mirror of
https://github.com/AsahiLinux/u-boot
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caa4daa2ae
We use 'priv' for private data but often use 'platdata' for platform data. We can't really use 'pdata' since that is ambiguous (it could mean private or platform data). Rename some of the latter variables to end with 'plat' for consistency. Signed-off-by: Simon Glass <sjg@chromium.org>
123 lines
2.5 KiB
C
123 lines
2.5 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2020 Microchip Technology Inc. and its subsidiaries
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*
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* Author: Claudiu Beznea <claudiu.beznea@microchip.com>
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*/
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#include <common.h>
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#include <cpu.h>
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#include <dm.h>
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#include <div64.h>
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#include <linux/clk-provider.h>
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struct at91_cpu_platdata {
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const char *name;
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ulong cpufreq_mhz;
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ulong mckfreq_mhz;
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ulong xtalfreq_mhz;
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};
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extern char *get_cpu_name(void);
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const char *at91_cpu_get_name(void)
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{
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return get_cpu_name();
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}
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int at91_cpu_get_desc(const struct udevice *dev, char *buf, int size)
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{
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struct at91_cpu_platdata *plat = dev_get_platdata(dev);
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snprintf(buf, size, "%s\n"
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"Crystal frequency: %8lu MHz\n"
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"CPU clock : %8lu MHz\n"
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"Master clock : %8lu MHz\n",
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plat->name, plat->xtalfreq_mhz, plat->cpufreq_mhz,
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plat->mckfreq_mhz);
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return 0;
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}
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static int at91_cpu_get_info(const struct udevice *dev, struct cpu_info *info)
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{
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struct at91_cpu_platdata *plat = dev_get_platdata(dev);
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info->cpu_freq = plat->cpufreq_mhz * 1000000;
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info->features = BIT(CPU_FEAT_L1_CACHE);
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return 0;
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}
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static int at91_cpu_get_count(const struct udevice *dev)
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{
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return 1;
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}
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static int at91_cpu_get_vendor(const struct udevice *dev, char *buf, int size)
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{
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snprintf(buf, size, "Microchip Technology Inc.");
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return 0;
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}
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static const struct cpu_ops at91_cpu_ops = {
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.get_desc = at91_cpu_get_desc,
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.get_info = at91_cpu_get_info,
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.get_count = at91_cpu_get_count,
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.get_vendor = at91_cpu_get_vendor,
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};
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static const struct udevice_id at91_cpu_ids[] = {
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{ .compatible = "arm,cortex-a7" },
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{ /* Sentinel. */ }
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};
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static int at91_cpu_probe(struct udevice *dev)
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{
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struct at91_cpu_platdata *plat = dev_get_platdata(dev);
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struct clk clk;
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ulong rate;
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int ret;
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ret = clk_get_by_index(dev, 0, &clk);
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if (ret)
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return ret;
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rate = clk_get_rate(&clk);
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if (!rate)
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return -ENOTSUPP;
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plat->cpufreq_mhz = DIV_ROUND_CLOSEST_ULL(rate, 1000000);
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ret = clk_get_by_index(dev, 1, &clk);
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if (ret)
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return ret;
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rate = clk_get_rate(&clk);
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if (!rate)
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return -ENOTSUPP;
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plat->mckfreq_mhz = DIV_ROUND_CLOSEST_ULL(rate, 1000000);
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ret = clk_get_by_index(dev, 2, &clk);
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if (ret)
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return ret;
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rate = clk_get_rate(&clk);
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if (!rate)
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return -ENOTSUPP;
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plat->xtalfreq_mhz = DIV_ROUND_CLOSEST_ULL(rate, 1000000);
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plat->name = get_cpu_name();
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return 0;
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}
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U_BOOT_DRIVER(cpu_at91_drv) = {
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.name = "at91-cpu",
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.id = UCLASS_CPU,
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.of_match = at91_cpu_ids,
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.ops = &at91_cpu_ops,
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.probe = at91_cpu_probe,
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.plat_auto = sizeof(struct at91_cpu_platdata),
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.flags = DM_FLAG_PRE_RELOC,
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};
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