Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-30 16:11:38 +00:00
Code Issues Packages Projects Releases Wiki Activity

power: reset: at91-poweroff: add RTT wakeup capability

Browse Source 
Add RTT wakeup capability.

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
This commit is contained in:
Claudiu Beznea 2019-02-21 13:45:48 +00:00 committed by Sebastian Reichel
parent ce8873c77c
commit 5c6c513ddb
1 changed files with 14 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
drivers/power/reset/at91-sama5d2_shdwc.c
View File

@ -57,15 +57,21 @@
#define SHDW_WK_PIN(reg, cfg) ((reg) & AT91_SHDW_WKUPIS((cfg)->wkup_pin_input))
#define SHDW_RTCWK(reg, cfg) (((reg) >> ((cfg)->sr_rtcwk_shift)) & 0x1)
#define SHDW_RTTWK(reg, cfg) (((reg) >> ((cfg)->sr_rttwk_shift)) & 0x1)
#define SHDW_RTCWKEN(cfg) (1 << ((cfg)->mr_rtcwk_shift))
#define SHDW_RTTWKEN(cfg) (1 << ((cfg)->mr_rttwk_shift))
#define DBC_PERIOD_US(x) DIV_ROUND_UP_ULL((1000000 * (x)), \
SLOW_CLOCK_FREQ)
#define SHDW_CFG_NOT_USED (32)
struct shdwc_config {
u8 wkup_pin_input;
u8 mr_rtcwk_shift;
u8 mr_rttwk_shift;
u8 sr_rtcwk_shift;
u8 sr_rttwk_shift;
};
struct shdwc {
@ -104,6 +110,8 @@ static void __init at91_wakeup_status(struct platform_device *pdev)
reason = "WKUP pin";
else if (SHDW_RTCWK(reg, shdw->cfg))
reason = "RTC";
else if (SHDW_RTTWK(reg, shdw->cfg))
reason = "RTT";
pr_info("AT91: Wake-Up source: %s\n", reason);
}
@ -221,6 +229,9 @@ static void at91_shdwc_dt_configure(struct platform_device *pdev)
if (of_property_read_bool(np, "atmel,wakeup-rtc-timer"))
mode |= SHDW_RTCWKEN(shdw->cfg);
if (of_property_read_bool(np, "atmel,wakeup-rtt-timer"))
mode |= SHDW_RTTWKEN(shdw->cfg);
dev_dbg(&pdev->dev, "%s: mode = %#x\n", __func__, mode);
writel(mode, shdw->shdwc_base + AT91_SHDW_MR);
@ -231,7 +242,10 @@ static void at91_shdwc_dt_configure(struct platform_device *pdev)
static const struct shdwc_config sama5d2_shdwc_config = {
.wkup_pin_input = 0,
.mr_rtcwk_shift = 17,
.mr_rttwk_shift = SHDW_CFG_NOT_USED,
.sr_rtcwk_shift = 5,
.sr_rttwk_shift = SHDW_CFG_NOT_USED,
};
};
static const struct of_device_id at91_shdwc_of_match[] = {