layerscape: add patches-5.4

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>

1 files changed, 118 insertions, 0 deletions

diff --git a/target/linux/layerscape/patches-5.4/701-net-0309-staging-fsl_ppfe-enable-hif-event-from-userspace.patch b/target/linux/layerscape/patches-5.4/701-net-0309-staging-fsl_ppfe-enable-hif-event-from-userspace.patch
new file mode 100644
index 0000000000..785f316028
--- /dev/null
+++ b/target/linux/layerscape/patches-5.4/701-net-0309-staging-fsl_ppfe-enable-hif-event-from-userspace.patch
@@ -0,0 +1,118 @@
+From 0c072b46ecc8689be160bfdc750e95ad9879d706 Mon Sep 17 00:00:00 2001
+From: Akhil Goyal <akhil.goyal@nxp.com>
+Date: Thu, 5 Jul 2018 20:14:21 +0530
+Subject: [PATCH] staging: fsl_ppfe: enable hif event from userspace
+
+HIF interrupts are enabled using ioctl from user space,
+and epoll wait from user space wakes up when there is an HIF
+interrupt.
+
+Signed-off-by: Akhil Goyal <akhil.goyal@nxp.com>
+---
+ drivers/staging/fsl_ppfe/pfe_cdev.c | 57 +++++++++++++++++++++++++++++++++++++
+ drivers/staging/fsl_ppfe/pfe_cdev.h |  5 ++--
+ 2 files changed, 60 insertions(+), 2 deletions(-)
+
+--- a/drivers/staging/fsl_ppfe/pfe_cdev.c
++++ b/drivers/staging/fsl_ppfe/pfe_cdev.c
+@@ -20,11 +20,18 @@
+  *  - used for interacting with the kernel layer for link status
+  */
+ 
++#include <linux/eventfd.h>
++#include <linux/irqreturn.h>
++#include <linux/io.h>
++#include <asm/irq.h>
++
+ #include "pfe_cdev.h"
++#include "pfe_mod.h"
+ 
+ static int pfe_majno;
+ static struct class *pfe_char_class;
+ static struct device *pfe_char_dev;
++struct eventfd_ctx *g_trigger;
+ 
+ struct pfe_shared_info link_states[PFE_CDEV_ETH_COUNT];
+ 
+@@ -80,10 +87,44 @@ static ssize_t pfe_cdev_write(struct fil
+ 
+ static int pfe_cdev_release(struct inode *inp, struct file *fp)
+ {
++	if (g_trigger) {
++		free_irq(pfe->hif_irq, g_trigger);
++		eventfd_ctx_put(g_trigger);
++		g_trigger = NULL;
++	}
++
+ 	pr_info("PFE_CDEV: Device successfully closed\n");
+ 	return 0;
+ }
+ 
++/*
++ * hif_us_isr-
++ * This ISR routine processes Rx/Tx done interrupts from the HIF hardware block
++ */
++static irqreturn_t hif_us_isr(int irq, void *arg)
++{
++	struct eventfd_ctx *trigger = (struct eventfd_ctx *)arg;
++	int int_status;
++	int int_enable_mask;
++
++	/*Read hif interrupt source register */
++	int_status = readl_relaxed(HIF_INT_SRC);
++	int_enable_mask = readl_relaxed(HIF_INT_ENABLE);
++
++	if ((int_status & HIF_INT) == 0)
++		return IRQ_NONE;
++
++	if (int_status & HIF_RXPKT_INT) {
++		int_enable_mask &= ~(HIF_RXPKT_INT);
++		eventfd_signal(trigger, 1);
++	}
++
++	/*Disable interrupts, they will be enabled after they are serviced */
++	writel_relaxed(int_enable_mask, HIF_INT_ENABLE);
++
++	return IRQ_HANDLED;
++}
++
+ static long pfe_cdev_ioctl(struct file *fp, unsigned int cmd,
+ 			   unsigned long arg)
+ {
+@@ -105,6 +146,22 @@ static long pfe_cdev_ioctl(struct file *
+ 		pr_debug("Returning state=%d for ETH1\n", *argp);
+ 		ret = 0;
+ 		break;
++	case PFE_CDEV_HIF_INTR_EN:
++		/* Return success/failure */
++		g_trigger = eventfd_ctx_fdget(*argp);
++		if (IS_ERR(g_trigger))
++			return PTR_ERR(g_trigger);
++		ret = request_irq(pfe->hif_irq, hif_us_isr, 0, "pfe_hif",
++				  g_trigger);
++		if (ret) {
++			pr_err("%s: failed to get the hif IRQ = %d\n",
++			       __func__, pfe->hif_irq);
++			eventfd_ctx_put(g_trigger);
++			g_trigger = NULL;
++		}
++		pr_debug("request_irq for hif interrupt: %d\n", pfe->hif_irq);
++		ret = 0;
++		break;
+ 	default:
+ 		pr_info("Unsupport cmd (%d) for PFE CDEV.\n", cmd);
+ 		break;
+--- a/drivers/staging/fsl_ppfe/pfe_cdev.h
++++ b/drivers/staging/fsl_ppfe/pfe_cdev.h
+@@ -43,8 +43,9 @@ struct pfe_shared_info {
+ extern struct pfe_shared_info link_states[PFE_CDEV_ETH_COUNT];
+ 
+ /* IOCTL Commands */
+-#define PFE_CDEV_ETH0_STATE_GET	0
+-#define PFE_CDEV_ETH1_STATE_GET	1
++#define PFE_CDEV_ETH0_STATE_GET		_IOR('R', 0, int)
++#define PFE_CDEV_ETH1_STATE_GET		_IOR('R', 1, int)
++#define PFE_CDEV_HIF_INTR_EN		_IOWR('R', 2, int)
+ 
+ int pfe_cdev_init(void);
+ void pfe_cdev_exit(void);