linux-kernel - [PATCH v4 7/7] net: phy: qt2025: Wait until PHY becomes ready

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Message-ID: <20241025033118.44452-8-fujita.tomonori@gmail.com>
Date: Fri, 25 Oct 2024 12:31:18 +0900
From: FUJITA Tomonori <fujita.tomonori@...il.com>
To: anna-maria@...utronix.de,
	frederic@...nel.org,
	tglx@...utronix.de,
	jstultz@...gle.com,
	sboyd@...nel.org,
	linux-kernel@...r.kernel.org
Cc: netdev@...r.kernel.org,
	rust-for-linux@...r.kernel.org,
	andrew@...n.ch,
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	tmgross@...ch.edu,
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Subject: [PATCH v4 7/7] net: phy: qt2025: Wait until PHY becomes ready

Wait until a PHY becomes ready in the probe callback by
using readx_poll_timeout function.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@...il.com>
---
 drivers/net/phy/qt2025.rs | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/drivers/net/phy/qt2025.rs b/drivers/net/phy/qt2025.rs
index 28d8981f410b..f7480c19d4cc 100644
--- a/drivers/net/phy/qt2025.rs
+++ b/drivers/net/phy/qt2025.rs
@@ -18,7 +18,9 @@
     DeviceId, Driver,
 };
 use kernel::prelude::*;
+use kernel::readx_poll_timeout;
 use kernel::sizes::{SZ_16K, SZ_8K};
+use kernel::time::Delta;
 
 kernel::module_phy_driver! {
     drivers: [PhyQT2025],
@@ -93,7 +95,13 @@ fn probe(dev: &mut phy::Device) -> Result<()> {
         // The micro-controller will start running from SRAM.
         dev.write(C45::new(Mmd::PCS, 0xe854), 0x0040)?;
 
-        // TODO: sleep here until the hw becomes ready.
+        readx_poll_timeout!(
+            || dev.read(C45::new(Mmd::PCS, 0xd7fd)),
+            |val| val != 0x00 && val != 0x10,
+            Delta::from_millis(50),
+            Delta::from_secs(3)
+        )?;
+
         Ok(())
     }
 
-- 
2.43.0