Unverified Commit c63b95b7 authored by Alain Volmat's avatar Alain Volmat Committed by Mark Brown
Browse files

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: default avatarAlain 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: default avatarMark Brown <broonie@kernel.org>
parent 1c75cfd5

drivers/spi/spi-stm32.c

+8 −2
Original line number Diff line number Diff line
@@ -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);