mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-29 10:08:59 +00:00
cddd459140
Add patches for linux-5.4. The patches are from NXP LSDK-20.04 release which was tagged LSDK-20.04-V5.4. https://source.codeaurora.org/external/qoriq/qoriq-components/linux/ For boards LS1021A-IOT, and Traverse-LS1043 which are not involved in LSDK, port the dts patches from 4.14. The patches are sorted into the following categories: 301-arch-xxxx 302-dts-xxxx 303-core-xxxx 701-net-xxxx 801-audio-xxxx 802-can-xxxx 803-clock-xxxx 804-crypto-xxxx 805-display-xxxx 806-dma-xxxx 807-gpio-xxxx 808-i2c-xxxx 809-jailhouse-xxxx 810-keys-xxxx 811-kvm-xxxx 812-pcie-xxxx 813-pm-xxxx 814-qe-xxxx 815-sata-xxxx 816-sdhc-xxxx 817-spi-xxxx 818-thermal-xxxx 819-uart-xxxx 820-usb-xxxx 821-vfio-xxxx Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>
107 lines
3.2 KiB
Diff
107 lines
3.2 KiB
Diff
From f2991d30ff590bf932483a6dfc16c7ebe2f83341 Mon Sep 17 00:00:00 2001
|
|
From: Laurentiu Tudor <laurentiu.tudor@nxp.com>
|
|
Date: Fri, 13 Apr 2018 12:42:40 +0300
|
|
Subject: [PATCH] bus: fsl-mc: add device binding path 'driver_override'
|
|
|
|
This patch is required for vfio-fsl-mc meta driver to successfully bind
|
|
layerscape container devices for device passthrough. This patch adds
|
|
a mechanism to allow a layerscape device to specify a driver rather than
|
|
a layerscape driver provide a device match.
|
|
|
|
This patch is based on following proposed patches for PCI and platform
|
|
devices
|
|
- https://lkml.org/lkml/2014/4/8/571 :- For Platform devices
|
|
- http://lists-archives.com/linux-kernel/28030441-pci-introduce-new-device-binding-path-using-pci_dev-driver_override.html
|
|
:- For PCI devices
|
|
|
|
Example to allow a device (dprc.1) to specifically bind
|
|
with driver (vfio-fsl-mc):-
|
|
- echo vfio-fsl-mc > /sys/bus/fsl-mc/devices/dprc.1/driver_override
|
|
- echo dprc.1 > /sys/bus/fsl-mc/drivers/fsl_mc_dprc/unbind
|
|
- echo dprc.1 > /sys/bus/fsl-mc/drivers/vfio-fsl-mc/bind
|
|
|
|
Signed-off-by: Bharat Bhushan <Bharat.Bhushan@nxp.com>
|
|
Signed-off-by: Laurentiu Tudor <laurentiu.tudor@nxp.com>
|
|
---
|
|
drivers/bus/fsl-mc/fsl-mc-bus.c | 53 +++++++++++++++++++++++++++++++++++++++++
|
|
1 file changed, 53 insertions(+)
|
|
|
|
--- a/drivers/bus/fsl-mc/fsl-mc-bus.c
|
|
+++ b/drivers/bus/fsl-mc/fsl-mc-bus.c
|
|
@@ -83,6 +83,12 @@ static int fsl_mc_bus_match(struct devic
|
|
struct fsl_mc_driver *mc_drv = to_fsl_mc_driver(drv);
|
|
bool found = false;
|
|
|
|
+ /* When driver_override is set, only bind to the matching driver */
|
|
+ if (mc_dev->driver_override) {
|
|
+ found = !strcmp(mc_dev->driver_override, mc_drv->driver.name);
|
|
+ goto out;
|
|
+ }
|
|
+
|
|
if (!mc_drv->match_id_table)
|
|
goto out;
|
|
|
|
@@ -147,8 +153,52 @@ static ssize_t modalias_show(struct devi
|
|
}
|
|
static DEVICE_ATTR_RO(modalias);
|
|
|
|
+static ssize_t driver_override_store(struct device *dev,
|
|
+ struct device_attribute *attr,
|
|
+ const char *buf, size_t count)
|
|
+{
|
|
+ struct fsl_mc_device *mc_dev = to_fsl_mc_device(dev);
|
|
+ const char *driver_override, *old = mc_dev->driver_override;
|
|
+ char *cp;
|
|
+
|
|
+ if (WARN_ON(dev->bus != &fsl_mc_bus_type))
|
|
+ return -EINVAL;
|
|
+
|
|
+ if (count >= (PAGE_SIZE - 1))
|
|
+ return -EINVAL;
|
|
+
|
|
+ driver_override = kstrndup(buf, count, GFP_KERNEL);
|
|
+ if (!driver_override)
|
|
+ return -ENOMEM;
|
|
+
|
|
+ cp = strchr(driver_override, '\n');
|
|
+ if (cp)
|
|
+ *cp = '\0';
|
|
+
|
|
+ if (strlen(driver_override)) {
|
|
+ mc_dev->driver_override = driver_override;
|
|
+ } else {
|
|
+ kfree(driver_override);
|
|
+ mc_dev->driver_override = NULL;
|
|
+ }
|
|
+
|
|
+ kfree(old);
|
|
+
|
|
+ return count;
|
|
+}
|
|
+
|
|
+static ssize_t driver_override_show(struct device *dev,
|
|
+ struct device_attribute *attr, char *buf)
|
|
+{
|
|
+ struct fsl_mc_device *mc_dev = to_fsl_mc_device(dev);
|
|
+
|
|
+ return snprintf(buf, PAGE_SIZE, "%s\n", mc_dev->driver_override);
|
|
+}
|
|
+static DEVICE_ATTR_RW(driver_override);
|
|
+
|
|
static struct attribute *fsl_mc_dev_attrs[] = {
|
|
&dev_attr_modalias.attr,
|
|
+ &dev_attr_driver_override.attr,
|
|
NULL,
|
|
};
|
|
|
|
@@ -749,6 +799,9 @@ EXPORT_SYMBOL_GPL(fsl_mc_device_add);
|
|
*/
|
|
void fsl_mc_device_remove(struct fsl_mc_device *mc_dev)
|
|
{
|
|
+ kfree(mc_dev->driver_override);
|
|
+ mc_dev->driver_override = NULL;
|
|
+
|
|
/*
|
|
* The device-specific remove callback will get invoked by device_del()
|
|
*/
|