mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-18 18:59:44 +00:00
460a97f3a2
The dw-apb timer does not use 'gd', so remove its declaration. Signed-off-by: Simon Goldschmidt <simon.k.r.goldschmidt@gmail.com>
87 lines
1.8 KiB
C
87 lines
1.8 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Designware APB Timer driver
|
|
*
|
|
* Copyright (C) 2018 Marek Vasut <marex@denx.de>
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <dm.h>
|
|
#include <clk.h>
|
|
#include <timer.h>
|
|
|
|
#include <asm/io.h>
|
|
#include <asm/arch/timer.h>
|
|
|
|
#define DW_APB_LOAD_VAL 0x0
|
|
#define DW_APB_CURR_VAL 0x4
|
|
#define DW_APB_CTRL 0x8
|
|
|
|
struct dw_apb_timer_priv {
|
|
fdt_addr_t regs;
|
|
};
|
|
|
|
static int dw_apb_timer_get_count(struct udevice *dev, u64 *count)
|
|
{
|
|
struct dw_apb_timer_priv *priv = dev_get_priv(dev);
|
|
|
|
/*
|
|
* The DW APB counter counts down, but this function
|
|
* requires the count to be incrementing. Invert the
|
|
* result.
|
|
*/
|
|
*count = timer_conv_64(~readl(priv->regs + DW_APB_CURR_VAL));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dw_apb_timer_probe(struct udevice *dev)
|
|
{
|
|
struct timer_dev_priv *uc_priv = dev_get_uclass_priv(dev);
|
|
struct dw_apb_timer_priv *priv = dev_get_priv(dev);
|
|
struct clk clk;
|
|
int ret;
|
|
|
|
ret = clk_get_by_index(dev, 0, &clk);
|
|
if (ret)
|
|
return ret;
|
|
|
|
uc_priv->clock_rate = clk_get_rate(&clk);
|
|
|
|
clk_free(&clk);
|
|
|
|
/* init timer */
|
|
writel(0xffffffff, priv->regs + DW_APB_LOAD_VAL);
|
|
writel(0xffffffff, priv->regs + DW_APB_CURR_VAL);
|
|
setbits_le32(priv->regs + DW_APB_CTRL, 0x3);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dw_apb_timer_ofdata_to_platdata(struct udevice *dev)
|
|
{
|
|
struct dw_apb_timer_priv *priv = dev_get_priv(dev);
|
|
|
|
priv->regs = dev_read_addr(dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct timer_ops dw_apb_timer_ops = {
|
|
.get_count = dw_apb_timer_get_count,
|
|
};
|
|
|
|
static const struct udevice_id dw_apb_timer_ids[] = {
|
|
{ .compatible = "snps,dw-apb-timer" },
|
|
{}
|
|
};
|
|
|
|
U_BOOT_DRIVER(dw_apb_timer) = {
|
|
.name = "dw_apb_timer",
|
|
.id = UCLASS_TIMER,
|
|
.ops = &dw_apb_timer_ops,
|
|
.probe = dw_apb_timer_probe,
|
|
.of_match = dw_apb_timer_ids,
|
|
.ofdata_to_platdata = dw_apb_timer_ofdata_to_platdata,
|
|
.priv_auto_alloc_size = sizeof(struct dw_apb_timer_priv),
|
|
};
|