1 /* 2 * Copyright (C) 2015 Masahiro Yamada <yamada.masahiro@socionext.com> 3 * 4 * SPDX-License-Identifier: GPL-2.0+ 5 */ 6 7 #include <linux/bitops.h> 8 #include <linux/io.h> 9 10 #include "../init.h" 11 #include "../sc-regs.h" 12 13 void uniphier_pxs2_clk_init(void) 14 { 15 u32 tmp; 16 17 /* deassert reset */ 18 tmp = readl(SC_RSTCTRL); 19 #ifdef CONFIG_USB_XHCI_UNIPHIER 20 tmp |= SC_RSTCTRL_NRST_USB3B0 | SC_RSTCTRL_NRST_GIO; 21 #endif 22 #ifdef CONFIG_UNIPHIER_ETH 23 tmp |= SC_RSTCTRL_NRST_ETHER; 24 #endif 25 #ifdef CONFIG_NAND_DENALI 26 tmp |= SC_RSTCTRL_NRST_NAND; 27 #endif 28 writel(tmp, SC_RSTCTRL); 29 readl(SC_RSTCTRL); /* dummy read */ 30 31 #ifdef CONFIG_USB_XHCI_UNIPHIER 32 tmp = readl(SC_RSTCTRL2); 33 tmp |= SC_RSTCTRL2_NRST_USB3B1; 34 writel(tmp, SC_RSTCTRL2); 35 readl(SC_RSTCTRL2); /* dummy read */ 36 37 tmp = readl(SC_RSTCTRL6); 38 tmp |= 0x37; 39 writel(tmp, SC_RSTCTRL6); 40 #endif 41 42 /* provide clocks */ 43 tmp = readl(SC_CLKCTRL); 44 #ifdef CONFIG_USB_XHCI_UNIPHIER 45 tmp |= BIT(20) | BIT(19) | SC_CLKCTRL_CEN_USB31 | SC_CLKCTRL_CEN_USB30 | 46 SC_CLKCTRL_CEN_GIO; 47 #endif 48 #ifdef CONFIG_UNIPHIER_ETH 49 tmp |= SC_CLKCTRL_CEN_ETHER; 50 #endif 51 #ifdef CONFIG_NAND_DENALI 52 tmp |= SC_CLKCTRL_CEN_NAND; 53 #endif 54 writel(tmp, SC_CLKCTRL); 55 readl(SC_CLKCTRL); /* dummy read */ 56 } 57