Merge tag 'regmap-v6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap

Pull regmap updates from Mark Brown:
 "This is a much bigger change for regmap than is normal, the main
  things being the addition of some KUnit coverage and a maple tree
  based register cache which longer term is likely to replace the rbtree
  cache except possibly for very small register maps.

  While it's complete overkill for most applications the code for maple
  trees is there and there are some larger, sparser devices where the
  data structure is a better fit.

  The maple tree support is still a work in progress but already useful,
  there's some conversions of drivers ready to go after the merge
  window.

  Summary:

   - Support for shifting register addresses up as well as down, there's
     a use cases with memory mapped MDIO.

   - Refactoring of the type configuration in regmap-irq to allow access
     to driver data in the handler, needed by some GPIO devices.

   - Some initial KUnit coverage, the bulk of the driver facing API is
     covered but there's holes and things like the data marshalling for
     bytestream buses are just not covered in the slightest.

   - Removal of the compressed cache type, it had zero users and was
     getting in the way of KUnit.

   - Addition of a maple tree based register cache, there's more work to
     do but it's already useful for some devices with a flatter data
     structure than rbtree and getting to use all the optimisation work
     Liam is doing"

* tag 'regmap-v6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap:
  regmap: allow upshifting register addresses before performing operations
  regmap: Pass irq_drv_data as a parameter for set_type_config()
  regmap: Use mas_walk() instead of mas_find()
  regmap: Fix double unlock in the maple cache
  regmap: Add maple tree based register cache
  regmap: Factor out single value register syncing
  regmap: Add some basic kunit tests
  regmap: Add RAM backed register map
  regmap: Removed compressed cache support
  regmap: Support paging for buses with reg_read()/reg_write()
  regmap: Clarify error for unknown cache types
  regmap: Handle sparse caches in the default sync
  regmap: add a helper to translate the register address
  regmap: cache: Silence checkpatch warning
  regmap: cache: Return error in cache sync operations for REGCACHE_NONE
  regmap-irq: Place kernel doc of struct regmap_irq_chip in order
  regmap-irq: Add no_status support
  regmap: sdw: Remove 8-bit value size restriction
  regmap: sdw: Update misleading comment

1 files changed, 26 insertions, 10 deletions

diff --git a/include/linux/regmap.h b/include/linux/regmap.h
index 4d10790adeb0..c2b9cc5db824 100644
--- a/include/linux/regmap.h
+++ b/include/linux/regmap.h
@@ -46,12 +46,20 @@ struct sdw_slave;
 #define REGMAP_MDIO_C45_DEVAD_MASK	GENMASK(20, 16)
 #define REGMAP_MDIO_C45_REGNUM_MASK	GENMASK(15, 0)
 
+/*
+ * regmap.reg_shift indicates by how much we must shift registers prior to
+ * performing any operation. It's a signed value, positive numbers means
+ * downshifting the register's address, while negative numbers means upshifting.
+ */
+#define REGMAP_UPSHIFT(s)	(-(s))
+#define REGMAP_DOWNSHIFT(s)	(s)
+
 /* An enum of all the supported cache types */
 enum regcache_type {
 	REGCACHE_NONE,
 	REGCACHE_RBTREE,
-	REGCACHE_COMPRESSED,
 	REGCACHE_FLAT,
+	REGCACHE_MAPLE,
 };
 
 /**
@@ -246,8 +254,9 @@ typedef void (*regmap_unlock)(void *);
  * @reg_stride: The register address stride. Valid register addresses are a
  *              multiple of this value. If set to 0, a value of 1 will be
  *              used.
- * @reg_downshift: The number of bits to downshift the register before
- *		   performing any operations.
+ * @reg_shift: The number of bits to shift the register before performing any
+ *	       operations. Any positive number will be downshifted, and negative
+ *	       values will be upshifted
  * @reg_base: Value to be added to every register address before performing any
  *	      operation.
  * @pad_bits: Number of bits of padding between register and value.
@@ -381,7 +390,7 @@ struct regmap_config {
 
 	int reg_bits;
 	int reg_stride;
-	int reg_downshift;
+	int reg_shift;
 	unsigned int reg_base;
 	int pad_bits;
 	int val_bits;
@@ -1551,6 +1560,7 @@ struct regmap_irq_chip_data;
  * @use_ack:     Use @ack register even if it is zero.
  * @ack_invert:  Inverted ack register: cleared bits for ack.
  * @clear_ack:  Use this to set 1 and 0 or vice-versa to clear interrupts.
+ * @status_invert: Inverted status register: cleared bits are active interrupts.
  * @wake_invert: Inverted wake register: cleared bits are wake enabled.
  * @type_in_mask: Use the mask registers for controlling irq type. Use this if
  *		  the hardware provides separate bits for rising/falling edge
@@ -1560,18 +1570,20 @@ struct regmap_irq_chip_data;
  * @clear_on_unmask: For chips with interrupts cleared on read: read the status
  *                   registers before unmasking interrupts to clear any bits
  *                   set when they were masked.
+ * @runtime_pm:  Hold a runtime PM lock on the device when accessing it.
  * @not_fixed_stride: Used when chip peripherals are not laid out with fixed
  *		      stride. Must be used with sub_reg_offsets containing the
  *		      offsets to each peripheral. Deprecated; the same thing
  *		      can be accomplished with a @get_irq_reg callback, without
  *		      the need for a @sub_reg_offsets table.
- * @status_invert: Inverted status register: cleared bits are active interrupts.
- * @runtime_pm:  Hold a runtime PM lock on the device when accessing it.
+ * @no_status: No status register: all interrupts assumed generated by device.
  *
  * @num_regs:    Number of registers in each control bank.
+ *
  * @irqs:        Descriptors for individual IRQs.  Interrupt numbers are
  *               assigned based on the index in the array of the interrupt.
  * @num_irqs:    Number of descriptors.
+ *
  * @num_type_reg:    Number of type registers. Deprecated, use config registers
  *		     instead.
  * @num_virt_regs:   Number of non-standard irq configuration registers.
@@ -1579,6 +1591,7 @@ struct regmap_irq_chip_data;
  *		     instead.
  * @num_config_bases:	Number of config base registers.
  * @num_config_regs:	Number of config registers for each config base register.
+ *
  * @handle_pre_irq:  Driver specific callback to handle interrupt from device
  *		     before regmap_irq_handler process the interrupts.
  * @handle_post_irq: Driver specific callback to handle interrupt from device
@@ -1625,12 +1638,13 @@ struct regmap_irq_chip {
 	unsigned int use_ack:1;
 	unsigned int ack_invert:1;
 	unsigned int clear_ack:1;
+	unsigned int status_invert:1;
 	unsigned int wake_invert:1;
-	unsigned int runtime_pm:1;
 	unsigned int type_in_mask:1;
 	unsigned int clear_on_unmask:1;
+	unsigned int runtime_pm:1;
 	unsigned int not_fixed_stride:1;
-	unsigned int status_invert:1;
+	unsigned int no_status:1;
 
 	int num_regs;
 
@@ -1650,7 +1664,8 @@ struct regmap_irq_chip {
 	int (*set_type_virt)(unsigned int **buf, unsigned int type,
 			     unsigned long hwirq, int reg);
 	int (*set_type_config)(unsigned int **buf, unsigned int type,
-			       const struct regmap_irq *irq_data, int idx);
+			       const struct regmap_irq *irq_data, int idx,
+			       void *irq_drv_data);
 	unsigned int (*get_irq_reg)(struct regmap_irq_chip_data *data,
 				    unsigned int base, int index);
 	void *irq_drv_data;
@@ -1659,7 +1674,8 @@ struct regmap_irq_chip {
 unsigned int regmap_irq_get_irq_reg_linear(struct regmap_irq_chip_data *data,
 					   unsigned int base, int index);
 int regmap_irq_set_type_config_simple(unsigned int **buf, unsigned int type,
-				      const struct regmap_irq *irq_data, int idx);
+				      const struct regmap_irq *irq_data,
+				      int idx, void *irq_drv_data);
 
 int regmap_add_irq_chip(struct regmap *map, int irq, int irq_flags,
 			int irq_base, const struct regmap_irq_chip *chip,