GK SDK 源码库: XMIPCLinuxV100R005C00SPC030 (kernel/tools/open_source excluded)

source/bootloader/u-boot-2020.01/arch/arm/mach-uniphier/clk/dpll-sld8.c

@@ -0,0 +1,61 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2013-2014 Panasonic Corporation
+ * Copyright (C) 2015-2016 Socionext Inc.
+ */
+
+#include <linux/delay.h>
+#include <linux/io.h>
+
+#include "../init.h"
+#include "../sc-regs.h"
+
+int uniphier_sld8_dpll_init(const struct uniphier_board_data *bd)
+{
+	u32 tmp;
+	/*
+	 * Set DPLL SSC parameters for DPLLCTRL3
+	 * [23]    DIVN_TEST    0x1
+	 * [22:16] DIVN         0x50
+	 * [10]    FREFSEL_TEST 0x1
+	 * [9:8]   FREFSEL      0x2
+	 * [4]     ICPD_TEST    0x1
+	 * [3:0]   ICPD         0xb
+	 */
+	tmp = readl(sc_base + SC_DPLLCTRL3);
+	tmp &= ~0x00ff0717;
+	tmp |= 0x00d0061b;
+	writel(tmp, sc_base + SC_DPLLCTRL3);
+
+	/*
+	 * Set DPLL SSC parameters for DPLLCTRL
+	 *                    <-1%>          <-2%>
+	 * [29:20] SSC_UPCNT 132 (0x084)    132  (0x084)
+	 * [14:0]  SSC_dK    6335(0x18bf)   12710(0x31a6)
+	 */
+	tmp = readl(sc_base + SC_DPLLCTRL);
+	tmp &= ~0x3ff07fff;
+#ifdef DPLL_SSC_RATE_1PER
+	tmp |= 0x084018bf;
+#else
+	tmp |= 0x084031a6;
+#endif
+	writel(tmp, sc_base + SC_DPLLCTRL);
+
+	/*
+	 * Set DPLL SSC parameters for DPLLCTRL2
+	 * [31:29]  SSC_STEP     0
+	 * [27]     SSC_REG_REF  1
+	 * [26:20]  SSC_M        79     (0x4f)
+	 * [19:0]   SSC_K        964689 (0xeb851)
+	 */
+	tmp = readl(sc_base + SC_DPLLCTRL2);
+	tmp &= ~0xefffffff;
+	tmp |= 0x0cfeb851;
+	writel(tmp, sc_base + SC_DPLLCTRL2);
+
+	/* Wait 500 usec until dpll gets stable */
+	udelay(500);
+
+	return 0;
+}