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authorClaudiu Beznea <claudiu.beznea@microchip.com>2019-02-21 16:45:48 +0300
committerSebastian Reichel <sebastian.reichel@collabora.com>2019-04-05 18:50:45 +0300
commit5c6c513ddbc702b11ceef1e881d95a061f6b854f (patch)
treee45ef56016b9cfa7e440708194ec46a1d386cd8c /drivers/power
parentce8873c77c840977722deb73d7649653a4fcf31a (diff)
downloadlinux-5c6c513ddbc702b11ceef1e881d95a061f6b854f.tar.xz
power: reset: at91-poweroff: add RTT wakeup capability
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>
Diffstat (limited to 'drivers/power')
-rw-r--r--drivers/power/reset/at91-sama5d2_shdwc.c14
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/power/reset/at91-sama5d2_shdwc.c b/drivers/power/reset/at91-sama5d2_shdwc.c
index 2b686c55b717..0747e0cdf350 100644
--- a/drivers/power/reset/at91-sama5d2_shdwc.c
+++ b/drivers/power/reset/at91-sama5d2_shdwc.c
@@ -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[] = {