mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-11 15:37:23 +00:00
649aa6cfe8
dm_warn is too noisy, replace with dev_dbg for less noise. Based on original work by Wenyou Yang Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
55 lines
1.2 KiB
C
55 lines
1.2 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Copyright (C) 2016 Atmel Corporation
|
|
* Wenyou.Yang <wenyou.yang@atmel.com>
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <clk-uclass.h>
|
|
#include <dm.h>
|
|
#include <dm/util.h>
|
|
#include <linux/io.h>
|
|
#include <mach/at91_pmc.h>
|
|
#include "pmc.h"
|
|
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
|
|
#define H32MX_MAX_FREQ 90000000
|
|
|
|
static ulong sama5d4_h32mx_clk_get_rate(struct clk *clk)
|
|
{
|
|
struct pmc_platdata *plat = dev_get_platdata(clk->dev);
|
|
struct at91_pmc *pmc = plat->reg_base;
|
|
ulong rate = gd->arch.mck_rate_hz;
|
|
|
|
if (readl(&pmc->mckr) & AT91_PMC_MCKR_H32MXDIV)
|
|
rate /= 2;
|
|
|
|
if (rate > H32MX_MAX_FREQ)
|
|
dev_dbg(clk->dev, "H32MX clock is too fast\n");
|
|
|
|
return rate;
|
|
}
|
|
|
|
static struct clk_ops sama5d4_h32mx_clk_ops = {
|
|
.get_rate = sama5d4_h32mx_clk_get_rate,
|
|
};
|
|
|
|
static int sama5d4_h32mx_clk_probe(struct udevice *dev)
|
|
{
|
|
return at91_pmc_core_probe(dev);
|
|
}
|
|
|
|
static const struct udevice_id sama5d4_h32mx_clk_match[] = {
|
|
{ .compatible = "atmel,sama5d4-clk-h32mx" },
|
|
{}
|
|
};
|
|
|
|
U_BOOT_DRIVER(sama5d4_h32mx_clk) = {
|
|
.name = "sama5d4-h32mx-clk",
|
|
.id = UCLASS_CLK,
|
|
.of_match = sama5d4_h32mx_clk_match,
|
|
.probe = sama5d4_h32mx_clk_probe,
|
|
.platdata_auto_alloc_size = sizeof(struct pmc_platdata),
|
|
.ops = &sama5d4_h32mx_clk_ops,
|
|
};
|