From 8196f7bcc2adf21f83d82691d537fcef7abaa1c7 Mon Sep 17 00:00:00 2001 From: Etienne Carriere Date: Mon, 3 Feb 2020 14:50:47 +0100 Subject: [PATCH] spi: stm32-qspi: defer probe for reset controller Changes stm32 QSPI driver to defer its probe operation when a reset controller device have not yet probed but is registered in the system. Signed-off-by: Etienne Carriere Signed-off-by: Patrice Chotard Link: https://lore.kernel.org/r/20200203135048.1299-2-patrice.chotard@st.com Signed-off-by: Mark Brown --- drivers/spi/spi-stm32-qspi.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/spi/spi-stm32-qspi.c b/drivers/spi/spi-stm32-qspi.c index 4ef569b47aa6..13bb64bf4c8f 100644 --- a/drivers/spi/spi-stm32-qspi.c +++ b/drivers/spi/spi-stm32-qspi.c @@ -615,7 +615,11 @@ static int stm32_qspi_probe(struct platform_device *pdev) } rstc = devm_reset_control_get_exclusive(dev, NULL); - if (!IS_ERR(rstc)) { + if (IS_ERR(rstc)) { + ret = PTR_ERR(rstc); + if (ret == -EPROBE_DEFER) + goto err; + } else { reset_control_assert(rstc); udelay(2); reset_control_deassert(rstc);