summaryrefslogtreecommitdiffstats
path: root/arch/sh/kernel/cpu/sh4a/clock-sh7785.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/sh/kernel/cpu/sh4a/clock-sh7785.c')
-rw-r--r--arch/sh/kernel/cpu/sh4a/clock-sh7785.c174
1 files changed, 174 insertions, 0 deletions
diff --git a/arch/sh/kernel/cpu/sh4a/clock-sh7785.c b/arch/sh/kernel/cpu/sh4a/clock-sh7785.c
new file mode 100644
index 000000000..fca351378
--- /dev/null
+++ b/arch/sh/kernel/cpu/sh4a/clock-sh7785.c
@@ -0,0 +1,174 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * arch/sh/kernel/cpu/sh4a/clock-sh7785.c
+ *
+ * SH7785 support for the clock framework
+ *
+ * Copyright (C) 2007 - 2010 Paul Mundt
+ */
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/clk.h>
+#include <linux/io.h>
+#include <linux/cpufreq.h>
+#include <linux/clkdev.h>
+#include <asm/clock.h>
+#include <asm/freq.h>
+#include <cpu/sh7785.h>
+
+/*
+ * Default rate for the root input clock, reset this with clk_set_rate()
+ * from the platform code.
+ */
+static struct clk extal_clk = {
+ .rate = 33333333,
+};
+
+static unsigned long pll_recalc(struct clk *clk)
+{
+ int multiplier;
+
+ multiplier = test_mode_pin(MODE_PIN4) ? 36 : 72;
+
+ return clk->parent->rate * multiplier;
+}
+
+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_U, DIV4_SH, DIV4_B, DIV4_DDR, DIV4_GA,
+ DIV4_DU, 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_DU] = DIV4(4, 0x0ff0, 0),
+ [DIV4_GA] = DIV4(8, 0x0030, 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_U] = DIV4(24, 0x000c, CLK_ENABLE_ON_INIT),
+ [DIV4_I] = DIV4(28, 0x000e, CLK_ENABLE_ON_INIT),
+};
+
+#define MSTPCR0 0xffc80030
+#define MSTPCR1 0xffc80034
+
+enum { MSTP029, MSTP028, MSTP027, MSTP026, MSTP025, MSTP024,
+ MSTP021, MSTP020, MSTP017, MSTP016,
+ MSTP013, MSTP012, MSTP009, MSTP008, MSTP003, MSTP002,
+ MSTP119, MSTP117, MSTP105, MSTP104, MSTP100,
+ MSTP_NR };
+
+static struct clk mstp_clks[MSTP_NR] = {
+ /* MSTPCR0 */
+ [MSTP029] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 29, 0),
+ [MSTP028] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 28, 0),
+ [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),
+ [MSTP021] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 21, 0),
+ [MSTP020] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 20, 0),
+ [MSTP017] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 17, 0),
+ [MSTP016] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 16, 0),
+ [MSTP013] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 13, 0),
+ [MSTP012] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 12, 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),
+
+ /* MSTPCR1 */
+ [MSTP119] = SH_CLK_MSTP32(NULL, MSTPCR1, 19, 0),
+ [MSTP117] = SH_CLK_MSTP32(NULL, MSTPCR1, 17, 0),
+ [MSTP105] = SH_CLK_MSTP32(NULL, MSTPCR1, 5, 0),
+ [MSTP104] = SH_CLK_MSTP32(NULL, MSTPCR1, 4, 0),
+ [MSTP100] = SH_CLK_MSTP32(NULL, MSTPCR1, 0, 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("du_clk", &div4_clks[DIV4_DU]),
+ CLKDEV_CON_ID("ga_clk", &div4_clks[DIV4_GA]),
+ 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("umem_clk", &div4_clks[DIV4_U]),
+ CLKDEV_CON_ID("cpu_clk", &div4_clks[DIV4_I]),
+
+ /* MSTP32 clocks */
+ CLKDEV_ICK_ID("fck", "sh-sci.5", &mstp_clks[MSTP029]),
+ CLKDEV_ICK_ID("fck", "sh-sci.4", &mstp_clks[MSTP028]),
+ CLKDEV_ICK_ID("fck", "sh-sci.3", &mstp_clks[MSTP027]),
+ CLKDEV_ICK_ID("fck", "sh-sci.2", &mstp_clks[MSTP026]),
+ CLKDEV_ICK_ID("fck", "sh-sci.1", &mstp_clks[MSTP025]),
+ CLKDEV_ICK_ID("fck", "sh-sci.0", &mstp_clks[MSTP024]),
+
+ CLKDEV_CON_ID("ssi1_fck", &mstp_clks[MSTP021]),
+ CLKDEV_CON_ID("ssi0_fck", &mstp_clks[MSTP020]),
+ CLKDEV_CON_ID("hac1_fck", &mstp_clks[MSTP017]),
+ CLKDEV_CON_ID("hac0_fck", &mstp_clks[MSTP016]),
+ CLKDEV_CON_ID("mmcif_fck", &mstp_clks[MSTP013]),
+ CLKDEV_CON_ID("flctl_fck", &mstp_clks[MSTP012]),
+
+ CLKDEV_ICK_ID("fck", "sh-tmu.0", &mstp_clks[MSTP008]),
+ CLKDEV_ICK_ID("fck", "sh-tmu.1", &mstp_clks[MSTP009]),
+
+ CLKDEV_CON_ID("siof_fck", &mstp_clks[MSTP003]),
+ CLKDEV_CON_ID("hspi_fck", &mstp_clks[MSTP002]),
+ CLKDEV_CON_ID("hudi_fck", &mstp_clks[MSTP119]),
+ CLKDEV_CON_ID("ubc0", &mstp_clks[MSTP117]),
+ CLKDEV_CON_ID("dmac_11_6_fck", &mstp_clks[MSTP105]),
+ CLKDEV_CON_ID("dmac_5_0_fck", &mstp_clks[MSTP104]),
+ CLKDEV_CON_ID("gdta_fck", &mstp_clks[MSTP100]),
+};
+
+int __init arch_clk_init(void)
+{
+ int i, ret = 0;
+
+ for (i = 0; i < ARRAY_SIZE(clks); i++)
+ ret |= clk_register(clks[i]);
+
+ clkdev_add_table(lookups, ARRAY_SIZE(lookups));
+
+ 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;
+}