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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2013-2014 Panasonic Corporation
* Copyright (C) 2015-2016 Socionext Inc.
*/
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/io.h>
#include "../init.h"
#include "../sc-regs.h"
#undef DPLL_SSC_RATE_1PER
int uniphier_ld4_dpll_init(const struct uniphier_board_data *bd)
{
unsigned int dram_freq = bd->dram_freq;
u32 tmp;
/*
* Set Frequency
* Set 0xc(1600MHz)/0xd(1333MHz)/0xe(1066MHz)
* to FOUT (DPLLCTRL.bit[29:20])
*/
tmp = readl(sc_base + SC_DPLLCTRL);
tmp &= ~0x000f0000;
switch (dram_freq) {
case 1333:
tmp |= 0x000d0000;
break;
case 1600:
tmp |= 0x000c0000;
break;
default:
pr_err("Unsupported frequency");
return -EINVAL;
}
#if defined(DPLL_SSC_RATE_1PER)
tmp &= ~SC_DPLLCTRL_SSC_RATE;
#else
tmp |= SC_DPLLCTRL_SSC_RATE;
#endif
writel(tmp, sc_base + SC_DPLLCTRL);
tmp = readl(sc_base + SC_DPLLCTRL2);
tmp |= SC_DPLLCTRL2_NRSTDS;
writel(tmp, sc_base + SC_DPLLCTRL2);
/* Wait 500 usec until dpll gets stable */
udelay(500);
return 0;
}
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