/* * OMAP4 clockdomain control * * Copyright (C) 2008-2010 Texas Instruments, Inc. * Copyright (C) 2008-2010 Nokia Corporation * * Derived from mach-omap2/clockdomain.c written by Paul Walmsley * Rajendra Nayak <rnayak@ti.com> * * 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 "clockdomain.h" #include "cminst44xx.h" #include "cm44xx.h" static int omap4_clkdm_add_wkup_sleep_dep(struct clockdomain *clkdm1, struct clockdomain *clkdm2) { omap4_cminst_set_inst_reg_bits((1 << clkdm2->dep_bit), clkdm1->prcm_partition, clkdm1->cm_inst, clkdm1->clkdm_offs + OMAP4_CM_STATICDEP); return 0; } static int omap4_clkdm_del_wkup_sleep_dep(struct clockdomain *clkdm1, struct clockdomain *clkdm2) { omap4_cminst_clear_inst_reg_bits((1 << clkdm2->dep_bit), clkdm1->prcm_partition, clkdm1->cm_inst, clkdm1->clkdm_offs + OMAP4_CM_STATICDEP); return 0; } static int omap4_clkdm_read_wkup_sleep_dep(struct clockdomain *clkdm1, struct clockdomain *clkdm2) { return omap4_cminst_read_inst_reg_bits(clkdm1->prcm_partition, clkdm1->cm_inst, clkdm1->clkdm_offs + OMAP4_CM_STATICDEP, (1 << clkdm2->dep_bit)); } static int omap4_clkdm_clear_all_wkup_sleep_deps(struct clockdomain *clkdm) { struct clkdm_dep *cd; u32 mask = 0; for (cd = clkdm->wkdep_srcs; cd && cd->clkdm_name; cd++) { if (!cd->clkdm) continue; /* only happens if data is erroneous */ mask |= 1 << cd->clkdm->dep_bit; atomic_set(&cd->wkdep_usecount, 0); } omap4_cminst_clear_inst_reg_bits(mask, clkdm->prcm_partition, clkdm->cm_inst, clkdm->clkdm_offs + OMAP4_CM_STATICDEP); return 0; } static int omap4_clkdm_sleep(struct clockdomain *clkdm) { omap4_cminst_clkdm_force_sleep(clkdm->prcm_partition, clkdm->cm_inst, clkdm->clkdm_offs); return 0; } static int omap4_clkdm_wakeup(struct clockdomain *clkdm) { omap4_cminst_clkdm_force_wakeup(clkdm->prcm_partition, clkdm->cm_inst, clkdm->clkdm_offs); return 0; } static void omap4_clkdm_allow_idle(struct clockdomain *clkdm) { omap4_cminst_clkdm_enable_hwsup(clkdm->prcm_partition, clkdm->cm_inst, clkdm->clkdm_offs); } static void omap4_clkdm_deny_idle(struct clockdomain *clkdm) { omap4_cminst_clkdm_disable_hwsup(clkdm->prcm_partition, clkdm->cm_inst, clkdm->clkdm_offs); } static int omap4_clkdm_clk_enable(struct clockdomain *clkdm) { if (clkdm->flags & CLKDM_CAN_FORCE_WAKEUP) return omap4_clkdm_wakeup(clkdm); return 0; } static int omap4_clkdm_clk_disable(struct clockdomain *clkdm) { bool hwsup = false; hwsup = omap4_cminst_is_clkdm_in_hwsup(clkdm->prcm_partition, clkdm->cm_inst, clkdm->clkdm_offs); if (!hwsup && (clkdm->flags & CLKDM_CAN_FORCE_SLEEP)) omap4_clkdm_sleep(clkdm); return 0; } struct clkdm_ops omap4_clkdm_operations = { .clkdm_add_wkdep = omap4_clkdm_add_wkup_sleep_dep, .clkdm_del_wkdep = omap4_clkdm_del_wkup_sleep_dep, .clkdm_read_wkdep = omap4_clkdm_read_wkup_sleep_dep, .clkdm_clear_all_wkdeps = omap4_clkdm_clear_all_wkup_sleep_deps, .clkdm_add_sleepdep = omap4_clkdm_add_wkup_sleep_dep, .clkdm_del_sleepdep = omap4_clkdm_del_wkup_sleep_dep, .clkdm_read_sleepdep = omap4_clkdm_read_wkup_sleep_dep, .clkdm_clear_all_sleepdeps = omap4_clkdm_clear_all_wkup_sleep_deps, .clkdm_sleep = omap4_clkdm_sleep, .clkdm_wakeup = omap4_clkdm_wakeup, .clkdm_allow_idle = omap4_clkdm_allow_idle, .clkdm_deny_idle = omap4_clkdm_deny_idle, .clkdm_clk_enable = omap4_clkdm_clk_enable, .clkdm_clk_disable = omap4_clkdm_clk_disable, };