Eric Lee / linux-smarc-t335x-v3.2

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Commit ae298d4a5a55786aee7df53aa8f1a4addad8ab1d

Authored by ShankarMurthy, Akshay
Committed by Vaibhav Hiremath
1 parent 0666fe9e72
Exists in v3.2_SMARCT335xPSP_04.06.00.11 and in 3 other branches v3.2_AM335xPSP_04.06.00.11, v3.2_NEWT335xPSP_04.06.00.11, v3.2_SBC_SMARTMEN

ARM: OMAP: AM33XX: PM: Enable RTC wakeup for standby 

Add support for rtc wakeup from standby by keeping RTC module
enabled during standby.

RTC wakeup is corrected in the PG2.0 and hence it is supported
only on PG2.x boards.

To test RTC wakeup use below command:
 @ rtcwake -d /dev/rtc0 -m standby -s 5

Signed-off-by: Vaibhav Hiremath <hvaibhav@ti.com>

Showing 1 changed file with 18 additions and 1 deletions Side-by-side Diff

arch/arm/mach-omap2/pm33xx.c
Diff comments   View file @ ae298d4
... ... @@ -102,11 +102,12 @@
102 102 {
103 103 int state, ret = 0;
104 104  
105   - struct omap_hwmod *gpmc_oh, *usb_oh, *gpio1_oh;
  105 + struct omap_hwmod *gpmc_oh, *usb_oh, *gpio1_oh, *rtc_oh;
106 106  
107 107 usb_oh = omap_hwmod_lookup("usb_otg_hs");
108 108 gpmc_oh = omap_hwmod_lookup("gpmc");
109 109 gpio1_oh = omap_hwmod_lookup("gpio1"); /* WKUP domain GPIO */
  110 + rtc_oh = omap_hwmod_lookup("rtc");
110 111  
111 112 omap_hwmod_enable(usb_oh);
112 113 omap_hwmod_enable(gpmc_oh);
... ... @@ -123,6 +124,14 @@
123 124 omap_hwmod_idle(gpmc_oh);
124 125  
125 126 /*
  127 + * Keep RTC module enabled during standby
  128 + * for PG2.x to enable wakeup from RTC.
  129 + */
  130 + if ((omap_rev() >= AM335X_REV_ES2_0) &&
  131 + (suspend_state == PM_SUSPEND_STANDBY))
  132 + omap_hwmod_enable(rtc_oh);
  133 +
  134 + /*
126 135 * Disable the GPIO module. This ensure that
127 136 * only sWAKEUP interrupts to Cortex-M3 get generated
128 137 *
... ... @@ -200,6 +209,14 @@
200 209 */
201 210 if (suspend_state == PM_SUSPEND_STANDBY)
202 211 omap_hwmod_idle(usb_oh);
  212 +
  213 + /*
  214 + * Put RTC module to idle on resume from standby
  215 + * for PG2.x.
  216 + */
  217 + if ((omap_rev() >= AM335X_REV_ES2_0) &&
  218 + (suspend_state == PM_SUSPEND_STANDBY))
  219 + omap_hwmod_idle(rtc_oh);
203 220  
204 221 ret = am33xx_verify_lp_state(ret);
205 222