*
* SH7786 support for the clock framework
*
- * Copyright (C) 2008, 2009 Renesas Solutions Corp.
- * Kuninori Morimoto <morimoto.kuninori@renesas.com>
- *
- * Based on SH7785
- * Copyright (C) 2007 Paul Mundt
+ * Copyright (C) 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
*/
#include <linux/init.h>
#include <linux/kernel.h>
+#include <linux/clk.h>
+#include <linux/io.h>
#include <asm/clock.h>
#include <asm/freq.h>
-#include <asm/io.h>
-
-static int ifc_divisors[] = { 1, 2, 4, 1 };
-static int sfc_divisors[] = { 1, 1, 4, 1 };
-static int bfc_divisors[] = { 1, 1, 1, 1, 1, 12, 16, 1,
- 24, 32, 1, 1, 1, 1, 1, 1 };
-static int mfc_divisors[] = { 1, 1, 4, 1 };
-static int pfc_divisors[] = { 1, 1, 1, 1, 1, 1, 16, 1,
- 24, 32, 1, 48, 1, 1, 1, 1 };
-static void master_clk_init(struct clk *clk)
-{
- clk->rate *= pfc_divisors[ctrl_inl(FRQMR1) & 0x000f];
-}
-
-static struct clk_ops sh7786_master_clk_ops = {
- .init = master_clk_init,
+/*
+ * Default rate for the root input clock, reset this with clk_set_rate()
+ * from the platform code.
+ */
+static struct clk extal_clk = {
+ .name = "extal",
+ .id = -1,
+ .rate = 33333333,
};
-static unsigned long module_clk_recalc(struct clk *clk)
+static unsigned long pll_recalc(struct clk *clk)
{
- int idx = (ctrl_inl(FRQMR1) & 0x000f);
- return clk->parent->rate / pfc_divisors[idx];
-}
+ int multiplier;
-static struct clk_ops sh7786_module_clk_ops = {
- .recalc = module_clk_recalc,
-};
+ /*
+ * Clock modes 0, 1, and 2 use an x64 multiplier against PLL1,
+ * while modes 3, 4, and 5 use an x32.
+ */
+ multiplier = (sh_mv.mv_mode_pins() & 0xf) < 3 ? 64 : 32;
-static unsigned long bus_clk_recalc(struct clk *clk)
-{
- int idx = ((ctrl_inl(FRQMR1) >> 16) & 0x000f);
- return clk->parent->rate / bfc_divisors[idx];
+ return clk->parent->rate * multiplier;
}
-static struct clk_ops sh7786_bus_clk_ops = {
- .recalc = bus_clk_recalc,
+static struct clk_ops pll_clk_ops = {
+ .recalc = pll_recalc,
};
-static unsigned long cpu_clk_recalc(struct clk *clk)
-{
- int idx = ((ctrl_inl(FRQMR1) >> 28) & 0x0003);
- return clk->parent->rate / ifc_divisors[idx];
-}
-
-static struct clk_ops sh7786_cpu_clk_ops = {
- .recalc = cpu_clk_recalc,
+static struct clk pll_clk = {
+ .name = "pll_clk",
+ .id = -1,
+ .ops = &pll_clk_ops,
+ .parent = &extal_clk,
+ .flags = CLK_ENABLE_ON_INIT,
};
-static struct clk_ops *sh7786_clk_ops[] = {
- &sh7786_master_clk_ops,
- &sh7786_module_clk_ops,
- &sh7786_bus_clk_ops,
- &sh7786_cpu_clk_ops,
+static struct clk *clks[] = {
+ &extal_clk,
+ &pll_clk,
};
-void __init arch_init_clk_ops(struct clk_ops **ops, int idx)
-{
- if (idx < ARRAY_SIZE(sh7786_clk_ops))
- *ops = sh7786_clk_ops[idx];
-}
+static unsigned int div2[] = { 1, 2, 4, 6, 8, 12, 16, 18,
+ 24, 32, 36, 48 };
-static unsigned long shyway_clk_recalc(struct clk *clk)
-{
- int idx = ((ctrl_inl(FRQMR1) >> 20) & 0x0003);
- return clk->parent->rate / sfc_divisors[idx];
-}
-
-static struct clk_ops sh7786_shyway_clk_ops = {
- .recalc = shyway_clk_recalc,
+static struct clk_div_mult_table div4_div_mult_table = {
+ .divisors = div2,
+ .nr_divisors = ARRAY_SIZE(div2),
};
-static struct clk sh7786_shyway_clk = {
- .name = "shyway_clk",
- .flags = CLK_ENABLE_ON_INIT,
- .ops = &sh7786_shyway_clk_ops,
+static struct clk_div4_table div4_table = {
+ .div_mult_table = &div4_div_mult_table,
};
-static unsigned long ddr_clk_recalc(struct clk *clk)
-{
- int idx = ((ctrl_inl(FRQMR1) >> 12) & 0x0003);
- return clk->parent->rate / mfc_divisors[idx];
-}
+enum { DIV4_I, DIV4_SH, DIV4_B, DIV4_DDR, DIV4_DU, DIV4_P, DIV4_NR };
-static struct clk_ops sh7786_ddr_clk_ops = {
- .recalc = ddr_clk_recalc,
-};
+#define DIV4(_str, _bit, _mask, _flags) \
+ SH_CLK_DIV4(_str, &pll_clk, FRQMR1, _bit, _mask, _flags)
-static struct clk sh7786_ddr_clk = {
- .name = "ddr_clk",
- .flags = CLK_ENABLE_ON_INIT,
- .ops = &sh7786_ddr_clk_ops,
+struct clk div4_clks[DIV4_NR] = {
+ [DIV4_P] = DIV4("peripheral_clk", 0, 0x0b40, 0),
+ [DIV4_DU] = DIV4("du_clk", 4, 0x0010, 0),
+ [DIV4_DDR] = DIV4("ddr_clk", 12, 0x0002, CLK_ENABLE_ON_INIT),
+ [DIV4_B] = DIV4("bus_clk", 16, 0x0360, CLK_ENABLE_ON_INIT),
+ [DIV4_SH] = DIV4("shyway_clk", 20, 0x0002, CLK_ENABLE_ON_INIT),
+ [DIV4_I] = DIV4("cpu_clk", 28, 0x0006, CLK_ENABLE_ON_INIT),
};
-/*
- * Additional SH7786-specific on-chip clocks that aren't already part of the
- * clock framework
- */
-static struct clk *sh7786_onchip_clocks[] = {
- &sh7786_shyway_clk,
- &sh7786_ddr_clk,
+#define MSTPCR0 0xffc40030
+#define MSTPCR1 0xffc40034
+
+static struct clk mstp_clks[] = {
+ /* MSTPCR0 */
+ SH_CLK_MSTP32("scif_fck", 5, &div4_clks[DIV4_P], MSTPCR0, 29, 0),
+ SH_CLK_MSTP32("scif_fck", 4, &div4_clks[DIV4_P], MSTPCR0, 28, 0),
+ SH_CLK_MSTP32("scif_fck", 3, &div4_clks[DIV4_P], MSTPCR0, 27, 0),
+ SH_CLK_MSTP32("scif_fck", 2, &div4_clks[DIV4_P], MSTPCR0, 26, 0),
+ SH_CLK_MSTP32("scif_fck", 1, &div4_clks[DIV4_P], MSTPCR0, 25, 0),
+ SH_CLK_MSTP32("scif_fck", 0, &div4_clks[DIV4_P], MSTPCR0, 24, 0),
+ SH_CLK_MSTP32("ssi_fck", 3, &div4_clks[DIV4_P], MSTPCR0, 23, 0),
+ SH_CLK_MSTP32("ssi_fck", 2, &div4_clks[DIV4_P], MSTPCR0, 22, 0),
+ SH_CLK_MSTP32("ssi_fck", 1, &div4_clks[DIV4_P], MSTPCR0, 21, 0),
+ SH_CLK_MSTP32("ssi_fck", 0, &div4_clks[DIV4_P], MSTPCR0, 20, 0),
+ SH_CLK_MSTP32("hac_fck", 1, &div4_clks[DIV4_P], MSTPCR0, 17, 0),
+ SH_CLK_MSTP32("hac_fck", 0, &div4_clks[DIV4_P], MSTPCR0, 16, 0),
+ SH_CLK_MSTP32("i2c_fck", 1, &div4_clks[DIV4_P], MSTPCR0, 15, 0),
+ SH_CLK_MSTP32("i2c_fck", 0, &div4_clks[DIV4_P], MSTPCR0, 14, 0),
+ SH_CLK_MSTP32("tmu9_11_fck", -1, &div4_clks[DIV4_P], MSTPCR0, 11, 0),
+ SH_CLK_MSTP32("tmu678_fck", -1, &div4_clks[DIV4_P], MSTPCR0, 10, 0),
+ SH_CLK_MSTP32("tmu345_fck", -1, &div4_clks[DIV4_P], MSTPCR0, 9, 0),
+ SH_CLK_MSTP32("tmu012_fck", -1, &div4_clks[DIV4_P], MSTPCR0, 8, 0),
+ SH_CLK_MSTP32("sdif_fck", 1, &div4_clks[DIV4_P], MSTPCR0, 5, 0),
+ SH_CLK_MSTP32("sdif_fck", 0, &div4_clks[DIV4_P], MSTPCR0, 4, 0),
+ SH_CLK_MSTP32("hspi_fck", -1, &div4_clks[DIV4_P], MSTPCR0, 2, 0),
+
+ /* MSTPCR1 */
+ SH_CLK_MSTP32("usb_fck", -1, NULL, MSTPCR1, 12, 0),
+ SH_CLK_MSTP32("pcie_fck", 2, NULL, MSTPCR1, 10, 0),
+ SH_CLK_MSTP32("pcie_fck", 1, NULL, MSTPCR1, 9, 0),
+ SH_CLK_MSTP32("pcie_fck", 0, NULL, MSTPCR1, 8, 0),
+ SH_CLK_MSTP32("dmac_11_6_fck", -1, NULL, MSTPCR1, 5, 0),
+ SH_CLK_MSTP32("dmac_5_0_fck", -1, NULL, MSTPCR1, 4, 0),
+ SH_CLK_MSTP32("du_fck", -1, NULL, MSTPCR1, 3, 0),
+ SH_CLK_MSTP32("ether_fck", -1, NULL, MSTPCR1, 2, 0),
};
int __init arch_clk_init(void)
{
- struct clk *clk;
int i, ret = 0;
- cpg_clk_init();
-
- clk = clk_get(NULL, "master_clk");
- for (i = 0; i < ARRAY_SIZE(sh7786_onchip_clocks); i++) {
- struct clk *clkp = sh7786_onchip_clocks[i];
-
- clkp->parent = clk;
- ret |= clk_register(clkp);
- }
+ for (i = 0; i < ARRAY_SIZE(clks); i++)
+ ret |= clk_register(clks[i]);
- clk_put(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, ARRAY_SIZE(mstp_clks));
return ret;
}
git.openpandora.org / pandora-kernel.git / blobdiff