[SRU][J:linux-bluefield][PATCH v1 1/1] UBUNTU: SAUCE: pwr-mlxbf: support graceful reboot instead of soft reset
Asmaa Mnebhi
asmaa at nvidia.com
Mon Oct 30 19:17:38 UTC 2023
BugLink: https://bugs.launchpad.net/bugs/2041995
There is a new feature request to replace the soft reset with a
graceful reboot.
We will use acpi events triggered by the irq in the pwr-mlxbf file
to trigger the graceful reboot.
Signed-off-by: Asmaa Mnebhi <asmaa at nvidia.com>
---
drivers/power/reset/pwr-mlxbf.c | 22 ++++++++++++++++------
1 file changed, 16 insertions(+), 6 deletions(-)
diff --git a/drivers/power/reset/pwr-mlxbf.c b/drivers/power/reset/pwr-mlxbf.c
index 3f587a37294a..181c421ffa48 100644
--- a/drivers/power/reset/pwr-mlxbf.c
+++ b/drivers/power/reset/pwr-mlxbf.c
@@ -19,14 +19,20 @@
#include <linux/devm-helpers.h>
-#define DRV_VERSION "1.1"
+#define DRV_VERSION "1.2"
struct pwr_mlxbf {
- struct work_struct send_work;
+ struct work_struct reboot_work;
+ struct work_struct shutdown_work;
const char *hid;
};
-static void pwr_mlxbf_send_work(struct work_struct *work)
+static void pwr_mlxbf_reboot_work(struct work_struct *work)
+{
+ acpi_bus_generate_netlink_event("button/reboot.*", "Reboot Button", 0x80, 1);
+}
+
+static void pwr_mlxbf_shutdown_work(struct work_struct *work)
{
acpi_bus_generate_netlink_event("button/power.*", "Power Button", 0x80, 1);
}
@@ -38,10 +44,10 @@ static irqreturn_t pwr_mlxbf_irq(int irq, void *ptr)
struct pwr_mlxbf *priv = ptr;
if (!strncmp(priv->hid, rst_pwr_hid, 8))
- emergency_restart();
+ schedule_work(&priv->reboot_work);
if (!strncmp(priv->hid, low_pwr_hid, 8))
- schedule_work(&priv->send_work);
+ schedule_work(&priv->shutdown_work);
return IRQ_HANDLED;
}
@@ -69,7 +75,11 @@ static int pwr_mlxbf_probe(struct platform_device *pdev)
if (irq < 0)
return dev_err_probe(dev, irq, "Error getting %s irq.\n", priv->hid);
- err = devm_work_autocancel(dev, &priv->send_work, pwr_mlxbf_send_work);
+ err = devm_work_autocancel(dev, &priv->shutdown_work, pwr_mlxbf_shutdown_work);
+ if (err)
+ return err;
+
+ err = devm_work_autocancel(dev, &priv->reboot_work, pwr_mlxbf_reboot_work);
if (err)
return err;
--
2.30.1
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