diff options
Diffstat (limited to 'sound/soc/sti/sti_uniperif.c')
| -rw-r--r-- | sound/soc/sti/sti_uniperif.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/sound/soc/sti/sti_uniperif.c b/sound/soc/sti/sti_uniperif.c index ee91ae5f812a..98eb205a0b62 100644 --- a/sound/soc/sti/sti_uniperif.c +++ b/sound/soc/sti/sti_uniperif.c @@ -7,6 +7,7 @@ #include <linux/module.h> #include <linux/pinctrl/consumer.h> +#include <linux/delay.h> #include "uniperif.h" @@ -97,6 +98,28 @@ static const struct of_device_id snd_soc_sti_match[] = { {}, }; +int sti_uniperiph_reset(struct uniperif *uni) +{ + int count = 10; + + /* Reset uniperipheral uni */ + SET_UNIPERIF_SOFT_RST_SOFT_RST(uni); + + if (uni->ver < SND_ST_UNIPERIF_VERSION_UNI_PLR_TOP_1_0) { + while (GET_UNIPERIF_SOFT_RST_SOFT_RST(uni) && count) { + udelay(5); + count--; + } + } + + if (!count) { + dev_err(uni->dev, "Failed to reset uniperif\n"); + return -EIO; + } + + return 0; +} + int sti_uniperiph_set_tdm_slot(struct snd_soc_dai *dai, unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width) |