mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
synced 2024-12-29 17:22:07 +00:00
bd4ce2d7f9
To make the code more standalone and moveable, let's convert it into a platform driver. Cc: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
134 lines
3.5 KiB
C
134 lines
3.5 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* Copyright (C) 2008-2009 ST-Ericsson SA
|
|
*
|
|
* Author: Srinidhi KASAGAR <srinidhi.kasagar@stericsson.com>
|
|
*/
|
|
#include <linux/types.h>
|
|
#include <linux/init.h>
|
|
#include <linux/device.h>
|
|
#include <linux/amba/bus.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/irq.h>
|
|
#include <linux/irqchip.h>
|
|
#include <linux/irqchip/arm-gic.h>
|
|
#include <linux/mfd/dbx500-prcmu.h>
|
|
#include <linux/platform_data/arm-ux500-pm.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/io.h>
|
|
#include <linux/of.h>
|
|
#include <linux/of_address.h>
|
|
#include <linux/of_platform.h>
|
|
#include <linux/regulator/machine.h>
|
|
|
|
#include <asm/outercache.h>
|
|
#include <asm/hardware/cache-l2x0.h>
|
|
#include <asm/mach/map.h>
|
|
#include <asm/mach/arch.h>
|
|
|
|
static int __init ux500_l2x0_unlock(void)
|
|
{
|
|
int i;
|
|
struct device_node *np;
|
|
void __iomem *l2x0_base;
|
|
|
|
np = of_find_compatible_node(NULL, NULL, "arm,pl310-cache");
|
|
l2x0_base = of_iomap(np, 0);
|
|
of_node_put(np);
|
|
if (!l2x0_base)
|
|
return -ENODEV;
|
|
|
|
/*
|
|
* Unlock Data and Instruction Lock if locked. Ux500 U-Boot versions
|
|
* apparently locks both caches before jumping to the kernel. The
|
|
* l2x0 core will not touch the unlock registers if the l2x0 is
|
|
* already enabled, so we do it right here instead. The PL310 has
|
|
* 8 sets of registers, one per possible CPU.
|
|
*/
|
|
for (i = 0; i < 8; i++) {
|
|
writel_relaxed(0x0, l2x0_base + L2X0_LOCKDOWN_WAY_D_BASE +
|
|
i * L2X0_LOCKDOWN_STRIDE);
|
|
writel_relaxed(0x0, l2x0_base + L2X0_LOCKDOWN_WAY_I_BASE +
|
|
i * L2X0_LOCKDOWN_STRIDE);
|
|
}
|
|
iounmap(l2x0_base);
|
|
return 0;
|
|
}
|
|
|
|
static void ux500_l2c310_write_sec(unsigned long val, unsigned reg)
|
|
{
|
|
/*
|
|
* We can't write to secure registers as we are in non-secure
|
|
* mode, until we have some SMI service available.
|
|
*/
|
|
}
|
|
|
|
/*
|
|
* FIXME: Should we set up the GPIO domain here?
|
|
*
|
|
* The problem is that we cannot put the interrupt resources into the platform
|
|
* device until the irqdomain has been added. Right now, we set the GIC interrupt
|
|
* domain from init_irq(), then load the gpio driver from
|
|
* core_initcall(nmk_gpio_init) and add the platform devices from
|
|
* arch_initcall(customize_machine).
|
|
*
|
|
* This feels fragile because it depends on the gpio device getting probed
|
|
* _before_ any device uses the gpio interrupts.
|
|
*/
|
|
static void __init ux500_init_irq(void)
|
|
{
|
|
struct device_node *np;
|
|
struct resource r;
|
|
|
|
irqchip_init();
|
|
prcmu_early_init();
|
|
np = of_find_compatible_node(NULL, NULL, "stericsson,db8500-prcmu");
|
|
of_address_to_resource(np, 0, &r);
|
|
of_node_put(np);
|
|
if (!r.start) {
|
|
pr_err("could not find PRCMU base resource\n");
|
|
return;
|
|
}
|
|
ux500_pm_init(r.start, r.end-r.start);
|
|
|
|
/* Unlock before init */
|
|
ux500_l2x0_unlock();
|
|
outer_cache.write_sec = ux500_l2c310_write_sec;
|
|
}
|
|
|
|
static void ux500_restart(enum reboot_mode mode, const char *cmd)
|
|
{
|
|
local_irq_disable();
|
|
local_fiq_disable();
|
|
|
|
prcmu_system_reset(0);
|
|
}
|
|
|
|
static const struct of_device_id u8500_local_bus_nodes[] = {
|
|
/* only create devices below soc node */
|
|
{ .compatible = "stericsson,db8500", },
|
|
{ .compatible = "simple-bus"},
|
|
{ },
|
|
};
|
|
|
|
static void __init u8500_init_machine(void)
|
|
{
|
|
of_platform_populate(NULL, u8500_local_bus_nodes,
|
|
NULL, NULL);
|
|
}
|
|
|
|
static const char * stericsson_dt_platform_compat[] = {
|
|
"st-ericsson,u8500",
|
|
"st-ericsson,u9500",
|
|
NULL,
|
|
};
|
|
|
|
DT_MACHINE_START(U8500_DT, "ST-Ericsson Ux5x0 platform (Device Tree Support)")
|
|
.l2c_aux_val = 0,
|
|
.l2c_aux_mask = ~0,
|
|
.init_irq = ux500_init_irq,
|
|
.init_machine = u8500_init_machine,
|
|
.dt_compat = stericsson_dt_platform_compat,
|
|
.restart = ux500_restart,
|
|
MACHINE_END
|