diff mbox series

[v2,6/8] spi: stm32: defer probe for reset

Message ID 1612551572-495-7-git-send-email-alain.volmat@foss.st.com (mailing list archive)
State New, archived
Headers show
Series spi: stm32: fix and enhancements for spi-stm32 | expand

Commit Message

Alain Volmat Feb. 5, 2021, 6:59 p.m. UTC 
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>
---
v2: reordered within the serie

 drivers/spi/spi-stm32.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)
diff mbox series

Patch

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);