xref: /openbmc/u-boot/drivers/power/ftpmu010.c (revision e8f80a5a)
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * (C) Copyright 2009 Faraday Technology
4  * Po-Yu Chuang <ratbert@faraday-tech.com>
5  *
6  * Copyright (C) 2010 Andes Technology Corporation
7  * Shawn Lin, Andes Technology Corporation <nobuhiro@andestech.com>
8  * Macpaul Lin, Andes Technology Corporation <macpaul@andestech.com>
9  */
10 
11 #include <common.h>
12 #include <asm/io.h>
13 #include <faraday/ftpmu010.h>
14 
15 /* OSCC: OSC Control Register */
ftpmu010_32768osc_enable(void)16 void ftpmu010_32768osc_enable(void)
17 {
18 	static struct ftpmu010 *pmu = (struct ftpmu010 *)CONFIG_FTPMU010_BASE;
19 	unsigned int oscc;
20 
21 	/* enable the 32768Hz oscillator */
22 	oscc = readl(&pmu->OSCC);
23 	oscc &= ~(FTPMU010_OSCC_OSCL_OFF | FTPMU010_OSCC_OSCL_TRI);
24 	writel(oscc, &pmu->OSCC);
25 
26 	/* wait until ready */
27 	while (!(readl(&pmu->OSCC) & FTPMU010_OSCC_OSCL_STABLE))
28 		;
29 
30 	/* select 32768Hz oscillator */
31 	oscc = readl(&pmu->OSCC);
32 	oscc |= FTPMU010_OSCC_OSCL_RTCLSEL;
33 	writel(oscc, &pmu->OSCC);
34 }
35 
36 /* MFPSR: Multi-Function Port Setting Register */
ftpmu010_mfpsr_select_dev(unsigned int dev)37 void ftpmu010_mfpsr_select_dev(unsigned int dev)
38 {
39 	static struct ftpmu010 *pmu = (struct ftpmu010 *)CONFIG_FTPMU010_BASE;
40 	unsigned int mfpsr;
41 
42 	mfpsr = readl(&pmu->MFPSR);
43 	mfpsr |= dev;
44 	writel(mfpsr, &pmu->MFPSR);
45 }
46 
ftpmu010_mfpsr_diselect_dev(unsigned int dev)47 void ftpmu010_mfpsr_diselect_dev(unsigned int dev)
48 {
49 	static struct ftpmu010 *pmu = (struct ftpmu010 *)CONFIG_FTPMU010_BASE;
50 	unsigned int mfpsr;
51 
52 	mfpsr = readl(&pmu->MFPSR);
53 	mfpsr &= ~dev;
54 	writel(mfpsr, &pmu->MFPSR);
55 }
56 
57 /* PDLLCR0: PLL/DLL Control Register 0 */
ftpmu010_dlldis_disable(void)58 void ftpmu010_dlldis_disable(void)
59 {
60 	static struct ftpmu010 *pmu = (struct ftpmu010 *)CONFIG_FTPMU010_BASE;
61 	unsigned int pdllcr0;
62 
63 	pdllcr0 = readl(&pmu->PDLLCR0);
64 	pdllcr0 |= FTPMU010_PDLLCR0_DLLDIS;
65 	writel(pdllcr0, &pmu->PDLLCR0);
66 }
67 
ftpmu010_sdram_clk_disable(unsigned int cr0)68 void ftpmu010_sdram_clk_disable(unsigned int cr0)
69 {
70 	static struct ftpmu010 *pmu = (struct ftpmu010 *)CONFIG_FTPMU010_BASE;
71 	unsigned int pdllcr0;
72 
73 	pdllcr0 = readl(&pmu->PDLLCR0);
74 	pdllcr0 |= FTPMU010_PDLLCR0_HCLKOUTDIS(cr0);
75 	writel(pdllcr0, &pmu->PDLLCR0);
76 }
77 
78 /* SDRAMHTC: SDRAM Signal Hold Time Control */
ftpmu010_sdramhtc_set(unsigned int val)79 void ftpmu010_sdramhtc_set(unsigned int val)
80 {
81 	static struct ftpmu010 *pmu = (struct ftpmu010 *)CONFIG_FTPMU010_BASE;
82 	unsigned int sdramhtc;
83 
84 	sdramhtc = readl(&pmu->SDRAMHTC);
85 	sdramhtc |= val;
86 	writel(sdramhtc, &pmu->SDRAMHTC);
87 }
88