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OMAP2+: clock: autoidle as many clocks as possible if CONFIG_OMAP_RESET_CLOCKS

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Attempt to enable autoidle for as many clocks as possible in the
OMAP2+-common CONFIG_OMAP_RESET_CLOCKS code.  Currently, this only
enables DPLL autoidle for OMAP3/4 DPLLs; but future patches will
enable autoidle for other clocks and the OMAP2 DPLL/APLLs.

In the long run, we should probably get rid of
CONFIG_OMAP_RESET_CLOCKS, and unconditionally run the code that it
selects.  Otherwise, the state of the clock tree won't match the
hardware state - this could result in clocks being enabled or disabled
unpredictably.

Based on a patch by Rajendra Nayak <rnayak@ti.com> that did this in
the pm34xx.c/pm44xx.c code.

Signed-off-by: Paul Walmsley <paul@pwsan.com>
Cc: Rajendra Nayak <rnayak@ti.com>
This commit is contained in:
Paul Walmsley 2011-02-25 15:49:01 -07:00
parent 6c6f5a7437
commit b80b956dc5
2 changed files with 1 additions and 17 deletions
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17
arch/arm/mach-omap2/pm34xx.c
View file

@ -813,23 +813,6 @@ static void __init prcm_setup_regs(void)
omap_ctrl_writel(OMAP3430_AUTOIDLE_MASK, OMAP2_CONTROL_SYSCONFIG);
/*
* Set all plls to autoidle. This is needed until autoidle is
* enabled by clockfw
*/
omap2_cm_write_mod_reg(1 << OMAP3430_AUTO_IVA2_DPLL_SHIFT,
OMAP3430_IVA2_MOD, CM_AUTOIDLE2);
omap2_cm_write_mod_reg(1 << OMAP3430_AUTO_MPU_DPLL_SHIFT,
MPU_MOD,
CM_AUTOIDLE2);
omap2_cm_write_mod_reg((1 << OMAP3430_AUTO_PERIPH_DPLL_SHIFT) |
(1 << OMAP3430_AUTO_CORE_DPLL_SHIFT),
PLL_MOD,
CM_AUTOIDLE);
omap2_cm_write_mod_reg(1 << OMAP3430ES2_AUTO_PERIPH2_DPLL_SHIFT,
PLL_MOD,
CM_AUTOIDLE2);
/*
* Enable control of expternal oscillator through
* sys_clkreq. In the long run clock framework should

1
arch/arm/plat-omap/clock.c
View file

@ -446,6 +446,7 @@ static int __init clk_disable_unused(void)
return 0;
}
late_initcall(clk_disable_unused);
late_initcall(omap_clk_enable_autoidle_all);
#endif
int __init clk_init(struct clk_functions * custom_clocks)