Merge branch 'i2c-for-linus' of git://jdelvare.pck.nerim.net/jdelvare…

…-2.6 * 'i2c-for-linus' of git://jdelvare.pck.nerim.net/jdelvare-2.6: Add i2c_board_info for RiscPC PCF8583 i2c: Make sure i2c_algo_bit_data.timeout is HZ-independent i2c-dev: Clarify the unit of ioctl I2C_TIMEOUT i2c: Timeouts reach -1 i2c: Fix misplaced parentheses
mariux64 · Feb 24, 2009 · 21209b6 · 21209b6
2 parents a792cd1 + 531660e
commit 21209b6
Show file tree

Hide file tree

Showing 10 changed files with 23 additions and 11 deletions.
diff --git a/arch/arm/mach-rpc/riscpc.c b/arch/arm/mach-rpc/riscpc.c
@@ -19,6 +19,7 @@
 #include <linux/serial_8250.h>
 #include <linux/ata_platform.h>
 #include <linux/io.h>
+#include <linux/i2c.h>
 
 #include <asm/elf.h>
 #include <asm/mach-types.h>
@@ -201,8 +202,13 @@ static struct platform_device *devs[] __initdata = {
 	&pata_device,
 };
 
+static struct i2c_board_info i2c_rtc = {
+	I2C_BOARD_INFO("pcf8583", 0x50)
+};
+
 static int __init rpc_init(void)
 {
+	i2c_register_board_info(0, &i2c_rtc, 1);
 	return platform_add_devices(devs, ARRAY_SIZE(devs));
 }
 

diff --git a/drivers/i2c/busses/i2c-acorn.c b/drivers/i2c/busses/i2c-acorn.c
@@ -79,18 +79,19 @@ static struct i2c_algo_bit_data ioc_data = {
 	.getsda		= ioc_getsda,
 	.getscl		= ioc_getscl,
 	.udelay		= 80,
-	.timeout	= 100
+	.timeout	= HZ,
 };
 
 static struct i2c_adapter ioc_ops = {
+	.nr			= 0,
 	.algo_data		= &ioc_data,
 };
 
 static int __init i2c_ioc_init(void)
 {
 	force_ones = FORCE_ONES | SCL | SDA;
 
-	return i2c_bit_add_bus(&ioc_ops);
+	return i2c_bit_add_numbered_bus(&ioc_ops);
 }
 
 module_init(i2c_ioc_init);
diff --git a/drivers/i2c/busses/i2c-amd8111.c b/drivers/i2c/busses/i2c-amd8111.c
@@ -72,7 +72,7 @@ static unsigned int amd_ec_wait_write(struct amd_smbus *smbus)
 {
 	int timeout = 500;
 
-	while (timeout-- && (inb(smbus->base + AMD_EC_SC) & AMD_EC_SC_IBF))
+	while ((inb(smbus->base + AMD_EC_SC) & AMD_EC_SC_IBF) && --timeout)
 		udelay(1);
 
 	if (!timeout) {
@@ -88,7 +88,7 @@ static unsigned int amd_ec_wait_read(struct amd_smbus *smbus)
 {
 	int timeout = 500;
 
-	while (timeout-- && (~inb(smbus->base + AMD_EC_SC) & AMD_EC_SC_OBF))
+	while ((~inb(smbus->base + AMD_EC_SC) & AMD_EC_SC_OBF) && --timeout)
 		udelay(1);
 
 	if (!timeout) {

diff --git a/drivers/i2c/busses/i2c-ixp2000.c b/drivers/i2c/busses/i2c-ixp2000.c
@@ -114,7 +114,7 @@ static int ixp2000_i2c_probe(struct platform_device *plat_dev)
 	drv_data->algo_data.getsda = ixp2000_bit_getsda;
 	drv_data->algo_data.getscl = ixp2000_bit_getscl;
 	drv_data->algo_data.udelay = 6;
-	drv_data->algo_data.timeout = 100;
+	drv_data->algo_data.timeout = HZ;
 
 	strlcpy(drv_data->adapter.name, plat_dev->dev.driver->name,
 		sizeof(drv_data->adapter.name));

diff --git a/drivers/i2c/busses/i2c-pxa.c b/drivers/i2c/busses/i2c-pxa.c
@@ -644,7 +644,7 @@ static int i2c_pxa_do_pio_xfer(struct pxa_i2c *i2c,
 
 	i2c_pxa_start_message(i2c);
 
-	while (timeout-- && i2c->msg_num > 0) {
+	while (i2c->msg_num > 0 && --timeout) {
 		i2c_pxa_handler(0, i2c);
 		udelay(10);
 	}

diff --git a/drivers/i2c/busses/scx200_i2c.c b/drivers/i2c/busses/scx200_i2c.c
@@ -76,7 +76,7 @@ static struct i2c_algo_bit_data scx200_i2c_data = {
 	.getsda		= scx200_i2c_getsda,
 	.getscl		= scx200_i2c_getscl,
 	.udelay		= 10,
-	.timeout	= 100,
+	.timeout	= HZ,
 };
 
 static struct i2c_adapter scx200_i2c_ops = {

diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c
@@ -1831,7 +1831,8 @@ static s32 i2c_smbus_xfer_emulated(struct i2c_adapter * adapter, u16 addr,
 	case I2C_SMBUS_QUICK:
 		msg[0].len = 0;
 		/* Special case: The read/write field is used as data */
-		msg[0].flags = flags | (read_write==I2C_SMBUS_READ)?I2C_M_RD:0;
+		msg[0].flags = flags | (read_write == I2C_SMBUS_READ ?
+					I2C_M_RD : 0);
 		num = 1;
 		break;
 	case I2C_SMBUS_BYTE:

diff --git a/drivers/i2c/i2c-dev.c b/drivers/i2c/i2c-dev.c
@@ -35,6 +35,7 @@
 #include <linux/i2c.h>
 #include <linux/i2c-dev.h>
 #include <linux/smp_lock.h>
+#include <linux/jiffies.h>
 #include <asm/uaccess.h>
 
 static struct i2c_driver i2cdev_driver;
@@ -422,7 +423,10 @@ static long i2cdev_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 		client->adapter->retries = arg;
 		break;
 	case I2C_TIMEOUT:
-		client->adapter->timeout = arg;
+		/* For historical reasons, user-space sets the timeout
+		 * value in units of 10 ms.
+		 */
+		client->adapter->timeout = msecs_to_jiffies(arg * 10);
 		break;
 	default:
 		/* NOTE:  returning a fault code here could cause trouble

diff --git a/include/linux/i2c-dev.h b/include/linux/i2c-dev.h
@@ -33,7 +33,7 @@
  */
 #define I2C_RETRIES	0x0701	/* number of times a device address should
 				   be polled when not acknowledging */
-#define I2C_TIMEOUT	0x0702	/* set timeout in jiffies - call with int */
+#define I2C_TIMEOUT	0x0702	/* set timeout in units of 10 ms */
 
 /* NOTE: Slave address is 7 or 10 bits, but 10-bit addresses
  * are NOT supported! (due to code brokenness)

diff --git a/include/linux/i2c.h b/include/linux/i2c.h
@@ -361,7 +361,7 @@ struct i2c_adapter {
 	struct mutex bus_lock;
 	struct mutex clist_lock;
 
-	int timeout;
+	int timeout;			/* in jiffies */
 	int retries;
 	struct device dev;		/* the adapter device */