kernel/arch/arm/mach-imx/gpc.c, branch linux-6.2.y

ARM: imx: Remove unnecessary blank lines

2020-03-11T07:17:02Z

Remove unnecessary blank lines for cleanup. Signed-off-by: Anson Huang Signed-off-by: Shawn Guo

ARM: imx: Add missing of_node_put()

2020-02-18T09:46:08Z

After finishing using device node got from of_find_compatible_node(), of_node_put() needs to be called. Signed-off-by: Anson Huang Signed-off-by: Shawn Guo

ARM: imx: Remove unused include of linux/irqchip/arm-gic.h

2020-02-17T07:37:00Z

linux/irqchip/arm-gic.h is NOT used at all, no need to include it. Signed-off-by: Anson Huang Signed-off-by: Shawn Guo

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 159

2019-05-30T18:26:37Z

Based on 1 normalized pattern(s): the code contained herein is licensed under the gnu general public license you may obtain a copy of the gnu general public license version 2 or later at the following locations http www opensource org licenses gpl license html http www gnu org copyleft gpl html extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 161 file(s). Signed-off-by: Thomas Gleixner Reviewed-by: Richard Fontana Reviewed-by: Allison Randal Reviewed-by: Kate Stewart Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070033.383790741@linutronix.de Signed-off-by: Greg Kroah-Hartman

ARM: imx: add L2 page power control for GPC

2018-06-19T01:06:48Z

Some platforms like i.MX6UL/i.MX6SLL have L2 page power control in GPC, it needs to be disabled if ARM is power gated and L2 is NOT flushed, add GPC interface to control it. Signed-off-by: Anson Huang Reviewed-by: Fabio Estevam Signed-off-by: Shawn Guo

ARM: Convert to using %pOF instead of full_name

2017-08-16T20:25:30Z

Now that we have a custom printf format specifier, convert users of full_name to use %pOF instead. This is preparation to remove storing of the full path string for each node. Signed-off-by: Rob Herring Acked-by: Krzysztof Kozlowski Acked-by: Heiko Stuebner Reviewed-by: Geert Uytterhoeven Acked-by: Gregory CLEMENT Acked-by: Shawn Guo Acked-by: Simon Horman Cc: Russell King Cc: Kukjin Kim Cc: Javier Martinez Canillas Cc: Fabio Estevam Cc: Jason Cooper Cc: Andrew Lunn Cc: Sebastian Hesselbarth Cc: Tony Lindgren Cc: "Benoît Cousson" Cc: Paul Walmsley Cc: Magnus Damm Signed-off-by: Arnd Bergmann

soc: imx: move PGC handling to a new GPC driver

2017-03-08T10:55:47Z

This is an almost complete re-write of the previous GPC power gating control code found in the IMX architecture code. It supports both the old and the new DT binding, allowing more domains to be added later and generally makes the driver easier to extend, while keeping compatibility with existing DTBs. As the result, all functionality regarding the power gating controller gets removed from the IMX architecture GPC driver. It keeps only the IRQ controller code in the architecture, as this is closely coupled to the CPU idle implementation. Signed-off-by: Lucas Stach Signed-off-by: Shawn Guo

Merge branch 'pm-domains'

2016-12-12T19:43:19Z

* pm-domains: PM / Domains: Fix compatible for domain idle state PM / Domains: Do not print PM domain add error message if EPROBE_DEFER PM / Domains: Fix a warning message PM / Domains: check for negative return from of_count_phandle_with_args() PM / doc: Update device documentation for devices in IRQ-safe PM domains PM / Domains: Support IRQ safe PM domains PM / Domains: Abstract genpd locking dt/bindings / PM/Domains: Update binding for PM domain idle states PM / Domains: Save the fwnode in genpd_power_state PM / Domains: Allow domain power states to be read from DT PM / Domains: Add residency property to genpd states PM / Domains: Make genpd state allocation dynamic Conflicts: arch/arm/mach-imx/gpc.c

ARM: imx: gpc: Fix the imx_gpc_genpd_init() error path

2016-10-24T07:13:02Z

If of_genpd_add_provider_onecell() fails the following kernel crash is observed on a kernel built with multi_v7_defconfig: [ 1.739301] [00000040] *pgd=00000000 [ 1.739310] Internal error: Oops: 5 [#1] SMP ARM [ 1.739319] Modules linked in: [ 1.739328] CPU: 1 PID: 95 Comm: kworker/1:4 Not tainted 4.8.0-11897-g6b5e09a #1 [ 1.739331] Hardware name: Freescale i.MX6 Quad/DualLite (Device Tree) [ 1.739352] Workqueue: pm genpd_power_off_work_fn [ 1.739356] task: ee63d400 task.stack: ee70a000 [ 1.739365] PC is at mutex_lock+0xc/0x4c [ 1.739374] LR is at regulator_disable+0x2c/0x60 [ 1.739379] pc : [] lr : [] psr: 60000013 [ 1.739379] sp : ee70beb0 ip : 10624dd3 fp : ee6e6280 [ 1.739382] r10: eefb0900 r9 : 00000000 r8 : c1309918 [ 1.739385] r7 : 00000000 r6 : 00000040 r5 : 00000000 r4 : 00000040 [ 1.739390] r3 : 0000004c r2 : 7fffd540 r1 : 000001e4 r0 : 00000040 Instead of returning of_genpd_add_provider_onecell() directly, we should check its return value and in the case of error we should unwind the previously taken actions, which in these case are: - Call imx6q_pm_pu_power_off() - Set imx6q_pu_domain.reg back to NULL Setting imx6q_pu_domain.reg to NULL in the error case is important as it will prevent further operations in the pu_reg regulator. This kernel crash is not observed with imx_v6_v7_defconfig because it selects GPU and VPU drivers, which are consumers of the GPC block and thus change the refcount of the pu_reg regulator. Signed-off-by: Fabio Estevam Signed-off-by: Shawn Guo

ARM: imx: gpc: Initialize all power domains

2016-10-24T07:12:57Z

Since commit 0159ec670763dd ("PM / Domains: Verify the PM domain is present when adding a provider") the following regression is observed on imx6: imx-gpc: probe of 20dc000.gpc failed with error -22 The gpc probe fails because of_genpd_add_provider_onecell() now checks if all the domains are initialized via pm_genpd_present() function and it fails because not all the power domains are initialized. In order to fix this error, initialize all the power domains from imx_gpc_domains[], not only the imx6q_pu_domain.base one. Reported-by: Olof's autobooter Signed-off-by: Fabio Estevam Signed-off-by: Shawn Guo