6.13-stable review patch. If anyone has any objections, please let me know.
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From: Angelo Dureghello adureghello@baylibre.com
[ Upstream commit 6cc60bc38e8428544f8f4f12ddb6cc05fc83a7da ]
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: e61d7178429a ("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-v... Signed-off-by: Jonathan Cameron Jonathan.Cameron@huawei.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/iio/dac/adi-axi-dac.c | 8 ++++++++ 1 file changed, 8 insertions(+)
diff --git a/drivers/iio/dac/adi-axi-dac.c b/drivers/iio/dac/adi-axi-dac.c index b143f7ed68472..ac871deb8063c 100644 --- a/drivers/iio/dac/adi-axi-dac.c +++ b/drivers/iio/dac/adi-axi-dac.c @@ -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);