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/*
* Copyright (C) 2016 Atmel Corporation
* Wenyou.Yang <wenyou.yang@atmel.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <clk-uclass.h>
#include <dm/device.h>
#include <linux/io.h>
#include <mach/at91_pmc.h>
#include "pmc.h"
DECLARE_GLOBAL_DATA_PTR;
#define UTMI_FIXED_MUL 40
static int utmi_clk_enable(struct clk *clk)
{
struct pmc_platdata *plat = dev_get_platdata(clk->dev);
struct at91_pmc *pmc = plat->reg_base;
u32 tmp;
if (readl(&pmc->sr) & AT91_PMC_LOCKU)
return 0;
tmp = readl(&pmc->uckr);
tmp |= AT91_PMC_UPLLEN |
AT91_PMC_UPLLCOUNT |
AT91_PMC_BIASEN;
writel(tmp, &pmc->uckr);
while (!(readl(&pmc->sr) & AT91_PMC_LOCKU))
;
return 0;
}
static ulong utmi_clk_get_rate(struct clk *clk)
{
return gd->arch.main_clk_rate_hz * UTMI_FIXED_MUL;
}
static struct clk_ops utmi_clk_ops = {
.enable = utmi_clk_enable,
.get_rate = utmi_clk_get_rate,
};
static int utmi_clk_probe(struct udevice *dev)
{
return at91_pmc_core_probe(dev);
}
static const struct udevice_id utmi_clk_match[] = {
{ .compatible = "atmel,at91sam9x5-clk-utmi" },
{}
};
U_BOOT_DRIVER(at91sam9x5_utmi_clk) = {
.name = "at91sam9x5-utmi-clk",
.id = UCLASS_CLK,
.of_match = utmi_clk_match,
.probe = utmi_clk_probe,
.platdata_auto_alloc_size = sizeof(struct pmc_platdata),
.ops = &utmi_clk_ops,
};
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