diff options
Diffstat (limited to 'arch/mips/ar7/clock.c')
-rw-r--r-- | arch/mips/ar7/clock.c | 113 |
1 files changed, 29 insertions, 84 deletions
diff --git a/arch/mips/ar7/clock.c b/arch/mips/ar7/clock.c index 95def949c971..c717acbc5506 100644 --- a/arch/mips/ar7/clock.c +++ b/arch/mips/ar7/clock.c @@ -13,7 +13,9 @@ #include <linux/gcd.h> #include <linux/io.h> #include <linux/err.h> +#include <linux/clkdev.h> #include <linux/clk.h> +#include <linux/clk-provider.h> #include <asm/addrspace.h> #include <asm/mach-ar7/ar7.h> @@ -84,17 +86,17 @@ struct tnetd7200_clocks { struct tnetd7200_clock usb; }; -static struct clk bus_clk = { +struct clk_rate { + u32 rate; +}; +static struct clk_rate bus_clk = { .rate = 125000000, }; -static struct clk cpu_clk = { +static struct clk_rate cpu_clk = { .rate = 150000000, }; -static struct clk dsp_clk; -static struct clk vbus_clk; - static void approximate(int base, int target, int *prediv, int *postdiv, int *mul) { @@ -240,6 +242,8 @@ static void __init tnetd7300_init_clocks(void) struct tnetd7300_clocks *clocks = ioremap(UR8_REGS_CLOCKS, sizeof(struct tnetd7300_clocks)); + u32 dsp_clk; + struct clk *clk; bus_clk.rate = tnetd7300_get_clock(BUS_PLL_SOURCE_SHIFT, &clocks->bus, bootcr, AR7_AFE_CLOCK); @@ -250,12 +254,18 @@ static void __init tnetd7300_init_clocks(void) else cpu_clk.rate = bus_clk.rate; - if (dsp_clk.rate == 250000000) + dsp_clk = tnetd7300_dsp_clock(); + if (dsp_clk == 250000000) tnetd7300_set_clock(DSP_PLL_SOURCE_SHIFT, &clocks->dsp, - bootcr, dsp_clk.rate); + bootcr, dsp_clk); iounmap(clocks); iounmap(bootcr); + + clk = clk_register_fixed_rate(NULL, "cpu", NULL, 0, cpu_clk.rate); + clkdev_create(clk, "cpu", NULL); + clk = clk_register_fixed_rate(NULL, "dsp", NULL, 0, dsp_clk); + clkdev_create(clk, "dsp", NULL); } static void tnetd7200_set_clock(int base, struct tnetd7200_clock *clock, @@ -327,6 +337,7 @@ static void __init tnetd7200_init_clocks(void) int cpu_base, cpu_mul, cpu_prediv, cpu_postdiv; int dsp_base, dsp_mul, dsp_prediv, dsp_postdiv; int usb_base, usb_mul, usb_prediv, usb_postdiv; + struct clk *clk; cpu_base = tnetd7200_get_clock_base(TNETD7200_CLOCK_ID_CPU, bootcr); dsp_base = tnetd7200_get_clock_base(TNETD7200_CLOCK_ID_DSP, bootcr); @@ -395,100 +406,34 @@ static void __init tnetd7200_init_clocks(void) usb_prediv, usb_postdiv, -1, usb_mul, TNETD7200_DEF_USB_CLK); - dsp_clk.rate = cpu_clk.rate; - iounmap(clocks); iounmap(bootcr); -} - -/* - * Linux clock API - */ -int clk_enable(struct clk *clk) -{ - return 0; -} -EXPORT_SYMBOL(clk_enable); - -void clk_disable(struct clk *clk) -{ -} -EXPORT_SYMBOL(clk_disable); - -unsigned long clk_get_rate(struct clk *clk) -{ - if (!clk) - return 0; - return clk->rate; -} -EXPORT_SYMBOL(clk_get_rate); - -struct clk *clk_get(struct device *dev, const char *id) -{ - if (!strcmp(id, "bus")) - return &bus_clk; - /* cpmac and vbus share the same rate */ - if (!strcmp(id, "cpmac")) - return &vbus_clk; - if (!strcmp(id, "cpu")) - return &cpu_clk; - if (!strcmp(id, "dsp")) - return &dsp_clk; - if (!strcmp(id, "vbus")) - return &vbus_clk; - return ERR_PTR(-ENOENT); + clk = clk_register_fixed_rate(NULL, "cpu", NULL, 0, cpu_clk.rate); + clkdev_create(clk, "cpu", NULL); + clkdev_create(clk, "dsp", NULL); } -EXPORT_SYMBOL(clk_get); - -void clk_put(struct clk *clk) -{ -} -EXPORT_SYMBOL(clk_put); void __init ar7_init_clocks(void) { + struct clk *clk; + switch (ar7_chip_id()) { case AR7_CHIP_7100: case AR7_CHIP_7200: tnetd7200_init_clocks(); break; case AR7_CHIP_7300: - dsp_clk.rate = tnetd7300_dsp_clock(); tnetd7300_init_clocks(); break; default: break; } + clk = clk_register_fixed_rate(NULL, "bus", NULL, 0, bus_clk.rate); + clkdev_create(clk, "bus", NULL); /* adjust vbus clock rate */ - vbus_clk.rate = bus_clk.rate / 2; -} - -/* dummy functions, should not be called */ -long clk_round_rate(struct clk *clk, unsigned long rate) -{ - WARN_ON(clk); - return 0; -} -EXPORT_SYMBOL(clk_round_rate); - -int clk_set_rate(struct clk *clk, unsigned long rate) -{ - WARN_ON(clk); - return 0; -} -EXPORT_SYMBOL(clk_set_rate); - -int clk_set_parent(struct clk *clk, struct clk *parent) -{ - WARN_ON(clk); - return 0; -} -EXPORT_SYMBOL(clk_set_parent); - -struct clk *clk_get_parent(struct clk *clk) -{ - WARN_ON(clk); - return NULL; + clk = clk_register_fixed_factor(NULL, "vbus", "bus", 0, 1, 2); + clkdev_create(clk, "vbus", NULL); + clkdev_create(clk, "cpmac", "cpmac.1"); + clkdev_create(clk, "cpmac", "cpmac.1"); } -EXPORT_SYMBOL(clk_get_parent); |