u-boot/arch/arm/mach-uniphier/clk/clk-ph1-pro4.c
Masahiro Yamada 323d1f9d5b ARM: uniphier: allow to enable multiple SoCs
Before this commit, the Kconfig menu in mach-uniphier only allowed us
to choose one SoC to be compiled.  Each SoC has its own defconfig file
for the build-test coverage.  Consequently, some defconfig files are
duplicated with only the difference in CONFIG_DEFAULT_DEVICE_TREE and
CONFIG_{SOC_NAME}=y.

Now, most of board-specific parameters have been moved to device trees,
so it makes sense to include init code of multiple SoCs into a single
image as long as the SoCs have similar architecture.  In fact, some
SoCs of UniPhier family are very similar:
 - PH1-LD4 and PH1-sLD8
 - PH1-LD6b and ProXstream2 (will be added in the upcoming commit)

This commit will be helpful to merge some defconfig files for better
maintainability.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2015-09-25 00:58:38 +09:00

57 lines
1.3 KiB
C

/*
* Copyright (C) 2011-2015 Masahiro Yamada <yamada.masahiro@socionext.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <linux/io.h>
#include <mach/init.h>
#include <mach/sc-regs.h>
void ph1_pro4_clk_init(void)
{
u32 tmp;
/* deassert reset */
tmp = readl(SC_RSTCTRL);
#ifdef CONFIG_USB_XHCI_UNIPHIER
tmp |= SC_RSTCTRL_NRST_USB3B0 | SC_RSTCTRL_NRST_USB3C0 |
SC_RSTCTRL_NRST_GIO;
#endif
#ifdef CONFIG_UNIPHIER_ETH
tmp |= SC_RSTCTRL_NRST_ETHER;
#endif
#ifdef CONFIG_USB_EHCI_UNIPHIER
tmp |= SC_RSTCTRL_NRST_STDMAC;
#endif
#ifdef CONFIG_NAND_DENALI
tmp |= SC_RSTCTRL_NRST_NAND;
#endif
writel(tmp, SC_RSTCTRL);
readl(SC_RSTCTRL); /* dummy read */
#ifdef CONFIG_USB_XHCI_UNIPHIER
tmp = readl(SC_RSTCTRL2);
tmp |= SC_RSTCTRL2_NRST_USB3B1 | SC_RSTCTRL2_NRST_USB3C1;
writel(tmp, SC_RSTCTRL2);
readl(SC_RSTCTRL2); /* dummy read */
#endif
/* privide clocks */
tmp = readl(SC_CLKCTRL);
#ifdef CONFIG_USB_XHCI_UNIPHIER
tmp |= SC_CLKCTRL_CEN_USB31 | SC_CLKCTRL_CEN_USB30 |
SC_CLKCTRL_CEN_GIO;
#endif
#ifdef CONFIG_UNIPHIER_ETH
tmp |= SC_CLKCTRL_CEN_ETHER;
#endif
#ifdef CONFIG_USB_EHCI_UNIPHIER
tmp |= SC_CLKCTRL_CEN_MIO | SC_CLKCTRL_CEN_STDMAC;
#endif
#ifdef CONFIG_NAND_DENALI
tmp |= SC_CLKCTRL_CEN_NAND;
#endif
writel(tmp, SC_CLKCTRL);
readl(SC_CLKCTRL); /* dummy read */
}