Merge branch 'i2c/for-5.5' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux

Pull i2c updates from Wolfram Sang:
 "I2C has mostly driver updates this time.

  The few noteworthy changes are: the core has now support for analog
  and digital filters with at91 being the first user, a core addition to
  replace the NULL returning i2c_new_probed_device() with an ERR_PTR
  variant, and the pxa driver has finally being moved to use the generic
  I2C slave interface. We have quite a significant number of reviews per
  patch this time, so thank you to all involved!"

* 'i2c/for-5.5' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: (37 commits)
  video: fbdev: matrox: convert to i2c_new_scanned_device
  i2c: icy: convert to i2c_new_scanned_device
  i2c: replace i2c_new_probed_device with an ERR_PTR variant
  i2c: Fix Kconfig indentation
  i2c: smbus: Don't filter out duplicate alerts
  i2c: i801: Correct Intel Jasper Lake SOC naming
  i2c: i2c-stm32f7: fix 10-bits check in slave free id search loop
  i2c: iproc: Add i2c repeated start capability
  i2c: remove helpers for ref-counting clients
  i2c: tegra: Use dma_request_chan() directly for channel request
  i2c: sh_mobile: Use dma_request_chan() directly for channel request
  i2c: qup: Use dma_request_chan() directly for channel request
  i2c: at91: Use dma_request_chan() directly for channel request
  i2c: rcar: Remove superfluous call to clk_get_rate()
  i2c: pxa: remove unused i2c-slave APIs
  i2c: pxa: migrate to new i2c_slave APIs
  i2c: cros-ec-tunnel: Make the device acpi compatible
  i2c: stm32f7: report dma error during probe
  i2c: icy: no need to populate address for scanned device
  i2c: xiic: Fix kerneldoc warnings
  ...

include/linux/i2c-pxa.h

@@ -1,18 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef _LINUX_I2C_ALGO_PXA_H
-#define _LINUX_I2C_ALGO_PXA_H
-
-typedef enum i2c_slave_event_e {
-	I2C_SLAVE_EVENT_START_READ,
-	I2C_SLAVE_EVENT_START_WRITE,
-	I2C_SLAVE_EVENT_STOP
-} i2c_slave_event_t;
-
-struct i2c_slave_client {
-	void *data;
-	void (*event)(void *ptr, i2c_slave_event_t event);
-	int  (*read) (void *ptr);
-	void (*write)(void *ptr, unsigned int val);
-};
-
-#endif /* _LINUX_I2C_ALGO_PXA_H */

include/linux/i2c.h

@@ -452,10 +452,16 @@ i2c_new_client_device(struct i2c_adapter *adap, struct i2c_board_info const *inf
  * a default probing method is used.
  */
 extern struct i2c_client *
+i2c_new_scanned_device(struct i2c_adapter *adap,
+		       struct i2c_board_info *info,
+		       unsigned short const *addr_list,
+		       int (*probe)(struct i2c_adapter *adap, unsigned short addr));
+
+extern struct i2c_client *
 i2c_new_probed_device(struct i2c_adapter *adap,
-		      struct i2c_board_info *info,
-		      unsigned short const *addr_list,
-		      int (*probe)(struct i2c_adapter *adap, unsigned short addr));
+		       struct i2c_board_info *info,
+		       unsigned short const *addr_list,
+		       int (*probe)(struct i2c_adapter *adap, unsigned short addr));
 
 /* Common custom probe functions */
 extern int i2c_probe_func_quick_read(struct i2c_adapter *adap, unsigned short addr);
@@ -575,6 +581,10 @@ struct i2c_lock_operations {
  * @scl_int_delay_ns: time IP core additionally needs to setup SCL in ns
  * @sda_fall_ns: time SDA signal takes to fall in ns; t(f) in the I2C specification
  * @sda_hold_ns: time IP core additionally needs to hold SDA in ns
+ * @digital_filter_width_ns: width in ns of spikes on i2c lines that the IP core
+ *	digital filter can filter out
+ * @analog_filter_cutoff_freq_hz: threshold frequency for the low pass IP core
+ *	analog filter
  */
 struct i2c_timings {
 	u32 bus_freq_hz;
@@ -583,6 +593,8 @@ struct i2c_timings {
 	u32 scl_int_delay_ns;
 	u32 sda_fall_ns;
 	u32 sda_hold_ns;
+	u32 digital_filter_width_ns;
+	u32 analog_filter_cutoff_freq_hz;
 };
 
 /**
@@ -844,9 +856,6 @@ extern void i2c_del_driver(struct i2c_driver *driver);
 #define i2c_add_driver(driver) \
 	i2c_register_driver(THIS_MODULE, driver)
 
-extern struct i2c_client *i2c_use_client(struct i2c_client *client);
-extern void i2c_release_client(struct i2c_client *client);
-
 /* call the i2c_client->command() of all attached clients with
  * the given arguments */
 extern void i2c_clients_command(struct i2c_adapter *adap,

include/linux/platform_data/i2c-pxa.h

@@ -55,11 +55,7 @@
  */
 #define I2C_ISR_INIT	0x7FF  /* status register init */
 
-struct i2c_slave_client;
-
 struct i2c_pxa_platform_data {
-	unsigned int		slave_addr;
-	struct i2c_slave_client	*slave;
 	unsigned int		class;
 	unsigned int		use_pio :1;
 	unsigned int		fast_mode :1;