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iio: dac: adi-axi-dac: modify stream enable

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Change suggested from the AXI HDL team, modify the function
axi_dac_data_stream_enable() to check for interface busy, to avoid
possible issues when starting the stream.

Fixes: e61d717842 ("iio: dac: adi-axi-dac: extend features")
Reviewed-by: Nuno Sa <nuno.sa@analog.com>
Signed-off-by: Angelo Dureghello <adureghello@baylibre.com>
Link: https://patch.msgid.link/20250114-wip-bl-ad3552r-axi-v0-iio-testing-carlos-v4-3-979402e33545@baylibre.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Angelo Dureghello
2025-01-14 16:30:12 +01:00
committed by Jonathan Cameron
parent 32f80e2034
commit 6cc60bc38e
1 changed files with 8 additions and 0 deletions
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8
drivers/iio/dac/adi-axi-dac.c
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@@ -585,6 +585,14 @@ static int axi_dac_ddr_disable(struct iio_backend *back)
static int axi_dac_data_stream_enable(struct iio_backend *back)
{
struct axi_dac_state *st = iio_backend_get_priv(back);
int ret, val;
ret = regmap_read_poll_timeout(st->regmap,
AXI_DAC_UI_STATUS_REG, val,
FIELD_GET(AXI_DAC_UI_STATUS_IF_BUSY, val) == 0,
10, 100 * KILO);
if (ret)
return ret;
return regmap_set_bits(st->regmap, AXI_DAC_CUSTOM_CTRL_REG,
AXI_DAC_CUSTOM_CTRL_STREAM_ENABLE);