linux-kernel - [PATCH net-next v2 6/6] net: phy: qt2025: wait until PHY becomes ready

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Message-ID: <20241005122531.20298-7-fujita.tomonori@gmail.com>
Date: Sat,  5 Oct 2024 21:25:31 +0900
From: FUJITA Tomonori <fujita.tomonori@...il.com>
To: netdev@...r.kernel.org
Cc: rust-for-linux@...r.kernel.org,
	andrew@...n.ch,
	hkallweit1@...il.com,
	tmgross@...ch.edu,
	ojeda@...nel.org,
	alex.gaynor@...il.com,
	gary@...yguo.net,
	bjorn3_gh@...tonmail.com,
	benno.lossin@...ton.me,
	a.hindborg@...sung.com,
	aliceryhl@...gle.com,
	anna-maria@...utronix.de,
	frederic@...nel.org,
	tglx@...utronix.de,
	arnd@...db.de,
	linux-kernel@...r.kernel.org
Subject: [PATCH net-next v2 6/6] net: phy: qt2025: wait until PHY becomes ready

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

Signed-off-by: FUJITA Tomonori <fujita.tomonori@...il.com>
---
 drivers/net/phy/qt2025.rs | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/drivers/net/phy/qt2025.rs b/drivers/net/phy/qt2025.rs
index 1ab065798175..b5925ff9f637 100644
--- a/drivers/net/phy/qt2025.rs
+++ b/drivers/net/phy/qt2025.rs
@@ -12,6 +12,7 @@
 use kernel::c_str;
 use kernel::error::code;
 use kernel::firmware::Firmware;
+use kernel::io::poll::read_poll_timeout;
 use kernel::net::phy::{
     self,
     reg::{Mmd, C45},
@@ -19,6 +20,7 @@
 };
 use kernel::prelude::*;
 use kernel::sizes::{SZ_16K, SZ_8K};
+use kernel::time::Delta;
 
 kernel::module_phy_driver! {
     drivers: [PhyQT2025],
@@ -93,7 +95,14 @@ 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.
+        read_poll_timeout(
+            || dev.read(C45::new(Mmd::PCS, 0xd7fd)),
+            |val| val != 0x00 && val != 0x10,
+            Delta::from_millis(50),
+            Delta::from_secs(3),
+            false,
+        )?;
+
         Ok(())
     }
 
-- 
2.34.1