mediatek: v5.15: backport spi-mem ecc support

Signed-off-by: Chuanhong Guo <gch981213@gmail.com>

1 files changed, 78 insertions, 0 deletions

diff --git a/target/linux/mediatek/patches-5.15/120-04-v5.18-spi-spi-mem-Introduce-a-capability-structure.patch b/target/linux/mediatek/patches-5.15/120-04-v5.18-spi-spi-mem-Introduce-a-capability-structure.patch
new file mode 100644
index 0000000000..bcd2ee8004
--- /dev/null
+++ b/target/linux/mediatek/patches-5.15/120-04-v5.18-spi-spi-mem-Introduce-a-capability-structure.patch
@@ -0,0 +1,78 @@
+From 3e45577e70cbf8fdc5c13033114989794a3797d5 Mon Sep 17 00:00:00 2001
+From: Miquel Raynal <miquel.raynal@bootlin.com>
+Date: Thu, 27 Jan 2022 10:17:56 +0100
+Subject: [PATCH 04/15] spi: spi-mem: Introduce a capability structure
+
+Create a spi_controller_mem_caps structure and put it within the
+spi_controller structure close to the spi_controller_mem_ops
+strucure. So far the only field in this structure is the support for dtr
+operations, but soon we will add another parameter.
+
+Also create a helper to parse the capabilities and check if the
+requested capability has been set or not.
+
+Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
+Reviewed-by: Pratyush Yadav <p.yadav@ti.com>
+Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
+Reviewed-by: Tudor Ambarus <tudor.ambarus@microchip.com>
+Reviewed-by: Mark Brown <broonie@kernel.org>
+Link: https://lore.kernel.org/linux-mtd/20220127091808.1043392-2-miquel.raynal@bootlin.com
+(cherry picked from commit 4a3cc7fb6e63bcfdedec25364738f1493345bd20)
+---
+ include/linux/spi/spi-mem.h | 11 +++++++++++
+ include/linux/spi/spi.h     |  3 +++
+ 2 files changed, 14 insertions(+)
+
+diff --git a/include/linux/spi/spi-mem.h b/include/linux/spi/spi-mem.h
+index 85e2ff7b840d..38e5d45c9842 100644
+--- a/include/linux/spi/spi-mem.h
++++ b/include/linux/spi/spi-mem.h
+@@ -285,6 +285,17 @@ struct spi_controller_mem_ops {
+ 			   unsigned long timeout_ms);
+ };
+ 
++/**
++ * struct spi_controller_mem_caps - SPI memory controller capabilities
++ * @dtr: Supports DTR operations
++ */
++struct spi_controller_mem_caps {
++	bool dtr;
++};
++
++#define spi_mem_controller_is_capable(ctlr, cap)	\
++	((ctlr)->mem_caps && (ctlr)->mem_caps->cap)
++
+ /**
+  * struct spi_mem_driver - SPI memory driver
+  * @spidrv: inherit from a SPI driver
+diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h
+index 6b0b686f6f90..8ac58b1a2a9f 100644
+--- a/include/linux/spi/spi.h
++++ b/include/linux/spi/spi.h
+@@ -23,6 +23,7 @@ struct software_node;
+ struct spi_controller;
+ struct spi_transfer;
+ struct spi_controller_mem_ops;
++struct spi_controller_mem_caps;
+ 
+ /*
+  * INTERFACES between SPI master-side drivers and SPI slave protocol handlers,
+@@ -419,6 +420,7 @@ extern struct spi_device *spi_new_ancillary_device(struct spi_device *spi, u8 ch
+  * @mem_ops: optimized/dedicated operations for interactions with SPI memory.
+  *	     This field is optional and should only be implemented if the
+  *	     controller has native support for memory like operations.
++ * @mem_caps: controller capabilities for the handling of memory operations.
+  * @unprepare_message: undo any work done by prepare_message().
+  * @slave_abort: abort the ongoing transfer request on an SPI slave controller
+  * @cs_gpios: LEGACY: array of GPIO descs to use as chip select lines; one per
+@@ -643,6 +645,7 @@ struct spi_controller {
+ 
+ 	/* Optimized handlers for SPI memory-like operations. */
+ 	const struct spi_controller_mem_ops *mem_ops;
++	const struct spi_controller_mem_caps *mem_caps;
+ 
+ 	/* gpio chip select */
+ 	int			*cs_gpios;
+-- 
+2.35.1
+