fsi: Add regmap and refactor sbefifo

Merge series from Eddie James <[email protected]>:

The SBEFIFO hardware can now be attached over a new I2C endpoint interface
called the I2C Responder (I2CR). In order to use the existing SBEFIFO
driver, add a regmap driver for the FSI bus and an endpoint driver for the
I2CR. Then, refactor the SBEFIFO and OCC drivers to clean up and use the
new regmap driver or the I2CR interface.

This branch just has the regmap change so it can be shared with the FSI
code.

1 files changed, 16 insertions, 22 deletions

diff --git a/include/linux/overflow.h b/include/linux/overflow.h
index 19dfdd74835e..1d3be1a2204c 100644
--- a/include/linux/overflow.h
+++ b/include/linux/overflow.h
@@ -51,8 +51,8 @@ static inline bool __must_check __must_check_overflow(bool overflow)
 	return unlikely(overflow);
 }
 
-/** check_add_overflow() - Calculate addition with overflow checking
- *
+/**
+ * check_add_overflow() - Calculate addition with overflow checking
  * @a: first addend
  * @b: second addend
  * @d: pointer to store sum
@@ -66,8 +66,8 @@ static inline bool __must_check __must_check_overflow(bool overflow)
 #define check_add_overflow(a, b, d)	\
 	__must_check_overflow(__builtin_add_overflow(a, b, d))
 
-/** check_sub_overflow() - Calculate subtraction with overflow checking
- *
+/**
+ * check_sub_overflow() - Calculate subtraction with overflow checking
  * @a: minuend; value to subtract from
  * @b: subtrahend; value to subtract from @a
  * @d: pointer to store difference
@@ -81,8 +81,8 @@ static inline bool __must_check __must_check_overflow(bool overflow)
 #define check_sub_overflow(a, b, d)	\
 	__must_check_overflow(__builtin_sub_overflow(a, b, d))
 
-/** check_mul_overflow() - Calculate multiplication with overflow checking
- *
+/**
+ * check_mul_overflow() - Calculate multiplication with overflow checking
  * @a: first factor
  * @b: second factor
  * @d: pointer to store product
@@ -96,23 +96,24 @@ static inline bool __must_check __must_check_overflow(bool overflow)
 #define check_mul_overflow(a, b, d)	\
 	__must_check_overflow(__builtin_mul_overflow(a, b, d))
 
-/** check_shl_overflow() - Calculate a left-shifted value and check overflow
- *
+/**
+ * check_shl_overflow() - Calculate a left-shifted value and check overflow
  * @a: Value to be shifted
  * @s: How many bits left to shift
  * @d: Pointer to where to store the result
  *
  * Computes *@d = (@a << @s)
  *
- * Returns true if '*d' cannot hold the result or when 'a << s' doesn't
+ * Returns true if '*@d' cannot hold the result or when '@a << @s' doesn't
  * make sense. Example conditions:
- * - 'a << s' causes bits to be lost when stored in *d.
- * - 's' is garbage (e.g. negative) or so large that the result of
- *   'a << s' is guaranteed to be 0.
- * - 'a' is negative.
- * - 'a << s' sets the sign bit, if any, in '*d'.
  *
- * '*d' will hold the results of the attempted shift, but is not
+ * - '@a << @s' causes bits to be lost when stored in *@d.
+ * - '@s' is garbage (e.g. negative) or so large that the result of
+ *   '@a << @s' is guaranteed to be 0.
+ * - '@a' is negative.
+ * - '@a << @s' sets the sign bit, if any, in '*@d'.
+ *
+ * '*@d' will hold the results of the attempted shift, but is not
  * considered "safe for use" if true is returned.
  */
 #define check_shl_overflow(a, s, d) __must_check_overflow(({		\
@@ -129,7 +130,6 @@ static inline bool __must_check __must_check_overflow(bool overflow)
 
 /**
  * size_mul() - Calculate size_t multiplication with saturation at SIZE_MAX
- *
  * @factor1: first factor
  * @factor2: second factor
  *
@@ -149,7 +149,6 @@ static inline size_t __must_check size_mul(size_t factor1, size_t factor2)
 
 /**
  * size_add() - Calculate size_t addition with saturation at SIZE_MAX
- *
  * @addend1: first addend
  * @addend2: second addend
  *
@@ -169,7 +168,6 @@ static inline size_t __must_check size_add(size_t addend1, size_t addend2)
 
 /**
  * size_sub() - Calculate size_t subtraction with saturation at SIZE_MAX
- *
  * @minuend: value to subtract from
  * @subtrahend: value to subtract from @minuend
  *
@@ -192,7 +190,6 @@ static inline size_t __must_check size_sub(size_t minuend, size_t subtrahend)
 
 /**
  * array_size() - Calculate size of 2-dimensional array.
- *
  * @a: dimension one
  * @b: dimension two
  *
@@ -205,7 +202,6 @@ static inline size_t __must_check size_sub(size_t minuend, size_t subtrahend)
 
 /**
  * array3_size() - Calculate size of 3-dimensional array.
- *
  * @a: dimension one
  * @b: dimension two
  * @c: dimension three
@@ -220,7 +216,6 @@ static inline size_t __must_check size_sub(size_t minuend, size_t subtrahend)
 /**
  * flex_array_size() - Calculate size of a flexible array member
  *                     within an enclosing structure.
- *
  * @p: Pointer to the structure.
  * @member: Name of the flexible array member.
  * @count: Number of elements in the array.
@@ -237,7 +232,6 @@ static inline size_t __must_check size_sub(size_t minuend, size_t subtrahend)
 
 /**
  * struct_size() - Calculate size of structure with trailing flexible array.
- *
  * @p: Pointer to the structure.
  * @member: Name of the array member.
  * @count: Number of elements in the array.