linux-kernel - [PATCH 5.1 118/155] ARM: OMAP2+: pm33xx-core: Do not Turn OFF CEFUSE as PPA may be using it

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Date:   Thu, 13 Jun 2019 10:33:50 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Kabir Sahane <x0153567@...com>,
        "Andrew F. Davis" <afd@...com>, Tony Lindgren <tony@...mide.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.1 118/155] ARM: OMAP2+: pm33xx-core: Do not Turn OFF CEFUSE as PPA may be using it

[ Upstream commit 72aff4ecf1cb85a3c6e6b42ccbda0bc631b090b3 ]

This area is used to store keys by HSPPA in case of AM438x SOC. Leave it
active.

Signed-off-by: Kabir Sahane <x0153567@...com>
Signed-off-by: Andrew F. Davis <afd@...com>
Signed-off-by: Tony Lindgren <tony@...mide.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 arch/arm/mach-omap2/pm33xx-core.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/arch/arm/mach-omap2/pm33xx-core.c b/arch/arm/mach-omap2/pm33xx-core.c
index 724cf5774a6c..c93b6efd565f 100644
--- a/arch/arm/mach-omap2/pm33xx-core.c
+++ b/arch/arm/mach-omap2/pm33xx-core.c
@@ -51,10 +51,12 @@ static int amx3_common_init(void)
 
 	/* CEFUSE domain can be turned off post bootup */
 	cefuse_pwrdm = pwrdm_lookup("cefuse_pwrdm");
-	if (cefuse_pwrdm)
-		omap_set_pwrdm_state(cefuse_pwrdm, PWRDM_POWER_OFF);
-	else
+	if (!cefuse_pwrdm)
 		pr_err("PM: Failed to get cefuse_pwrdm\n");
+	else if (omap_type() != OMAP2_DEVICE_TYPE_GP)
+		pr_info("PM: Leaving EFUSE power domain active\n");
+	else
+		omap_set_pwrdm_state(cefuse_pwrdm, PWRDM_POWER_OFF);
 
 	return 0;
 }
-- 
2.20.1