arch/arm/mach-s3c/pm-core-s3c64xx.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Copyright 2008 Openmoko, Inc.
   4  * Copyright 2008 Simtec Electronics
   5  *      Ben Dooks <ben@simtec.co.uk>
   6  *      http://armlinux.simtec.co.uk/
   7  *
   8  * S3C64XX - PM core support for arch/arm/plat-s3c/pm.c
   9  */
  10
  11 #ifndef __MACH_S3C64XX_PM_CORE_H
  12 #define __MACH_S3C64XX_PM_CORE_H __FILE__
  13
  14 #include <linux/serial_s3c.h>
  15 #include <linux/delay.h>
  16
  17 #include "regs-gpio.h"
  18 #include "regs-clock.h"
  19 #include "map.h"
  20
  21 static inline void s3c_pm_debug_init_uart(void)
  22 {
  23 #ifdef CONFIG_SAMSUNG_PM_DEBUG
  24         u32 tmp = __raw_readl(S3C_PCLK_GATE);
  25
  26         /* As a note, since the S3C64XX UARTs generally have multiple
  27          * clock sources, we simply enable PCLK at the moment and hope
  28          * that the resume settings for the UART are suitable for the
  29          * use with PCLK.
  30          */
  31
  32         tmp |= S3C_CLKCON_PCLK_UART0;
  33         tmp |= S3C_CLKCON_PCLK_UART1;
  34         tmp |= S3C_CLKCON_PCLK_UART2;
  35         tmp |= S3C_CLKCON_PCLK_UART3;
  36
  37         __raw_writel(tmp, S3C_PCLK_GATE);
  38         udelay(10);
  39 #endif
  40 }
  41
  42 static inline void s3c_pm_arch_prepare_irqs(void)
  43 {
  44         /* VIC should have already been taken care of */
  45
  46         /* clear any pending EINT0 interrupts */
  47         __raw_writel(__raw_readl(S3C64XX_EINT0PEND), S3C64XX_EINT0PEND);
  48 }
  49
  50 static inline void s3c_pm_arch_stop_clocks(void)
  51 {
  52 }
  53
  54 static inline void s3c_pm_arch_show_resume_irqs(void)
  55 {
  56 }
  57
  58 /* make these defines, we currently do not have any need to change
  59  * the IRQ wake controls depending on the CPU we are running on */
  60 #ifdef CONFIG_PM_SLEEP
  61 #define s3c_irqwake_eintallow   ((1 << 28) - 1)
  62 #define s3c_irqwake_intallow    (~0)
  63 #else
  64 #define s3c_irqwake_eintallow 0
  65 #define s3c_irqwake_intallow  0
  66 #endif
  67
  68 static inline void s3c_pm_restored_gpios(void)
  69 {
  70         /* ensure sleep mode has been cleared from the system */
  71
  72         __raw_writel(0, S3C64XX_SLPEN);
  73 }
  74
  75 static inline void samsung_pm_saved_gpios(void)
  76 {
  77         /* turn on the sleep mode and keep it there, as it seems that during
  78          * suspend the xCON registers get re-set and thus you can end up with
  79          * problems between going to sleep and resuming.
  80          */
  81
  82         __raw_writel(S3C64XX_SLPEN_USE_xSLP, S3C64XX_SLPEN);
  83 }
  84 #endif /* __MACH_S3C64XX_PM_CORE_H */