--- /dev/null
+/*
+ * arch/sh/kernel/cpu/sh4/clock-shx3.c
+ *
+ * SH-X3 support for the clock framework
+ *
+ * Copyright (C) 2006-2007 Renesas Technology Corp.
+ * Copyright (C) 2006-2007 Renesas Solutions Corp.
+ * Copyright (C) 2006-2010 Paul Mundt
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/io.h>
+#include <linux/clkdev.h>
+#include <asm/clock.h>
+#include <asm/freq.h>
+
+/*
+ * Default rate for the root input clock, reset this with clk_set_rate()
+ * from the platform code.
+ */
+static struct clk extal_clk = {
+ .rate = 16666666,
+};
+
+static unsigned long pll_recalc(struct clk *clk)
+{
+ /* PLL1 has a fixed x72 multiplier. */
+ return clk->parent->rate * 72;
+}
+
+static struct sh_clk_ops pll_clk_ops = {
+ .recalc = pll_recalc,
+};
+
+static struct clk pll_clk = {
+ .ops = &pll_clk_ops,
+ .parent = &extal_clk,
+ .flags = CLK_ENABLE_ON_INIT,
+};
+
+static struct clk *clks[] = {
+ &extal_clk,
+ &pll_clk,
+};
+
+static unsigned int div2[] = { 1, 2, 4, 6, 8, 12, 16, 18,
+ 24, 32, 36, 48 };
+
+static struct clk_div_mult_table div4_div_mult_table = {
+ .divisors = div2,
+ .nr_divisors = ARRAY_SIZE(div2),
+};
+
+static struct clk_div4_table div4_table = {
+ .div_mult_table = &div4_div_mult_table,
+};
+
+enum { DIV4_I, DIV4_SH, DIV4_B, DIV4_DDR, DIV4_SHA, DIV4_P, DIV4_NR };
+
+#define DIV4(_bit, _mask, _flags) \
+ SH_CLK_DIV4(&pll_clk, FRQMR1, _bit, _mask, _flags)
+
+struct clk div4_clks[DIV4_NR] = {
+ [DIV4_P] = DIV4(0, 0x0f80, 0),
+ [DIV4_SHA] = DIV4(4, 0x0ff0, 0),
+ [DIV4_DDR] = DIV4(12, 0x000c, CLK_ENABLE_ON_INIT),
+ [DIV4_B] = DIV4(16, 0x0fe0, CLK_ENABLE_ON_INIT),
+ [DIV4_SH] = DIV4(20, 0x000c, CLK_ENABLE_ON_INIT),
+ [DIV4_I] = DIV4(28, 0x000e, CLK_ENABLE_ON_INIT),
+};
+
+#define MSTPCR0 0xffc00030
+#define MSTPCR1 0xffc00034
+
+enum { MSTP027, MSTP026, MSTP025, MSTP024,
+ MSTP009, MSTP008, MSTP003, MSTP002,
+ MSTP001, MSTP000, MSTP119, MSTP105,
+ MSTP104, MSTP_NR };
+
+static struct clk mstp_clks[MSTP_NR] = {
+ /* MSTPCR0 */
+ [MSTP027] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 27, 0),
+ [MSTP026] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 26, 0),
+ [MSTP025] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 25, 0),
+ [MSTP024] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 24, 0),
+ [MSTP009] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 9, 0),
+ [MSTP008] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 8, 0),
+ [MSTP003] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 3, 0),
+ [MSTP002] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 2, 0),
+ [MSTP001] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 1, 0),
+ [MSTP000] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 0, 0),
+
+ /* MSTPCR1 */
+ [MSTP119] = SH_CLK_MSTP32(NULL, MSTPCR1, 19, 0),
+ [MSTP105] = SH_CLK_MSTP32(NULL, MSTPCR1, 5, 0),
+ [MSTP104] = SH_CLK_MSTP32(NULL, MSTPCR1, 4, 0),
+};
+
+static struct clk_lookup lookups[] = {
+ /* main clocks */
+ CLKDEV_CON_ID("extal", &extal_clk),
+ CLKDEV_CON_ID("pll_clk", &pll_clk),
+
+ /* DIV4 clocks */
+ CLKDEV_CON_ID("peripheral_clk", &div4_clks[DIV4_P]),
+ CLKDEV_CON_ID("shywaya_clk", &div4_clks[DIV4_SHA]),
+ CLKDEV_CON_ID("ddr_clk", &div4_clks[DIV4_DDR]),
+ CLKDEV_CON_ID("bus_clk", &div4_clks[DIV4_B]),
+ CLKDEV_CON_ID("shyway_clk", &div4_clks[DIV4_SH]),
+ CLKDEV_CON_ID("cpu_clk", &div4_clks[DIV4_I]),
+
+ /* MSTP32 clocks */
+ CLKDEV_ICK_ID("sci_fck", "sh-sci.3", &mstp_clks[MSTP027]),
+ CLKDEV_ICK_ID("sci_fck", "sh-sci.2", &mstp_clks[MSTP026]),
+ CLKDEV_ICK_ID("sci_fck", "sh-sci.1", &mstp_clks[MSTP025]),
+ CLKDEV_ICK_ID("sci_fck", "sh-sci.0", &mstp_clks[MSTP024]),
+
+ CLKDEV_CON_ID("h8ex_fck", &mstp_clks[MSTP003]),
+ CLKDEV_CON_ID("csm_fck", &mstp_clks[MSTP002]),
+ CLKDEV_CON_ID("fe1_fck", &mstp_clks[MSTP001]),
+ CLKDEV_CON_ID("fe0_fck", &mstp_clks[MSTP000]),
+
+ CLKDEV_ICK_ID("fck", "sh-tmu.0", &mstp_clks[MSTP008]),
+ CLKDEV_ICK_ID("fck", "sh-tmu.1", &mstp_clks[MSTP009]),
+
+ CLKDEV_CON_ID("hudi_fck", &mstp_clks[MSTP119]),
+ CLKDEV_CON_ID("dmac_11_6_fck", &mstp_clks[MSTP105]),
+ CLKDEV_CON_ID("dmac_5_0_fck", &mstp_clks[MSTP104]),
+};
+
+int __init arch_clk_init(void)
+{
+ int i, ret = 0;
+
+ for (i = 0; i < ARRAY_SIZE(clks); i++)
+ ret |= clk_register(clks[i]);
+ for (i = 0; i < ARRAY_SIZE(lookups); i++)
+ clkdev_add(&lookups[i]);
+
+ if (!ret)
+ ret = sh_clk_div4_register(div4_clks, ARRAY_SIZE(div4_clks),
+ &div4_table);
+ if (!ret)
+ ret = sh_clk_mstp_register(mstp_clks, MSTP_NR);
+
+ return ret;
+}
Code Review / kvmfornfv.git / blobdiff