From: Samuel Holland <samuel@sholland.org>
To: Sean Young <sean@mess.org>,
Mauro Carvalho Chehab <mchehab@kernel.org>,
Maxime Ripard <mripard@kernel.org>, Chen-Yu Tsai <wens@csie.org>,
Jernej Skrabec <jernej.skrabec@siol.net>
Cc: linux-media@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-sunxi@googlegroups.com,
Samuel Holland <samuel@sholland.org>
Subject: [PATCH 4/4] media: sunxi-cir: Implement suspend/resume/shutdown callbacks
Date: Tue, 12 Jan 2021 22:51:32 -0600 [thread overview]
Message-ID: <20210113045132.31430-5-samuel@sholland.org> (raw)
In-Reply-To: <20210113045132.31430-1-samuel@sholland.org>
To save power, gate/reset the hardware block while the system is
asleep or powered off.
Signed-off-by: Samuel Holland <samuel@sholland.org>
---
drivers/media/rc/sunxi-cir.c | 21 +++++++++++++++++++++
1 file changed, 21 insertions(+)
diff --git a/drivers/media/rc/sunxi-cir.c b/drivers/media/rc/sunxi-cir.c
index ccb9d6b4225d..a0bdbf6f66c9 100644
--- a/drivers/media/rc/sunxi-cir.c
+++ b/drivers/media/rc/sunxi-cir.c
@@ -234,6 +234,20 @@ static void sunxi_ir_hw_exit(struct device *dev)
reset_control_assert(ir->rst);
}
+static int __maybe_unused sunxi_ir_suspend(struct device *dev)
+{
+ sunxi_ir_hw_exit(dev);
+
+ return 0;
+}
+
+static int __maybe_unused sunxi_ir_resume(struct device *dev)
+{
+ return sunxi_ir_hw_init(dev);
+}
+
+static SIMPLE_DEV_PM_OPS(sunxi_ir_pm_ops, sunxi_ir_suspend, sunxi_ir_resume);
+
static int sunxi_ir_probe(struct platform_device *pdev)
{
int ret = 0;
@@ -362,6 +376,11 @@ static int sunxi_ir_remove(struct platform_device *pdev)
return 0;
}
+static void sunxi_ir_shutdown(struct platform_device *pdev)
+{
+ sunxi_ir_hw_exit(&pdev->dev);
+}
+
static const struct sunxi_ir_quirks sun4i_a10_ir_quirks = {
.has_reset = false,
.fifo_size = 16,
@@ -397,9 +416,11 @@ MODULE_DEVICE_TABLE(of, sunxi_ir_match);
static struct platform_driver sunxi_ir_driver = {
.probe = sunxi_ir_probe,
.remove = sunxi_ir_remove,
+ .shutdown = sunxi_ir_shutdown,
.driver = {
.name = SUNXI_IR_DEV,
.of_match_table = sunxi_ir_match,
+ .pm = &sunxi_ir_pm_ops,
},
};
--
2.26.2
next prev parent reply other threads:[~2021-01-13 4:53 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-13 4:51 [PATCH 0/4] media: sunxi-cir: Cleanup and power management Samuel Holland
2021-01-13 4:51 ` [PATCH 1/4] media: sunxi-cir: Clean up dead register writes Samuel Holland
2021-01-13 14:33 ` Sean Young
2021-01-13 4:51 ` [PATCH 2/4] media: sunxi-cir: Remove unnecessary spinlock Samuel Holland
2021-01-13 4:51 ` [PATCH 3/4] media: sunxi-cir: Factor out hardware initialization Samuel Holland
2021-01-13 14:36 ` Sean Young
2021-01-13 15:00 ` Samuel Holland
2021-01-13 15:09 ` Sean Young
2021-01-13 4:51 ` Samuel Holland [this message]
2021-01-13 8:26 ` [PATCH 0/4] media: sunxi-cir: Cleanup and power management Maxime Ripard
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