linux-kernel - [PATCH 1/2] pmdomain: imx8m[p]-blk-ctrl: Suppress bind attrs

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Message-Id: <20241206112731.98244-1-peng.fan@oss.nxp.com>
Date: Fri,  6 Dec 2024 19:27:30 +0800
From: "Peng Fan (OSS)" <peng.fan@....nxp.com>
To: ulf.hansson@...aro.org,
	shawnguo@...nel.org,
	s.hauer@...gutronix.de
Cc: kernel@...gutronix.de,
	festevam@...il.com,
	linux-pm@...r.kernel.org,
	aford173@...il.com,
	imx@...ts.linux.dev,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	Peng Fan <peng.fan@....com>
Subject: [PATCH 1/2] pmdomain: imx8m[p]-blk-ctrl: Suppress bind attrs

From: Peng Fan <peng.fan@....com>

The blk ctrl drivers on imx8m series are registered as platform
devices and this opens the possibility of reloading the driver
at runtime.

But this doesn't actually work. There are some hardware sequence
dependecy between blk ctrl and gpc, also power domains are used
by other peripherals, so fix this by explicitly suppressing bind
attrs.

Signed-off-by: Peng Fan <peng.fan@....com>
---
 drivers/pmdomain/imx/imx8m-blk-ctrl.c  | 1 +
 drivers/pmdomain/imx/imx8mp-blk-ctrl.c | 1 +
 2 files changed, 2 insertions(+)

diff --git a/drivers/pmdomain/imx/imx8m-blk-ctrl.c b/drivers/pmdomain/imx/imx8m-blk-ctrl.c
index 23db85b7aa9e..912802b5215b 100644
--- a/drivers/pmdomain/imx/imx8m-blk-ctrl.c
+++ b/drivers/pmdomain/imx/imx8m-blk-ctrl.c
@@ -894,6 +894,7 @@ static struct platform_driver imx8m_blk_ctrl_driver = {
 		.name = "imx8m-blk-ctrl",
 		.pm = &imx8m_blk_ctrl_pm_ops,
 		.of_match_table = imx8m_blk_ctrl_of_match,
+		.suppress_bind_attrs = true,
 	},
 };
 module_platform_driver(imx8m_blk_ctrl_driver);
diff --git a/drivers/pmdomain/imx/imx8mp-blk-ctrl.c b/drivers/pmdomain/imx/imx8mp-blk-ctrl.c
index e3a0f64c144c..411dd548c67c 100644
--- a/drivers/pmdomain/imx/imx8mp-blk-ctrl.c
+++ b/drivers/pmdomain/imx/imx8mp-blk-ctrl.c
@@ -862,6 +862,7 @@ static struct platform_driver imx8mp_blk_ctrl_driver = {
 		.name = "imx8mp-blk-ctrl",
 		.pm = &imx8mp_blk_ctrl_pm_ops,
 		.of_match_table = imx8mp_blk_ctrl_of_match,
+		.suppress_bind_attrs = true,
 	},
 };
 module_platform_driver(imx8mp_blk_ctrl_driver);
-- 
2.37.1