diff mbox series

[19/27] imx: imx8ulp_evk: Power down the domains may used in u-boot

Message ID 20220214124735.25580-20-peng.fan@oss.nxp.com
State Superseded
Delegated to: Stefano Babic
Headers show
Series imx: imx8ulp: misc update from downstream | expand

Commit Message

Peng Fan (OSS) Feb. 14, 2022, 12:47 p.m. UTC 
From: Ye Li <ye.li@nxp.com>

Since ATF power domain will hold the enable counter for each power domain,
We need to power off them before entering kernel to avoid this
power domain can't be really powered off.

Signed-off-by: Ye Li <ye.li@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
---
 board/freescale/imx8ulp_evk/imx8ulp_evk.c | 30 +++++++++++++++++++++++
 1 file changed, 30 insertions(+)
diff mbox series

Patch

diff --git a/board/freescale/imx8ulp_evk/imx8ulp_evk.c b/board/freescale/imx8ulp_evk/imx8ulp_evk.c
index b61a4cfbe8..1bd308148f 100644
--- a/board/freescale/imx8ulp_evk/imx8ulp_evk.c
+++ b/board/freescale/imx8ulp_evk/imx8ulp_evk.c
@@ -13,6 +13,8 @@ 
 #include <miiphy.h>
 #include <netdev.h>
 #include <asm/gpio.h>
+#include <power-domain.h>
+#include <dt-bindings/power/imx8ulp-power.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
@@ -129,3 +131,31 @@  int board_late_init(void)
 {
 	return 0;
 }
+
+void board_quiesce_devices(void)
+{
+	/* Disable the power domains may used in u-boot before entering kernel */
+#if CONFIG_IS_ENABLED(POWER_DOMAIN)
+	struct udevice *scmi_devpd;
+	int ret, i;
+	struct power_domain pd;
+	ulong ids[] = { IMX8ULP_PD_FLEXSPI2, IMX8ULP_PD_USB0, IMX8ULP_PD_USDHC0,
+			IMX8ULP_PD_USDHC1, IMX8ULP_PD_USDHC2_USB1, IMX8ULP_PD_DCNANO,
+			IMX8ULP_PD_MIPI_DSI };
+
+	ret = uclass_get_device(UCLASS_POWER_DOMAIN, 0, &scmi_devpd);
+	if (ret) {
+		printf("Cannot get scmi devpd: err=%d\n", ret);
+		return;
+	}
+
+	pd.dev = scmi_devpd;
+
+	for (i = 0; i < ARRAY_SIZE(ids); i++) {
+		pd.id = ids[i];
+		ret = power_domain_off(&pd);
+		if (ret)
+			printf("power_domain_off %lu failed: err=%d\n", ids[i], ret);
+	}
+#endif
+}