From 92618ff8b025419960e2e845983f0f49b0cb57a9 Mon Sep 17 00:00:00 2001 From: Paul Walmsley Date: Fri, 25 Feb 2011 15:39:27 -0700 Subject: OMAP2xxx: clock: add clockfw autoidle support for APLLs OMAP2xxx devices have two on-chip APLLs. These APLLs can automatically enter idle when not in use. Connect the APLL autoidle code to the clock code, so that the clock framework can handle this process. As part of this patch, remove the code in mach-omap2/pm24xx.c that previously handled APLL autoidle control. Signed-off-by: Paul Walmsley Cc: Kevin Hilman Tested-by: Rajendra Nayak Reviewed-by: Kevin Hilman --- arch/arm/mach-omap2/cm2xxx_3xxx.c | 44 ++++++++++++++++++++++++++++++++++++++- 1 file changed, 43 insertions(+), 1 deletion(-) (limited to 'arch/arm/mach-omap2/cm2xxx_3xxx.c') diff --git a/arch/arm/mach-omap2/cm2xxx_3xxx.c b/arch/arm/mach-omap2/cm2xxx_3xxx.c index 6b0c7c85ef53..9d0dec806e92 100644 --- a/arch/arm/mach-omap2/cm2xxx_3xxx.c +++ b/arch/arm/mach-omap2/cm2xxx_3xxx.c @@ -25,10 +25,14 @@ #include "cm-regbits-24xx.h" #include "cm-regbits-34xx.h" -/* CM_AUTOIDLE_PLL.AUTO_* bit values */ +/* CM_AUTOIDLE_PLL.AUTO_* bit values for DPLLs */ #define DPLL_AUTOIDLE_DISABLE 0x0 #define OMAP2XXX_DPLL_AUTOIDLE_LOW_POWER_STOP 0x3 +/* CM_AUTOIDLE_PLL.AUTO_* bit values for APLLs (OMAP2xxx only) */ +#define OMAP2XXX_APLL_AUTOIDLE_DISABLE 0x0 +#define OMAP2XXX_APLL_AUTOIDLE_LOW_POWER_STOP 0x3 + static const u8 cm_idlest_offs[] = { CM_IDLEST1, CM_IDLEST2, OMAP2430_CM_IDLEST3 }; @@ -153,6 +157,44 @@ void omap2xxx_cm_set_dpll_auto_low_power_stop(void) _omap2xxx_set_dpll_autoidle(DPLL_AUTOIDLE_DISABLE); } +/* + * APLL autoidle control + */ + +static void _omap2xxx_set_apll_autoidle(u8 m, u32 mask) +{ + u32 v; + + v = omap2_cm_read_mod_reg(PLL_MOD, CM_AUTOIDLE); + v &= ~mask; + v |= m << __ffs(mask); + omap2_cm_write_mod_reg(v, PLL_MOD, CM_AUTOIDLE); +} + +void omap2xxx_cm_set_apll54_disable_autoidle(void) +{ + _omap2xxx_set_apll_autoidle(OMAP2XXX_APLL_AUTOIDLE_LOW_POWER_STOP, + OMAP24XX_AUTO_54M_MASK); +} + +void omap2xxx_cm_set_apll54_auto_low_power_stop(void) +{ + _omap2xxx_set_apll_autoidle(OMAP2XXX_APLL_AUTOIDLE_DISABLE, + OMAP24XX_AUTO_54M_MASK); +} + +void omap2xxx_cm_set_apll96_disable_autoidle(void) +{ + _omap2xxx_set_apll_autoidle(OMAP2XXX_APLL_AUTOIDLE_LOW_POWER_STOP, + OMAP24XX_AUTO_96M_MASK); +} + +void omap2xxx_cm_set_apll96_auto_low_power_stop(void) +{ + _omap2xxx_set_apll_autoidle(OMAP2XXX_APLL_AUTOIDLE_DISABLE, + OMAP24XX_AUTO_96M_MASK); +} + /* * */ -- cgit v1.2.1