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authorAlain Volmat <alain.volmat@foss.st.com>2021-02-05 21:59:30 +0300
committerMark Brown <broonie@kernel.org>2021-02-05 22:16:59 +0300
commitc63b95b76e69b679b9b95014552db099eb77a4fa (patch)
tree4557a88d934ba65b878e6cc6885aeea0e46e1921 /drivers/spi
parent1c75cfd53e213044523141b464eb06813e39ecea (diff)
downloadlinux-c63b95b76e69b679b9b95014552db099eb77a4fa.tar.xz
spi: stm32: defer probe for reset
Defer the probe operation when a reset controller device is expected but have not yet been probed. This change replaces use of devm_reset_control_get_exclusive() with devm_reset_control_get_optional_exclusive() as reset controller is optional which is now explicitly stated. Signed-off-by: Alain Volmat <alain.volmat@foss.st.com> Link: https://lore.kernel.org/r/1612551572-495-7-git-send-email-alain.volmat@foss.st.com Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/spi')
-rw-r--r--drivers/spi/spi-stm32.c10
1 files changed, 8 insertions, 2 deletions
diff --git a/drivers/spi/spi-stm32.c b/drivers/spi/spi-stm32.c
index 561234829110..54196cecfe2e 100644
--- a/drivers/spi/spi-stm32.c
+++ b/drivers/spi/spi-stm32.c
@@ -1871,8 +1871,14 @@ static int stm32_spi_probe(struct platform_device *pdev)
goto err_clk_disable;
}
- rst = devm_reset_control_get_exclusive(&pdev->dev, NULL);
- if (!IS_ERR(rst)) {
+ rst = devm_reset_control_get_optional_exclusive(&pdev->dev, NULL);
+ if (rst) {
+ if (IS_ERR(rst)) {
+ ret = dev_err_probe(&pdev->dev, PTR_ERR(rst),
+ "failed to get reset\n");
+ goto err_clk_disable;
+ }
+
reset_control_assert(rst);
udelay(2);
reset_control_deassert(rst);