mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-05 19:10:13 +00:00
776bf6a545
- Disable bi_boot_params for STM32 MCU and MPU boards - Update stm32-usbphyc node management - Convert CONFIG_STM32_FLASH to Kconfig for STM32 MCU boards - Convert some USB config flags to Kconfig for various boards - Convert CONFIG_BOOTCOMMAND flag to Kconfig for STM32 F429 board - Remove specific CONFIG_STV0991 flags - Remove unused CONFIG_USER_LOWLEVEL_INIT flag - Add ofdata_to_platdata() callback for stm32_spi driver - Update for stm32f7_i2c driver - Remove gpio_hog_probe_all() from STM32 MP1 board - Fix bind command -----BEGIN PGP SIGNATURE----- iQJQBAABCgA6FiEEXyrViUccKBz9c35Jysd4L3sz/6YFAmFlgsIcHHBhdHJpY2Uu Y2hvdGFyZEBmb3NzLnN0LmNvbQAKCRDKx3gvezP/plnND/4q9HSlvddybIPjBHlW rXz1ISwj8JZPp7R4MJcB4RiHofYZzjTXx3dDYUif6oQMpCDp64KPfcUDW0kaq8U7 ZFwJvt59boV1XWlonIXMb3gAkY6gFa5PnYAE/YXEqKvPPvUb7FkT7BWxm4LxCGsj mEmboR8u87s6e4ZP03HJsSVa5FnNwJUZU8b+58Vxp10YC0PPf7kpmgCucDhrghvY TORlk259KUFoZXz4J4My0VzDdxE05gDqq1m6Xw1CzqcUbGysMvjNEHlxGdYbWD/U maamP19DUmKUREmpj3kO/JZvacLJlQP/mdGJ0OWKNbIr/3ha4dYagxDoRodEVo0m DYaaVPGvG24G78d5meB2q9wT0aGdTyaqm+XRBQMvMN2LlaGmu9duA1t6yBuyMcFk BeA7d0eHMo1ezD9FFZMxwIOAWhJlcYQEAMFhUwkR1B322w0NU4nbl9KRCGuGV2Zp ZFQV4BoMvb0NwAdo66xwZ+gSq4Wp1y46VM6x2Mw52v2F4p3teeAqR906TdQVYO8+ hlYChO9+qK4JO7LPX/5wQ4FIzcq1HnTzTpuOSf28hsemiPMu0OkAQv1J7DohNZix wELBA+ZIjGXksmDTPjpXg5CSvVALa/l2G816hp7/XTJ1XRBSz/pzjhp5rwm42zmw x7EPnwzpAlQCSqTQ0sgO+fgoRA== =S4kl -----END PGP SIGNATURE----- Merge tag 'u-boot-stm32-20211012' of https://source.denx.de/u-boot/custodians/u-boot-stm - Disable ATAGS for STM32 MCU and MPU boards - Disable bi_boot_params for STM32 MCU and MPU boards - Update stm32-usbphyc node management - Convert CONFIG_STM32_FLASH to Kconfig for STM32 MCU boards - Convert some USB config flags to Kconfig for various boards - Convert CONFIG_BOOTCOMMAND flag to Kconfig for STM32 F429 board - Remove specific CONFIG_STV0991 flags - Remove unused CONFIG_USER_LOWLEVEL_INIT flag - Add ofdata_to_platdata() callback for stm32_spi driver - Update for stm32f7_i2c driver - Remove gpio_hog_probe_all() from STM32 MP1 board - Fix bind command Signed-off-by: Tom Rini <trini@konsulko.com>
181 lines
3.9 KiB
C
181 lines
3.9 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Copyright (C) 2015 Thomas Chou <thomas@wytron.com.tw>
|
|
*/
|
|
|
|
#define LOG_CATEGORY UCLASS_TIMER
|
|
|
|
#include <common.h>
|
|
#include <clk.h>
|
|
#include <cpu.h>
|
|
#include <dm.h>
|
|
#include <asm/global_data.h>
|
|
#include <dm/lists.h>
|
|
#include <dm/device_compat.h>
|
|
#include <dm/device-internal.h>
|
|
#include <dm/root.h>
|
|
#include <errno.h>
|
|
#include <init.h>
|
|
#include <timer.h>
|
|
#include <linux/err.h>
|
|
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
|
|
/*
|
|
* Implement a timer uclass to work with lib/time.c. The timer is usually
|
|
* a 32/64 bits free-running up counter. The get_rate() method is used to get
|
|
* the input clock frequency of the timer. The get_count() method is used
|
|
* to get the current 64 bits count value. If the hardware is counting down,
|
|
* the value should be inversed inside the method. There may be no real
|
|
* tick, and no timer interrupt.
|
|
*/
|
|
|
|
int notrace timer_get_count(struct udevice *dev, u64 *count)
|
|
{
|
|
const struct timer_ops *ops = device_get_ops(dev);
|
|
|
|
if (!ops->get_count)
|
|
return -ENOSYS;
|
|
|
|
*count = ops->get_count(dev);
|
|
return 0;
|
|
}
|
|
|
|
unsigned long notrace timer_get_rate(struct udevice *dev)
|
|
{
|
|
struct timer_dev_priv *uc_priv = dev_get_uclass_priv(dev);
|
|
|
|
return uc_priv->clock_rate;
|
|
}
|
|
|
|
static int timer_pre_probe(struct udevice *dev)
|
|
{
|
|
if (CONFIG_IS_ENABLED(OF_REAL)) {
|
|
struct timer_dev_priv *uc_priv = dev_get_uclass_priv(dev);
|
|
struct clk timer_clk;
|
|
int err;
|
|
ulong ret;
|
|
|
|
/*
|
|
* It is possible that a timer device has a null ofnode
|
|
*/
|
|
if (!dev_has_ofnode(dev))
|
|
return 0;
|
|
|
|
err = clk_get_by_index(dev, 0, &timer_clk);
|
|
if (!err) {
|
|
ret = clk_get_rate(&timer_clk);
|
|
if (IS_ERR_VALUE(ret))
|
|
return ret;
|
|
uc_priv->clock_rate = ret;
|
|
} else {
|
|
uc_priv->clock_rate =
|
|
dev_read_u32_default(dev, "clock-frequency", 0);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int timer_post_probe(struct udevice *dev)
|
|
{
|
|
struct timer_dev_priv *uc_priv = dev_get_uclass_priv(dev);
|
|
|
|
if (!uc_priv->clock_rate)
|
|
return -EINVAL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
#if CONFIG_IS_ENABLED(CPU)
|
|
int timer_timebase_fallback(struct udevice *dev)
|
|
{
|
|
struct udevice *cpu;
|
|
struct cpu_plat *cpu_plat;
|
|
struct timer_dev_priv *uc_priv = dev_get_uclass_priv(dev);
|
|
|
|
/* Did we get our clock rate from the device tree? */
|
|
if (uc_priv->clock_rate)
|
|
return 0;
|
|
|
|
/* Fall back to timebase-frequency */
|
|
dev_dbg(dev, "missing clocks or clock-frequency property; falling back on timebase-frequency\n");
|
|
cpu = cpu_get_current_dev();
|
|
if (!cpu)
|
|
return -ENODEV;
|
|
|
|
cpu_plat = dev_get_parent_plat(cpu);
|
|
if (!cpu_plat)
|
|
return -ENODEV;
|
|
|
|
uc_priv->clock_rate = cpu_plat->timebase_freq;
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
u64 timer_conv_64(u32 count)
|
|
{
|
|
/* increment tbh if tbl has rolled over */
|
|
if (count < gd->timebase_l)
|
|
gd->timebase_h++;
|
|
gd->timebase_l = count;
|
|
return ((u64)gd->timebase_h << 32) | gd->timebase_l;
|
|
}
|
|
|
|
int notrace dm_timer_init(void)
|
|
{
|
|
struct udevice *dev = NULL;
|
|
__maybe_unused ofnode node;
|
|
int ret;
|
|
|
|
if (gd->timer)
|
|
return 0;
|
|
|
|
/*
|
|
* Directly access gd->dm_root to suppress error messages, if the
|
|
* virtual root driver does not yet exist.
|
|
*/
|
|
if (gd->dm_root == NULL)
|
|
return -EAGAIN;
|
|
|
|
if (CONFIG_IS_ENABLED(OF_REAL)) {
|
|
/* Check for a chosen timer to be used for tick */
|
|
node = ofnode_get_chosen_node("tick-timer");
|
|
|
|
if (ofnode_valid(node) &&
|
|
uclass_get_device_by_ofnode(UCLASS_TIMER, node, &dev)) {
|
|
/*
|
|
* If the timer is not marked to be bound before
|
|
* relocation, bind it anyway.
|
|
*/
|
|
if (!lists_bind_fdt(dm_root(), node, &dev, NULL, false)) {
|
|
ret = device_probe(dev);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!dev) {
|
|
/* Fall back to the first available timer */
|
|
ret = uclass_first_device_err(UCLASS_TIMER, &dev);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
if (dev) {
|
|
gd->timer = dev;
|
|
return 0;
|
|
}
|
|
|
|
return -ENODEV;
|
|
}
|
|
|
|
UCLASS_DRIVER(timer) = {
|
|
.id = UCLASS_TIMER,
|
|
.name = "timer",
|
|
.pre_probe = timer_pre_probe,
|
|
.flags = DM_UC_FLAG_SEQ_ALIAS,
|
|
.post_probe = timer_post_probe,
|
|
.per_device_auto = sizeof(struct timer_dev_priv),
|
|
};
|