51 lines
1.0 KiB
C
51 lines
1.0 KiB
C
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// SPDX-License-Identifier: GPL-2.0-only
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/*
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* linux/arch/arm/mach-pxa/pxa2xx.c
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*
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* code specific to pxa2xx
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*
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* Copyright (C) 2008 Dmitry Baryshkov
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/device.h>
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#include <linux/io.h>
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#include "pxa2xx-regs.h"
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#include "mfp-pxa25x.h"
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#include "generic.h"
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#include "reset.h"
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#include "smemc.h"
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#include <linux/soc/pxa/smemc.h>
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void pxa2xx_clear_reset_status(unsigned int mask)
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{
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/* RESET_STATUS_* has a 1:1 mapping with RCSR */
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RCSR = mask;
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}
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#define MDCNFG_DRAC2(mdcnfg) (((mdcnfg) >> 21) & 0x3)
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#define MDCNFG_DRAC0(mdcnfg) (((mdcnfg) >> 5) & 0x3)
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int pxa2xx_smemc_get_sdram_rows(void)
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{
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static int sdram_rows;
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unsigned int drac2 = 0, drac0 = 0;
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u32 mdcnfg;
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if (sdram_rows)
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return sdram_rows;
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mdcnfg = readl_relaxed(MDCNFG);
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if (mdcnfg & (MDCNFG_DE2 | MDCNFG_DE3))
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drac2 = MDCNFG_DRAC2(mdcnfg);
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if (mdcnfg & (MDCNFG_DE0 | MDCNFG_DE1))
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drac0 = MDCNFG_DRAC0(mdcnfg);
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sdram_rows = 1 << (11 + max(drac0, drac2));
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return sdram_rows;
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}
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