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

Pull i2c fixes from Wolfram Sang:
 "Mostly driver bugfixes, but also a few cleanups which are nice to have
  out of the way"

* 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
  i2c: rk3x: Restore clock settings at resume time
  i2c: Spelling s/acknowedge/acknowledge/
  i2c: designware: save the preset value of DW_IC_SDA_HOLD
  Documentation: i2c: slave-interface: add note for driver development
  i2c: mux: demux-pinctrl: run properly with multiple instances
  i2c: bcm-kona: fix inconsistent indenting
  i2c: rcar: use proper device with dma_mapping_error
  i2c: sh_mobile: use proper device with dma_mapping_error
  i2c: mux: demux-pinctrl: invalidate properly when switching fails

1 files changed, 13 insertions, 1 deletions

diff --git a/drivers/i2c/busses/i2c-rk3x.c b/drivers/i2c/busses/i2c-rk3x.c
index 2bc8b01153d6..5c5b7cada8be 100644
--- a/drivers/i2c/busses/i2c-rk3x.c
+++ b/drivers/i2c/busses/i2c-rk3x.c
@@ -918,7 +918,7 @@ static void rk3x_i2c_adapt_div(struct rk3x_i2c *i2c, unsigned long clk_rate)
  * Code adapted from i2c-cadence.c.
  *
  * Return:	NOTIFY_STOP if the rate change should be aborted, NOTIFY_OK
- *		to acknowedge the change, NOTIFY_DONE if the notification is
+ *		to acknowledge the change, NOTIFY_DONE if the notification is
  *		considered irrelevant.
  */
 static int rk3x_i2c_clk_notifier_cb(struct notifier_block *nb, unsigned long
@@ -1111,6 +1111,15 @@ static int rk3x_i2c_xfer(struct i2c_adapter *adap,
 	return ret < 0 ? ret : num;
 }
 
+static __maybe_unused int rk3x_i2c_resume(struct device *dev)
+{
+	struct rk3x_i2c *i2c = dev_get_drvdata(dev);
+
+	rk3x_i2c_adapt_div(i2c, clk_get_rate(i2c->clk));
+
+	return 0;
+}
+
 static u32 rk3x_i2c_func(struct i2c_adapter *adap)
 {
 	return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL | I2C_FUNC_PROTOCOL_MANGLING;
@@ -1334,12 +1343,15 @@ static int rk3x_i2c_remove(struct platform_device *pdev)
 	return 0;
 }
 
+static SIMPLE_DEV_PM_OPS(rk3x_i2c_pm_ops, NULL, rk3x_i2c_resume);
+
 static struct platform_driver rk3x_i2c_driver = {
 	.probe   = rk3x_i2c_probe,
 	.remove  = rk3x_i2c_remove,
 	.driver  = {
 		.name  = "rk3x-i2c",
 		.of_match_table = rk3x_i2c_match,
+		.pm = &rk3x_i2c_pm_ops,
 	},
 };