linux-kernel - [PATCH RFC 4/7] i2c: mux: ltc4306: set correct idle_state in i2c_mux

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Message-Id: <20250922-i2c-mux-v1-4-28c94a610930@gmail.com>
Date: Mon, 22 Sep 2025 08:20:59 +0200
From: Marcus Folkesson <marcus.folkesson@...il.com>
To: Wolfram Sang <wsa+renesas@...g-engineering.com>, 
 Peter Rosin <peda@...ntia.se>, 
 Michael Hennerich <michael.hennerich@...log.com>, 
 Bartosz Golaszewski <brgl@...ev.pl>, Andi Shyti <andi.shyti@...nel.org>
Cc: linux-i2c@...r.kernel.org, linux-kernel@...r.kernel.org, 
 linux-arm-kernel@...ts.infradead.org, 
 Marcus Folkesson <marcus.folkesson@...il.com>
Subject: [PATCH RFC 4/7] i2c: mux: ltc4306: set correct idle_state in
 i2c_mux_core

Inform the core if we intend to disconnect channels during idle.

Signed-off-by: Marcus Folkesson <marcus.folkesson@...il.com>
---
 drivers/i2c/muxes/i2c-mux-ltc4306.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/i2c/muxes/i2c-mux-ltc4306.c b/drivers/i2c/muxes/i2c-mux-ltc4306.c
index 50fbc0d06e62b2743dd7f20c9863d56009dcf0e9..4e81002e2e4d6c63f13cf44e16581aff836f7d4f 100644
--- a/drivers/i2c/muxes/i2c-mux-ltc4306.c
+++ b/drivers/i2c/muxes/i2c-mux-ltc4306.c
@@ -232,6 +232,9 @@ static int ltc4306_probe(struct i2c_client *client)
 	data = i2c_mux_priv(muxc);
 	data->chip = chip;
 
+	if (idle_disc)
+		i2c_mux_set_idle_state(muxc, MUX_IDLE_DISCONNECT);
+
 	i2c_set_clientdata(client, muxc);
 
 	data->regmap = devm_regmap_init_i2c(client, &ltc4306_regmap_config);

-- 
2.50.1