u-boot/drivers/power/ftpmu010.c

/*
 * (C) Copyright 2009 Faraday Technology
 * Po-Yu Chuang <ratbert@faraday-tech.com>
 *
 * Copyright (C) 2010 Andes Technology Corporation
 * Shawn Lin, Andes Technology Corporation <nobuhiro@andestech.com>
 * Macpaul Lin, Andes Technology Corporation <macpaul@andestech.com>
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

#include <common.h>
#include <asm/io.h>
#include <faraday/ftpmu010.h>

/* OSCC: OSC Control Register */
void ftpmu010_32768osc_enable(void)
{
	static struct ftpmu010 *pmu = (struct ftpmu010 *)CONFIG_FTPMU010_BASE;
	unsigned int oscc;

	/* enable the 32768Hz oscillator */
	oscc = readl(&pmu->OSCC);
	oscc &= ~(FTPMU010_OSCC_OSCL_OFF | FTPMU010_OSCC_OSCL_TRI);
	writel(oscc, &pmu->OSCC);

	/* wait until ready */
	while (!(readl(&pmu->OSCC) & FTPMU010_OSCC_OSCL_STABLE))
		;

	/* select 32768Hz oscillator */
	oscc = readl(&pmu->OSCC);
	oscc |= FTPMU010_OSCC_OSCL_RTCLSEL;
	writel(oscc, &pmu->OSCC);
}

/* MFPSR: Multi-Function Port Setting Register */
void ftpmu010_mfpsr_select_dev(unsigned int dev)
{
	static struct ftpmu010 *pmu = (struct ftpmu010 *)CONFIG_FTPMU010_BASE;
	unsigned int mfpsr;

	mfpsr = readl(&pmu->MFPSR);
	mfpsr |= dev;
	writel(mfpsr, &pmu->MFPSR);
}

void ftpmu010_mfpsr_diselect_dev(unsigned int dev)
{
	static struct ftpmu010 *pmu = (struct ftpmu010 *)CONFIG_FTPMU010_BASE;
	unsigned int mfpsr;

	mfpsr = readl(&pmu->MFPSR);
	mfpsr &= ~dev;
	writel(mfpsr, &pmu->MFPSR);
}

/* PDLLCR0: PLL/DLL Control Register 0 */
void ftpmu010_dlldis_disable(void)
{
	static struct ftpmu010 *pmu = (struct ftpmu010 *)CONFIG_FTPMU010_BASE;
	unsigned int pdllcr0;

	pdllcr0 = readl(&pmu->PDLLCR0);
	pdllcr0 |= FTPMU010_PDLLCR0_DLLDIS;
	writel(pdllcr0, &pmu->PDLLCR0);
}

void ftpmu010_sdram_clk_disable(unsigned int cr0)
{
	static struct ftpmu010 *pmu = (struct ftpmu010 *)CONFIG_FTPMU010_BASE;
	unsigned int pdllcr0;

	pdllcr0 = readl(&pmu->PDLLCR0);
	pdllcr0 |= FTPMU010_PDLLCR0_HCLKOUTDIS(cr0);
	writel(pdllcr0, &pmu->PDLLCR0);
}

/* SDRAMHTC: SDRAM Signal Hold Time Control */
void ftpmu010_sdramhtc_set(unsigned int val)
{
	static struct ftpmu010 *pmu = (struct ftpmu010 *)CONFIG_FTPMU010_BASE;
	unsigned int sdramhtc;

	sdramhtc = readl(&pmu->SDRAMHTC);
	sdramhtc |= val;
	writel(sdramhtc, &pmu->SDRAMHTC);
}