From f9ec176cd684c83a60638123da0b34c7c82f0c74 Mon Sep 17 00:00:00 2001
From: Sameer Pujar <spujar@nvidia.com>
Date: Thu, 23 Jul 2020 13:43:31 +0530
Subject: [PATCH] ASoC: tegra: Fix build error due to 64-by-32 division
Git-commit: f9ec176cd684c83a60638123da0b34c7c82f0c74
Patch-mainline: v5.9-rc1
References: jsc#SLE-16518
Build errors are seen on 32-bit platforms because of a plain 64-by-32
division. For example, following build erros were reported.
"error: modpost: "__udivdi3" [sound/soc/tegra/snd-soc-tegra210-dmic.ko] undefined!"
"error: modpost: "__divdi3" [sound/soc/tegra/snd-soc-tegra210-dmic.ko] undefined!"
This can be fixed by using div_u64() helper from 'math64.h' header.
Fixes: 8c8ff982e9e2 ("ASoC: tegra: Add Tegra210 based DMIC driver")
Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reported-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Sameer Pujar <spujar@nvidia.com>
Link: https://lore.kernel.org/r/1595492011-2411-1-git-send-email-spujar@nvidia.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
sound/soc/tegra/tegra210_dmic.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/sound/soc/tegra/tegra210_dmic.c b/sound/soc/tegra/tegra210_dmic.c
index ff6fd652a9a2..d682414ad90d 100644
--- a/sound/soc/tegra/tegra210_dmic.c
+++ b/sound/soc/tegra/tegra210_dmic.c
@@ -6,6 +6,7 @@
#include <linux/clk.h>
#include <linux/device.h>
+#include <linux/math64.h>
#include <linux/module.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
@@ -129,7 +130,7 @@ static int tegra210_dmic_hw_params(struct snd_pcm_substream *substream,
* Boost Gain Volume control has 100x factor.
*/
if (dmic->boost_gain)
- gain_q23 = (gain_q23 * dmic->boost_gain) / 100;
+ gain_q23 = div_u64(gain_q23 * dmic->boost_gain, 100);
regmap_write(dmic->regmap, TEGRA210_DMIC_LP_FILTER_GAIN,
(unsigned int)gain_q23);
--
2.16.4