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authorMiquel Raynal <miquel.raynal@bootlin.com>2019-11-08 15:07:43 +0100
committerMark Brown <broonie@kernel.org>2019-11-08 17:44:49 +0000
commit8f16292d8b492ca6b0d58ac0769de1c1a7bbb544 (patch)
tree8b31146a9b943671949b6b999d3c6372a7a7754a /drivers
parentdffaf7439979e6dbb820633bb4f44dcadcac847e (diff)
downloadlinux-8f16292d8b492ca6b0d58ac0769de1c1a7bbb544.tar.bz2
spi: zynq-qspi: Do the actual hardware initialization later in the probe
Supporting more than one CS will need some tweaking of the linear configuration register which is (rightfully) initialized in the hardware initialization helper. The extra initialization needs the knowledge of the actual number of CS, which is retrieved by reading the value of the num-cs DT property. As the initialization helper is called pretty early and might be called much later in the probe without side effect, let's delay it a bit so that the number of CS will be available when running this helper. This way, adding support for multiple CS lines in a next patch will be eased. Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> Link: https://lore.kernel.org/r/20191108140744.1734-7-miquel.raynal@bootlin.com Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/spi/spi-zynq-qspi.c7
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/spi/spi-zynq-qspi.c b/drivers/spi/spi-zynq-qspi.c
index 80e51c894eaa..e76f9c9738f0 100644
--- a/drivers/spi/spi-zynq-qspi.c
+++ b/drivers/spi/spi-zynq-qspi.c
@@ -657,9 +657,6 @@ static int zynq_qspi_probe(struct platform_device *pdev)
goto clk_dis_pclk;
}
- /* QSPI controller initializations */
- zynq_qspi_init_hw(xqspi);
-
xqspi->irq = platform_get_irq(pdev, 0);
if (xqspi->irq <= 0) {
ret = -ENXIO;
@@ -690,6 +687,10 @@ static int zynq_qspi_probe(struct platform_device *pdev)
ctlr->setup = zynq_qspi_setup_op;
ctlr->max_speed_hz = clk_get_rate(xqspi->refclk) / 2;
ctlr->dev.of_node = np;
+
+ /* QSPI controller initializations */
+ zynq_qspi_init_hw(xqspi);
+
ret = devm_spi_register_controller(&pdev->dev, ctlr);
if (ret) {
dev_err(&pdev->dev, "spi_register_master failed\n");