mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-16 09:48:16 +00:00
d7a184d4a7
When a driver declares DM_FLAG_PRE_RELOC flag, it wishes to be bound before relocation. However due to a bug in the DM core, the flag only takes effect when devices are statically declared via U_BOOT_DEVICE(). This bug has been fixed recently by commit "dm: core: Respect drivers with the DM_FLAG_PRE_RELOC flag in lists_bind_fdt()", but with the fix, it has a side effect that all existing drivers that declared DM_FLAG_PRE_RELOC flag will be bound before relocation now. This may expose potential boot failure on some boards due to insufficient memory during the pre-relocation stage. To mitigate this potential impact, the following changes are implemented: - Remove DM_FLAG_PRE_RELOC flag in the driver, if the driver only supports configuration from device tree (OF_CONTROL) - Keep DM_FLAG_PRE_RELOC flag in the driver only if the device is statically declared via U_BOOT_DEVICE() - Surround DM_FLAG_PRE_RELOC flag with OF_CONTROL check, for drivers that support both statically declared devices and configuration from device tree Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Simon Glass <sjg@chromium.org>
93 lines
2.1 KiB
C
93 lines
2.1 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Copyright 2016 Google Inc.
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <dm.h>
|
|
#include <errno.h>
|
|
#include <timer.h>
|
|
#include <asm/io.h>
|
|
#include <asm/arch/timer.h>
|
|
|
|
#define AST_TICK_TIMER 1
|
|
#define AST_TMC_RELOAD_VAL 0xffffffff
|
|
|
|
struct ast_timer_priv {
|
|
struct ast_timer *regs;
|
|
struct ast_timer_counter *tmc;
|
|
};
|
|
|
|
static struct ast_timer_counter *ast_get_timer_counter(struct ast_timer *timer,
|
|
int n)
|
|
{
|
|
if (n > 3)
|
|
return &timer->timers2[n - 4];
|
|
else
|
|
return &timer->timers1[n - 1];
|
|
}
|
|
|
|
static int ast_timer_probe(struct udevice *dev)
|
|
{
|
|
struct ast_timer_priv *priv = dev_get_priv(dev);
|
|
struct timer_dev_priv *uc_priv = dev_get_uclass_priv(dev);
|
|
|
|
writel(AST_TMC_RELOAD_VAL, &priv->tmc->reload_val);
|
|
|
|
/*
|
|
* Stop the timer. This will also load reload_val into
|
|
* the status register.
|
|
*/
|
|
clrbits_le32(&priv->regs->ctrl1,
|
|
AST_TMC_EN << AST_TMC_CTRL1_SHIFT(AST_TICK_TIMER));
|
|
/* Start the timer from the fixed 1MHz clock. */
|
|
setbits_le32(&priv->regs->ctrl1,
|
|
(AST_TMC_EN | AST_TMC_1MHZ) <<
|
|
AST_TMC_CTRL1_SHIFT(AST_TICK_TIMER));
|
|
|
|
uc_priv->clock_rate = AST_TMC_RATE;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ast_timer_get_count(struct udevice *dev, u64 *count)
|
|
{
|
|
struct ast_timer_priv *priv = dev_get_priv(dev);
|
|
|
|
*count = AST_TMC_RELOAD_VAL - readl(&priv->tmc->status);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ast_timer_ofdata_to_platdata(struct udevice *dev)
|
|
{
|
|
struct ast_timer_priv *priv = dev_get_priv(dev);
|
|
|
|
priv->regs = devfdt_get_addr_ptr(dev);
|
|
if (IS_ERR(priv->regs))
|
|
return PTR_ERR(priv->regs);
|
|
|
|
priv->tmc = ast_get_timer_counter(priv->regs, AST_TICK_TIMER);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct timer_ops ast_timer_ops = {
|
|
.get_count = ast_timer_get_count,
|
|
};
|
|
|
|
static const struct udevice_id ast_timer_ids[] = {
|
|
{ .compatible = "aspeed,ast2500-timer" },
|
|
{ .compatible = "aspeed,ast2400-timer" },
|
|
{ }
|
|
};
|
|
|
|
U_BOOT_DRIVER(ast_timer) = {
|
|
.name = "ast_timer",
|
|
.id = UCLASS_TIMER,
|
|
.of_match = ast_timer_ids,
|
|
.probe = ast_timer_probe,
|
|
.priv_auto_alloc_size = sizeof(struct ast_timer_priv),
|
|
.ofdata_to_platdata = ast_timer_ofdata_to_platdata,
|
|
.ops = &ast_timer_ops,
|
|
};
|