| Vaibhav Hiremath | 9c80f3a | 2012-06-18 00:47:27 -0600 | [diff] [blame] | 1 | /* |
| 2 | * AM33XX clockdomain control |
| 3 | * |
| 4 | * Copyright (C) 2011-2012 Texas Instruments Incorporated - http://www.ti.com/ |
| 5 | * Vaibhav Hiremath <hvaibhav@ti.com> |
| 6 | * |
| 7 | * Derived from mach-omap2/clockdomain44xx.c written by Rajendra Nayak |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or |
| 10 | * modify it under the terms of the GNU General Public License as |
| 11 | * published by the Free Software Foundation version 2. |
| 12 | * |
| 13 | * This program is distributed "as is" WITHOUT ANY WARRANTY of any |
| 14 | * kind, whether express or implied; without even the implied warranty |
| 15 | * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | * GNU General Public License for more details. |
| 17 | */ |
| 18 | |
| 19 | #include <linux/kernel.h> |
| 20 | |
| 21 | #include "clockdomain.h" |
| 22 | #include "cm33xx.h" |
| 23 | |
| 24 | |
| 25 | static int am33xx_clkdm_sleep(struct clockdomain *clkdm) |
| 26 | { |
| 27 | am33xx_cm_clkdm_force_sleep(clkdm->cm_inst, clkdm->clkdm_offs); |
| 28 | return 0; |
| 29 | } |
| 30 | |
| 31 | static int am33xx_clkdm_wakeup(struct clockdomain *clkdm) |
| 32 | { |
| 33 | am33xx_cm_clkdm_force_wakeup(clkdm->cm_inst, clkdm->clkdm_offs); |
| 34 | return 0; |
| 35 | } |
| 36 | |
| 37 | static void am33xx_clkdm_allow_idle(struct clockdomain *clkdm) |
| 38 | { |
| 39 | am33xx_cm_clkdm_enable_hwsup(clkdm->cm_inst, clkdm->clkdm_offs); |
| 40 | } |
| 41 | |
| 42 | static void am33xx_clkdm_deny_idle(struct clockdomain *clkdm) |
| 43 | { |
| 44 | am33xx_cm_clkdm_disable_hwsup(clkdm->cm_inst, clkdm->clkdm_offs); |
| 45 | } |
| 46 | |
| 47 | static int am33xx_clkdm_clk_enable(struct clockdomain *clkdm) |
| 48 | { |
| 49 | if (clkdm->flags & CLKDM_CAN_FORCE_WAKEUP) |
| 50 | return am33xx_clkdm_wakeup(clkdm); |
| 51 | |
| 52 | return 0; |
| 53 | } |
| 54 | |
| 55 | static int am33xx_clkdm_clk_disable(struct clockdomain *clkdm) |
| 56 | { |
| 57 | bool hwsup = false; |
| 58 | |
| 59 | hwsup = am33xx_cm_is_clkdm_in_hwsup(clkdm->cm_inst, clkdm->clkdm_offs); |
| 60 | |
| 61 | if (!hwsup && (clkdm->flags & CLKDM_CAN_FORCE_SLEEP)) |
| 62 | am33xx_clkdm_sleep(clkdm); |
| 63 | |
| 64 | return 0; |
| 65 | } |
| 66 | |
| 67 | struct clkdm_ops am33xx_clkdm_operations = { |
| 68 | .clkdm_sleep = am33xx_clkdm_sleep, |
| 69 | .clkdm_wakeup = am33xx_clkdm_wakeup, |
| 70 | .clkdm_allow_idle = am33xx_clkdm_allow_idle, |
| 71 | .clkdm_deny_idle = am33xx_clkdm_deny_idle, |
| 72 | .clkdm_clk_enable = am33xx_clkdm_clk_enable, |
| 73 | .clkdm_clk_disable = am33xx_clkdm_clk_disable, |
| 74 | }; |