linux-toradex.git/drivers/mfd/stmpe.c, branch v5.11-rc3

mfd: stmpe: Constify static struct resource

2020-11-19T08:34:21+00:00

Constify a couple of static struct resource. The only usage of the
structs is to assign their address to the resources field in the
mfd_cell struct. This allows the compiler to put them in read-only
memory. Done with the help of Coccinelle.

Signed-off-by: Rikard Falkeborn 
Signed-off-by: Lee Jones

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 464

2019-06-19T15:09:10+00:00

Based on 1 normalized pattern(s):

  license terms gnu general public license version 2

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-only

has been chosen to replace the boilerplate/reference in 11 file(s).

Signed-off-by: Thomas Gleixner 
Reviewed-by: Allison Randal 
Reviewed-by: Enrico Weigelt 
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190604081202.373849232@linutronix.de
Signed-off-by: Greg Kroah-Hartman

Merge branches 'ib-mfd-iio-input-5.1', 'ib-mfd-input-watchdog-5.1' and 'ib-mfd-platform-5.1' into ibs-for-mfd-merged

2019-02-01T08:20:04+00:00

mfd: stmpe: Preparations for STMPE ADC driver

2019-01-16T12:36:12+00:00

This prepares the MFD for the STMPE ADC driver. This commit introduces
devicetree settings that are used by the ADC and adds an init function.
Common ADC settings that are shared with the touchscreen driver can now
reside in the overlying MFD.

Signed-off-by: Stefan Agner 
Signed-off-by: Max Krummenacher 
Signed-off-by: Philippe Schenker 
Signed-off-by: Lee Jones

mfd: Use of_node_name_eq() for node name comparisons

2019-01-03T08:32:42+00:00

Convert string compares of DT node names to use of_node_name_eq() helper
instead. This removes direct access to the node name pointer.

Signed-off-by: Rob Herring 
Signed-off-by: Lee Jones

mfd: stmpe: Fix bit clearing on STMPE1600

2017-04-27T08:25:07+00:00

GPIO bits clearing on pins assigned to STMPE1600
had no effects due to missing "clear registers"
settings within stmpe1600_regs[].
STMPE1600 does not have dedicated "clear registers",
but single "set/clear registers", hence stmpe1600_regs[]
"clear registers" (STMPE_IDX_GPCR_XXX) must be set to
same value as "set registers" (STMPE_IDX_GPSR_XXX), ie
STMPE1600_REG_GPSR_XXX.

Signed-off-by: Hugues Fruchet 
Reviewed-by: Patrice Chotard 
Signed-off-by: Lee Jones

mfd: stmpe: Fix RESET regression on STMPE2401

2016-11-16T09:50:33+00:00

Since commit c4dd1ba355aae2bc3d1213da6c66c53e3c31e028
("mfd: stmpe: Add reset support for all STMPE variant")
we're resetting the STMPE expanders before use.

This caused a regression on the STMP2401 on the Nomadik
NHK8815:

stmpe-i2c 0-0043: stmpe2401 detected, chip id: 0x101
nmk-i2c 101f8000.i2c0: write to slave 0x43 timed out
nmk-i2c 101f8000.i2c0: no ack received after address transmission
stmpe-i2c 0-0044: stmpe2401 detected, chip id: 0x101
nmk-i2c 101f8000.i2c0: write to slave 0x44 timed out
nmk-i2c 101f8000.i2c0: no ack received after address transmission

It turns out that we start to poll for the reset bit to
go low again too quickly: the STMPE2401 is not yet online and
ready to be asked for the status of the RESET bit.

By introducing a 10ms delay before starting to hammer
the register for information, we get back to normal:

stmpe-i2c 0-0043: stmpe2401 detected, chip id: 0x101
stmpe-i2c 0-0044: stmpe2401 detected, chip id: 0x101

Cc: stable@vger.kernel.org
Cc: Amelie Delaunay 
Fixes: c4dd1ba355aa ("mfd: stmpe: Add reset support for all STMPE variant")
Signed-off-by: Linus Walleij 
Acked-by: Patrice Chotard 
Signed-off-by: Lee Jones

mfd: Add STMPE1600 support

2016-08-10T08:25:18+00:00

STMPE1600 is a 16-bit port expander.
Datasheet is available here :
http://www2.st.com/content/st_com/en/products/interfaces-and-transceivers/
i-o-expanders-and-level-translators/i-o-expanders/stmpe1600.html

Signed-off-by: Amelie DELAUNAY 
Signed-off-by: Patrice Chotard 
Acked-by: Linus Walleij 
Signed-off-by: Lee Jones

mfd: stmpe: Rework registers access

2016-08-10T08:24:39+00:00

this update allows to use registers map as following :
regs[reg_index + offset] instead of
regs[reg_index] + offset

This makes code clearer and will facilitate the addition of STMPE1600
on which LSB and MSB registers are respectively located at addr and addr + 1.
Despite for all others STMPE variant, LSB and MSB registers are respectively
located in reverse order at addr + 1 and addr.

For variant which have 3 registers's bank, we use LSB,CSB and MSB indexes
which contains respectively LSB (or LOW), CSB (or MID) and MSB (or HIGH)
register addresses (STMPE1801/STMPE24xx).
For variant which have 2 registers's bank, we use LSB and CSB indexes only.
In this case the CSB index contains the MSB regs address (STMPE 1601).

Signed-off-by: Patrice Chotard 
Reviewed-by: Linus Walleij 
Signed-off-by: Lee Jones

mfd: stmpe: Use generic bit mask name

2016-08-10T08:24:29+00:00

In order to prepare the ground to STMPE1600,
as STMPE1600's SYS_CTRL register has the same layout as
STMPE801 variant, unify STMPExxx_REG_SYS_CTRL_RESET/INT_EN/INT_HI
bit masks to more generic STMPE_SYS_CTRL_RESET/INT_EN/INT_HI

Signed-off-by: Patrice Chotard 
Signed-off-by: Lee Jones