diff options
| -rw-r--r-- | arch/sh/kernel/cpu/sh3/Makefile | 1 | ||||
| -rw-r--r-- | arch/sh/kernel/cpu/sh3/clock-sh7712.c | 71 | ||||
| -rw-r--r-- | include/asm-sh/cpu-sh3/freq.h | 5 |
3 files changed, 77 insertions, 0 deletions
diff --git a/arch/sh/kernel/cpu/sh3/Makefile b/arch/sh/kernel/cpu/sh3/Makefile index 1afd05e62d1..3ae4d9111f1 100644 --- a/arch/sh/kernel/cpu/sh3/Makefile +++ b/arch/sh/kernel/cpu/sh3/Makefile @@ -22,5 +22,6 @@ clock-$(CONFIG_CPU_SUBTYPE_SH7706) := clock-sh7706.o clock-$(CONFIG_CPU_SUBTYPE_SH7709) := clock-sh7709.o clock-$(CONFIG_CPU_SUBTYPE_SH7710) := clock-sh7710.o clock-$(CONFIG_CPU_SUBTYPE_SH7720) := clock-sh7710.o +clock-$(CONFIG_CPU_SUBTYPE_SH7712) := clock-sh7712.o obj-y += $(clock-y) diff --git a/arch/sh/kernel/cpu/sh3/clock-sh7712.c b/arch/sh/kernel/cpu/sh3/clock-sh7712.c new file mode 100644 index 00000000000..54f54df51ef --- /dev/null +++ b/arch/sh/kernel/cpu/sh3/clock-sh7712.c @@ -0,0 +1,71 @@ +/* + * arch/sh/kernel/cpu/sh3/clock-sh7712.c + * + * SH7712 support for the clock framework + * + * Copyright (C) 2007 Andrew Murray <amurray@mpc-data.co.uk> + * + * Based on arch/sh/kernel/cpu/sh3/clock-sh3.c + * Copyright (C) 2005 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 <asm/clock.h> +#include <asm/freq.h> +#include <asm/io.h> + +static int multipliers[] = { 1, 2, 3 }; +static int divisors[] = { 1, 2, 3, 4, 6 }; + +static void master_clk_init(struct clk *clk) +{ + int frqcr = ctrl_inw(FRQCR); + int idx = (frqcr & 0x0300) >> 8; + + clk->rate *= multipliers[idx]; +} + +static struct clk_ops sh7712_master_clk_ops = { + .init = master_clk_init, +}; + +static void module_clk_recalc(struct clk *clk) +{ + int frqcr = ctrl_inw(FRQCR); + int idx = frqcr & 0x0007; + + clk->rate = clk->parent->rate / divisors[idx]; +} + +static struct clk_ops sh7712_module_clk_ops = { + .recalc = module_clk_recalc, +}; + +static void cpu_clk_recalc(struct clk *clk) +{ + int frqcr = ctrl_inw(FRQCR); + int idx = (frqcr & 0x0030) >> 4; + + clk->rate = clk->parent->rate / divisors[idx]; +} + +static struct clk_ops sh7712_cpu_clk_ops = { + .recalc = cpu_clk_recalc, +}; + +static struct clk_ops *sh7712_clk_ops[] = { + &sh7712_master_clk_ops, + &sh7712_module_clk_ops, + &sh7712_cpu_clk_ops, +}; + +void __init arch_init_clk_ops(struct clk_ops **ops, int idx) +{ + if (idx < ARRAY_SIZE(sh7712_clk_ops)) + *ops = sh7712_clk_ops[idx]; +} + diff --git a/include/asm-sh/cpu-sh3/freq.h b/include/asm-sh/cpu-sh3/freq.h index 0a054b53b9d..53c62302b2e 100644 --- a/include/asm-sh/cpu-sh3/freq.h +++ b/include/asm-sh/cpu-sh3/freq.h @@ -10,7 +10,12 @@ #ifndef __ASM_CPU_SH3_FREQ_H #define __ASM_CPU_SH3_FREQ_H +#ifdef CONFIG_CPU_SUBTYPE_SH7712 +#define FRQCR 0xA415FF80 +#else #define FRQCR 0xffffff80 +#endif + #define MIN_DIVISOR_NR 0 #define MAX_DIVISOR_NR 4 |