diff options
Diffstat (limited to 'arch/sh/kernel/cpu/sh4a/clock-shx3.c')
| -rw-r--r-- | arch/sh/kernel/cpu/sh4a/clock-shx3.c | 151 |
1 files changed, 151 insertions, 0 deletions
diff --git a/arch/sh/kernel/cpu/sh4a/clock-shx3.c b/arch/sh/kernel/cpu/sh4a/clock-shx3.c new file mode 100644 index 000000000..b1bdbc3cb --- /dev/null +++ b/arch/sh/kernel/cpu/sh4a/clock-shx3.c @@ -0,0 +1,151 @@ +/* + * 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("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("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]); + + 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; +} |