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-rw-r--r--arch/arm/mach-uniphier/early-clk/early-clk-proxstream2.c44
1 files changed, 44 insertions, 0 deletions
diff --git a/arch/arm/mach-uniphier/early-clk/early-clk-proxstream2.c b/arch/arm/mach-uniphier/early-clk/early-clk-proxstream2.c
new file mode 100644
index 0000000000..c303f16a57
--- /dev/null
+++ b/arch/arm/mach-uniphier/early-clk/early-clk-proxstream2.c
@@ -0,0 +1,44 @@
+/*
+ * Copyright (C) 2015 Masahiro Yamada <yamada.masahiro@socionext.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <spl.h>
+#include <linux/io.h>
+#include <mach/init.h>
+#include <mach/sc-regs.h>
+
+int proxstream2_early_clk_init(const struct uniphier_board_data *bd)
+{
+ u32 tmp;
+
+ /* deassert reset */
+ if (spl_boot_device() != BOOT_DEVICE_NAND) {
+ tmp = readl(SC_RSTCTRL);
+ tmp &= ~SC_RSTCTRL_NRST_NAND;
+ writel(tmp, SC_RSTCTRL);
+ };
+
+ tmp = readl(SC_RSTCTRL4);
+ tmp |= SC_RSTCTRL4_NRST_UMCSB | SC_RSTCTRL4_NRST_UMCA2 |
+ SC_RSTCTRL4_NRST_UMCA1 | SC_RSTCTRL4_NRST_UMCA0 |
+ SC_RSTCTRL4_NRST_UMC32 | SC_RSTCTRL4_NRST_UMC31 |
+ SC_RSTCTRL4_NRST_UMC30;
+ writel(tmp, SC_RSTCTRL4);
+ readl(SC_RSTCTRL4); /* dummy read */
+
+ /* privide clocks */
+ tmp = readl(SC_CLKCTRL);
+ tmp |= SC_CLKCTRL_CEN_SBC | SC_CLKCTRL_CEN_PERI;
+ writel(tmp, SC_CLKCTRL);
+
+ tmp = readl(SC_CLKCTRL4);
+ tmp |= SC_CLKCTRL4_CEN_UMCSB | SC_CLKCTRL4_CEN_UMC2 |
+ SC_CLKCTRL4_CEN_UMC1 | SC_CLKCTRL4_CEN_UMC0;
+ writel(tmp, SC_CLKCTRL4);
+ readl(SC_CLKCTRL4); /* dummy read */
+
+ return 0;
+}
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