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1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * Copyright (C) 2015 Masahiro Yamada <yamada.masahiro@socionext.com>
4  */
5 
6 #include <linux/bitops.h>
7 #include <linux/io.h>
8 
9 #include "../init.h"
10 #include "../sc-regs.h"
11 
uniphier_pxs2_clk_init(void)12 void uniphier_pxs2_clk_init(void)
13 {
14 	u32 tmp;
15 
16 	/* deassert reset */
17 	tmp = readl(SC_RSTCTRL);
18 #ifdef CONFIG_USB_DWC3_UNIPHIER
19 	tmp |= SC_RSTCTRL_NRST_USB3B0 | SC_RSTCTRL_NRST_GIO;
20 #endif
21 #ifdef CONFIG_NAND_DENALI
22 	tmp |= SC_RSTCTRL_NRST_NAND;
23 #endif
24 	writel(tmp, SC_RSTCTRL);
25 	readl(SC_RSTCTRL); /* dummy read */
26 
27 #ifdef CONFIG_USB_DWC3_UNIPHIER
28 	tmp = readl(SC_RSTCTRL2);
29 	tmp |= SC_RSTCTRL2_NRST_USB3B1;
30 	writel(tmp, SC_RSTCTRL2);
31 	readl(SC_RSTCTRL2); /* dummy read */
32 
33 	tmp = readl(SC_RSTCTRL6);
34 	tmp |= 0x37;
35 	writel(tmp, SC_RSTCTRL6);
36 #endif
37 
38 	/* provide clocks */
39 	tmp = readl(SC_CLKCTRL);
40 #ifdef CONFIG_USB_DWC3_UNIPHIER
41 	tmp |= BIT(20) | BIT(19) | SC_CLKCTRL_CEN_USB31 | SC_CLKCTRL_CEN_USB30 |
42 		SC_CLKCTRL_CEN_GIO;
43 #endif
44 #ifdef CONFIG_NAND_DENALI
45 	tmp |= SC_CLKCTRL_CEN_NAND;
46 #endif
47 	writel(tmp, SC_CLKCTRL);
48 	readl(SC_CLKCTRL); /* dummy read */
49 }
50