mac80211: brcmfmac: backport more kernel 5.4 changes

Patch getting RAM info got upstreamed. A debugging fs entry for testing
reset feature was added.

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
(cherry picked from commit 681acdcc54d2e59135bb706c38bed942f74ccf74)

1 files changed, 59 insertions, 0 deletions

diff --git a/package/kernel/mac80211/patches/357-v5.4-0002-brcmfmac-add-reset-debugfs-entry-for-testing-reset.patch b/package/kernel/mac80211/patches/357-v5.4-0002-brcmfmac-add-reset-debugfs-entry-for-testing-reset.patch
new file mode 100644
index 0000000000..b5a957b9b1
--- /dev/null
+++ b/package/kernel/mac80211/patches/357-v5.4-0002-brcmfmac-add-reset-debugfs-entry-for-testing-reset.patch
@@ -0,0 +1,59 @@
+From 2f8c8e62cd50d72ac68de884a09c6f5a969a269c Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
+Date: Sun, 1 Sep 2019 13:34:36 +0200
+Subject: [PATCH] brcmfmac: add "reset" debugfs entry for testing reset
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+This is a trivial debugfs entry for triggering reset just like in case
+of firmware crash. It works by writing 1 to it:
+echo 1 > reset
+
+Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
+Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
+---
+ .../broadcom/brcm80211/brcmfmac/core.c        | 25 +++++++++++++++++++
+ 1 file changed, 25 insertions(+)
+
+--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.c
++++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.c
+@@ -1065,6 +1065,29 @@ static void brcmf_core_bus_reset(struct
+ 	brcmf_bus_reset(drvr->bus_if);
+ }
+ 
++static ssize_t bus_reset_write(struct file *file, const char __user *user_buf,
++			       size_t count, loff_t *ppos)
++{
++	struct brcmf_pub *drvr = file->private_data;
++	u8 value;
++
++	if (kstrtou8_from_user(user_buf, count, 0, &value))
++		return -EINVAL;
++
++	if (value != 1)
++		return -EINVAL;
++
++	schedule_work(&drvr->bus_reset);
++
++	return count;
++}
++
++static const struct file_operations bus_reset_fops = {
++	.open	= simple_open,
++	.llseek	= no_llseek,
++	.write	= bus_reset_write,
++};
++
+ int brcmf_bus_started(struct device *dev)
+ {
+ 	int ret = -1;
+@@ -1096,6 +1119,8 @@ int brcmf_bus_started(struct device *dev
+ 		goto fail;
+ 
+ 	brcmf_debugfs_add_entry(drvr, "revinfo", brcmf_revinfo_read);
++	debugfs_create_file("reset", 0600, brcmf_debugfs_get_devdir(drvr), drvr,
++			    &bus_reset_fops);
+ 
+ 	/* assure we have chipid before feature attach */
+ 	if (!bus_if->chip) {