mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-26 17:01:14 +00:00
bb8fd41f9a
Changelog: https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.59 Manually rebased: bcm27xx/patches-6.1/950-0124-Add-support-for-all-the-downstream-rpi-sound-card-dr.patch Removed upstreamed: generic/backport-6.1/781-v6.6-02-net-dsa-qca8k-fix-potential-MDIO-bus-conflict-when-a.patch[1] All other patches automatically rebased. 1. https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v6.1.59&id=881050b25b1dda7b0f14d40d1b09bf38cb3b427c Build system: x86/64 Build-tested: x86/64/AMD Cezanne Run-tested: x86/64/AMD Cezanne Signed-off-by: John Audia <therealgraysky@proton.me>
74 lines
2.6 KiB
Diff
74 lines
2.6 KiB
Diff
From a4165830ca237f2b3318faf62562bce8ce12a389 Mon Sep 17 00:00:00 2001
|
|
From: Christian Marangi <ansuelsmth@gmail.com>
|
|
Date: Thu, 29 Dec 2022 17:33:36 +0100
|
|
Subject: [PATCH 5/5] net: dsa: qca8k: improve mdio master read/write by using
|
|
single lo/hi
|
|
|
|
Improve mdio master read/write by using singe mii read/write lo/hi.
|
|
|
|
In a read and write we need to poll the mdio master regs in a busy loop
|
|
to check for a specific bit present in the upper half of the reg. We can
|
|
ignore the other half since it won't contain useful data. This will save
|
|
an additional useless read for each read and write operation.
|
|
|
|
In a read operation the returned data is present in the mdio master reg
|
|
lower half. We can ignore the other half since it won't contain useful
|
|
data. This will save an additional useless read for each read operation.
|
|
|
|
In a read operation it's needed to just set the hi half of the mdio
|
|
master reg as the lo half will be replaced by the result. This will save
|
|
an additional useless write for each read operation.
|
|
|
|
Tested-by: Ronald Wahl <ronald.wahl@raritan.com>
|
|
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
|
|
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
---
|
|
drivers/net/dsa/qca/qca8k-8xxx.c | 12 ++++++------
|
|
1 file changed, 6 insertions(+), 6 deletions(-)
|
|
|
|
--- a/drivers/net/dsa/qca/qca8k-8xxx.c
|
|
+++ b/drivers/net/dsa/qca/qca8k-8xxx.c
|
|
@@ -754,9 +754,9 @@ qca8k_mdio_busy_wait(struct mii_bus *bus
|
|
|
|
qca8k_split_addr(reg, &r1, &r2, &page);
|
|
|
|
- ret = read_poll_timeout(qca8k_mii_read32, ret1, !(val & mask), 0,
|
|
+ ret = read_poll_timeout(qca8k_mii_read_hi, ret1, !(val & mask), 0,
|
|
QCA8K_BUSY_WAIT_TIMEOUT * USEC_PER_MSEC, false,
|
|
- bus, 0x10 | r2, r1, &val);
|
|
+ bus, 0x10 | r2, r1 + 1, &val);
|
|
|
|
/* Check if qca8k_read has failed for a different reason
|
|
* before returnting -ETIMEDOUT
|
|
@@ -798,7 +798,7 @@ qca8k_mdio_write(struct qca8k_priv *priv
|
|
|
|
exit:
|
|
/* even if the busy_wait timeouts try to clear the MASTER_EN */
|
|
- qca8k_mii_write32(bus, 0x10 | r2, r1, 0);
|
|
+ qca8k_mii_write_hi(bus, 0x10 | r2, r1 + 1, 0);
|
|
|
|
mutex_unlock(&bus->mdio_lock);
|
|
|
|
@@ -828,18 +828,18 @@ qca8k_mdio_read(struct qca8k_priv *priv,
|
|
if (ret)
|
|
goto exit;
|
|
|
|
- qca8k_mii_write32(bus, 0x10 | r2, r1, val);
|
|
+ qca8k_mii_write_hi(bus, 0x10 | r2, r1 + 1, val);
|
|
|
|
ret = qca8k_mdio_busy_wait(bus, QCA8K_MDIO_MASTER_CTRL,
|
|
QCA8K_MDIO_MASTER_BUSY);
|
|
if (ret)
|
|
goto exit;
|
|
|
|
- ret = qca8k_mii_read32(bus, 0x10 | r2, r1, &val);
|
|
+ ret = qca8k_mii_read_lo(bus, 0x10 | r2, r1, &val);
|
|
|
|
exit:
|
|
/* even if the busy_wait timeouts try to clear the MASTER_EN */
|
|
- qca8k_mii_write32(bus, 0x10 | r2, r1, 0);
|
|
+ qca8k_mii_write_hi(bus, 0x10 | r2, r1 + 1, 0);
|
|
|
|
mutex_unlock(&bus->mdio_lock);
|
|
|