diff options
Diffstat (limited to 'meta-amd-bsp/recipes-kernel/linux-5.10/linux-yocto-5.10.25-amdx86/0004-spi-spidev-Add-dummy-spidev-device-to-SPI-bus.patch')
| -rw-r--r-- | meta-amd-bsp/recipes-kernel/linux-5.10/linux-yocto-5.10.25-amdx86/0004-spi-spidev-Add-dummy-spidev-device-to-SPI-bus.patch | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/meta-amd-bsp/recipes-kernel/linux-5.10/linux-yocto-5.10.25-amdx86/0004-spi-spidev-Add-dummy-spidev-device-to-SPI-bus.patch b/meta-amd-bsp/recipes-kernel/linux-5.10/linux-yocto-5.10.25-amdx86/0004-spi-spidev-Add-dummy-spidev-device-to-SPI-bus.patch new file mode 100644 index 00000000..7efbde04 --- /dev/null +++ b/meta-amd-bsp/recipes-kernel/linux-5.10/linux-yocto-5.10.25-amdx86/0004-spi-spidev-Add-dummy-spidev-device-to-SPI-bus.patch @@ -0,0 +1,100 @@ +From 838a8a77639dc2c1bb349830fe75025aacbe096b Mon Sep 17 00:00:00 2001 +From: Sanjay R Mehta <sanju.mehta@amd.com> +Date: Tue, 3 Mar 2020 14:44:41 +0530 +Subject: [PATCH 04/10] spi: spidev: Add dummy spidev device to SPI bus + +Signed-off-by: Sanjay R Mehta <sanju.mehta@amd.com> +Signed-off-by: Sudheesh Mavila <sudheesh.mavila@amd.com> +--- + drivers/spi/spidev.c | 40 +++++++++++++++++++++++++++++++++++++++- + 1 file changed, 39 insertions(+), 1 deletion(-) + +diff --git a/drivers/spi/spidev.c b/drivers/spi/spidev.c +index 859910ec8d9f..710d9d8b5383 100644 +--- a/drivers/spi/spidev.c ++++ b/drivers/spi/spidev.c +@@ -27,6 +27,8 @@ + + #include <linux/uaccess.h> + ++#define SPI_BUS 0 ++#define SPI_BUS_CS1 0 + + /* + * This supports access to SPI devices using normal userspace I/O calls. +@@ -46,6 +48,7 @@ + + static DECLARE_BITMAP(minors, N_SPI_MINORS); + ++struct spi_device *spi_device; + + /* Bit masks for spi_device.mode management. Note that incorrect + * settings for some settings can cause *lots* of trouble for other +@@ -741,7 +744,7 @@ static int spidev_probe(struct spi_device *spi) + of_device_is_compatible(spi->dev.of_node, "spidev"), + "%pOF: buggy DT: spidev listed directly in DT\n", spi->dev.of_node); + +- spidev_probe_acpi(spi); ++// spidev_probe_acpi(spi); + + /* Allocate driver data */ + spidev = kzalloc(sizeof(*spidev), GFP_KERNEL); +@@ -827,6 +830,32 @@ static struct spi_driver spidev_spi_driver = { + + /*-------------------------------------------------------------------------*/ + ++static int __init add_spi_device_to_bus(void) ++{ ++ struct spi_master *spi_master; ++ struct spi_board_info spi_info; ++ ++ spi_master = spi_busnum_to_master(SPI_BUS); ++ if (!spi_master) { ++ printk(KERN_ALERT "Please make sure to \'modprobe " ++ "spi_amd\' driver first\n"); ++ return -1; ++ } ++ memset(&spi_info, 0, sizeof(struct spi_board_info)); ++ ++ strlcpy(spi_info.modalias, "spidev", SPI_NAME_SIZE); ++ spi_info.bus_num = SPI_BUS; //Bus number of SPI master ++ spi_info.chip_select = SPI_BUS_CS1; //CS on which SPI device is connected ++ ++ spi_device = spi_new_device(spi_master, &spi_info); ++ if (!spi_device) ++ return -ENODEV; ++ ++ return 0; ++} ++ ++ ++ + static int __init spidev_init(void) + { + int status; +@@ -851,6 +880,14 @@ static int __init spidev_init(void) + class_destroy(spidev_class); + unregister_chrdev(SPIDEV_MAJOR, spidev_spi_driver.driver.name); + } ++ ++ status = add_spi_device_to_bus(); ++ if (status < 0) { ++ spi_unregister_driver(&spidev_spi_driver); ++ class_destroy(spidev_class); ++ unregister_chrdev(SPIDEV_MAJOR, spidev_spi_driver.driver.name); ++ } ++ + return status; + } + module_init(spidev_init); +@@ -858,6 +895,7 @@ module_init(spidev_init); + static void __exit spidev_exit(void) + { + spi_unregister_driver(&spidev_spi_driver); ++ spi_unregister_device(spi_device); + class_destroy(spidev_class); + unregister_chrdev(SPIDEV_MAJOR, spidev_spi_driver.driver.name); + } +-- +2.17.1 + |