From: David Bauer <mail@david-bauer.net>
Date: Wed, 17 Feb 2021 02:44:55 +0100
Subject: [PATCH] spi: ath79: always call chipselect function

api-bitbang has to call the chipselect function on the ath79 SPI driver
in order to communicate with the SPI slave device.

Fixes commit 4a07b8bcd503 ("spi: bitbang: Make chipselect callback optional")

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

--- a/drivers/spi/spi-ath79.c
+++ b/drivers/spi/spi-ath79.c
@@ -152,6 +152,7 @@ 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;
 
 	sp->bitbang.master = master;
 	sp->bitbang.chipselect = ath79_spi_chipselect;