| // SPDX-License-Identifier: GPL-2.0+ |
| /* |
| * Copyright (C) 2015 Masahiro Yamada <yamada.masahiro@socionext.com> |
| */ |
| |
| #include <linux/bitops.h> |
| #include <linux/io.h> |
| |
| #include "../init.h" |
| #include "../sc-regs.h" |
| |
| void uniphier_pxs2_clk_init(void) |
| { |
| #ifdef CONFIG_USB_DWC3_UNIPHIER |
| u32 tmp; |
| |
| /* deassert reset */ |
| tmp = readl(sc_base + SC_RSTCTRL); |
| tmp |= SC_RSTCTRL_NRST_USB3B0 | SC_RSTCTRL_NRST_GIO; |
| writel(tmp, sc_base + SC_RSTCTRL); |
| readl(sc_base + SC_RSTCTRL); /* dummy read */ |
| |
| tmp = readl(sc_base + SC_RSTCTRL2); |
| tmp |= SC_RSTCTRL2_NRST_USB3B1; |
| writel(tmp, sc_base + SC_RSTCTRL2); |
| readl(sc_base + SC_RSTCTRL2); /* dummy read */ |
| |
| tmp = readl(sc_base + SC_RSTCTRL6); |
| tmp |= 0x37; |
| writel(tmp, sc_base + SC_RSTCTRL6); |
| |
| /* provide clocks */ |
| tmp = readl(sc_base + SC_CLKCTRL); |
| tmp |= BIT(20) | BIT(19) | SC_CLKCTRL_CEN_USB31 | SC_CLKCTRL_CEN_USB30 | |
| SC_CLKCTRL_CEN_GIO; |
| writel(tmp, sc_base + SC_CLKCTRL); |
| readl(sc_base + SC_CLKCTRL); /* dummy read */ |
| #endif |
| } |