ath79: set number of chipselect lines

All chipsets from AR7100 up to QCA9563 have three dedicated chipselect
lines for the integrated SPI controller. Remove the number of
chipselects from the platform data, as there is no need to manually set
this to a different value.

Signed-off-by: David Bauer <mail@david-bauer.net>

1 files changed, 26 insertions, 0 deletions

diff --git a/target/linux/ath79/patches-5.10/412-spi-ath79-set-number-of-chipselect-lines.patch b/target/linux/ath79/patches-5.10/412-spi-ath79-set-number-of-chipselect-lines.patch
new file mode 100644
index 0000000000..614bcbcded
--- /dev/null
+++ b/target/linux/ath79/patches-5.10/412-spi-ath79-set-number-of-chipselect-lines.patch
@@ -0,0 +1,26 @@
+From e2e9f6d9f9bd7449ff113c157b639ce1a24b9d3f Mon Sep 17 00:00:00 2001
+From: David Bauer <mail@david-bauer.net>
+Date: Sat, 24 Apr 2021 16:14:48 +0200
+Subject: [PATCH 2/2] spi: ath79: set number of chipselect lines
+
+All chipsets from AR7100 up to QCA9563 have three dedicated chipselect
+lines for the integrated SPI controller. Remove the number of
+chipselects from the platform data, as there is no need to manually set
+this to a different value.
+
+Signed-off-by: David Bauer <mail@david-bauer.net>
+---
+ drivers/spi/spi-ath79.c                 | 2 +-
+ include/linux/platform_data/spi-ath79.h | 1 -
+ 2 files changed, 1 insertion(+), 2 deletions(-)
+
+--- a/drivers/spi/spi-ath79.c
++++ b/drivers/spi/spi-ath79.c
+@@ -187,6 +187,7 @@ static int ath79_spi_probe(struct platfo
+ 	master->use_gpio_descriptors = true;
+ 	master->bits_per_word_mask = SPI_BPW_RANGE_MASK(1, 32);
+ 	master->flags = SPI_MASTER_GPIO_SS;
++	master->num_chipselect = 3;
+ 
+ 	sp->bitbang.master = master;
+ 	sp->bitbang.chipselect = ath79_spi_chipselect;