On 7/23/20 1:13 AM, Sameer Pujar wrote:
> 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@xxxxxxxxxxxxxx>
> Reported-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
> Signed-off-by: Sameer Pujar <spujar@xxxxxxxxxx>
> ---
> 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 ff6fd65..d682414 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);
>
Yes, that fixes the division problem. Thanks.
Acked-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
Now I get these warnings:
CC [M] sound/soc/tegra/tegra210_dmic.o
../sound/soc/tegra/tegra210_dmic.c:55:12: warning: ‘tegra210_dmic_runtime_resume’ defined but not used [-Wunused-function]
static int tegra210_dmic_runtime_resume(struct device *dev)
^~~~~~~~~~~~~~~~~~~~~~~~~~~~
../sound/soc/tegra/tegra210_dmic.c:43:12: warning: ‘tegra210_dmic_runtime_suspend’ defined but not used [-Wunused-function]
static int tegra210_dmic_runtime_suspend(struct device *dev)
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
--
~Randy
Reported-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
