linux-kernel - [PATCH 1/2] ASoC: wm8960: Read initial MCLK rate from clock API

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Mon, 31 Jul 2023 11:47:02 +0100
From:   Mark Brown <broonie@...nel.org>
To:     Liam Girdwood <lgirdwood@...il.com>,
        Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>
Cc:     patches@...nsource.cirrus.com, alsa-devel@...a-project.org,
        linux-kernel@...r.kernel.org, Mark Brown <broonie@...nel.org>
Subject: [PATCH 1/2] ASoC: wm8960: Read initial MCLK rate from clock API

When we have a MCLK provided by the clock API read the rate at startup
and store it so that there's something set before the machine driver has
done clocking configuration (eg, if it only configures clocking based on
sample rate).

Signed-off-by: Mark Brown <broonie@...nel.org>
---
 sound/soc/codecs/wm8960.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/sound/soc/codecs/wm8960.c b/sound/soc/codecs/wm8960.c
index 366f5d769d6d..c0ce1ef75a74 100644
--- a/sound/soc/codecs/wm8960.c
+++ b/sound/soc/codecs/wm8960.c
@@ -1425,6 +1425,14 @@ static int wm8960_i2c_probe(struct i2c_client *i2c)
 	if (IS_ERR(wm8960->mclk)) {
 		if (PTR_ERR(wm8960->mclk) == -EPROBE_DEFER)
 			return -EPROBE_DEFER;
+	} else {
+		ret = clk_get_rate(wm8960->mclk);
+		if (ret >= 0) {
+			wm8960->freq_in = ret;
+		} else {
+			dev_err(&i2c->dev, "Failed to read MCLK rate: %d\n",
+				ret);
+		}
 	}
 
 	wm8960->regmap = devm_regmap_init_i2c(i2c, &wm8960_regmap);

-- 
2.39.2