diff options
Diffstat (limited to 'arch/arm/mach-omap2')
| -rw-r--r-- | arch/arm/mach-omap2/Makefile | 3 | ||||
| -rw-r--r-- | arch/arm/mach-omap2/clkt2xxx_dpll.c | 63 | ||||
| -rw-r--r-- | arch/arm/mach-omap2/clock.h | 1 | ||||
| -rw-r--r-- | arch/arm/mach-omap2/clock2420_data.c | 2 | ||||
| -rw-r--r-- | arch/arm/mach-omap2/clock2430_data.c | 2 | ||||
| -rw-r--r-- | arch/arm/mach-omap2/cm2xxx_3xxx.c | 27 | ||||
| -rw-r--r-- | arch/arm/mach-omap2/cm2xxx_3xxx.h | 3 | ||||
| -rw-r--r-- | arch/arm/mach-omap2/pm24xx.c | 12 |
8 files changed, 105 insertions, 8 deletions
diff --git a/arch/arm/mach-omap2/Makefile b/arch/arm/mach-omap2/Makefile index 89274a9f0357..ae44645551c2 100644 --- a/arch/arm/mach-omap2/Makefile +++ b/arch/arm/mach-omap2/Makefile @@ -115,7 +115,8 @@ obj-$(CONFIG_ARCH_OMAP2) += $(clock-common) clock2xxx.o \ clkt2xxx_sys.o \ clkt2xxx_dpllcore.o \ clkt2xxx_virt_prcm_set.o \ - clkt2xxx_apll.o clkt2xxx_osc.o + clkt2xxx_apll.o clkt2xxx_osc.o \ + clkt2xxx_dpll.o obj-$(CONFIG_SOC_OMAP2420) += clock2420_data.o obj-$(CONFIG_SOC_OMAP2430) += clock2430.o clock2430_data.o obj-$(CONFIG_ARCH_OMAP3) += $(clock-common) clock3xxx.o \ diff --git a/arch/arm/mach-omap2/clkt2xxx_dpll.c b/arch/arm/mach-omap2/clkt2xxx_dpll.c new file mode 100644 index 000000000000..1502a7bc20bb --- /dev/null +++ b/arch/arm/mach-omap2/clkt2xxx_dpll.c @@ -0,0 +1,63 @@ +/* + * OMAP2-specific DPLL control functions + * + * Copyright (C) 2011 Nokia Corporation + * Paul Walmsley + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/kernel.h> +#include <linux/errno.h> +#include <linux/clk.h> +#include <linux/io.h> + +#include <plat/clock.h> + +#include "clock.h" +#include "cm2xxx_3xxx.h" +#include "cm-regbits-24xx.h" + +/* Private functions */ + +/** + * _allow_idle - enable DPLL autoidle bits + * @clk: struct clk * of the DPLL to operate on + * + * Enable DPLL automatic idle control. The DPLL will enter low-power + * stop when its downstream clocks are gated. No return value. + * REVISIT: DPLL can optionally enter low-power bypass by writing 0x1 + * instead. Add some mechanism to optionally enter this mode. + */ +static void _allow_idle(struct clk *clk) +{ + if (!clk || !clk->dpll_data) + return; + + omap2xxx_cm_set_dpll_auto_low_power_stop(); +} + +/** + * _deny_idle - prevent DPLL from automatically idling + * @clk: struct clk * of the DPLL to operate on + * + * Disable DPLL automatic idle control. No return value. + */ +static void _deny_idle(struct clk *clk) +{ + if (!clk || !clk->dpll_data) + return; + + omap2xxx_cm_set_dpll_disable_autoidle(); +} + + +/* Public data */ + +const struct clkops clkops_omap2xxx_dpll_ops = { + .allow_idle = _allow_idle, + .deny_idle = _deny_idle, +}; + diff --git a/arch/arm/mach-omap2/clock.h b/arch/arm/mach-omap2/clock.h index 0725a6ad8b46..9972d892a4af 100644 --- a/arch/arm/mach-omap2/clock.h +++ b/arch/arm/mach-omap2/clock.h @@ -148,6 +148,7 @@ extern void omap2_clk_exit_cpufreq_table(struct cpufreq_frequency_table **table) #define omap2_clk_exit_cpufreq_table 0 #endif +extern const struct clkops clkops_omap2xxx_dpll_ops; extern const struct clkops clkops_omap3_noncore_dpll_ops; extern const struct clkops clkops_omap3_core_dpll_ops; extern const struct clkops clkops_omap4_dpllmx_ops; diff --git a/arch/arm/mach-omap2/clock2420_data.c b/arch/arm/mach-omap2/clock2420_data.c index ee73e14ac3c8..30fbcbd0ed81 100644 --- a/arch/arm/mach-omap2/clock2420_data.c +++ b/arch/arm/mach-omap2/clock2420_data.c @@ -125,7 +125,7 @@ static struct dpll_data dpll_dd = { */ static struct clk dpll_ck = { .name = "dpll_ck", - .ops = &clkops_null, + .ops = &clkops_omap2xxx_dpll_ops, .parent = &sys_ck, /* Can be func_32k also */ .dpll_data = &dpll_dd, .clkdm_name = "wkup_clkdm", diff --git a/arch/arm/mach-omap2/clock2430_data.c b/arch/arm/mach-omap2/clock2430_data.c index a1298e55d915..1ff150a0f304 100644 --- a/arch/arm/mach-omap2/clock2430_data.c +++ b/arch/arm/mach-omap2/clock2430_data.c @@ -125,7 +125,7 @@ static struct dpll_data dpll_dd = { */ static struct clk dpll_ck = { .name = "dpll_ck", - .ops = &clkops_null, + .ops = &clkops_omap2xxx_dpll_ops, .parent = &sys_ck, /* Can be func_32k also */ .dpll_data = &dpll_dd, .clkdm_name = "wkup_clkdm", diff --git a/arch/arm/mach-omap2/cm2xxx_3xxx.c b/arch/arm/mach-omap2/cm2xxx_3xxx.c index 96954aa48671..6b0c7c85ef53 100644 --- a/arch/arm/mach-omap2/cm2xxx_3xxx.c +++ b/arch/arm/mach-omap2/cm2xxx_3xxx.c @@ -25,6 +25,10 @@ #include "cm-regbits-24xx.h" #include "cm-regbits-34xx.h" +/* CM_AUTOIDLE_PLL.AUTO_* bit values */ +#define DPLL_AUTOIDLE_DISABLE 0x0 +#define OMAP2XXX_DPLL_AUTOIDLE_LOW_POWER_STOP 0x3 + static const u8 cm_idlest_offs[] = { CM_IDLEST1, CM_IDLEST2, OMAP2430_CM_IDLEST3 }; @@ -125,6 +129,29 @@ void omap3xxx_cm_clkdm_force_wakeup(s16 module, u32 mask) _write_clktrctrl(OMAP34XX_CLKSTCTRL_FORCE_WAKEUP, module, mask); } +/* + * DPLL autoidle control + */ + +static void _omap2xxx_set_dpll_autoidle(u8 m) +{ + u32 v; + + v = omap2_cm_read_mod_reg(PLL_MOD, CM_AUTOIDLE); + v &= ~OMAP24XX_AUTO_DPLL_MASK; + v |= m << OMAP24XX_AUTO_DPLL_SHIFT; + omap2_cm_write_mod_reg(v, PLL_MOD, CM_AUTOIDLE); +} + +void omap2xxx_cm_set_dpll_disable_autoidle(void) +{ + _omap2xxx_set_dpll_autoidle(OMAP2XXX_DPLL_AUTOIDLE_LOW_POWER_STOP); +} + +void omap2xxx_cm_set_dpll_auto_low_power_stop(void) +{ + _omap2xxx_set_dpll_autoidle(DPLL_AUTOIDLE_DISABLE); +} /* * diff --git a/arch/arm/mach-omap2/cm2xxx_3xxx.h b/arch/arm/mach-omap2/cm2xxx_3xxx.h index 5e9ea5bd60b9..5f4df1ceafad 100644 --- a/arch/arm/mach-omap2/cm2xxx_3xxx.h +++ b/arch/arm/mach-omap2/cm2xxx_3xxx.h @@ -122,6 +122,9 @@ extern void omap3xxx_cm_clkdm_disable_hwsup(s16 module, u32 mask); extern void omap3xxx_cm_clkdm_force_sleep(s16 module, u32 mask); extern void omap3xxx_cm_clkdm_force_wakeup(s16 module, u32 mask); +extern void omap2xxx_cm_set_dpll_disable_autoidle(void); +extern void omap2xxx_cm_set_dpll_auto_low_power_stop(void); + #endif /* CM register bits shared between 24XX and 3430 */ diff --git a/arch/arm/mach-omap2/pm24xx.c b/arch/arm/mach-omap2/pm24xx.c index e983c8301f55..297bb21061b8 100644 --- a/arch/arm/mach-omap2/pm24xx.c +++ b/arch/arm/mach-omap2/pm24xx.c @@ -378,6 +378,7 @@ static void __init prcm_setup_regs(void) { int i, num_mem_banks; struct powerdomain *pwrdm; + u32 v; /* Enable autoidle */ omap2_prm_write_mod_reg(OMAP24XX_AUTOIDLE_MASK, OCP_MOD, @@ -468,11 +469,12 @@ static void __init prcm_setup_regs(void) omap2_cm_write_mod_reg(OMAP2420_AUTO_DSP_IPI_MASK, OMAP24XX_DSP_MOD, CM_AUTOIDLE); - /* Put DPLL and both APLLs into autoidle mode */ - omap2_cm_write_mod_reg((0x03 << OMAP24XX_AUTO_DPLL_SHIFT) | - (0x03 << OMAP24XX_AUTO_96M_SHIFT) | - (0x03 << OMAP24XX_AUTO_54M_SHIFT), - PLL_MOD, CM_AUTOIDLE); + /* Put both APLLs into autoidle mode */ + v = omap2_cm_read_mod_reg(PLL_MOD, CM_AUTOIDLE); + v &= ~(OMAP24XX_AUTO_96M_MASK | OMAP24XX_AUTO_54M_SHIFT); + v |= (0x03 << OMAP24XX_AUTO_96M_SHIFT) | + (0x03 << OMAP24XX_AUTO_54M_SHIFT); + omap2_cm_write_mod_reg(v, PLL_MOD, CM_AUTOIDLE); omap2_cm_write_mod_reg(OMAP24XX_AUTO_OMAPCTRL_MASK | OMAP24XX_AUTO_WDT1_MASK | |
