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Commit b80b956d authored by Paul Walmsley's avatar Paul Walmsley
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OMAP2+: clock: autoidle as many clocks as possible if CONFIG_OMAP_RESET_CLOCKS 



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: default avatarPaul Walmsley <paul@pwsan.com>
Cc: Rajendra Nayak <rnayak@ti.com>
parent 6c6f5a74

arch/arm/mach-omap2/pm34xx.c

+0 −17
Original line number Diff line number Diff line
@@ -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

arch/arm/plat-omap/clock.c

+1 −0
Original line number Diff line number Diff line
@@ -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)