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From: Dario Binacchi <dario.binacchi@amarulasolutions.com>
To: linux-kernel@vger.kernel.org
Cc: linux-amarula@amarulasolutions.com,
	"Dario Binacchi" <dario.binacchi@amarulasolutions.com>,
	"Fabio Estevam" <festevam@gmail.com>,
	"Heiko Stuebner" <heiko@sntech.de>, "Peng Fan" <peng.fan@nxp.com>,
	"Pengutronix Kernel Team" <kernel@pengutronix.de>,
	"Rafael J. Wysocki" <rafael@kernel.org>,
	"Sascha Hauer" <s.hauer@pengutronix.de>,
	"Shawn Guo" <shawnguo@kernel.org>,
	"Ulf Hansson" <ulf.hansson@linaro.org>,
	"Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>,
	imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org,
	linux-pm@vger.kernel.org
Subject: [PATCH v2 2/3] pmdomain: imx93-pd: don't unprepare clocks on driver remove
Date: Sun, 25 Aug 2024 16:34:01 +0200	[thread overview]
Message-ID: <20240825143428.556439-2-dario.binacchi@amarulasolutions.com> (raw)
In-Reply-To: <20240825143428.556439-1-dario.binacchi@amarulasolutions.com>

The removed code was added to handle the case where the power domain is
already on during the driver's probing. In this use case, the "is_off"
parameter is passed as false to pm_genpd_init() to inform it not to call
the power_on() callback, as it's unnecessary to perform the hardware
power-on procedure since the power domain is already on. Therefore, with
the call to clk_bulk_prepare_enable() by probe(), the system is in the
same operational state as when "is_off" is passed as true after the
power_on() callback execution:

 probe() -> is_off == true  -> clk_bulk_prepare_enable() called by power_on()
 probe() -> is_off == false -> clk_bulk_prepare_enable() called by probe()

Reaching the same logical and operational state, it follows that upon
driver removal, there is no need to perform different actions depending
on the power domain's on/off state during probing.

Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
---

(no changes since v1)

 drivers/pmdomain/imx/imx93-pd.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/drivers/pmdomain/imx/imx93-pd.c b/drivers/pmdomain/imx/imx93-pd.c
index 44daecbe5cc3..fb53a8e359bc 100644
--- a/drivers/pmdomain/imx/imx93-pd.c
+++ b/drivers/pmdomain/imx/imx93-pd.c
@@ -90,9 +90,6 @@ static void imx93_pd_remove(struct platform_device *pdev)
 	struct device *dev = &pdev->dev;
 	struct device_node *np = dev->of_node;
 
-	if (!domain->init_off)
-		clk_bulk_disable_unprepare(domain->num_clks, domain->clks);
-
 	of_genpd_del_provider(np);
 	pm_genpd_remove(&domain->genpd);
 }
-- 
2.43.0


  reply	other threads:[~2024-08-25 14:34 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-08-25 14:34 [PATCH v2 1/3] pmdomain: imx93-pd: replace dev_err() with dev_err_probe() Dario Binacchi
2024-08-25 14:34 ` Dario Binacchi [this message]
2024-09-13 12:01   ` [PATCH v2 2/3] pmdomain: imx93-pd: don't unprepare clocks on driver remove Ulf Hansson
2024-08-25 14:34 ` [PATCH v2 3/3] pmdomain: imx93-pd: drop the context variable "init_off" Dario Binacchi
2024-09-13 12:01   ` Ulf Hansson
2024-09-03 16:26 ` [PATCH v2 1/3] pmdomain: imx93-pd: replace dev_err() with dev_err_probe() Uwe Kleine-König
2024-09-13 12:01 ` Ulf Hansson

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