/* * 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 "clock.h" #include "cm2xxx.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_hw_omap *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_hw_omap *clk) { if (!clk || !clk->dpll_data) return; omap2xxx_cm_set_dpll_disable_autoidle(); } /* Public data */ const struct clk_hw_omap_ops clkhwops_omap2xxx_dpll = { .allow_idle = _allow_idle, .deny_idle = _deny_idle, };