/* * Copyright (C) 2007 Google, Inc. * Copyright (c) 2007-2010, Code Aurora Forum. All rights reserved. * * This software is licensed under the terms of the GNU General Public * License version 2, as published by the Free Software Foundation, and * may be copied, distributed, and modified under those terms. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * */ #include <linux/err.h> #include <linux/ctype.h> #include <linux/stddef.h> #include <mach/clk.h> #include "proc_comm.h" #include "clock.h" #include "clock-pcom.h" /* * glue for the proc_comm interface */ int pc_clk_enable(unsigned id) { int rc = msm_proc_comm(PCOM_CLKCTL_RPC_ENABLE, &id, NULL); if (rc < 0) return rc; else return (int)id < 0 ? -EINVAL : 0; } void pc_clk_disable(unsigned id) { msm_proc_comm(PCOM_CLKCTL_RPC_DISABLE, &id, NULL); } int pc_clk_reset(unsigned id, enum clk_reset_action action) { int rc; if (action == CLK_RESET_ASSERT) rc = msm_proc_comm(PCOM_CLKCTL_RPC_RESET_ASSERT, &id, NULL); else rc = msm_proc_comm(PCOM_CLKCTL_RPC_RESET_DEASSERT, &id, NULL); if (rc < 0) return rc; else return (int)id < 0 ? -EINVAL : 0; } int pc_clk_set_rate(unsigned id, unsigned rate) { /* The rate _might_ be rounded off to the nearest KHz value by the * remote function. So a return value of 0 doesn't necessarily mean * that the exact rate was set successfully. */ int rc = msm_proc_comm(PCOM_CLKCTL_RPC_SET_RATE, &id, &rate); if (rc < 0) return rc; else return (int)id < 0 ? -EINVAL : 0; } int pc_clk_set_min_rate(unsigned id, unsigned rate) { int rc = msm_proc_comm(PCOM_CLKCTL_RPC_MIN_RATE, &id, &rate); if (rc < 0) return rc; else return (int)id < 0 ? -EINVAL : 0; } int pc_clk_set_max_rate(unsigned id, unsigned rate) { int rc = msm_proc_comm(PCOM_CLKCTL_RPC_MAX_RATE, &id, &rate); if (rc < 0) return rc; else return (int)id < 0 ? -EINVAL : 0; } int pc_clk_set_flags(unsigned id, unsigned flags) { int rc = msm_proc_comm(PCOM_CLKCTL_RPC_SET_FLAGS, &id, &flags); if (rc < 0) return rc; else return (int)id < 0 ? -EINVAL : 0; } unsigned pc_clk_get_rate(unsigned id) { if (msm_proc_comm(PCOM_CLKCTL_RPC_RATE, &id, NULL)) return 0; else return id; } unsigned pc_clk_is_enabled(unsigned id) { if (msm_proc_comm(PCOM_CLKCTL_RPC_ENABLED, &id, NULL)) return 0; else return id; } long pc_clk_round_rate(unsigned id, unsigned rate) { /* Not really supported; pc_clk_set_rate() does rounding on it's own. */ return rate; } static bool pc_clk_is_local(unsigned id) { return false; } struct clk_ops clk_ops_pcom = { .enable = pc_clk_enable, .disable = pc_clk_disable, .auto_off = pc_clk_disable, .reset = pc_clk_reset, .set_rate = pc_clk_set_rate, .set_min_rate = pc_clk_set_min_rate, .set_max_rate = pc_clk_set_max_rate, .set_flags = pc_clk_set_flags, .get_rate = pc_clk_get_rate, .is_enabled = pc_clk_is_enabled, .round_rate = pc_clk_round_rate, .is_local = pc_clk_is_local, };