1 /* 2 * Copyright (C) 2012 Freescale Semiconductor, Inc. All Rights Reserved. 3 * 4 * The code contained herein is licensed under the GNU General Public 5 * License. You may obtain a copy of the GNU General Public License 6 * Version 2 or later at the following locations: 7 * 8 * http://www.opensource.org/licenses/gpl-license.html 9 * http://www.gnu.org/copyleft/gpl.html 10 */ 11 #include <linux/io.h> 12 13 #include "common.h" 14 #include "crmregs-imx3.h" 15 #include "devices/devices-common.h" 16 #include "hardware.h" 17 18 /* 19 * Set cpu low power mode before WFI instruction. This function is called 20 * mx3 because it can be used for mx31 and mx35. 21 * Currently only WAIT_MODE is supported. 22 */ mx3_cpu_lp_set(enum mx3_cpu_pwr_mode mode)23void mx3_cpu_lp_set(enum mx3_cpu_pwr_mode mode) 24 { 25 int reg = __raw_readl(mx3_ccm_base + MXC_CCM_CCMR); 26 reg &= ~MXC_CCM_CCMR_LPM_MASK; 27 28 switch (mode) { 29 case MX3_WAIT: 30 if (cpu_is_mx35()) 31 reg |= MXC_CCM_CCMR_LPM_WAIT_MX35; 32 __raw_writel(reg, mx3_ccm_base + MXC_CCM_CCMR); 33 break; 34 default: 35 pr_err("Unknown cpu power mode: %d\n", mode); 36 return; 37 } 38 } 39