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61 lines
1.8 KiB
Diff
61 lines
1.8 KiB
Diff
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From 630df9786fdaeb78c21f1e28c9b70ac83a1b482c Mon Sep 17 00:00:00 2001
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From: Vincent Tremblay <vincent@vtremblay.dev>
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Date: Sat, 31 Dec 2022 09:24:00 -0500
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Subject: [PATCH] ath10k: read qcom,coexist-support as a u32
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Read qcom,coexist-support as a u32 instead of a u8
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When we set the property to <1> in the DT (as specified in the doc),
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"of_property_read_u8" read 0 instead of 1. This is because of the data format.
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By default <1> is written with 32 bits.
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The problem is that the driver is trying to read a u8.
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The difference can be visualized using hexdump in a running device:
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Default 32 bits output:
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=======================
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0000000 0000 0100
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0000004
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8 bits output:
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==============
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0000000 0001
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0000001
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By changing "of_property_read_u8" by "of_property_read_u32", the driver
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is aligned with the documentation and is able to read the value without
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modifying the DT.
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The other solution would be to force the value in the DT to be saved as
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an 8 bits value (qcom,coexist-support = /bits/ 8 <1>),
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which is against the doc and less intuitive.
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Validation:
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===========
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The patch was tested on a real device and we can see in the debug logs
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that the feature is properly initialized:
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[ 109.102097] ath10k_ahb a000000.wifi: boot coex_support 1 coex_gpio_pin 52
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Signed-off-by: Vincent Tremblay <vincent@vtremblay.dev>
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--- a/ath10k-5.15/core.c
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+++ b/ath10k-5.15/core.c
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@@ -2798,14 +2798,14 @@ done:
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static void ath10k_core_fetch_btcoex_dt(struct ath10k *ar)
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{
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struct device_node *node;
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- u8 coex_support = 0;
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+ u32 coex_support = 0;
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int ret;
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node = ar->dev->of_node;
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if (!node)
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goto out;
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- ret = of_property_read_u8(node, "qcom,coexist-support", &coex_support);
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+ ret = of_property_read_u32(node, "qcom,coexist-support", &coex_support);
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if (ret) {
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ar->coex_support = true;
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goto out;
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