Merge tag 'char-misc-5.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc

Pull char/misc driver updates from Greg KH:
 "Here is the big set of char/misc/other driver patches for 5.7-rc1.

  Lots of things in here, and it's later than expected due to some
  reverts to resolve some reported issues. All is now clean with no
  reported problems in linux-next.

  Included in here is:
   - interconnect updates
   - mei driver updates
   - uio updates
   - nvmem driver updates
   - soundwire updates
   - binderfs updates
   - coresight updates
   - habanalabs updates
   - mhi new bus type and core
   - extcon driver updates
   - some Kconfig cleanups
   - other small misc driver cleanups and updates

  As mentioned, all have been in linux-next for a while, and with the
  last two reverts, all is calm and good"

* tag 'char-misc-5.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (174 commits)
  Revert "driver core: platform: Initialize dma_parms for platform devices"
  Revert "amba: Initialize dma_parms for amba devices"
  amba: Initialize dma_parms for amba devices
  driver core: platform: Initialize dma_parms for platform devices
  bus: mhi: core: Drop the references to mhi_dev in mhi_destroy_device()
  bus: mhi: core: Initialize bhie field in mhi_cntrl for RDDM capture
  bus: mhi: core: Add support for reading MHI info from device
  misc: rtsx: set correct pcr_ops for rts522A
  speakup: misc: Use dynamic minor numbers for speakup devices
  mei: me: add cedar fork device ids
  coresight: do not use the BIT() macro in the UAPI header
  Documentation: provide IBM contacts for embargoed hardware
  nvmem: core: remove nvmem_sysfs_get_groups()
  nvmem: core: use is_bin_visible for permissions
  nvmem: core: use device_register and device_unregister
  nvmem: core: add root_only member to nvmem device struct
  extcon: axp288: Add wakeup support
  extcon: Mark extcon_get_edev_name() function as exported symbol
  extcon: palmas: Hide error messages if gpio returns -EPROBE_DEFER
  dt-bindings: extcon: usbc-cros-ec: convert extcon-usbc-cros-ec.txt to yaml format
  ...

1 files changed, 47 insertions, 0 deletions

diff --git a/include/linux/soundwire/sdw.h b/include/linux/soundwire/sdw.h
index 2dfe14ed3bb0..00f5826092e3 100644
--- a/include/linux/soundwire/sdw.h
+++ b/include/linux/soundwire/sdw.h
@@ -80,6 +80,21 @@ enum sdw_slave_status {
 };
 
 /**
+ * enum sdw_clk_stop_type: clock stop operations
+ *
+ * @SDW_CLK_PRE_PREPARE: pre clock stop prepare
+ * @SDW_CLK_POST_PREPARE: post clock stop prepare
+ * @SDW_CLK_PRE_DEPREPARE: pre clock stop de-prepare
+ * @SDW_CLK_POST_DEPREPARE: post clock stop de-prepare
+ */
+enum sdw_clk_stop_type {
+	       SDW_CLK_PRE_PREPARE = 0,
+	       SDW_CLK_POST_PREPARE,
+	       SDW_CLK_PRE_DEPREPARE,
+	       SDW_CLK_POST_DEPREPARE,
+};
+
+/**
  * enum sdw_command_response - Command response as defined by SDW spec
  * @SDW_CMD_OK: cmd was successful
  * @SDW_CMD_IGNORED: cmd was ignored
@@ -426,6 +441,29 @@ struct sdw_slave_id {
 	__u8 sdw_version:4;
 };
 
+/*
+ * Helper macros to extract the MIPI-defined IDs
+ *
+ * Spec definition
+ *   Register		Bit	Contents
+ *   DevId_0 [7:4]	47:44	sdw_version
+ *   DevId_0 [3:0]	43:40	unique_id
+ *   DevId_1		39:32	mfg_id [15:8]
+ *   DevId_2		31:24	mfg_id [7:0]
+ *   DevId_3		23:16	part_id [15:8]
+ *   DevId_4		15:08	part_id [7:0]
+ *   DevId_5		07:00	class_id
+ *
+ * The MIPI DisCo for SoundWire defines in addition the link_id as bits 51:48
+ */
+
+#define SDW_DISCO_LINK_ID(adr)	(((adr) >> 48) & GENMASK(3, 0))
+#define SDW_VERSION(adr)	(((adr) >> 44) & GENMASK(3, 0))
+#define SDW_UNIQUE_ID(adr)	(((adr) >> 40) & GENMASK(3, 0))
+#define SDW_MFG_ID(adr)		(((adr) >> 24) & GENMASK(15, 0))
+#define SDW_PART_ID(adr)	(((adr) >> 8) & GENMASK(15, 0))
+#define SDW_CLASS_ID(adr)	((adr) & GENMASK(7, 0))
+
 /**
  * struct sdw_slave_intr_status - Slave interrupt status
  * @control_port: control port status
@@ -535,6 +573,11 @@ struct sdw_slave_ops {
 	int (*port_prep)(struct sdw_slave *slave,
 			 struct sdw_prepare_ch *prepare_ch,
 			 enum sdw_port_prep_ops pre_ops);
+	int (*get_clk_stop_mode)(struct sdw_slave *slave);
+	int (*clk_stop)(struct sdw_slave *slave,
+			enum sdw_clk_stop_mode mode,
+			enum sdw_clk_stop_type type);
+
 };
 
 /**
@@ -577,6 +620,7 @@ struct sdw_slave {
 #endif
 	struct list_head node;
 	struct completion *port_ready;
+	enum sdw_clk_stop_mode curr_clk_stop_mode;
 	u16 dev_num;
 	u16 dev_num_sticky;
 	bool probed;
@@ -894,6 +938,9 @@ int sdw_prepare_stream(struct sdw_stream_runtime *stream);
 int sdw_enable_stream(struct sdw_stream_runtime *stream);
 int sdw_disable_stream(struct sdw_stream_runtime *stream);
 int sdw_deprepare_stream(struct sdw_stream_runtime *stream);
+int sdw_bus_prep_clk_stop(struct sdw_bus *bus);
+int sdw_bus_clk_stop(struct sdw_bus *bus);
+int sdw_bus_exit_clk_stop(struct sdw_bus *bus);
 
 /* messaging and data APIs */