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Author SHA1 Message Date
Lingling Xu
1d00a67c2d spi: sprd: adi: Set BIT_WDG_NEW bit when rebooting 
When rebooting system, the PMIC watchdog time loading may not be loaded
correctly when another system is feeding the PMIC watchdog, since we did
not check the watchdog busy status before loading time values.

Thus we should set the BIT_WDG_NEW bit before loading time values, that
can support multiple loads without checking busy status to make sure the
time values can be loaded successfully to avoid this potential issue.

Signed-off-by: Lingling Xu <ling_ling.xu@unisoc.com>
Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
Link: https://lore.kernel.org/r/5655318a7252c9ea518c2f7950a61228ab8f42bf.1572257085.git.baolin.wang@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>
 2019-10-28 13:17:10 +00:00
Lingling Xu
91ea1d7060 spi: sprd: adi: Add missing lock protection when rebooting 
When rebooting the system, we should lock the watchdog after
configuration to make sure the watchdog can reboot the system
successfully.

Signed-off-by: Lingling Xu <ling_ling.xu@unisoc.com>
Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
Link: https://lore.kernel.org/r/7b04711127434555e3a1a86bc6be99860cd86668.1572257085.git.baolin.wang@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>
 2019-10-28 13:16:51 +00:00
Andy Shevchenko
6fb7427d84 spi: pxa2xx: Introduce temporary variables to increase readability 
The current conditional for PCI ID matching is hard to read.
Introduce couple of temporary variables to increase readability
of the code.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20191021103625.4250-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
 2019-10-25 11:09:53 +01:00
Alvaro Gamez Machado
e58f7d15e6 spi: xilinx: Add DT support for selecting transfer word width 
This core supports either 8, 16 or 32 bits as word width. This value is only
settable on instantiation, and thus we need to support any of them by means
of the device tree.

Signed-off-by: Alvaro Gamez Machado <alvaro.gamez@hazent.com>
Link: https://lore.kernel.org/r/20191024110757.25820-3-alvaro.gamez@hazent.com
Signed-off-by: Mark Brown <broonie@kernel.org>
 2019-10-24 12:45:21 +01:00
Alvaro Gamez Machado
e3354b17b4 spi: xilinx: add description of new property xlnx,num-transfer-bits 
This property is used to set the number of bits per transfer (bits_per_word).

Xilinx' IP core allows either 8, 16 or 32, and is non changeable on runtime,
only when instantiating the core.

Signed-off-by: Alvaro Gamez Machado <alvaro.gamez@hazent.com>
Link: https://lore.kernel.org/r/20191024110757.25820-2-alvaro.gamez@hazent.com
Signed-off-by: Mark Brown <broonie@kernel.org>
 2019-10-24 12:45:11 +01:00
Andy Shevchenko
be73e323ae spi: Fix spelling in the comments 
Two spelling mistakes are being fixed.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20191023121643.25237-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
 2019-10-23 17:49:19 +01:00
Alexandru Ardelean
a3470c1829 spi: document CS setup, hold & inactive times in header 
This change documents the CS setup, host & inactive times. They were
omitted when the fields were added, and were caught by one of the build
bots.

Fixes: 25093bdeb6 ("spi: implement SW control for CS times")
Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Link: https://lore.kernel.org/r/20191023070046.12478-1-alexandru.ardelean@analog.com
Signed-off-by: Mark Brown <broonie@kernel.org>
 2019-10-23 17:48:57 +01:00
Jarkko Nikula
c97905cae9 spi: dw-pci: Fix Chip Select amount on Intel Elkhart Lake PSE SPI 
Intel(R) Programmable Services Engine (Intel(R) PSE) SPI controllers in
Intel Elkhart Lake have two Chip Select signals instead of one.

Reported-by: Raymond Tan <raymond.tan@intel.com>
Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Link: https://lore.kernel.org/r/20191018132131.31608-3-jarkko.nikula@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
 2019-10-22 17:57:43 +01:00
Raymond Tan
c8169580e9 spi: dw-pci: Add runtime power management support 
Implement pm_runtime hooks at pci driver.

Signed-off-by: Raymond Tan <raymond.tan@intel.com>
[jarkko.nikula@linux.intel.com: Forward ported on top of
commit 1e69598325 ("spi: dw: Add basic runtime PM support")]
Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Link: https://lore.kernel.org/r/20191018132131.31608-2-jarkko.nikula@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
 2019-10-22 17:57:23 +01:00
Gregory CLEMENT
9c86f12a36 spi: atmel: Improve CS0 case support on AT91RM9200 
Thanks to the recent change in this driver, it is now possible to
prevent using the CS0 with GPIO during setup. It then allows to remove
the special handling of this case in the cs_activate() and
cs_deactivate() functions.

Signed-off-by: Gregory CLEMENT <gregory.clement@bootlin.com>
Link: https://lore.kernel.org/r/20191017141846.7523-8-gregory.clement@bootlin.com
Signed-off-by: Mark Brown <broonie@kernel.org>
 2019-10-18 18:34:23 +01:00
Gregory CLEMENT
57e3137710 spi: atmel: Improve and fix GPIO CS usage 
In the previous implementation of this driver, the index of the GPIO
used as CS was linked to the offset of the CS register used to
configure the transfer.

With this new implementation the first CS register not used by
internal CS is associated to all the GPIO CS. It allows to not be
anymore limited to have only 4 CS managed, now it is possible to have
in the same time until 3 internal CS and no more limit for the CS
GPIO.

Signed-off-by: Gregory CLEMENT <gregory.clement@bootlin.com>
Link: https://lore.kernel.org/r/20191017141846.7523-7-gregory.clement@bootlin.com
Signed-off-by: Mark Brown <broonie@kernel.org>
 2019-10-18 18:34:03 +01:00
Gregory CLEMENT
1cb84b02bf spi: atmel: Remove platform data support 
This driver is now only used through the device tree. Simplify code
by explicitly depend on device tree.

Signed-off-by: Gregory CLEMENT <gregory.clement@bootlin.com>
Link: https://lore.kernel.org/r/20191017141846.7523-6-gregory.clement@bootlin.com
Signed-off-by: Mark Brown <broonie@kernel.org>
 2019-10-18 18:33:40 +01:00
Gregory CLEMENT
60086e23e6 spi: atmel: Remove useless private field 
Since the conversion to GPIO descriptor, the GPIO used as chip select,
can be directly access from the spi_device struct. So there is no need
to keep the field npcs_pin.

Signed-off-by: Gregory CLEMENT <gregory.clement@bootlin.com>
Link: https://lore.kernel.org/r/20191017141846.7523-5-gregory.clement@bootlin.com
Signed-off-by: Mark Brown <broonie@kernel.org>
 2019-10-18 18:33:19 +01:00
Gregory CLEMENT
585d18f7eb spi: atmel: Configure GPIO per CS instead of by controller 
Instead of setting up the GPIO configuration for the whole controller,
do it at CS level. It will allow to mix internal CS and GPIO CS, which
is not possible with the current implementation.

Signed-off-by: Gregory CLEMENT <gregory.clement@bootlin.com>
Link: https://lore.kernel.org/r/20191017141846.7523-4-gregory.clement@bootlin.com
Signed-off-by: Mark Brown <broonie@kernel.org>
 2019-10-18 18:27:22 +01:00
Gregory CLEMENT
7cbb16b212 spi: atmel: Fix CS high support 
Until a few years ago, this driver was only used with CS GPIO. The
only exception is CS0 on AT91RM9200 which has to use internal CS. A
limitation of the internal CS is that they don't support CS High.

So by using the CS GPIO the CS high configuration was available except
for the particular case CS0 on RM9200.

When the support for the internal chip-select was added, the check of
the CS high support was not updated. Due to this the driver accepts
this configuration for all the SPI controller v2 (used by all SoCs
excepting the AT91RM9200) whereas the hardware doesn't support it for
infernal CS.

This patch fixes the test to match the hardware capabilities.

Fixes: 4820303480 ("spi: atmel: add support for the internal chip-select of the spi controller")
Cc: <stable@vger.kernel.org>
Signed-off-by: Gregory CLEMENT <gregory.clement@bootlin.com>
Link: https://lore.kernel.org/r/20191017141846.7523-3-gregory.clement@bootlin.com
Signed-off-by: Mark Brown <broonie@kernel.org>
 2019-10-18 18:27:01 +01:00
Gregory CLEMENT
4d8672d174 spi: atmel: Remove and fix erroneous comments 
Since CSAAT functionality support has been added. Some comments become
wrong. Fix them to match the current driver behavior.

Signed-off-by: Gregory CLEMENT <gregory.clement@bootlin.com>
Link: https://lore.kernel.org/r/20191017141846.7523-2-gregory.clement@bootlin.com
Signed-off-by: Mark Brown <broonie@kernel.org>
 2019-10-18 18:26:41 +01:00
Andy Shevchenko
ae8fbf1d24 spi: pxa2xx: Replace of_device.h with mod_devicetable.h and of.h 
There is nothing in use from of_device.h. The definitions and macros
are available thru mod_devicetable.h and of.h.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20191018105429.82782-5-andriy.shevchenko@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
 2019-10-18 18:26:09 +01:00
Andy Shevchenko
f2faa3ec79 spi: pxa2xx: Convert to use device_get_match_data() 
Convert to use device_get_match_data() instead of open coded variant.

While here, switch of_property_read_bool() to device_property_read_bool().

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20191018105429.82782-4-andriy.shevchenko@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
 2019-10-18 18:25:49 +01:00
Andy Shevchenko
365e856e18 spi: pxa2xx: Convert pxa2xx_spi_get_port_id() to take struct device 
This is preparatory patch before converting to use device_get_match_data() API.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20191018105429.82782-3-andriy.shevchenko@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
 2019-10-18 18:25:29 +01:00
Andy Shevchenko
5ce2570513 spi: pxa2xx: Sort headers 
Sort the headers in alphabetic order in order to ease the maintenance
for this part.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20191018105429.82782-2-andriy.shevchenko@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
 2019-10-18 18:25:10 +01:00
Andy Shevchenko
4f3d957718 spi: pxa2xx: No need to keep pointer to platform device 
There is no need to keep a pointer to the platform device. Currently there are
no users of it directly, and if there will be in the future we may restore it
from pointer to the struct device.

Convert all users at the same time.

Cc: Russell King <linux@armlinux.org.uk>
Cc: Jaroslav Kysela <perex@perex.cz>
Cc: Takashi Iwai <tiwai@suse.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20191018105429.82782-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
 2019-10-18 18:24:50 +01:00
Alexandru Ardelean
e74dc5c763 spi: use new spi_transfer_delay_exec helper where straightforward 
For many places in the spi drivers, using the new `spi_transfer_delay`
helper is straightforward.
It's just replacing:
```
  if (t->delay_usecs)
     udelay(t->delay_usecs);
```
with `spi_transfer_delay(t)` which handles both `delay_usecs` and the new
`delay` field.

This change replaces in all places (in the spi drivers)  where this change
is simple.

Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Link: https://lore.kernel.org/r/20190926105147.7839-10-alexandru.ardelean@analog.com
Signed-off-by: Mark Brown <broonie@kernel.org>
 2019-10-15 11:51:57 +01:00
Alexandru Ardelean
acc7720de3 spi: spi-axi: extend support for the delay field 
The AXI SPI engine driver uses the `delay_usecs` field from `spi_transfer`
to configure delays, which the controller will execute.
This change extends the logic to also include the `delay` value, in case it
is used (instead if `delay_usecs`).

Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Link: https://lore.kernel.org/r/20190926105147.7839-20-alexandru.ardelean@analog.com
Signed-off-by: Mark Brown <broonie@kernel.org>
 2019-10-15 11:47:26 +01:00
Alexandru Ardelean
c5751ba0f7 spi: bcm63xx: extend error condition to delay as well 
The driver errors out if `delay_usecs` is non-zero. This error condition
should be extended to the new `delay` field, to account for when it will be
used.

Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Link: https://lore.kernel.org/r/20190926105147.7839-19-alexandru.ardelean@analog.com
Signed-off-by: Mark Brown <broonie@kernel.org>
 2019-10-15 11:47:06 +01:00
Alexandru Ardelean
3e2405f01f spi: spi-falcon: extend warning to delay as well 
The WARN_ON macro prints a warning in syslog if `delay_usecs` is non-zero.
However, with the new intermediate `delay`, the warning should also be
printed.

Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Link: https://lore.kernel.org/r/20190926105147.7839-18-alexandru.ardelean@analog.com
Signed-off-by: Mark Brown <broonie@kernel.org>
 2019-10-15 11:46:57 +01:00