mirror of
https://github.com/coolsnowwolf/lede.git
synced 2025-07-23 17:47:28 +08:00
d81c03f05e
These patches were generated from: https://github.com/raspberrypi/linux/commits/rpi-6.12.y With the following command: git format-patch -N v6.12.27..HEAD (HEAD -> 8d3206ee456a5ecdf9ddbfd8e5e231e4f0cd716e) Exceptions: - (def)configs patches - github workflows patches - applied & reverted patches - readme patches - wireless patches Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
43 lines
1.5 KiB
Diff
43 lines
1.5 KiB
Diff
From 8a26058d84386858fc7999b0e472414fb55051d8 Mon Sep 17 00:00:00 2001
|
|
From: Phil Elwell <phil@raspberrypi.com>
|
|
Date: Mon, 8 Jan 2024 11:42:57 +0000
|
|
Subject: [PATCH] spi: bcm2835: Support spi0-0cs and SPI_NO_CS mode
|
|
|
|
The forced conversion of native CS lines into software CS lines is done
|
|
whether or not the controller has been given any CS lines to use. This
|
|
breaks the use of the spi0-0cs overlay to prevent SPI from claiming any
|
|
CS lines, particularly with spidev which doesn't pass in the SPI_NO_CS
|
|
flag at creation.
|
|
|
|
Use the presence of an empty cs-gpios property as an indication that no
|
|
CS lines should be used, bypassing the native CS conversion code.
|
|
|
|
See: https://github.com/raspberrypi/linux/issues/5835
|
|
|
|
Signed-off-by: Phil Elwell <phil@raspberrypi.com>
|
|
---
|
|
drivers/spi/spi-bcm2835.c | 5 +++++
|
|
1 file changed, 5 insertions(+)
|
|
|
|
--- a/drivers/spi/spi-bcm2835.c
|
|
+++ b/drivers/spi/spi-bcm2835.c
|
|
@@ -1231,6 +1231,7 @@ static int bcm2835_spi_setup(struct spi_
|
|
"brcm,bcm2711-gpio",
|
|
"brcm,bcm7211-gpio",
|
|
};
|
|
+ int len;
|
|
int ret, i;
|
|
u32 cs;
|
|
|
|
@@ -1304,6 +1305,10 @@ static int bcm2835_spi_setup(struct spi_
|
|
if (i == ARRAY_SIZE(pinctrl_compats))
|
|
return 0;
|
|
|
|
+ /* Skip forced CS conversion if controller has an empty cs-gpios property */
|
|
+ if (of_find_property(ctlr->dev.of_node, "cs-gpios", &len) && len == 0)
|
|
+ return 0;
|
|
+
|
|
/*
|
|
* TODO: The code below is a slightly better alternative to the utter
|
|
* abuse of the GPIO API that I found here before. It creates a
|