Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 0db943ec authored by Alexander Shiyan's avatar Alexander Shiyan Committed by Arnd Bergmann
Browse files

ARM: clps711x: Add basic DT support 



This patch adds basic support to run Cirrus Logic ARMv4T CPUs
with device-tree support.

Signed-off-by: default avatarAlexander Shiyan <shc_work@mail.ru>
Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
parent 32981ea5

arch/arm/mach-clps711x/Kconfig

+9 −0
Original line number Diff line number Diff line
@@ -2,6 +2,15 @@ if ARCH_CLPS711X 


menu "CLPS711X/EP721X/EP731X Implementations"



config MACH_CLPS711X_DT

	bool "Device-tree support"

	select CLKSRC_OF

	select OF_IRQ

	select USE_OF

	help

	  Select this if you want to experiment device-tree with

	  ARMv4T Cirrus Logic chips.



config ARCH_AUTCPU12

	bool "AUTCPU12"

	help

arch/arm/mach-clps711x/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -6,6 +6,7 @@ 


obj-y				:= common.o devices.o



obj-$(CONFIG_MACH_CLPS711X_DT)	+= board-dt.o

obj-$(CONFIG_ARCH_AUTCPU12)	+= board-autcpu12.o

obj-$(CONFIG_ARCH_CDB89712)	+= board-cdb89712.o

obj-$(CONFIG_ARCH_CLEP7312)	+= board-clep7312.o

arch/arm/mach-clps711x/board-dt.c

0 → 100644
+82 −0
Original line number Diff line number Diff line 
/*

 *  Author: Alexander Shiyan <shc_work@mail.ru>, 2016

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 2 of the License, or

 * (at your option) any later version.

 */



#include <linux/io.h>

#include <linux/of_fdt.h>

#include <linux/platform_device.h>

#include <linux/random.h>

#include <linux/sizes.h>



#include <linux/mfd/syscon/clps711x.h>



#include <asm/system_info.h>

#include <asm/system_misc.h>

#include <asm/mach/arch.h>

#include <asm/mach/map.h>



#define CLPS711X_VIRT_BASE	IOMEM(0xfeff4000)

#define CLPS711X_PHYS_BASE	(0x80000000)

# define SYSFLG1		(0x0140)

# define HALT			(0x0800)

# define UNIQID			(0x2440)

# define RANDID0		(0x2700)

# define RANDID1		(0x2704)

# define RANDID2		(0x2708)

# define RANDID3		(0x270c)



static struct map_desc clps711x_io_desc __initdata = {

	.virtual	= (unsigned long)CLPS711X_VIRT_BASE,

	.pfn		= __phys_to_pfn(CLPS711X_PHYS_BASE),

	.length		= 48 * SZ_1K,

	.type		= MT_DEVICE,

};



static void __init clps711x_map_io(void)

{

	iotable_init(&clps711x_io_desc, 1);

}



static const struct resource clps711x_cpuidle_res =

	DEFINE_RES_MEM(CLPS711X_PHYS_BASE + HALT, SZ_128);



static void __init clps711x_init(void)

{

	u32 id[5];



	id[0] = readl(CLPS711X_VIRT_BASE + UNIQID);

	id[1] = readl(CLPS711X_VIRT_BASE + RANDID0);

	id[2] = readl(CLPS711X_VIRT_BASE + RANDID1);

	id[3] = readl(CLPS711X_VIRT_BASE + RANDID2);

	id[4] = readl(CLPS711X_VIRT_BASE + RANDID3);

	system_rev = SYSFLG1_VERID(readl(CLPS711X_VIRT_BASE + SYSFLG1));



	add_device_randomness(id, sizeof(id));



	system_serial_low = id[0];



	platform_device_register_simple("clps711x-cpuidle", PLATFORM_DEVID_NONE,

					&clps711x_cpuidle_res, 1);

}



static void clps711x_restart(enum reboot_mode mode, const char *cmd)

{

	soft_restart(0);

}



static const char *clps711x_compat[] __initconst = {

	"cirrus,ep7209",

	NULL

};



DT_MACHINE_START(CLPS711X_DT, "Cirrus Logic CLPS711X (Device Tree Support)")

	.dt_compat	= clps711x_compat,

	.map_io		= clps711x_map_io,

	.init_late	= clps711x_init,

	.restart	= clps711x_restart,

MACHINE_END