| /* |
| * 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 |
| */ |
| static 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; |
| } |
| |
| static 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; |
| } |
| |
| static 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; |
| } |
| |
| static 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; |
| } |
| |
| static 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; |
| } |
| |
| static unsigned pc_clk_get_rate(unsigned id) |
| { |
| if (msm_proc_comm(PCOM_CLKCTL_RPC_RATE, &id, NULL)) |
| return 0; |
| else |
| return id; |
| } |
| |
| static unsigned pc_clk_is_enabled(unsigned id) |
| { |
| if (msm_proc_comm(PCOM_CLKCTL_RPC_ENABLED, &id, NULL)) |
| return 0; |
| else |
| return id; |
| } |
| |
| static 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, |
| .get_rate = pc_clk_get_rate, |
| .is_enabled = pc_clk_is_enabled, |
| .round_rate = pc_clk_round_rate, |
| .is_local = pc_clk_is_local, |
| }; |