Merge branch 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/…

…kernel/git/wsa/linux

Pull i2c fixes from Wolfram Sang:
 "Another bunch  of driver fixes"

* 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
  i2c: sprd: depend on COMMON_CLK to fix compile tests
  Revert "i2c: imx: Remove unused .id_table support"
  i2c: octeon: check correct size of maximum RECV_LEN packet
  i2c: tegra: Create i2c_writesl_vi() to use with VI I2C for filling TX FIFO
  i2c: bpmp-tegra: Ignore unknown I2C_M flags
  i2c: tegra: Wait for config load atomically while in ISR

drivers/i2c/busses/Kconfig

@@ -1013,6 +1013,7 @@ config I2C_SIRF
 config I2C_SPRD
 	tristate "Spreadtrum I2C interface"
 	depends on I2C=y && (ARCH_SPRD || COMPILE_TEST)
+	depends on COMMON_CLK
 	help
 	  If you say yes to this option, support will be included for the
 	  Spreadtrum I2C interface.

drivers/i2c/busses/i2c-imx.c

@@ -241,6 +241,19 @@ static struct imx_i2c_hwdata vf610_i2c_hwdata = {
 
 };
 
+static const struct platform_device_id imx_i2c_devtype[] = {
+	{
+		.name = "imx1-i2c",
+		.driver_data = (kernel_ulong_t)&imx1_i2c_hwdata,
+	}, {
+		.name = "imx21-i2c",
+		.driver_data = (kernel_ulong_t)&imx21_i2c_hwdata,
+	}, {
+		/* sentinel */
+	}
+};
+MODULE_DEVICE_TABLE(platform, imx_i2c_devtype);
+
 static const struct of_device_id i2c_imx_dt_ids[] = {
 	{ .compatible = "fsl,imx1-i2c", .data = &imx1_i2c_hwdata, },
 	{ .compatible = "fsl,imx21-i2c", .data = &imx21_i2c_hwdata, },
@@ -1330,7 +1343,11 @@ static int i2c_imx_probe(struct platform_device *pdev)
 		return -ENOMEM;
 
 	match = device_get_match_data(&pdev->dev);
-	i2c_imx->hwdata = match;
+	if (match)
+		i2c_imx->hwdata = match;
+	else
+		i2c_imx->hwdata = (struct imx_i2c_hwdata *)
+				platform_get_device_id(pdev)->driver_data;
 
 	/* Setup i2c_imx driver structure */
 	strlcpy(i2c_imx->adapter.name, pdev->name, sizeof(i2c_imx->adapter.name));
@@ -1498,6 +1515,7 @@ static struct platform_driver i2c_imx_driver = {
 		.of_match_table = i2c_imx_dt_ids,
 		.acpi_match_table = i2c_imx_acpi_ids,
 	},
+	.id_table = imx_i2c_devtype,
 };
 
 static int __init i2c_adap_imx_init(void)

drivers/i2c/busses/i2c-octeon-core.c

@@ -347,7 +347,7 @@ static int octeon_i2c_read(struct octeon_i2c *i2c, int target,
 		if (result)
 			return result;
 		if (recv_len && i == 0) {
-			if (data[i] > I2C_SMBUS_BLOCK_MAX + 1)
+			if (data[i] > I2C_SMBUS_BLOCK_MAX)
 				return -EPROTO;
 			length += data[i];
 		}

drivers/i2c/busses/i2c-tegra-bpmp.c

@@ -80,7 +80,7 @@ static int tegra_bpmp_xlate_flags(u16 flags, u16 *out)
 		flags &= ~I2C_M_RECV_LEN;
 	}
 
-	return (flags != 0) ? -EINVAL : 0;
+	return 0;
 }
 
 /**

drivers/i2c/busses/i2c-tegra.c

@@ -326,6 +326,8 @@ static void i2c_writel(struct tegra_i2c_dev *i2c_dev, u32 val, unsigned int reg)
 	/* read back register to make sure that register writes completed */
 	if (reg != I2C_TX_FIFO)
 		readl_relaxed(i2c_dev->base + tegra_i2c_reg_addr(i2c_dev, reg));
+	else if (i2c_dev->is_vi)
+		readl_relaxed(i2c_dev->base + tegra_i2c_reg_addr(i2c_dev, I2C_INT_STATUS));
 }
 
 static u32 i2c_readl(struct tegra_i2c_dev *i2c_dev, unsigned int reg)
@@ -339,6 +341,21 @@ static void i2c_writesl(struct tegra_i2c_dev *i2c_dev, void *data,
 	writesl(i2c_dev->base + tegra_i2c_reg_addr(i2c_dev, reg), data, len);
 }
 
+static void i2c_writesl_vi(struct tegra_i2c_dev *i2c_dev, void *data,
+			   unsigned int reg, unsigned int len)
+{
+	u32 *data32 = data;
+
+	/*
+	 * VI I2C controller has known hardware bug where writes get stuck
+	 * when immediate multiple writes happen to TX_FIFO register.
+	 * Recommended software work around is to read I2C register after
+	 * each write to TX_FIFO register to flush out the data.
+	 */
+	while (len--)
+		i2c_writel(i2c_dev, *data32++, reg);
+}
+
 static void i2c_readsl(struct tegra_i2c_dev *i2c_dev, void *data,
 		       unsigned int reg, unsigned int len)
 {
@@ -533,7 +550,7 @@ static int tegra_i2c_poll_register(struct tegra_i2c_dev *i2c_dev,
 	void __iomem *addr = i2c_dev->base + tegra_i2c_reg_addr(i2c_dev, reg);
 	u32 val;
 
-	if (!i2c_dev->atomic_mode)
+	if (!i2c_dev->atomic_mode && !in_irq())
 		return readl_relaxed_poll_timeout(addr, val, !(val & mask),
 						  delay_us, timeout_us);
 
@@ -811,7 +828,10 @@ static int tegra_i2c_fill_tx_fifo(struct tegra_i2c_dev *i2c_dev)
 		i2c_dev->msg_buf_remaining = buf_remaining;
 		i2c_dev->msg_buf = buf + words_to_transfer * BYTES_PER_FIFO_WORD;
 
-		i2c_writesl(i2c_dev, buf, I2C_TX_FIFO, words_to_transfer);
+		if (i2c_dev->is_vi)
+			i2c_writesl_vi(i2c_dev, buf, I2C_TX_FIFO, words_to_transfer);
+		else
+			i2c_writesl(i2c_dev, buf, I2C_TX_FIFO, words_to_transfer);
 
 		buf += words_to_transfer * BYTES_PER_FIFO_WORD;
 	}