linux-stable.git/drivers/firmware/imx, branch v5.3

Merge tag 'imx-fixes-5.2' of git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux into fixes

2019-06-16T20:26:55+00:00

i.MX fixes for 5.2:
 - A build fix for soc-imx8 driver which needs SOC_BUS support.  To
   avoid dealing with the dependency for every single i.MX SoC bus
   driver, we selects at from architecture level.
 - A fix on i.MX SCU firmware driver to ensure SCU irq is enabled only
   after IPC is ready.
 - A regression fix on cpuidle-imx6sx driver, which causes some
   characters loss on serial communication.

* tag 'imx-fixes-5.2' of git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux:
  ARM: imx: cpuidle-imx6sx: Restrict the SW2ISO increase to i.MX6SX
  firmware: imx: SCU irq should ONLY be enabled after SCU IPC is ready
  arm64: imx: Fix build error without CONFIG_SOC_BUS

Signed-off-by: Olof Johansson

treewide: Add SPDX license identifier - Makefile/Kconfig

2019-05-21T08:50:46+00:00

Add SPDX license identifiers to all Make/Kconfig files which:

 - Have no license information of any form

These files fall under the project license, GPL v2 only. The resulting SPDX
license identifier is:

  GPL-2.0-only

Signed-off-by: Thomas Gleixner 
Signed-off-by: Greg Kroah-Hartman

firmware: imx: SCU irq should ONLY be enabled after SCU IPC is ready

2019-05-20T01:12:20+00:00

The imx_scu_irq_group_enable() is normally called during module driver
probe phase to enable SCU group irq, if SCU IPC is NOT ready, below
dump will show out:

[    0.933001] Hardware name: Freescale i.MX8QXP MEK (DT)
[    0.938129] pstate: 60000005 (nZCv daif -PAN -UAO)
[    0.942907] pc : imx_scu_call_rpc+0x114/0x158
[    0.947251] lr : imx_scu_irq_group_enable+0x74/0xc4
[    0.952113] sp : ffff00001005bae0
[    0.955415] x29: ffff00001005bae0 x28: ffff0000111bb0a0
[    0.960712] x27: ffff00001140b000 x26: ffff00001111068c
[    0.966011] x25: ffff0000111bb100 x24: 0000000000000000
[    0.971311] x23: ffff0000113d9cd8 x22: 0000000000000001
[    0.976610] x21: 0000000000000001 x20: ffff80083b51a410
[    0.981909] x19: ffff000011259000 x18: 0000000000000480
[    0.987209] x17: 000000000023ffb8 x16: 0000000000000010
[    0.992508] x15: 000000000000023f x14: ffffffffffffffff
[    0.997807] x13: 0000000000000018 x12: 0000000000000030
[    1.003107] x11: 0000000000000003 x10: 0101010101010101
[    1.008406] x9 : ffffffffffffffff x8 : 7f7f7f7f7f7f7f7f
[    1.013706] x7 : fefefeff646c606d x6 : 0000000000000000
[    1.019005] x5 : ffff0000112596c8 x4 : 0000000000000008
[    1.024304] x3 : 0000000000000003 x2 : 0000000000000001
[    1.029604] x1 : ffff00001005bb58 x0 : 0000000000000000
[    1.034905] Call trace:
[    1.037341]  imx_scu_call_rpc+0x114/0x158
[    1.041334]  imx_scu_irq_group_enable+0x74/0xc4
[    1.045856]  imx_sc_wdt_probe+0x24/0x150
[    1.049766]  platform_drv_probe+0x4c/0xb0
[    1.053762]  really_probe+0x1f8/0x2c8
[    1.057407]  driver_probe_device+0x58/0xfc
[    1.061490]  device_driver_attach+0x68/0x70
[    1.065660]  __driver_attach+0x94/0xdc
[    1.069397]  bus_for_each_dev+0x64/0xc0
[    1.073220]  driver_attach+0x20/0x28
[    1.076782]  bus_add_driver+0x148/0x1fc
[    1.080601]  driver_register+0x68/0x120
[    1.084424]  __platform_driver_register+0x4c/0x54
[    1.089120]  imx_sc_wdt_driver_init+0x18/0x20
[    1.093463]  do_one_initcall+0x58/0x1b8
[    1.097287]  kernel_init_freeable+0x1cc/0x288
[    1.101630]  kernel_init+0x10/0x100
[    1.105101]  ret_from_fork+0x10/0x18
[    1.108669] ---[ end trace 9e03302114457de9 ]---
[    1.113296] enable irq failed, group 1, mask 1, ret -22

To avoid such scenario, return -EPROBE_DEFER in imx_scu_irq_group_enable()
API if SCU IPC is NOT ready, then module driver which calls this API
in probe phase will defer probe after SCU IPC ready.

Fixes: 851826c7566e ("firmware: imx: enable imx scu general irq function")
Signed-off-by: Anson Huang 
Signed-off-by: Shawn Guo

firmware: imx: enable imx scu general irq function

2019-04-11T07:31:02+00:00

The System Controller Firmware (SCFW) controls RTC, thermal
and WDOG etc., these resources' interrupt function are managed
by SCU. When any IRQ pending, SCU will notify Linux via MU general
interrupt channel #3, and Linux kernel needs to call SCU APIs
to get IRQ status and notify each module to handle the interrupt.

Since there is no data transmission for SCU IRQ notification, so
doorbell mode is used for this MU channel, and SCU driver will
use notifier mechanism to broadcast to every module which registers
the SCU block notifier.

Signed-off-by: Anson Huang 
Reviewed-by: Dong Aisheng 
Signed-off-by: Shawn Guo

firmware: imx: scu-pd: decouple the SS information from domain names

2019-03-19T13:57:54+00:00

As resource power domain service is provided by SCU firmware, no
SS information required. So we can remove the SS indicator from
the domain names, then the domains defined can be better shared
among different SCU based platforms.

Cc: Ulf Hansson 
Cc: Shawn Guo 
Cc: Sascha Hauer 
Cc: "Rafael J. Wysocki" 
Cc: Kevin Hilman 
Cc: linux-pm@vger.kernel.org
Signed-off-by: Dong Aisheng 
Signed-off-by: Shawn Guo

firmware: imx: scu-pd: add specifying the base of domain name index support

2019-03-19T13:57:50+00:00

As the domain resource id in the same type may not be continuous, so it's
hard to describe all such power domains with current struct imx_sc_pd_range.

Adding the optional base for domain name index to address this issue.
Then we can add the discrete domains easily later.

Cc: Ulf Hansson 
Cc: Shawn Guo 
Cc: Sascha Hauer 
Cc: "Rafael J. Wysocki" 
Cc: Kevin Hilman 
Cc: linux-pm@vger.kernel.org
Signed-off-by: Dong Aisheng 
Signed-off-by: Shawn Guo

firmware: imx: scu-pd: use bool to set postfix

2019-03-19T13:57:45+00:00

Using bool instead 0/1 to indicate whether adding a postfix for domain
names which can improve the code readability and less confusing.

Cc: Ulf Hansson 
Cc: Shawn Guo 
Cc: Sascha Hauer 
Cc: "Rafael J. Wysocki" 
Cc: Kevin Hilman 
Cc: linux-pm@vger.kernel.org
Signed-off-by: Dong Aisheng 
Signed-off-by: Shawn Guo

firmware: imx: Add support to start/stop a CPU

2019-02-11T02:00:47+00:00

This is done via RPC call to SCU.

Signed-off-by: Daniel Baluta 
Reviewed-by: Dong Aisheng 
Signed-off-by: Shawn Guo

firmware: imx: scu-pd: add fallback compatible string support

2019-01-12T01:36:45+00:00

SCU power domain can be used in the same way by IMX8QXP and IMX8QM SoCs.
Make the driver support the fallback compatible string "fsl,scu-pd" to
allow other SoCs to reuse the common part.

Cc: Ulf Hansson 
Cc: Rob Herring 
Cc: Shawn Guo 
Cc: Sascha Hauer 
Cc: Fabio Estevam 
Cc: "Rafael J. Wysocki" 
Cc: Kevin Hilman 
Cc: linux-pm@vger.kernel.org
Signed-off-by: Dong Aisheng 
Reviewed-by: Ulf Hansson 
Signed-off-by: Shawn Guo

firmware: imx: add SCU power domain driver

2018-11-14T01:20:47+00:00

Some i.MX SoCs contain a system controller that is responsible for
controlling the state of the IPs that are present. Communication
between the host processor running an OS and the system controller
happens through a SCU protocol. This patch adds SCU protocol based
power domains drivers.

Cc: Ulf Hansson 
Cc: Rob Herring 
Cc: Shawn Guo 
Cc: Sascha Hauer 
Cc: Fabio Estevam 
Cc: "Rafael J. Wysocki" 
Cc: Kevin Hilman 
Cc: linux-pm@vger.kernel.org
Signed-off-by: Dong Aisheng 
Reviewed-by: Ulf Hansson 
Signed-off-by: Shawn Guo