Merge branch 'next-i2c' of git://aeryn.fluff.org.uk/bjdooks/linux

* 'next-i2c' of git://aeryn.fluff.org.uk/bjdooks/linux:
  i2c-ocores: Can add I2C devices to the bus
  i2c-s3c2410: move to using platform idtable to match devices
  i2c: OMAP3: Better noise suppression for fast/standard modes
  i2c: OMAP2/3: Fix scll/sclh calculations
  i2c: Blackfin TWI: implement I2C_FUNC_SMBUS_I2C_BLOCK functionality
  i2c: Blackfin TWI: fix transfer errors with repeat start
  i2c: Blackfin TWI: fix REPEAT START mode doesn't repeat
  i2c: Blackfin TWI: make sure we don't end up with a CLKDIV=0

5 files changed, 99 insertions, 54 deletions

diff --git a/drivers/i2c/busses/Kconfig b/drivers/i2c/busses/Kconfig
index f1c6ca7e285..c8460fa9cfa 100644
--- a/drivers/i2c/busses/Kconfig
+++ b/drivers/i2c/busses/Kconfig
@@ -298,7 +298,7 @@ config I2C_BLACKFIN_TWI
 config I2C_BLACKFIN_TWI_CLK_KHZ
 	int "Blackfin TWI I2C clock (kHz)"
 	depends on I2C_BLACKFIN_TWI
-	range 10 400
+	range 21 400
 	default 50
 	help
 	  The unit of the TWI clock is kHz.
diff --git a/drivers/i2c/busses/i2c-bfin-twi.c b/drivers/i2c/busses/i2c-bfin-twi.c
index fc548b3d002..26d8987e69b 100644
--- a/drivers/i2c/busses/i2c-bfin-twi.c
+++ b/drivers/i2c/busses/i2c-bfin-twi.c
@@ -104,9 +104,14 @@ static void bfin_twi_handle_interrupt(struct bfin_twi_iface *iface)
 			write_MASTER_CTL(iface,
 				read_MASTER_CTL(iface) | STOP);
 		else if (iface->cur_mode == TWI_I2C_MODE_REPEAT &&
-				iface->cur_msg+1 < iface->msg_num)
-			write_MASTER_CTL(iface,
-				read_MASTER_CTL(iface) | RSTART);
+		         iface->cur_msg + 1 < iface->msg_num) {
+			if (iface->pmsg[iface->cur_msg + 1].flags & I2C_M_RD)
+				write_MASTER_CTL(iface,
+					read_MASTER_CTL(iface) | RSTART | MDIR);
+			else
+				write_MASTER_CTL(iface,
+					(read_MASTER_CTL(iface) | RSTART) & ~MDIR);
+		}
 		SSYNC();
 		/* Clear status */
 		write_INT_STAT(iface, XMTSERV);
@@ -134,9 +139,13 @@ static void bfin_twi_handle_interrupt(struct bfin_twi_iface *iface)
 				read_MASTER_CTL(iface) | STOP);
 			SSYNC();
 		} else if (iface->cur_mode == TWI_I2C_MODE_REPEAT &&
-				iface->cur_msg+1 < iface->msg_num) {
-			write_MASTER_CTL(iface,
-				read_MASTER_CTL(iface) | RSTART);
+		           iface->cur_msg + 1 < iface->msg_num) {
+			if (iface->pmsg[iface->cur_msg + 1].flags & I2C_M_RD)
+				write_MASTER_CTL(iface,
+					read_MASTER_CTL(iface) | RSTART | MDIR);
+			else
+				write_MASTER_CTL(iface,
+					(read_MASTER_CTL(iface) | RSTART) & ~MDIR);
 			SSYNC();
 		}
 		/* Clear interrupt source */
@@ -196,8 +205,6 @@ static void bfin_twi_handle_interrupt(struct bfin_twi_iface *iface)
 			/* remove restart bit and enable master receive */
 			write_MASTER_CTL(iface,
 				read_MASTER_CTL(iface) & ~RSTART);
-			write_MASTER_CTL(iface,
-				read_MASTER_CTL(iface) | MEN | MDIR);
 			SSYNC();
 		} else if (iface->cur_mode == TWI_I2C_MODE_REPEAT &&
 				iface->cur_msg+1 < iface->msg_num) {
@@ -222,18 +229,19 @@ static void bfin_twi_handle_interrupt(struct bfin_twi_iface *iface)
 			}
 
 			if (iface->pmsg[iface->cur_msg].len <= 255)
-				write_MASTER_CTL(iface,
-				iface->pmsg[iface->cur_msg].len << 6);
+					write_MASTER_CTL(iface,
+					(read_MASTER_CTL(iface) &
+					(~(0xff << 6))) |
+				(iface->pmsg[iface->cur_msg].len << 6));
 			else {
-				write_MASTER_CTL(iface, 0xff << 6);
+				write_MASTER_CTL(iface,
+					(read_MASTER_CTL(iface) |
+					(0xff << 6)));
 				iface->manual_stop = 1;
 			}
 			/* remove restart bit and enable master receive */
 			write_MASTER_CTL(iface,
 				read_MASTER_CTL(iface) & ~RSTART);
-			write_MASTER_CTL(iface, read_MASTER_CTL(iface) |
-				MEN | ((iface->read_write == I2C_SMBUS_READ) ?
-				MDIR : 0));
 			SSYNC();
 		} else {
 			iface->result = 1;
@@ -441,6 +449,16 @@ int bfin_twi_smbus_xfer(struct i2c_adapter *adap, u16 addr,
 		}
 		iface->transPtr = data->block;
 		break;
+	case I2C_SMBUS_I2C_BLOCK_DATA:
+		if (read_write == I2C_SMBUS_READ) {
+			iface->readNum = data->block[0];
+			iface->cur_mode = TWI_I2C_MODE_COMBINED;
+		} else {
+			iface->writeNum = data->block[0];
+			iface->cur_mode = TWI_I2C_MODE_STANDARDSUB;
+		}
+		iface->transPtr = (u8 *)&data->block[1];
+		break;
 	default:
 		return -1;
 	}
@@ -564,7 +582,7 @@ static u32 bfin_twi_functionality(struct i2c_adapter *adap)
 	return I2C_FUNC_SMBUS_QUICK | I2C_FUNC_SMBUS_BYTE |
 	       I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_WORD_DATA |
 	       I2C_FUNC_SMBUS_BLOCK_DATA | I2C_FUNC_SMBUS_PROC_CALL |
-	       I2C_FUNC_I2C;
+	       I2C_FUNC_I2C | I2C_FUNC_SMBUS_I2C_BLOCK;
 }
 
 static struct i2c_algorithm bfin_twi_algorithm = {
@@ -614,6 +632,7 @@ static int i2c_bfin_twi_probe(struct platform_device *pdev)
 	struct i2c_adapter *p_adap;
 	struct resource *res;
 	int rc;
+	unsigned int clkhilow;
 
 	iface = kzalloc(sizeof(struct bfin_twi_iface), GFP_KERNEL);
 	if (!iface) {
@@ -675,10 +694,14 @@ static int i2c_bfin_twi_probe(struct platform_device *pdev)
 	/* Set TWI internal clock as 10MHz */
 	write_CONTROL(iface, ((get_sclk() / 1024 / 1024 + 5) / 10) & 0x7F);
 
+	/*
+	 * We will not end up with a CLKDIV=0 because no one will specify
+	 * 20kHz SCL or less in Kconfig now. (5 * 1024 / 20 = 0x100)
+	 */
+	clkhilow = 5 * 1024 / CONFIG_I2C_BLACKFIN_TWI_CLK_KHZ;
+
 	/* Set Twi interface clock as specified */
-	write_CLKDIV(iface, ((5*1024 / CONFIG_I2C_BLACKFIN_TWI_CLK_KHZ)
-			<< 8) | ((5*1024 / CONFIG_I2C_BLACKFIN_TWI_CLK_KHZ)
-			& 0xFF));
+	write_CLKDIV(iface, (clkhilow << 8) | clkhilow);
 
 	/* Enable TWI */
 	write_CONTROL(iface, read_CONTROL(iface) | TWI_ENA);
diff --git a/drivers/i2c/busses/i2c-ocores.c b/drivers/i2c/busses/i2c-ocores.c
index e5193bf7548..3542c6ba98f 100644
--- a/drivers/i2c/busses/i2c-ocores.c
+++ b/drivers/i2c/busses/i2c-ocores.c
@@ -216,6 +216,7 @@ static int __devinit ocores_i2c_probe(struct platform_device *pdev)
 	struct ocores_i2c_platform_data *pdata;
 	struct resource *res, *res2;
 	int ret;
+	int i;
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	if (!res)
@@ -271,6 +272,10 @@ static int __devinit ocores_i2c_probe(struct platform_device *pdev)
 		goto add_adapter_failed;
 	}
 
+	/* add in known devices to the bus */
+	for (i = 0; i < pdata->num_devices; i++)
+		i2c_new_device(&i2c->adap, pdata->devices + i);
+
 	return 0;
 
 add_adapter_failed:
diff --git a/drivers/i2c/busses/i2c-omap.c b/drivers/i2c/busses/i2c-omap.c
index ece0125a1ee..c73475dd0fb 100644
--- a/drivers/i2c/busses/i2c-omap.c
+++ b/drivers/i2c/busses/i2c-omap.c
@@ -333,8 +333,18 @@ static int omap_i2c_init(struct omap_i2c_dev *dev)
 
 	if (cpu_is_omap2430() || cpu_is_omap34xx()) {
 
-		/* HSI2C controller internal clk rate should be 19.2 Mhz */
-		internal_clk = 19200;
+		/*
+		 * HSI2C controller internal clk rate should be 19.2 Mhz for
+		 * HS and for all modes on 2430. On 34xx we can use lower rate
+		 * to get longer filter period for better noise suppression.
+		 * The filter is iclk (fclk for HS) period.
+		 */
+		if (dev->speed > 400 || cpu_is_omap_2430())
+			internal_clk = 19200;
+		else if (dev->speed > 100)
+			internal_clk = 9600;
+		else
+			internal_clk = 4000;
 		fclk_rate = clk_get_rate(dev->fclk) / 1000;
 
 		/* Compute prescaler divisor */
@@ -343,17 +353,28 @@ static int omap_i2c_init(struct omap_i2c_dev *dev)
 
 		/* If configured for High Speed */
 		if (dev->speed > 400) {
+			unsigned long scl;
+
 			/* For first phase of HS mode */
-			fsscll = internal_clk / (400 * 2) - 6;
-			fssclh = internal_clk / (400 * 2) - 6;
+			scl = internal_clk / 400;
+			fsscll = scl - (scl / 3) - 7;
+			fssclh = (scl / 3) - 5;
 
 			/* For second phase of HS mode */
-			hsscll = fclk_rate / (dev->speed * 2) - 6;
-			hssclh = fclk_rate / (dev->speed * 2) - 6;
+			scl = fclk_rate / dev->speed;
+			hsscll = scl - (scl / 3) - 7;
+			hssclh = (scl / 3) - 5;
+		} else if (dev->speed > 100) {
+			unsigned long scl;
+
+			/* Fast mode */
+			scl = internal_clk / dev->speed;
+			fsscll = scl - (scl / 3) - 7;
+			fssclh = (scl / 3) - 5;
 		} else {
-			/* To handle F/S modes */
-			fsscll = internal_clk / (dev->speed * 2) - 6;
-			fssclh = internal_clk / (dev->speed * 2) - 6;
+			/* Standard mode */
+			fsscll = internal_clk / (dev->speed * 2) - 7;
+			fssclh = internal_clk / (dev->speed * 2) - 5;
 		}
 		scll = (hsscll << OMAP_I2C_SCLL_HSSCLL) | fsscll;
 		sclh = (hssclh << OMAP_I2C_SCLH_HSSCLH) | fssclh;
diff --git a/drivers/i2c/busses/i2c-s3c2410.c b/drivers/i2c/busses/i2c-s3c2410.c
index 1691ef0f1ee..079a312d36f 100644
--- a/drivers/i2c/busses/i2c-s3c2410.c
+++ b/drivers/i2c/busses/i2c-s3c2410.c
@@ -51,6 +51,11 @@ enum s3c24xx_i2c_state {
 	STATE_STOP
 };
 
+enum s3c24xx_i2c_type {
+	TYPE_S3C2410,
+	TYPE_S3C2440,
+};
+
 struct s3c24xx_i2c {
 	spinlock_t		lock;
 	wait_queue_head_t	wait;
@@ -88,8 +93,10 @@ struct s3c24xx_i2c {
 static inline int s3c24xx_i2c_is2440(struct s3c24xx_i2c *i2c)
 {
 	struct platform_device *pdev = to_platform_device(i2c->dev);
+	enum s3c24xx_i2c_type type;
 
-	return !strcmp(pdev->name, "s3c2440-i2c");
+	type = platform_get_device_id(pdev)->driver_data;
+	return type == TYPE_S3C2440;
 }
 
 /* s3c24xx_i2c_master_complete
@@ -969,52 +976,41 @@ static int s3c24xx_i2c_resume(struct platform_device *dev)
 
 /* device driver for platform bus bits */
 
-static struct platform_driver s3c2410_i2c_driver = {
-	.probe		= s3c24xx_i2c_probe,
-	.remove		= s3c24xx_i2c_remove,
-	.suspend_late	= s3c24xx_i2c_suspend_late,
-	.resume		= s3c24xx_i2c_resume,
-	.driver		= {
-		.owner	= THIS_MODULE,
-		.name	= "s3c2410-i2c",
-	},
+static struct platform_device_id s3c24xx_driver_ids[] = {
+	{
+		.name		= "s3c2410-i2c",
+		.driver_data	= TYPE_S3C2410,
+	}, {
+		.name		= "s3c2440-i2c",
+		.driver_data	= TYPE_S3C2440,
+	}, { },
 };
+MODULE_DEVICE_TABLE(platform, s3c24xx_driver_ids);
 
-static struct platform_driver s3c2440_i2c_driver = {
+static struct platform_driver s3c24xx_i2c_driver = {
 	.probe		= s3c24xx_i2c_probe,
 	.remove		= s3c24xx_i2c_remove,
 	.suspend_late	= s3c24xx_i2c_suspend_late,
 	.resume		= s3c24xx_i2c_resume,
+	.id_table	= s3c24xx_driver_ids,
 	.driver		= {
 		.owner	= THIS_MODULE,
-		.name	= "s3c2440-i2c",
+		.name	= "s3c-i2c",
 	},
 };
 
 static int __init i2c_adap_s3c_init(void)
 {
-	int ret;
-
-	ret = platform_driver_register(&s3c2410_i2c_driver);
-	if (ret == 0) {
-		ret = platform_driver_register(&s3c2440_i2c_driver);
-		if (ret)
-			platform_driver_unregister(&s3c2410_i2c_driver);
-	}
-
-	return ret;
+	return platform_driver_register(&s3c24xx_i2c_driver);
 }
 subsys_initcall(i2c_adap_s3c_init);
 
 static void __exit i2c_adap_s3c_exit(void)
 {
-	platform_driver_unregister(&s3c2410_i2c_driver);
-	platform_driver_unregister(&s3c2440_i2c_driver);
+	platform_driver_unregister(&s3c24xx_i2c_driver);
 }
 module_exit(i2c_adap_s3c_exit);
 
 MODULE_DESCRIPTION("S3C24XX I2C Bus driver");
 MODULE_AUTHOR("Ben Dooks, <ben@simtec.co.uk>");
 MODULE_LICENSE("GPL");
-MODULE_ALIAS("platform:s3c2410-i2c");
-MODULE_ALIAS("platform:s3c2440-i2c");