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authorYoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>2010-07-06 04:32:05 +0000
committerPaul Mundt <lethal@linux-sh.org>2010-07-06 17:38:30 +0900
commit56c52986b163575402c2db83b2fec60234ace1e9 (patch)
treec78a9fc253330bd709e8f31e6396cd3d4c7da62e /arch/sh/kernel/cpu/sh4a/clock-sh7757.c
parent3810e96056ffddf68305f6d11d2d5103ec1f605d (diff)
sh: modify clock framework of SH7757
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh/kernel/cpu/sh4a/clock-sh7757.c')
-rw-r--r--arch/sh/kernel/cpu/sh4a/clock-sh7757.c199
1 files changed, 111 insertions, 88 deletions
diff --git a/arch/sh/kernel/cpu/sh4a/clock-sh7757.c b/arch/sh/kernel/cpu/sh4a/clock-sh7757.c
index 0a752bd324ac..ce39a2ae8c6c 100644
--- a/arch/sh/kernel/cpu/sh4a/clock-sh7757.c
+++ b/arch/sh/kernel/cpu/sh4a/clock-sh7757.c
@@ -3,7 +3,7 @@
*
* SH7757 support for the clock framework
*
- * Copyright (C) 2009 Renesas Solutions Corp.
+ * Copyright (C) 2009-2010 Renesas Solutions Corp.
*
* 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
@@ -16,124 +16,147 @@
#include <asm/clock.h>
#include <asm/freq.h>
-static int ifc_divisors[] = { 2, 1, 4, 1, 1, 8, 1, 1,
- 16, 1, 1, 32, 1, 1, 1, 1 };
-static int sfc_divisors[] = { 2, 1, 4, 1, 1, 8, 1, 1,
- 16, 1, 1, 32, 1, 1, 1, 1 };
-static int bfc_divisors[] = { 2, 1, 4, 1, 1, 8, 1, 1,
- 16, 1, 1, 32, 1, 1, 1, 1 };
-static int p1fc_divisors[] = { 2, 1, 4, 1, 1, 8, 1, 1,
- 16, 1, 1, 32, 1, 1, 1, 1 };
+/*
+ * Default rate for the root input clock, reset this with clk_set_rate()
+ * from the platform code.
+ */
+static struct clk extal_clk = {
+ .rate = 48000000,
+};
-static void master_clk_init(struct clk *clk)
+static unsigned long pll_recalc(struct clk *clk)
{
- clk->rate = CONFIG_SH_PCLK_FREQ * 16;
-}
+ int multiplier;
-static struct clk_ops sh7757_master_clk_ops = {
- .init = master_clk_init,
-};
+ multiplier = test_mode_pin(MODE_PIN0) ? 24 : 16;
-static void module_clk_recalc(struct clk *clk)
-{
- int idx = __raw_readl(FRQCR) & 0x0000000f;
- clk->rate = clk->parent->rate / p1fc_divisors[idx];
+ return clk->parent->rate * multiplier;
}
-static struct clk_ops sh7757_module_clk_ops = {
- .recalc = module_clk_recalc,
+static struct clk_ops pll_clk_ops = {
+ .recalc = pll_recalc,
};
-static void bus_clk_recalc(struct clk *clk)
-{
- int idx = (__raw_readl(FRQCR) >> 8) & 0x0000000f;
- clk->rate = clk->parent->rate / bfc_divisors[idx];
-}
+static struct clk pll_clk = {
+ .ops = &pll_clk_ops,
+ .parent = &extal_clk,
+ .flags = CLK_ENABLE_ON_INIT,
+};
-static struct clk_ops sh7757_bus_clk_ops = {
- .recalc = bus_clk_recalc,
+static struct clk *clks[] = {
+ &extal_clk,
+ &pll_clk,
};
-static void cpu_clk_recalc(struct clk *clk)
-{
- int idx = (__raw_readl(FRQCR) >> 20) & 0x0000000f;
- clk->rate = clk->parent->rate / ifc_divisors[idx];
-}
+static unsigned int div2[] = { 1, 1, 2, 1, 1, 4, 1, 6,
+ 1, 1, 1, 16, 1, 24, 1, 1 };
-static struct clk_ops sh7757_cpu_clk_ops = {
- .recalc = cpu_clk_recalc,
+static struct clk_div_mult_table div4_div_mult_table = {
+ .divisors = div2,
+ .nr_divisors = ARRAY_SIZE(div2),
};
-static struct clk_ops *sh7757_clk_ops[] = {
- &sh7757_master_clk_ops,
- &sh7757_module_clk_ops,
- &sh7757_bus_clk_ops,
- &sh7757_cpu_clk_ops,
+static struct clk_div4_table div4_table = {
+ .div_mult_table = &div4_div_mult_table,
};
-void __init arch_init_clk_ops(struct clk_ops **ops, int idx)
-{
- if (idx < ARRAY_SIZE(sh7757_clk_ops))
- *ops = sh7757_clk_ops[idx];
-}
+enum { DIV4_I, DIV4_SH, DIV4_P, DIV4_NR };
-static void shyway_clk_recalc(struct clk *clk)
-{
- int idx = (__raw_readl(FRQCR) >> 12) & 0x0000000f;
- clk->rate = clk->parent->rate / sfc_divisors[idx];
-}
-
-static struct clk_ops sh7757_shyway_clk_ops = {
- .recalc = shyway_clk_recalc,
-};
+#define DIV4(_bit, _mask, _flags) \
+ SH_CLK_DIV4(&pll_clk, FRQCR, _bit, _mask, _flags)
-static struct clk sh7757_shyway_clk = {
- .flags = CLK_ENABLE_ON_INIT,
- .ops = &sh7757_shyway_clk_ops,
+struct clk div4_clks[DIV4_NR] = {
+ /*
+ * P clock is always enable, because some P clock modules is used
+ * by Host PC.
+ */
+ [DIV4_P] = DIV4(0, 0x2800, CLK_ENABLE_ON_INIT),
+ [DIV4_SH] = DIV4(12, 0x00a0, CLK_ENABLE_ON_INIT),
+ [DIV4_I] = DIV4(20, 0x0004, CLK_ENABLE_ON_INIT),
};
-/*
- * Additional sh7757-specific on-chip clocks that aren't already part of the
- * clock framework
- */
-static struct clk *sh7757_onchip_clocks[] = {
- &sh7757_shyway_clk,
+#define MSTPCR0 0xffc80030
+#define MSTPCR1 0xffc80034
+
+enum { MSTP004, MSTP000, MSTP114, MSTP113, MSTP112,
+ MSTP111, MSTP110, MSTP103, MSTP102,
+ MSTP_NR };
+
+static struct clk mstp_clks[MSTP_NR] = {
+ /* MSTPCR0 */
+ [MSTP004] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 4, 0),
+ [MSTP000] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 0, 0),
+
+ /* MSTPCR1 */
+ [MSTP114] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR1, 14, 0),
+ [MSTP113] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR1, 13, 0),
+ [MSTP112] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR1, 12, 0),
+ [MSTP111] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR1, 11, 0),
+ [MSTP110] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR1, 10, 0),
+ [MSTP103] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR1, 3, 0),
+ [MSTP102] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR1, 2, 0),
};
#define CLKDEV_CON_ID(_id, _clk) { .con_id = _id, .clk = _clk }
static struct clk_lookup lookups[] = {
/* main clocks */
- CLKDEV_CON_ID("shyway_clk", &sh7757_shyway_clk),
+ 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("shyway_clk", &div4_clks[DIV4_SH]),
+ CLKDEV_CON_ID("cpu_clk", &div4_clks[DIV4_I]),
+
+ /* MSTP32 clocks */
+ CLKDEV_CON_ID("sdhi0", &mstp_clks[MSTP004]),
+ CLKDEV_CON_ID("riic", &mstp_clks[MSTP000]),
+ {
+ /* TMU0 */
+ .dev_id = "sh_tmu.0",
+ .con_id = "tmu_fck",
+ .clk = &mstp_clks[MSTP113],
+ }, {
+ /* TMU1 */
+ .dev_id = "sh_tmu.1",
+ .con_id = "tmu_fck",
+ .clk = &mstp_clks[MSTP114],
+ },
+ {
+ /* SCIF4 (But, ID is 2) */
+ .dev_id = "sh-sci.2",
+ .con_id = "sci_fck",
+ .clk = &mstp_clks[MSTP112],
+ }, {
+ /* SCIF3 */
+ .dev_id = "sh-sci.1",
+ .con_id = "sci_fck",
+ .clk = &mstp_clks[MSTP111],
+ }, {
+ /* SCIF2 */
+ .dev_id = "sh-sci.0",
+ .con_id = "sci_fck",
+ .clk = &mstp_clks[MSTP110],
+ },
+ CLKDEV_CON_ID("usb0", &mstp_clks[MSTP102]),
};
-static int __init sh7757_clk_init(void)
+int __init arch_clk_init(void)
{
- struct clk *clk = clk_get(NULL, "master_clk");
- int i;
-
- for (i = 0; i < ARRAY_SIZE(sh7757_onchip_clocks); i++) {
- struct clk *clkp = sh7757_onchip_clocks[i];
+ int i, ret = 0;
- clkp->parent = clk;
- clk_register(clkp);
- clk_enable(clkp);
- }
+ 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]);
- /*
- * Now that we have the rest of the clocks registered, we need to
- * force the parent clock to propagate so that these clocks will
- * automatically figure out their rate. We cheat by handing the
- * parent clock its current rate and forcing child propagation.
- */
- clk_set_rate(clk, clk_get_rate(clk));
+ if (!ret)
+ ret = sh_clk_div4_register(div4_clks, ARRAY_SIZE(div4_clks),
+ &div4_table);
+ if (!ret)
+ ret = sh_clk_mstp32_register(mstp_clks, MSTP_NR);
- clk_put(clk);
-
- clkdev_add_table(lookups, ARRAY_SIZE(lookups));
-
- return 0;
+ return ret;
}
-arch_initcall(sh7757_clk_init);
-