From: Thomas Wismer <thomas@wismer.xyz>
To: Oleksij Rempel <o.rempel@pengutronix.de>,
Kory Maincent <kory.maincent@bootlin.com>,
Andrew Lunn <andrew+netdev@lunn.ch>,
"David S. Miller" <davem@davemloft.net>,
Eric Dumazet <edumazet@google.com>,
Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>
Cc: Thomas Wismer <thomas.wismer@scs.ch>,
netdev@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH net] net: pse-pd: tps23881: Fix current measurement scaling
Date: Mon, 6 Oct 2025 22:40:29 +0200 [thread overview]
Message-ID: <20251006204029.7169-2-thomas@wismer.xyz> (raw)
From: Thomas Wismer <thomas.wismer@scs.ch>
The TPS23881 improves on the TPS23880 with current sense resistors reduced
from 255 mOhm to 200 mOhm. This has a direct impact on the scaling of the
current measurement. However, the latest TPS23881 data sheet from May 2023
still shows the scaling of the TPS23880 model.
Fixes: 7f076ce3f1733 ("net: pse-pd: tps23881: Add support for power limit and measurement features")
Signed-off-by: Thomas Wismer <thomas.wismer@scs.ch>
---
drivers/net/pse-pd/tps23881.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/pse-pd/tps23881.c b/drivers/net/pse-pd/tps23881.c
index 63f8f43062bc..b724b222ab44 100644
--- a/drivers/net/pse-pd/tps23881.c
+++ b/drivers/net/pse-pd/tps23881.c
@@ -62,7 +62,7 @@
#define TPS23881_REG_SRAM_DATA 0x61
#define TPS23881_UV_STEP 3662
-#define TPS23881_NA_STEP 70190
+#define TPS23881_NA_STEP 89500
#define TPS23881_MW_STEP 500
#define TPS23881_MIN_PI_PW_LIMIT_MW 2000
--
2.43.0
next reply other threads:[~2025-10-06 21:18 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-10-06 20:40 Thomas Wismer [this message]
2025-10-07 8:53 ` [PATCH net] net: pse-pd: tps23881: Fix current measurement scaling Kory Maincent
2025-10-08 1:50 ` patchwork-bot+netdevbpf
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