linux-kernel - [PATCH 03/10] spi: dw: Add support for client driver memory operations

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Message-ID: <20200513140031.25633-4-lars.povlsen@microchip.com>
Date:   Wed, 13 May 2020 16:00:24 +0200
From:   Lars Povlsen <lars.povlsen@...rochip.com>
To:     Mark Brown <broonie@...nel.org>, SoC Team <soc@...nel.org>
CC:     Lars Povlsen <lars.povlsen@...rochip.com>,
        Microchip Linux Driver Support <UNGLinuxDriver@...rochip.com>,
        <linux-spi@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>
Subject: [PATCH 03/10] spi: dw: Add support for client driver memory operations

This minor change allow dw-spi drivers to register
spi_controller_mem_ops memory operations if the platform supports it.

Reviewed-by: Alexandre Belloni <alexandre.belloni@...tlin.com>
Signed-off-by: Lars Povlsen <lars.povlsen@...rochip.com>
---
 drivers/spi/spi-dw.c | 3 +++
 drivers/spi/spi-dw.h | 2 ++
 2 files changed, 5 insertions(+)

diff --git a/drivers/spi/spi-dw.c b/drivers/spi/spi-dw.c
index 32997f28fa5bb..d0c611c42421e 100644
--- a/drivers/spi/spi-dw.c
+++ b/drivers/spi/spi-dw.c
@@ -527,6 +527,9 @@ int dw_spi_add_host(struct device *dev, struct dw_spi *dws)
 	/* Basic HW init */
 	spi_hw_init(dev, dws);

+	/* Memory ops? */
+	master->mem_ops = dws->mem_ops;
+
 	if (dws->dma_ops && dws->dma_ops->dma_init) {
 		ret = dws->dma_ops->dma_init(dws);
 		if (ret) {
diff --git a/drivers/spi/spi-dw.h b/drivers/spi/spi-dw.h
index ed6e47b3f50da..8ecccbde10a20 100644
--- a/drivers/spi/spi-dw.h
+++ b/drivers/spi/spi-dw.h
@@ -3,6 +3,7 @@
 #define DW_SPI_HEADER_H

 #include <linux/io.h>
+#include <linux/spi/spi-mem.h>
 #include <linux/scatterlist.h>

 /* Register offsets */
@@ -116,6 +117,7 @@ struct dw_spi {
 	u16			bus_num;
 	u16			num_cs;		/* supported slave numbers */
 	void (*set_cs)(struct spi_device *spi, bool enable);
+	const struct spi_controller_mem_ops *mem_ops;

 	/* Current message transfer state info */
 	size_t			len;
--
2.26.2