mirror of
https://github.com/u-boot/u-boot.git
synced 2024-11-26 21:54:37 +08:00
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>
108 lines
2.8 KiB
C
108 lines
2.8 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* TI OMAP timer driver
|
|
*
|
|
* Copyright (C) 2015, Texas Instruments, Incorporated
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <dm.h>
|
|
#include <errno.h>
|
|
#include <timer.h>
|
|
#include <asm/io.h>
|
|
#include <asm/arch/clock.h>
|
|
|
|
/* Timer register bits */
|
|
#define TCLR_START BIT(0) /* Start=1 */
|
|
#define TCLR_AUTO_RELOAD BIT(1) /* Auto reload */
|
|
#define TCLR_PRE_EN BIT(5) /* Pre-scaler enable */
|
|
#define TCLR_PTV_SHIFT (2) /* Pre-scaler shift value */
|
|
|
|
#define TIMER_CLOCK (V_SCLK / (2 << CONFIG_SYS_PTV))
|
|
|
|
struct omap_gptimer_regs {
|
|
unsigned int tidr; /* offset 0x00 */
|
|
unsigned char res1[12];
|
|
unsigned int tiocp_cfg; /* offset 0x10 */
|
|
unsigned char res2[12];
|
|
unsigned int tier; /* offset 0x20 */
|
|
unsigned int tistatr; /* offset 0x24 */
|
|
unsigned int tistat; /* offset 0x28 */
|
|
unsigned int tisr; /* offset 0x2c */
|
|
unsigned int tcicr; /* offset 0x30 */
|
|
unsigned int twer; /* offset 0x34 */
|
|
unsigned int tclr; /* offset 0x38 */
|
|
unsigned int tcrr; /* offset 0x3c */
|
|
unsigned int tldr; /* offset 0x40 */
|
|
unsigned int ttgr; /* offset 0x44 */
|
|
unsigned int twpc; /* offset 0x48 */
|
|
unsigned int tmar; /* offset 0x4c */
|
|
unsigned int tcar1; /* offset 0x50 */
|
|
unsigned int tscir; /* offset 0x54 */
|
|
unsigned int tcar2; /* offset 0x58 */
|
|
};
|
|
|
|
/* Omap Timer Priv */
|
|
struct omap_timer_priv {
|
|
struct omap_gptimer_regs *regs;
|
|
};
|
|
|
|
static int omap_timer_get_count(struct udevice *dev, u64 *count)
|
|
{
|
|
struct omap_timer_priv *priv = dev_get_priv(dev);
|
|
|
|
*count = timer_conv_64(readl(&priv->regs->tcrr));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int omap_timer_probe(struct udevice *dev)
|
|
{
|
|
struct timer_dev_priv *uc_priv = dev_get_uclass_priv(dev);
|
|
struct omap_timer_priv *priv = dev_get_priv(dev);
|
|
|
|
if (!uc_priv->clock_rate)
|
|
uc_priv->clock_rate = TIMER_CLOCK;
|
|
|
|
/* start the counter ticking up, reload value on overflow */
|
|
writel(0, &priv->regs->tldr);
|
|
writel(0, &priv->regs->tcrr);
|
|
/* enable timer */
|
|
writel((CONFIG_SYS_PTV << 2) | TCLR_PRE_EN | TCLR_AUTO_RELOAD |
|
|
TCLR_START, &priv->regs->tclr);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int omap_timer_ofdata_to_platdata(struct udevice *dev)
|
|
{
|
|
struct omap_timer_priv *priv = dev_get_priv(dev);
|
|
|
|
priv->regs = map_physmem(devfdt_get_addr(dev),
|
|
sizeof(struct omap_gptimer_regs), MAP_NOCACHE);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static const struct timer_ops omap_timer_ops = {
|
|
.get_count = omap_timer_get_count,
|
|
};
|
|
|
|
static const struct udevice_id omap_timer_ids[] = {
|
|
{ .compatible = "ti,am335x-timer" },
|
|
{ .compatible = "ti,am4372-timer" },
|
|
{ .compatible = "ti,omap5430-timer" },
|
|
{}
|
|
};
|
|
|
|
U_BOOT_DRIVER(omap_timer) = {
|
|
.name = "omap_timer",
|
|
.id = UCLASS_TIMER,
|
|
.of_match = omap_timer_ids,
|
|
.ofdata_to_platdata = omap_timer_ofdata_to_platdata,
|
|
.priv_auto_alloc_size = sizeof(struct omap_timer_priv),
|
|
.probe = omap_timer_probe,
|
|
.ops = &omap_timer_ops,
|
|
};
|