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spi: spi-cadence: Enable spi refclk in slave mode

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When spi-cadence is configured as a slave, it requires the SPI refclk to
detect the synchronization start condition while communicating with the
master. However, the spi-cadence driver never enables the SPI refclk in
slave mode, causing the refclk to remain disabled if the
"clk_ignore_unused" kernel parameter is not passed through bootargs.
As a result, the slave cannot detect data sent by the master, leading to
communication failure. Update driver to enable the SPI refclk in both
master and slave configurations.

Fixes: b1b90514ea ("spi: spi-cadence: Add support for Slave mode")
Signed-off-by: Amit Kumar Mahapatra <amit.kumar-mahapatra@amd.com>
Link: https://msgid.link/r/20240617153837.29861-1-amit.kumar-mahapatra@amd.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Amit Kumar Mahapatra 2024-06-17 21:08:37 +05:30 committed by Mark Brown
parent 6914ee9cd1
commit 78b05172b4
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GPG Key ID: 24D68B725D5487D0
1 changed files with 7 additions and 7 deletions
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14
drivers/spi/spi-cadence.c
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@ -601,14 +601,14 @@ static int cdns_spi_probe(struct platform_device *pdev)
reset_control_assert(xspi->rstc);
reset_control_deassert(xspi->rstc);
if (!spi_controller_is_target(ctlr)) {
xspi->ref_clk = devm_clk_get_enabled(&pdev->dev, "ref_clk");
if (IS_ERR(xspi->ref_clk)) {
dev_err(&pdev->dev, "ref_clk clock not found.\n");
ret = PTR_ERR(xspi->ref_clk);
goto remove_ctlr;
}
xspi->ref_clk = devm_clk_get_enabled(&pdev->dev, "ref_clk");
if (IS_ERR(xspi->ref_clk)) {
dev_err(&pdev->dev, "ref_clk clock not found.\n");
ret = PTR_ERR(xspi->ref_clk);
goto remove_ctlr;
}
if (!spi_controller_is_target(ctlr)) {
pm_runtime_use_autosuspend(&pdev->dev);
pm_runtime_set_autosuspend_delay(&pdev->dev, SPI_AUTOSUSPEND_TIMEOUT);
pm_runtime_get_noresume(&pdev->dev);