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>
diff --git a/arch/arm/mach-uniphier/clk/clk-ph1-pro4.c b/arch/arm/mach-uniphier/clk/clk-ph1-pro4.c
new file mode 100644
index 0000000..2e1b20a
--- /dev/null
+++ b/arch/arm/mach-uniphier/clk/clk-ph1-pro4.c
@@ -0,0 +1,57 @@
+/*
+ * 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 */
+}