linux-kernel - [PATCH v1 05/10] spi: pxa2xx: Skip SSP initialization if it's done elsewhere

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Date: Tue, 26 Mar 2024 20:07:55 +0200
From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
	Mark Brown <broonie@...nel.org>,
	linux-spi@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org
Cc: Daniel Mack <daniel@...que.org>,
	Haojian Zhuang <haojian.zhuang@...il.com>,
	Robert Jarzmik <robert.jarzmik@...e.fr>,
	Russell King <linux@...linux.org.uk>
Subject: [PATCH v1 05/10] spi: pxa2xx: Skip SSP initialization if it's done elsewhere

If SSP has been enumerated elsewhere, skip its initialization
in pxa2xx_spi_init_pdata().

Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
 drivers/spi/spi-pxa2xx.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/spi/spi-pxa2xx.c b/drivers/spi/spi-pxa2xx.c
index e7072727c25c..b01a18c89b6b 100644
--- a/drivers/spi/spi-pxa2xx.c
+++ b/drivers/spi/spi-pxa2xx.c
@@ -1355,6 +1355,7 @@ pxa2xx_spi_init_pdata(struct platform_device *pdev)
 	struct device *dev = &pdev->dev;
 	struct device *parent = dev->parent;
 	enum pxa_ssp_type type = SSP_UNDEFINED;
+	struct ssp_device *ssp = NULL;
 	const void *match;
 	bool is_lpss_priv;
 	int status;
@@ -1372,6 +1373,10 @@ pxa2xx_spi_init_pdata(struct platform_device *pdev)
 			return ERR_PTR(status);
 
 		type = (enum pxa_ssp_type)value;
+	} else {
+		ssp = pxa_ssp_request(pdev->id, pdev->name);
+		if (ssp)
+			type = ssp->type;
 	}
 
 	/* Validate the SSP type correctness */
@@ -1394,6 +1399,10 @@ pxa2xx_spi_init_pdata(struct platform_device *pdev)
 	pdata->enable_dma = true;
 	pdata->dma_burst_size = 1;
 
+	/* If SSP has been already enumerated, use it */
+	if (ssp)
+		return pdata;
+
 	status = pxa2xx_spi_init_ssp(pdev, &pdata->ssp, type);
 	if (status)
 		return ERR_PTR(status);
-- 
2.43.0.rc1.1.gbec44491f096