mips: ralink: introduce commonly used remap node function

The ralink_of_remap() function is repeated several times on SoC specific
source files. They have the same structure, but just differ in compatible
strings. In order to make commonly use of these codes, this patch
introduces a newly designed mtmips_of_remap_node() function to match and
remap all supported system controller and memory controller nodes.

Build and run tested on MT7620 and MT7628.

Signed-off-by: Shiji Yang <yangshiji66@outlook.com>
Reviewed-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>

mips: ralink: remove reset related code

A proper clock driver for ralink SoCs has been added. This driver is also
a reset provider for the SoC. Hence there is no need to have reset related
code in 'arch/mips/ralink' folder anymore. The only code that remains is
the one related with mips_reboot_setup where a PCI reset is performed.
We maintain this because I cannot test old ralink board with PCI to be
sure all works if we remove also this code.

Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>

mips: ralink: mt7620: remove clock related code

A proper clock driver for ralink SoCs has been added. Hence there is no
need to have clock related code in 'arch/mips/ralink' folder anymore.
Since this is the last clock related code removal, remove also remaining
prototypes in 'common.h' header file.

Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>

MIPS: ralink: mt7621: add memory detection support

mt7621 has the following memory map:
0x0-0x1c000000: lower 448m memory
0x1c000000-0x2000000: peripheral registers
0x20000000-0x2400000: higher 64m memory

detect_memory_region in arch/mips/kernel/setup.c only adds the first
memory region and isn't suitable for 512m memory detection because
it may accidentally read the memory area for peripheral registers.

This commit adds memory detection capability for mt7621:
1. Add the highmem area when 512m is detected.
2. Guard memcmp from accessing peripheral registers:
This only happens when a user decided to change kernel load address
to 256m or higher address. Since this is a quite unusual case, we
just skip 512m testing and return 256m as memory size.

Signed-off-by: Chuanhong Guo <gch981213@gmail.com>
[Minor commit message reword, make mt7621_memory_detect static]
Signed-off-by: Ilya Lipnitskiy <ilya.lipnitskiy@gmail.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>

MIPS: ralink: annotate prom_soc_init() with __init

prom_soc_init is only called from prom_init in arch/mips/ralink/prom.c,
which is already annotated with __init, so annotate prom_soc_init with
__init too.

Signed-off-by: Ilya Lipnitskiy <ilya.lipnitskiy@gmail.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500

Based on 2 normalized pattern(s):

this program is free software you can redistribute it and or modify
it under the terms of the gnu general public license version 2 as
published by the free software foundation

this program is free software you can redistribute it and or modify
it under the terms of the gnu general public license version 2 as
published by the free software foundation #

extracted by the scancode license scanner the SPDX license identifier

GPL-2.0-only

has been chosen to replace the boilerplate/reference in 4122 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Enrico Weigelt <info@metux.net>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Allison Randal <allison@lohutok.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

MIPS: Change my email address

The old address is no longer valid. Use the my new one instead.

Signed-off-by: John Crispin <john@phrozen.org>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/13201/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

MIPS: ralink: cleanup the soc specific pinmux data

Before we had a pinctrl driver we used a custom OF api. This patch converts the
soc specific pinmux data to a new set of structs. We also add some new pinmux
setings.

Signed-off-by: John Crispin <blogic@openwrt.org>
Patchwork: http://patchwork.linux-mips.org/patch/8009/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

MIPS: ralink: Add support for reset-controller API

Add a helper for reseting different devices on the SoC.

Signed-off-by: John Crispin <blogic@openwrt.org>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/5804/
Patchwork: https://patchwork.linux-mips.org/patch/5797/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

MIPS: ralink: add memory definition to struct ralink_soc_info

Depending on the actual SoC we have a different base address as well as minimum
and maximum size for RAM. Add these fields to the per SoC structure.

Signed-off-by: John Crispin <blogic@openwrt.org>
Patchwork: http://patchwork.linux-mips.org/patch/5179/

MIPS: ralink: add uart mask to struct ralink_pinmux

Add a field for the uart muxing mask and set it inside the rt305x setup code.

Signed-off-by: John Crispin <blogic@openwrt.org>
Patchwork: http://patchwork.linux-mips.org/patch/5744/

MIPS: ralink: add pci group to struct ralink_pinmux

This will be used for RT3662/RT3883.

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
Acked-by: John Crispin <blogic@openwrt.org>
Patchwork: http://patchwork.linux-mips.org/patch/5173/

MIPS: ralink: rename gpio_pinmux to rt_gpio_pinmux

Add proper namespacing to the variable.

Signed-off-by: John Crispin <blogic@openwrt.org>
Patchwork: http://patchwork.linux-mips.org/patch/5171/

MIPS: ralink: adds include files

Before we start adding the platform code we add the common include files.

Signed-off-by: John Crispin <blogic@openwrt.org>
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
Patchwork: http://patchwork.linux-mips.org/patch/4893/