linux-kernel - [PATCH v1] drivers: meson: secure-pwrc: always enable DMA domain

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Date:   Sat, 10 Jun 2023 12:04:14 +0300
From:   Alexey Romanov <avromanov@...rdevices.ru>
To:     <narmstrong@...libre.com>, <neil.armstrong@...aro.org>,
        <khilman@...libre.com>, <jbrunet@...libre.com>,
        <martin.blumenstingl@...glemail.com>
CC:     <linux-arm-kernel@...ts.infradead.org>, <kernel@...rdevices.ru>,
        <linux-amlogic@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>,
        "Alexey Romanov" <avromanov@...rdevices.ru>
Subject: [PATCH v1] drivers: meson: secure-pwrc: always enable DMA domain

Starting from commit e45f243409db ("firmware: meson_sm:
populate platform devices from sm device tree data") pwrc
is probed successfully and disables unused pwr domains.
By A1 SoC family design, any TEE requires DMA pwr domain
always enabled.

Signed-off-by: Alexey Romanov <avromanov@...rdevices.ru>
---
I'm not entirely sure if this domain should always be enabled on or it
should be separately enabled in dts file. Comments are welcome.
---
 drivers/soc/amlogic/meson-secure-pwrc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/soc/amlogic/meson-secure-pwrc.c b/drivers/soc/amlogic/meson-secure-pwrc.c
index e93518763526..25b4b71df9b8 100644
--- a/drivers/soc/amlogic/meson-secure-pwrc.c
+++ b/drivers/soc/amlogic/meson-secure-pwrc.c
@@ -105,7 +105,7 @@ static struct meson_secure_pwrc_domain_desc a1_pwrc_domains[] = {
 	SEC_PD(ACODEC,	0),
 	SEC_PD(AUDIO,	0),
 	SEC_PD(OTP,	0),
-	SEC_PD(DMA,	0),
+	SEC_PD(DMA,	GENPD_FLAG_ALWAYS_ON | GENPD_FLAG_IRQ_SAFE),
 	SEC_PD(SD_EMMC,	0),
 	SEC_PD(RAMA,	0),
 	/* SRAMB is used as ATF runtime memory, and should be always on */
-- 
2.30.1