124 lines
2.5 KiB
C
124 lines
2.5 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Copyright (C) 2020 Microchip Technology Inc. and its subsidiaries
|
|
*
|
|
* Author: Claudiu Beznea <claudiu.beznea@microchip.com>
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <cpu.h>
|
|
#include <dm.h>
|
|
#include <div64.h>
|
|
#include <linux/clk-provider.h>
|
|
|
|
struct at91_cpu_platdata {
|
|
const char *name;
|
|
ulong cpufreq_mhz;
|
|
ulong mckfreq_mhz;
|
|
ulong xtalfreq_mhz;
|
|
};
|
|
|
|
extern char *get_cpu_name(void);
|
|
|
|
const char *at91_cpu_get_name(void)
|
|
{
|
|
return get_cpu_name();
|
|
}
|
|
|
|
int at91_cpu_get_desc(const struct udevice *dev, char *buf, int size)
|
|
{
|
|
struct at91_cpu_platdata *plat = dev_get_platdata(dev);
|
|
|
|
snprintf(buf, size, "%s\n"
|
|
"Crystal frequency: %8lu MHz\n"
|
|
"CPU clock : %8lu MHz\n"
|
|
"Master clock : %8lu MHz\n",
|
|
plat->name, plat->xtalfreq_mhz, plat->cpufreq_mhz,
|
|
plat->mckfreq_mhz);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int at91_cpu_get_info(const struct udevice *dev, struct cpu_info *info)
|
|
{
|
|
struct at91_cpu_platdata *plat = dev_get_platdata(dev);
|
|
|
|
info->cpu_freq = plat->cpufreq_mhz * 1000000;
|
|
info->features = BIT(CPU_FEAT_L1_CACHE);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int at91_cpu_get_count(const struct udevice *dev)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
static int at91_cpu_get_vendor(const struct udevice *dev, char *buf, int size)
|
|
{
|
|
snprintf(buf, size, "Microchip Technology Inc.");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct cpu_ops at91_cpu_ops = {
|
|
.get_desc = at91_cpu_get_desc,
|
|
.get_info = at91_cpu_get_info,
|
|
.get_count = at91_cpu_get_count,
|
|
.get_vendor = at91_cpu_get_vendor,
|
|
};
|
|
|
|
static const struct udevice_id at91_cpu_ids[] = {
|
|
{ .compatible = "arm,cortex-a7" },
|
|
{ /* Sentinel. */ }
|
|
};
|
|
|
|
static int at91_cpu_probe(struct udevice *dev)
|
|
{
|
|
struct at91_cpu_platdata *plat = dev_get_platdata(dev);
|
|
struct clk clk;
|
|
ulong rate;
|
|
int ret;
|
|
|
|
ret = clk_get_by_index(dev, 0, &clk);
|
|
if (ret)
|
|
return ret;
|
|
|
|
rate = clk_get_rate(&clk);
|
|
if (!rate)
|
|
return -ENOTSUPP;
|
|
plat->cpufreq_mhz = DIV_ROUND_CLOSEST_ULL(rate, 1000000);
|
|
|
|
ret = clk_get_by_index(dev, 1, &clk);
|
|
if (ret)
|
|
return ret;
|
|
|
|
rate = clk_get_rate(&clk);
|
|
if (!rate)
|
|
return -ENOTSUPP;
|
|
plat->mckfreq_mhz = DIV_ROUND_CLOSEST_ULL(rate, 1000000);
|
|
|
|
ret = clk_get_by_index(dev, 2, &clk);
|
|
if (ret)
|
|
return ret;
|
|
|
|
rate = clk_get_rate(&clk);
|
|
if (!rate)
|
|
return -ENOTSUPP;
|
|
plat->xtalfreq_mhz = DIV_ROUND_CLOSEST_ULL(rate, 1000000);
|
|
|
|
plat->name = get_cpu_name();
|
|
|
|
return 0;
|
|
}
|
|
|
|
U_BOOT_DRIVER(cpu_at91_drv) = {
|
|
.name = "at91-cpu",
|
|
.id = UCLASS_CPU,
|
|
.of_match = at91_cpu_ids,
|
|
.ops = &at91_cpu_ops,
|
|
.probe = at91_cpu_probe,
|
|
.platdata_auto_alloc_size = sizeof(struct at91_cpu_platdata),
|
|
.flags = DM_FLAG_PRE_RELOC,
|
|
};
|