Merge branch 'i2c/for-5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux

Pull i2c updates from Wolfram Sang:
 "A bit smaller this time with mostly usual driver updates. Slave
  support for imx stands out a little"

* 'i2c/for-5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: (30 commits)
  i2c: remove check that can never be true
  i2c: Warn when device removing fails
  dt-bindings: i2c: Update DT binding docs to support SiFive FU740 SoC
  dt-bindings: i2c: Add compatible string for AM64 SoC
  i2c: designware: Make register offsets all of the same width
  i2c: designware: Switch header to use BIT() and GENMASK()
  i2c: pxa: move to generic GPIO recovery
  i2c: sh_mobile: Mark adapter suspended during suspend
  i2c: owl: Add compatible for the Actions Semi S500 I2C controller
  dt-bindings: i2c: owl: Convert Actions Semi Owl binding to a schema
  i2c: imx: support slave mode for imx I2C driver
  i2c: ismt: Adding support for I2C_SMBUS_BLOCK_PROC_CALL
  i2c: ocores: Avoid false-positive error log message.
  Revert "i2c: qcom-geni: Disable DMA processing on the Lenovo Yoga C630"
  i2c: mxs: Remove unneeded platform_device_id
  i2c: pca-platform: drop two members from driver data that are assigned to only
  i2c: imx: Remove unused .id_table support
  i2c: nvidia-gpu: drop empty stub for runtime pm
  dt-bindings: i2c: mellanox,i2c-mlxbf: convert txt to YAML schema
  i2c: mv64xxx: Add bus error recovery
  ...

1 files changed, 28 insertions, 1 deletions

diff --git a/drivers/i2c/busses/i2c-mv64xxx.c b/drivers/i2c/busses/i2c-mv64xxx.c
index e0e45fc19b8f..5cfe70aedced 100644
--- a/drivers/i2c/busses/i2c-mv64xxx.c
+++ b/drivers/i2c/busses/i2c-mv64xxx.c
@@ -17,6 +17,7 @@
 #include <linux/interrupt.h>
 #include <linux/mv643xx_i2c.h>
 #include <linux/platform_device.h>
+#include <linux/pinctrl/consumer.h>
 #include <linux/reset.h>
 #include <linux/io.h>
 #include <linux/of.h>
@@ -147,6 +148,7 @@ struct mv64xxx_i2c_data {
 	bool			irq_clear_inverted;
 	/* Clk div is 2 to the power n, not 2 to the power n + 1 */
 	bool			clk_n_base_0;
+	struct i2c_bus_recovery_info	rinfo;
 };
 
 static struct mv64xxx_i2c_regs mv64xxx_i2c_regs_mv64xxx = {
@@ -325,7 +327,8 @@ mv64xxx_i2c_fsm(struct mv64xxx_i2c_data *drv_data, u32 status)
 			 drv_data->msg->flags);
 		drv_data->action = MV64XXX_I2C_ACTION_SEND_STOP;
 		mv64xxx_i2c_hw_init(drv_data);
-		drv_data->rc = -EIO;
+		i2c_recover_bus(&drv_data->adapter);
+		drv_data->rc = -EAGAIN;
 	}
 }
 
@@ -561,6 +564,7 @@ mv64xxx_i2c_wait_for_completion(struct mv64xxx_i2c_data *drv_data)
 				"time_left: %d\n", drv_data->block,
 				(int)time_left);
 			mv64xxx_i2c_hw_init(drv_data);
+			i2c_recover_bus(&drv_data->adapter);
 		}
 	} else
 		spin_unlock_irqrestore(&drv_data->lock, flags);
@@ -870,6 +874,25 @@ mv64xxx_of_config(struct mv64xxx_i2c_data *drv_data,
 }
 #endif /* CONFIG_OF */
 
+static int mv64xxx_i2c_init_recovery_info(struct mv64xxx_i2c_data *drv_data,
+					  struct device *dev)
+{
+	struct i2c_bus_recovery_info *rinfo = &drv_data->rinfo;
+
+	rinfo->pinctrl = devm_pinctrl_get(dev);
+	if (IS_ERR(rinfo->pinctrl)) {
+		if (PTR_ERR(rinfo->pinctrl) == -EPROBE_DEFER)
+			return -EPROBE_DEFER;
+		dev_info(dev, "can't get pinctrl, bus recovery not supported\n");
+		return PTR_ERR(rinfo->pinctrl);
+	} else if (!rinfo->pinctrl) {
+		return -ENODEV;
+	}
+
+	drv_data->adapter.bus_recovery_info = rinfo;
+	return 0;
+}
+
 static int
 mv64xxx_i2c_probe(struct platform_device *pd)
 {
@@ -926,6 +949,10 @@ mv64xxx_i2c_probe(struct platform_device *pd)
 		goto exit_reset;
 	}
 
+	rc = mv64xxx_i2c_init_recovery_info(drv_data, &pd->dev);
+	if (rc == -EPROBE_DEFER)
+		goto exit_reset;
+
 	drv_data->adapter.dev.parent = &pd->dev;
 	drv_data->adapter.algo = &mv64xxx_i2c_algo;
 	drv_data->adapter.owner = THIS_MODULE;