Merge branch 'for-linus/2640/i2c' of git://git.fluff.org/bjdooks/linux

* 'for-linus/2640/i2c' of git://git.fluff.org/bjdooks/linux: (21 commits)
  mach-ux500: set proper I2C platform data from MOP500s
  i2c-nomadik: break out single messsage transmission
  i2c-nomadik: reset the hw after status check
  i2c-nomadik: remove the unnecessary delay
  i2c-nomadik: change the TX and RX threshold
  i2c-nomadik: add code to retry on timeout failure
  i2c-nomadik: use pm_runtime API
  i2c-nomadik: print abort cause only on abort tag
  i2c-nomadik: correct adapter timeout initialization
  i2c-nomadik: remove the redundant error message
  i2c-nomadik: corrrect returned error numbers
  i2c-nomadik: fix speed enumerator
  i2c-nomadik: make i2c timeout specific per i2c bus
  i2c-nomadik: add regulator support
  i2c: i2c-sh_mobile bus speed platform data V2
  i2c: i2c-sh_mobile clock string removal
  i2c-eg20t: Support new device ML7223 IOH
  i2c: tegra: Add de-bounce cycles.
  i2c: tegra: fix repeated start handling
  i2c: tegra: recover from spurious interrupt storm
  ...

arch/arm/mach-ux500/board-mop500.c

@@ -204,7 +204,7 @@ static struct i2c_board_info __initdata mop500_i2c2_devices[] = {
 	},
 };
 
-#define U8500_I2C_CONTROLLER(id, _slsu, _tft, _rft, clk, _sm) \
+#define U8500_I2C_CONTROLLER(id, _slsu, _tft, _rft, clk, t_out, _sm)	\
 static struct nmk_i2c_controller u8500_i2c##id##_data = { \
 	/*				\
 	 * slave data setup time, which is	\
@@ -219,19 +219,21 @@ static struct nmk_i2c_controller u8500_i2c##id##_data = { \
 	.rft		= _rft,		\
 	/* std. mode operation */	\
 	.clk_freq	= clk,		\
+	/* Slave response timeout(ms) */\
+	.timeout	= t_out,	\
 	.sm		= _sm,		\
 }
 
 /*
  * The board uses 4 i2c controllers, initialize all of
  * them with slave data setup time of 250 ns,
- * Tx & Rx FIFO threshold values as 1 and standard
+ * Tx & Rx FIFO threshold values as 8 and standard
  * mode of operation
  */
-U8500_I2C_CONTROLLER(0, 0xe, 1, 1, 100000, I2C_FREQ_MODE_STANDARD);
-U8500_I2C_CONTROLLER(1, 0xe, 1, 1, 100000, I2C_FREQ_MODE_STANDARD);
-U8500_I2C_CONTROLLER(2,	0xe, 1, 1, 100000, I2C_FREQ_MODE_STANDARD);
-U8500_I2C_CONTROLLER(3,	0xe, 1, 1, 100000, I2C_FREQ_MODE_STANDARD);
+U8500_I2C_CONTROLLER(0, 0xe, 1, 8, 100000, 200, I2C_FREQ_MODE_FAST);
+U8500_I2C_CONTROLLER(1, 0xe, 1, 8, 100000, 200, I2C_FREQ_MODE_FAST);
+U8500_I2C_CONTROLLER(2,	0xe, 1, 8, 100000, 200, I2C_FREQ_MODE_FAST);
+U8500_I2C_CONTROLLER(3,	0xe, 1, 8, 100000, 200, I2C_FREQ_MODE_FAST);
 
 static void __init mop500_i2c_init(void)
 {

arch/arm/plat-nomadik/include/plat/i2c.h

@@ -11,8 +11,8 @@
 enum i2c_freq_mode {
 	I2C_FREQ_MODE_STANDARD,		/* up to 100 Kb/s */
 	I2C_FREQ_MODE_FAST,		/* up to 400 Kb/s */
+	I2C_FREQ_MODE_HIGH_SPEED,	/* up to 3.4 Mb/s */
 	I2C_FREQ_MODE_FAST_PLUS,	/* up to 1 Mb/s */
-	I2C_FREQ_MODE_HIGH_SPEED	/* up to 3.4 Mb/s */
 };
 
 /**
@@ -24,13 +24,15 @@ enum i2c_freq_mode {
  *		to the values of 14, 6, 2 for a 48 MHz i2c clk
  * @tft:	Tx FIFO Threshold in bytes
  * @rft:	Rx FIFO Threshold in bytes
+ * @timeout	Slave response timeout(ms)
  * @sm:		speed mode
  */
 struct nmk_i2c_controller {
 	unsigned long	clk_freq;
 	unsigned short	slsu;
-	unsigned char 	tft;
-	unsigned char 	rft;
+	unsigned char	tft;
+	unsigned char	rft;
+	int timeout;
 	enum i2c_freq_mode	sm;
 };
 

drivers/i2c/busses/Kconfig

@@ -673,15 +673,19 @@ config I2C_XILINX
 	  will be called xilinx_i2c.
 
 config I2C_EG20T
-	tristate "Intel EG20T PCH/OKI SEMICONDUCTOR ML7213 IOH"
+	tristate "Intel EG20T PCH / OKI SEMICONDUCTOR IOH(ML7213/ML7223)"
 	depends on PCI
 	help
 	  This driver is for PCH(Platform controller Hub) I2C of EG20T which
 	  is an IOH(Input/Output Hub) for x86 embedded processor.
 	  This driver can access PCH I2C bus device.
 
-	  This driver also supports the ML7213, a companion chip for the
-	  Atom E6xx series and compatible with the Intel EG20T PCH.
+	  This driver also can be used for OKI SEMICONDUCTOR IOH(Input/
+	  Output Hub), ML7213 and ML7223.
+	  ML7213 IOH is for IVI(In-Vehicle Infotainment) use and ML7223 IOH is
+	  for MP(Media Phone) use.
+	  ML7213/ML7223 is companion chip for Intel Atom E6xx series.
+	  ML7213/ML7223 is completely compatible for Intel EG20T PCH.
 
 comment "External I2C/SMBus adapter drivers"
 

drivers/i2c/busses/i2c-eg20t.c

@@ -182,10 +182,12 @@ static DEFINE_MUTEX(pch_mutex);
 /* Definition for ML7213 by OKI SEMICONDUCTOR */
 #define PCI_VENDOR_ID_ROHM		0x10DB
 #define PCI_DEVICE_ID_ML7213_I2C	0x802D
+#define PCI_DEVICE_ID_ML7223_I2C	0x8010
 
 static struct pci_device_id __devinitdata pch_pcidev_id[] = {
 	{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_PCH_I2C),   1, },
 	{ PCI_VDEVICE(ROHM, PCI_DEVICE_ID_ML7213_I2C), 2, },
+	{ PCI_VDEVICE(ROHM, PCI_DEVICE_ID_ML7223_I2C), 1, },
 	{0,}
 };
 

drivers/i2c/busses/i2c-sh_mobile.c

@@ -32,6 +32,7 @@
 #include <linux/clk.h>
 #include <linux/io.h>
 #include <linux/slab.h>
+#include <linux/i2c/i2c-sh_mobile.h>
 
 /* Transmit operation:                                                      */
 /*                                                                          */
@@ -117,7 +118,7 @@ struct sh_mobile_i2c_data {
 	struct device *dev;
 	void __iomem *reg;
 	struct i2c_adapter adap;
-
+	unsigned long bus_speed;
 	struct clk *clk;
 	u_int8_t icic;
 	u_int8_t iccl;
@@ -205,7 +206,7 @@ static void activate_ch(struct sh_mobile_i2c_data *pd)
 	 * We also round off the result.
 	 */
 	num = i2c_clk * 5;
-	denom = NORMAL_SPEED * 9;
+	denom = pd->bus_speed * 9;
 	tmp = num * 10 / denom;
 	if (tmp % 10 >= 5)
 		pd->iccl = (u_int8_t)((num/denom) + 1);
@@ -574,10 +575,10 @@ static int sh_mobile_i2c_hook_irqs(struct platform_device *dev, int hook)
 
 static int sh_mobile_i2c_probe(struct platform_device *dev)
 {
+	struct i2c_sh_mobile_platform_data *pdata = dev->dev.platform_data;
 	struct sh_mobile_i2c_data *pd;
 	struct i2c_adapter *adap;
 	struct resource *res;
-	char clk_name[8];
 	int size;
 	int ret;
 
@@ -587,10 +588,9 @@ static int sh_mobile_i2c_probe(struct platform_device *dev)
 		return -ENOMEM;
 	}
 
-	snprintf(clk_name, sizeof(clk_name), "i2c%d", dev->id);
-	pd->clk = clk_get(&dev->dev, clk_name);
+	pd->clk = clk_get(&dev->dev, NULL);
 	if (IS_ERR(pd->clk)) {
-		dev_err(&dev->dev, "cannot get clock \"%s\"\n", clk_name);
+		dev_err(&dev->dev, "cannot get clock\n");
 		ret = PTR_ERR(pd->clk);
 		goto err;
 	}
@@ -620,6 +620,11 @@ static int sh_mobile_i2c_probe(struct platform_device *dev)
 		goto err_irq;
 	}
 
+	/* Use platformd data bus speed or NORMAL_SPEED */
+	pd->bus_speed = NORMAL_SPEED;
+	if (pdata && pdata->bus_speed)
+		pd->bus_speed = pdata->bus_speed;
+
 	/* The IIC blocks on SH-Mobile ARM processors
 	 * come with two new bits in ICIC.
 	 */
@@ -660,6 +665,8 @@ static int sh_mobile_i2c_probe(struct platform_device *dev)
 		goto err_all;
 	}
 
+	dev_info(&dev->dev, "I2C adapter %d with bus speed %lu Hz\n",
+		 adap->nr, pd->bus_speed);
 	return 0;
 
  err_all:

drivers/i2c/busses/i2c-tegra.c

@@ -35,8 +35,10 @@
 #define BYTES_PER_FIFO_WORD 4
 
 #define I2C_CNFG				0x000
+#define I2C_CNFG_DEBOUNCE_CNT_SHIFT		12
 #define I2C_CNFG_PACKET_MODE_EN			(1<<10)
 #define I2C_CNFG_NEW_MASTER_FSM			(1<<11)
+#define I2C_STATUS				0x01C
 #define I2C_SL_CNFG				0x020
 #define I2C_SL_CNFG_NEWSL			(1<<2)
 #define I2C_SL_ADDR1				0x02c
@@ -77,6 +79,7 @@
 #define I2C_ERR_NONE				0x00
 #define I2C_ERR_NO_ACK				0x01
 #define I2C_ERR_ARBITRATION_LOST		0x02
+#define I2C_ERR_UNKNOWN_INTERRUPT		0x04
 
 #define PACKET_HEADER0_HEADER_SIZE_SHIFT	28
 #define PACKET_HEADER0_PACKET_ID_SHIFT		16
@@ -121,6 +124,7 @@ struct tegra_i2c_dev {
 	void __iomem *base;
 	int cont_id;
 	int irq;
+	bool irq_disabled;
 	int is_dvc;
 	struct completion msg_complete;
 	int msg_err;
@@ -325,11 +329,17 @@ static int tegra_i2c_init(struct tegra_i2c_dev *i2c_dev)
 	if (i2c_dev->is_dvc)
 		tegra_dvc_init(i2c_dev);
 
-	val = I2C_CNFG_NEW_MASTER_FSM | I2C_CNFG_PACKET_MODE_EN;
+	val = I2C_CNFG_NEW_MASTER_FSM | I2C_CNFG_PACKET_MODE_EN |
+		(0x2 << I2C_CNFG_DEBOUNCE_CNT_SHIFT);
 	i2c_writel(i2c_dev, val, I2C_CNFG);
 	i2c_writel(i2c_dev, 0, I2C_INT_MASK);
 	clk_set_rate(i2c_dev->clk, i2c_dev->bus_clk_rate * 8);
 
+	if (!i2c_dev->is_dvc) {
+		u32 sl_cfg = i2c_readl(i2c_dev, I2C_SL_CNFG);
+		i2c_writel(i2c_dev, sl_cfg | I2C_SL_CNFG_NEWSL, I2C_SL_CNFG);
+	}
+
 	val = 7 << I2C_FIFO_CONTROL_TX_TRIG_SHIFT |
 		0 << I2C_FIFO_CONTROL_RX_TRIG_SHIFT;
 	i2c_writel(i2c_dev, val, I2C_FIFO_CONTROL);
@@ -338,6 +348,12 @@ static int tegra_i2c_init(struct tegra_i2c_dev *i2c_dev)
 		err = -ETIMEDOUT;
 
 	clk_disable(i2c_dev->clk);
+
+	if (i2c_dev->irq_disabled) {
+		i2c_dev->irq_disabled = 0;
+		enable_irq(i2c_dev->irq);
+	}
+
 	return err;
 }
 
@@ -350,8 +366,19 @@ static irqreturn_t tegra_i2c_isr(int irq, void *dev_id)
 	status = i2c_readl(i2c_dev, I2C_INT_STATUS);
 
 	if (status == 0) {
-		dev_warn(i2c_dev->dev, "interrupt with no status\n");
-		return IRQ_NONE;
+		dev_warn(i2c_dev->dev, "irq status 0 %08x %08x %08x\n",
+			 i2c_readl(i2c_dev, I2C_PACKET_TRANSFER_STATUS),
+			 i2c_readl(i2c_dev, I2C_STATUS),
+			 i2c_readl(i2c_dev, I2C_CNFG));
+		i2c_dev->msg_err |= I2C_ERR_UNKNOWN_INTERRUPT;
+
+		if (!i2c_dev->irq_disabled) {
+			disable_irq_nosync(i2c_dev->irq);
+			i2c_dev->irq_disabled = 1;
+		}
+
+		complete(&i2c_dev->msg_complete);
+		goto err;
 	}
 
 	if (unlikely(status & status_err)) {
@@ -391,6 +418,8 @@ static irqreturn_t tegra_i2c_isr(int irq, void *dev_id)
 		I2C_INT_PACKET_XFER_COMPLETE | I2C_INT_TX_FIFO_DATA_REQ |
 		I2C_INT_RX_FIFO_DATA_REQ);
 	i2c_writel(i2c_dev, status, I2C_INT_STATUS);
+	if (i2c_dev->is_dvc)
+		dvc_writel(i2c_dev, DVC_STATUS_I2C_DONE_INTR, DVC_STATUS);
 	return IRQ_HANDLED;
 }
 
@@ -424,12 +453,12 @@ static int tegra_i2c_xfer_msg(struct tegra_i2c_dev *i2c_dev,
 
 	packet_header = msg->addr << I2C_HEADER_SLAVE_ADDR_SHIFT;
 	packet_header |= I2C_HEADER_IE_ENABLE;
+	if (!stop)
+		packet_header |= I2C_HEADER_REPEAT_START;
 	if (msg->flags & I2C_M_TEN)
 		packet_header |= I2C_HEADER_10BIT_ADDR;
 	if (msg->flags & I2C_M_IGNORE_NAK)
 		packet_header |= I2C_HEADER_CONT_ON_NAK;
-	if (msg->flags & I2C_M_NOSTART)
-		packet_header |= I2C_HEADER_REPEAT_START;
 	if (msg->flags & I2C_M_RD)
 		packet_header |= I2C_HEADER_READ;
 	i2c_writel(i2c_dev, packet_header, I2C_TX_FIFO);

include/linux/i2c/i2c-sh_mobile.h

+#ifndef __I2C_SH_MOBILE_H__
+#define __I2C_SH_MOBILE_H__
+
+#include <linux/platform_device.h>
+
+struct i2c_sh_mobile_platform_data {
+	unsigned long bus_speed;
+};
+
+#endif /* __I2C_SH_MOBILE_H__ */