linux.git/drivers/soc/imx, branch v4.14

soc: imx: gpcv2: fix regulator deferred probe

2017-08-05T03:12:20+00:00

If a regulator requests a deferred probe, the power domain gets
initialized twice. This leads to a list double add (without
list debugging the kernel hangs due to the double add later):

  WARNING: CPU: 0 PID: 19 at lib/list_debug.c:31 __list_add_valid+0xbc/0xc4
  list_add double add: new=c1229754, prev=c12383b4, next=c1229754.

Initialize the power domain after we get the regulator. Also do
not print an error in case the regulator defers probing.

Cc: Fabio Estevam 
Cc: Andrey Smirnov 
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
Fixes: 03aa12629fc4 ("soc: imx: Add GPCv2 power gating driver")
Signed-off-by: Stefan Agner 
Acked-by: Andrey Smirnov 
Tested-by: Andrey Smirnov 
Signed-off-by: Shawn Guo

Merge tag 'imx-drivers-4.13' of git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux into next/drivers

2017-06-19T06:05:10+00:00

The i.MX drivers update for 4.13:
 - Add CONFIG_HAVE_IMX_GPC to control the build of GPC driver, so that
   it doesn't build for platforms that do not have it.

* tag 'imx-drivers-4.13' of git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux:
  soc: imx: gpc: build gpc only if hardware has gpc

Signed-off-by: Olof Johansson

soc: imx: gpc: build gpc only if hardware has gpc

2017-05-15T02:22:25+00:00

Add CONFIG_HAVE_IMX_GPC to goal definition of gpc.o,
to avoid building it for hardware that does not need it.

Signed-off-by: Marc Ohlf 
Reviewed-by: Lucas Stach 
Signed-off-by: Shawn Guo

soc: imx: add PM dependency for IMX7_PM_DOMAINS

2017-05-15T01:33:22+00:00

The new pm domain driver causes a build failure when CONFIG_PM
is not set:

warning: (IMX7_PM_DOMAINS) selects PM_GENERIC_DOMAINS which has unmet direct dependencies (PM)
drivers/base/power/domain_governor.c: In function 'default_suspend_ok':
drivers/base/power/domain_governor.c:75:17: error: 'struct dev_pm_info' has no member named 'ignore_children'

This adds a dependency to ensure that we don't attempt to build the
driver without CONFIG_PM.

Fixes: 03aa12629fc4 ("soc: imx: Add GPCv2 power gating driver")
Signed-off-by: Arnd Bergmann 
Reviewed-by: Fabio Estevam 
Signed-off-by: Shawn Guo

soc: imx: gpc: add workaround for i.MX6QP to the GPC PD driver

2017-04-07T12:47:34+00:00

On i.MX6QP, due to hardware erratum ERR009619, the PRE clocks may be
stalled during the power up sequencing of the PU power domain. As this
may lead to a complete loss of display output, the recommended
workaround is to keep the PU domain enabled during normal system
operation.

Implement this by rejecting the domain power down request on the
affected SoC.

Signed-off-by: Lucas Stach 
Signed-off-by: Shawn Guo

soc: imx: gpc: add defines for domain index

2017-04-07T12:47:24+00:00

Makes referencing a specfic domain in the driver code
less error prone.

Signed-off-by: Lucas Stach 
Signed-off-by: Shawn Guo

soc: imx: Add GPCv2 power gating driver

2017-04-07T11:37:07+00:00

Add code allowing for control of various power domains managed by GPCv2
IP block found in i.MX7 series of SoCs. Power domains covered by this
patch are:

    - PCIE PHY
    - MIPI PHY
    - USB HSIC PHY
    - USB OTG1/2 PHY

Support for any other power domain controlled by GPC is not present, and
can be added at some later point.

Testing of this code was done against a PCIe driver.

Cc: yurovsky@gmail.com
Cc: Lucas Stach 
Cc: Fabio Estevam 
Cc: Dong Aisheng 
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Andrey Smirnov 
Signed-off-by: Shawn Guo

soc: imx: gpc: remove unnecessary readable_reg callback

2017-03-24T05:43:21+00:00

It is not really necessary to provide the current .readable_reg
implementation as we know what we're doing in our driver
and the regmap core has already done the partial check for
available maximum regs.

Acked-by: Lucas Stach 
Signed-off-by: Dong Aisheng 
Signed-off-by: Shawn Guo

soc: imx: gpc: keep PGC_X_CTRL name align with reference manual

2017-03-24T05:43:10+00:00

Instead of GPC_PGC_PDN_OFFS, naming it as GPC_PGC_CTRL_OFFS which is
defined in reference manual for better reading.

Reviewed-by: Lucas Stach 
Signed-off-by: Dong Aisheng 
Signed-off-by: Shawn Guo

soc: imx: gpc: fix comment when power up domain

2017-03-24T05:43:04+00:00

The correct comment should be power up domain.

Reviewed-by: Lucas Stach 
Signed-off-by: Dong Aisheng 
Signed-off-by: Shawn Guo