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- // 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,
- };
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