/busses/i2c-powermac.c
@@ -227,28 +227,138 @@ static int __devexit i2c_powermac_remove(struct platform_device *dev)
 	return 0;
 }
 
+static u32 __devinit i2c_powermac_get_addr(struct i2c_adapter *adap,
+					   struct pmac_i2c_bus *bus,
+					   struct device_node *node)
+{
+	const __be32 *prop;
+	int len;
+
+	/* First check for valid "reg" */
+	prop = of_get_property(node, "reg", &len);
+	if (prop && (len >= sizeof(int)))
+		return (be32_to_cpup(prop) & 0xff) >> 1;
+
+	/* Then check old-style "i2c-address" */
+	prop = of_get_property(node, "i2c-address", &len);
+	if (prop && (len >= sizeof(int)))
+		return (be32_to_cpup(prop) & 0xff) >> 1;
+
+	/* Now handle some devices with missing "reg" properties */
+	if (!strcmp(node->name, "cereal"))
+		return 0x60;
+	else if (!strcmp(node->name, "deq"))
+		return 0x34;
+
+	dev_warn(&adap->dev, "No i2c address for %s\n", node->full_name);
+
+	return 0xffffffff;
+}
+
+static void __devinit i2c_powermac_create_one(struct i2c_adapter *adap,
+					      const char *type,
+					      u32 addr)
+{
+	struct i2c_board_info info = {};
+	struct i2c_client *newdev;
+
+	strncpy(info.type, type, sizeof(info.type));
+	info.addr = addr;
+	newdev = i2c_new_device(adap, &info);
+	if (!newdev)
+		dev_err(&adap->dev,
+			"i2c-powermac: Failure to register missing %s\n",
+			type);
+}
+
+static void __devinit i2c_powermac_add_missing(struct i2c_adapter *adap,
+					       struct pmac_i2c_bus *bus,
+					       bool found_onyx)
+{
+	struct device_node *busnode = pmac_i2c_get_bus_node(bus);
+	int rc;
+
+	/* Check for the onyx audio codec */
+#define ONYX_REG_CONTROL		67
+	if (of_device_is_compatible(busnode, "k2-i2c") && !found_onyx) {
+		union i2c_smbus_data data;
+
+		rc = i2c_smbus_xfer(adap, 0x46, 0, I2C_SMBUS_READ,
+				    ONYX_REG_CONTROL, I2C_SMBUS_BYTE_DATA,
+				    &data);
+		if (rc >= 0)
+			i2c_powermac_create_one(adap, "MAC,pcm3052", 0x46);
+
+		rc = i2c_smbus_xfer(adap, 0x47, 0, I2C_SMBUS_READ,
+				    ONYX_REG_CONTROL, I2C_SMBUS_BYTE_DATA,
+				    &data);
+		if (rc >= 0)
+			i2c_powermac_create_one(adap, "MAC,pcm3052", 0x47);
+	}
+}
+
+static bool __devinit i2c_powermac_get_type(struct i2c_adapter *adap,
+					    struct device_node *node,
+					    u32 addr, char *type, int type_size)
+{
+	char tmp[16];
+
+	/* Note: we to _NOT_ want the standard
+	 * i2c drivers to match with any of our powermac stuff
+	 * unless they have been specifically modified to handle
+	 * it on a case by case basis. For example, for thermal
+	 * control, things like lm75 etc... shall match with their
+	 * corresponding windfarm drivers, _NOT_ the generic ones,
+	 * so we force a prefix of AAPL, onto the modalias to
+	 * make that happen
+	 */
+
+	/* First try proper modalias */
+	if (of_modalias_node(node, tmp, sizeof(tmp)) >= 0) {
+		snprintf(type, type_size, "MAC,%s", tmp);
+		return true;
+	}
+
+	/* Now look for known workarounds */
+	if (!strcmp(node->name, "deq")) {
+		/* Apple uses address 0x34 for TAS3001 and 0x35 for TAS3004 */
+		if (addr == 0x34) {
+			snprintf(type, type_size, "MAC,tas3001");
+			return true;
+		} else if (addr == 0x35) {
+			snprintf(type, type_size, "MAC,tas3004");
+			return true;
+		}
+	}
+
+	dev_err(&adap->dev, "i2c-powermac: modalias failure"
+		" on %s\n", node->full_name);
+	return false;
+}
+
 static void __devinit i2c_powermac_register_devices(struct i2c_adapter *adap,
 						    struct pmac_i2c_bus *bus)
 {
 	struct i2c_client *newdev;
 	struct device_node *node;
+	bool found_onyx = 0;
+
+	/*
+	 * In some cases we end up with the via-pmu node itself, in this
+	 * case we skip this function completely as the device-tree will
+	 * not contain anything useful.
+	 */
+	if (!strcmp(adap->dev.of_node->name, "via-pmu"))
+		return;
 
 	for_each_child_of_node(adap->dev.of_node, node) {
 		struct i2c_board_info info = {};
-		struct dev_archdata dev_ad = {};
-		const __be32 *reg;
-		char tmp[16];
 		u32 addr;
-		int len;
 
 		/* Get address & channel */
-		reg = of_get_property(node, "reg", &len);
-		if (!reg || (len < sizeof(int))) {
-			dev_err(&adap->dev, "i2c-powermac: invalid reg on %s\n",
-				node->full_name);
+		addr = i2c_powermac_get_addr(adap, bus, node);
+		if (addr == 0xffffffff)
 			continue;
-		}
-		addr = be32_to_cpup(reg);
 
 		/* Multibus setup, check channel */
 		if (!pmac_i2c_match_adapter(node, adap))
@@ -257,27 +367,23 @@ static void __devinit i2c_powermac_register_devices(struct i2c_adapter *adap,
 		dev_dbg(&adap->dev, "i2c-powermac: register %s\n",
 			node->full_name);
 
-		/* Make up a modalias. Note: we to _NOT_ want the standard
-		 * i2c drivers to match with any of our powermac stuff
-		 * unless they have been specifically modified to handle
-		 * it on a case by case basis. For example, for thermal
-		 * control, things like lm75 etc... shall match with their
-		 * corresponding windfarm drivers, _NOT_ the generic ones,
-		 * so we force a prefix of AAPL, onto the modalias to
-		 * make that happen
+		/*
+		 * Keep track of some device existence to handle
+		 * workarounds later.
 		 */
-		if (of_modalias_node(node, tmp, sizeof(tmp)) < 0) {
-			dev_err(&adap->dev, "i2c-powermac: modalias failure"
-				" on %s\n", node->full_name);
+		if (of_device_is_compatible(node, "pcm3052"))
+			found_onyx = true;
+
+		/* Make up a modalias */
+		if (!i2c_powermac_get_type(adap, node, addr,
+					   info.type, sizeof(info.type))) {
 			continue;
 		}
-		snprintf(info.type, sizeof(info.type), "MAC,%s", tmp);
 
 		/* Fill out the rest of the info structure */
-		info.addr = (addr & 0xff) >> 1;
+		info.addr = addr;
 		info.irq = irq_of_parse_and_map(node, 0);
 		info.of_node = of_node_get(node);
-		info.archdata = &dev_ad;
 
 		newdev = i2c_new_device(adap, &info);
 		if (!newdev) {
@@ -292,6 +398,9 @@ static void __devinit i2c_powermac_register_devices(struct i2c_adapter *adap,
 			continue;
 		}
 	}
+
+	/* Additional workarounds */
+	i2c_powermac_add_missing(adap, bus, found_onyx);
 }
 
 static int __devinit i2c_powermac_probe(struct platform_device *dev)
diff --git a/drivers/i2c/busses/i2c-tegra.c b/drivers/i2c/busses/i2c-tegra.c
index 8b2e555a9563..3da7ee3eb505 100644
--- a/drivers/i2c/busses/i2c-tegra.c
+++ b/drivers/i2c/busses/i2c-tegra.c
@@ -341,7 +341,7 @@ static int tegra_i2c_init(struct tegra_i2c_dev *i2c_dev)
 	u32 val;
 	int err = 0;
 
-	clk_enable(i2c_dev->clk);
+	clk_prepare_enable(i2c_dev->clk);
 
 	tegra_periph_reset_assert(i2c_dev->clk);
 	udelay(2);
@@ -372,7 +372,7 @@ static int tegra_i2c_init(struct tegra_i2c_dev *i2c_dev)
 	if (tegra_i2c_flush_fifos(i2c_dev))
 		err = -ETIMEDOUT;
 
-	clk_disable(i2c_dev->clk);
+	clk_disable_unprepare(i2c_dev->clk);
 
 	if (i2c_dev->irq_disabled) {
 		i2c_dev->irq_disabled = 0;
@@ -546,14 +546,14 @@ static int tegra_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[],
 	if (i2c_dev->is_suspended)
 		return -EBUSY;
 
-	clk_enable(i2c_dev->clk);
+	clk_prepare_enable(i2c_dev->clk);
 	for (i = 0; i < num; i++) {
 		int stop = (i == (num - 1)) ? 1  : 0;
 		ret = tegra_i2c_xfer_msg(i2c_dev, &msgs[i], stop);
 		if (ret)
 			break;
 	}
-	clk_disable(i2c_dev->clk);
+	clk_disable_unprepare(i2c_dev->clk);
 	return ret ?: i;
 }
 
@@ -666,7 +666,7 @@ static int __devinit tegra_i2c_probe(struct platform_device *pdev)
 		goto err_free;
 	}
 
-	clk_enable(i2c_dev->i2c_clk);
+	clk_prepare_enable(i2c_dev->i2c_clk);
 
 	i2c_set_adapdata(&i2c_dev->adapter, i2c_dev);
 	i2c_dev->adapter.owner = THIS_MODULE;