linux-toradex.git/drivers/base/regmap, branch tegra-next

regmap: add support for non contiguous status to regmap-irq

2012-07-03T22:03:33+00:00

In some chips the IRQ status registers are not contiguous in the register
map but spaced at even spaces. This is an easy case to handle with minor
changes. It is assume for this purpose that the stride for status is
equal to the stride for mask/ack registers as well.

Signed-off-by: Graeme Gregory 
Signed-off-by: Mark Brown 
(cherry picked from commit 022f926a2401c80ed36ebb48a1bffbac08f34d98)
Change-Id: I68a59c8fd8a67062dac0eceaefcc85ed597f4a29
Reviewed-on: http://git-master/r/111484
Reviewed-by: Automatic_Commit_Validation_User
Tested-by: Pradeep Goudagunta 
GVS: Gerrit_Virtual_Submit
Reviewed-by: Laxman Dewangan

regmap: fix compile errors in regmap-irq.c due to stride changes

2012-04-15T22:03:44+00:00

Commit f01ee60fffa4 ("regmap: implement register striding") caused the
compile errors below. Fix them.

drivers/base/regmap/regmap-irq.c: In function 'regmap_irq_sync_unlock':
drivers/base/regmap/regmap-irq.c:62:12: error: 'map' undeclared (first use in this function)
drivers/base/regmap/regmap-irq.c:62:12: note: each undeclared identifier is reported only once for each function it appears in
drivers/base/regmap/regmap-irq.c: In function 'regmap_irq_enable':
drivers/base/regmap/regmap-irq.c:77:37: error: 'map' undeclared (first use in this function)
drivers/base/regmap/regmap-irq.c: In function 'regmap_irq_disable':
drivers/base/regmap/regmap-irq.c:85:37: error: 'map' undeclared (first use in this function)

Signed-off-by: Stephen Warren 
Signed-off-by: Mark Brown 
(cherry picked from commit 56806555de5485d6786bf0f8df01b8ed9fc5d006)

Change-Id: I1b0787c81695ddbfb081a1342690a44162474574
Signed-off-by: Laxman Dewangan 
Reviewed-on: http://git-master/r/96511
Reviewed-by: Simone Willett 
Tested-by: Simone Willett

regmap: implement register striding

2012-04-15T21:58:10+00:00

regmap_config.reg_stride is introduced. All extant register addresses
are a multiple of this value. Users of serial-oriented regmap busses will
typically set this to 1. Users of the MMIO regmap bus will typically set
this based on the value size of their registers, in bytes, so 4 for a
32-bit register.

Throughout the regmap code, actual register addresses are used. Wherever
the register address is used to index some array of values, the address
is divided by the stride to determine the index, or vice-versa. Error-
checking is added to all entry-points for register address data to ensure
that register addresses actually satisfy the specified stride. The MMIO
bus ensures that the specified stride is large enough for the register
size.

Signed-off-by: Stephen Warren 
Signed-off-by: Mark Brown 
(cherry picked from commit f01ee60fffa4dc6c77122121233a793f7f696e67)

Change-Id: I634977dcb0fe9ff95c7932e9195a2c1918eb1c18
Signed-off-by: Laxman Dewangan 
Reviewed-on: http://git-master/r/96510
Reviewed-by: Simone Willett 
Tested-by: Simone Willett

regmap: fix compilation when !CONFIG_DEBUG_FS

2012-04-15T21:52:56+00:00

Commit 79c64d5 "regmap: allow regmap instances to be named" changed the
prototype of regmap_debugfs_init, but didn't update the dummy inline used
when !CONFIG_DEBUGFS. Fix this.

Signed-off-by: Stephen Warren 
Signed-off-by: Mark Brown 
(cherry picked from commit abec95adefaeb2229cb28de65f3d32cd149b9dd9)

Change-Id: Ieb049fa9ed0dd26d21a37592ecb25488b0909c0b
Signed-off-by: Laxman Dewangan 
Reviewed-on: http://git-master/r/96509
Reviewed-by: Simone Willett 
Tested-by: Simone Willett

regmap: allow regmap instances to be named

2012-04-15T21:47:14+00:00

Some devices have multiple separate register regions. Logically, one
regmap would be created per region. One issue that prevents this is that
each instance will attempt to create the same debugfs files. Avoid this
by allowing regmaps to be named, and use the name to construct the
debugfs directory name.

Signed-off-by: Stephen Warren 
Signed-off-by: Mark Brown 
cherry-picked form mainline d3c242e

Change-Id: Ia3301fb4d28645f1d3593e547f9409ce20c0acfe
Signed-off-by: Laxman Dewangan 
Reviewed-on: http://git-master/r/96508
Reviewed-by: Simone Willett 
Tested-by: Simone Willett

regmap: validate regmap_raw_read/write val_len

2012-04-15T21:41:12+00:00

val_len should be a multiple of val_bytes. If it's not, error out early.

Signed-off-by: Stephen Warren 
Signed-off-by: Mark Brown 
(cherry picked from commit 851960ba7cb38a6a108d102e4c8b0ab702972e22)

Change-Id: Ic17d4bd832b5ea3e426d00ff5d0ae342b8abba45
Signed-off-by: Laxman Dewangan 
Reviewed-on: http://git-master/r/96507
Reviewed-by: Simone Willett 
Tested-by: Simone Willett

regmap: mmio: remove some error checks now in the core

2012-04-15T21:35:35+00:00

These error checks are implemented in regmap core. Remove the duplicate
code from regmap-mmio.c

Signed-off-by: Stephen Warren 
Signed-off-by: Mark Brown 
(cherry picked from commit 9878647f4349dbaa46b4026ed9bbf8acfc0de34c)

Change-Id: I32979da1bbca852470c0cb8d8d997b2c77d6703f
Signed-off-by: Laxman Dewangan 
Reviewed-on: http://git-master/r/96506
Reviewed-by: Simone Willett 
Tested-by: Simone Willett

regmap: mmio: convert some error returns to BUG()

2012-04-15T21:29:07+00:00

Some of the error conditions detected by regmap_mmio_*() are pure internal
errors, rather than user-/client-triggerable conditions. Convert these to
BUG().

Signed-off-by: Stephen Warren 
Signed-off-by: Mark Brown 
(cherry picked from commit 40606dba450830e50420599c52a86cf6ce5c6a14)

Change-Id: Ibf926ca6774e4b3d3dd855d42814065858318628
Signed-off-by: Laxman Dewangan 
Reviewed-on: http://git-master/r/96505
Reviewed-by: Simone Willett 
Tested-by: Simone Willett

regmap: add MMIO bus support

2012-04-15T21:23:47+00:00

This is a basic memory-mapped-IO bus for regmap. It has the following
features and limitations:

* Registers themselves may be 8, 16, 32, or 64-bit. 64-bit is only
  supported on 64-bit platforms.
* Register offsets are limited to precisely 32-bit.
* IO is performed using readl/writel, with no provision for using the
  __raw_readl or readl_relaxed variants.

Signed-off-by: Stephen Warren 
Signed-off-by: Mark Brown 
(cherry picked from commit 45f5ff8107a845854b1d1812ab1d9c5541f08b4d)

Change-Id: Ia84cf3fec838ee687e5b77ce771fc2450abe8436
Signed-off-by: Laxman Dewangan 
Reviewed-on: http://git-master/r/96504
Reviewed-by: Simone Willett 
Tested-by: Simone Willett

regmap: introduce fast_io busses, and use a spinlock for them

2012-04-15T21:18:17+00:00

Some bus types have very fast IO. For these, acquiring a mutex for every
IO operation is a significant overhead. Allow busses to indicate their IO
is fast, and enhance regmap to use a spinlock for those busses.

[Currently limited to native endian registers -- broonie]

Signed-off-by: Stephen Warren 
Signed-off-by: Mark Brown 
(cherry picked from commit bacdbe077342ecc9e7b3e374cc5a41995116706a)

Change-Id: I337f27a09f2b176b46e8f6d05401957a1abc0609
Signed-off-by: Laxman Dewangan 
Reviewed-on: http://git-master/r/96503
Reviewed-by: Simone Willett 
Tested-by: Simone Willett