linux-kernel - [RFC/PATCH v2 10/16] soc: bcm: bcm2835-power: Bypass power

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Tue,  9 Feb 2021 13:59:06 +0100
From:   Nicolas Saenz Julienne <nsaenzjulienne@...e.de>
To:     f.fainelli@...il.com, linux-kernel@...r.kernel.org,
        Ray Jui <rjui@...adcom.com>,
        Scott Branden <sbranden@...adcom.com>,
        bcm-kernel-feedback-list@...adcom.com,
        Nicolas Saenz Julienne <nsaenzjulienne@...e.de>
Cc:     linux-rpi-kernel@...ts.infradead.org, phil@...pberrypi.com,
        wahrenst@....net, linux-arm-kernel@...ts.infradead.org,
        mripard@...nel.org, eric@...olt.net
Subject: [RFC/PATCH v2 10/16] soc: bcm: bcm2835-power: Bypass power_on/off() calls

Bypass power_on/power_off() when running on BCM2711 as they are not
needed.

Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@...e.de>
---
 drivers/soc/bcm/bcm2835-power.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/soc/bcm/bcm2835-power.c b/drivers/soc/bcm/bcm2835-power.c
index 42e105758b47..e9c425419174 100644
--- a/drivers/soc/bcm/bcm2835-power.c
+++ b/drivers/soc/bcm/bcm2835-power.c
@@ -197,6 +197,10 @@ static int bcm2835_power_power_off(struct bcm2835_power_domain *pd, u32 pm_reg)
 {
 	struct bcm2835_power *power = pd->power;
 
+	/* We don't run this on BCM2711 */
+	if (power->argon_asb)
+		return 0;
+
 	/* Enable functional isolation */
 	PM_WRITE(pm_reg, PM_READ(pm_reg) & ~PM_ISFUNC);
 
@@ -218,6 +222,10 @@ static int bcm2835_power_power_on(struct bcm2835_power_domain *pd, u32 pm_reg)
 	int inrush;
 	bool powok;
 
+	/* We don't run this on BCM2711 */
+	if (power->argon_asb)
+		return 0;
+
 	/* If it was already powered on by the fw, leave it that way. */
 	if (PM_READ(pm_reg) & PM_POWUP)
 		return 0;
-- 
2.30.0