Initial commit

target/linux/ramips/patches-5.4/301-MIPS-ralink-mt7621-introduce-soc_device-initializati.patch

@@ -0,0 +1,89 @@
+From f798b7588bd7397bbab958281ca6c88d08714941 Mon Sep 17 00:00:00 2001
+From: Sergio Paracuellos <sergio.paracuellos@gmail.com>
+Date: Thu, 12 Mar 2020 12:29:15 +0100
+Subject: [PATCH] MIPS: ralink: mt7621: introduce 'soc_device' initialization
+
+mt7621 SoC has its own 'ralink_soc_info' structure with some
+information about the soc itself. Pcie controller and pcie phy
+drivers for this soc which are still in staging git tree make uses
+of 'soc_device_attribute' looking for revision 'E2' in order to
+know if reset lines are or not inverted. This way of doing things
+seems to be necessary in order to make things clean and properly.
+Hence, introduce this 'soc_device' to be able to properly use those
+attributes in drivers. Also set 'data' pointer points to the struct
+'ralink_soc_info' to be able to export also current soc information
+using this mechanism.
+
+Cc: Paul Burton <paul.burton@mips.com>
+Cc: ralf@linux-mips.org
+Cc: jhogan@kernel.org
+Cc: john@phrozen.org
+Cc: NeilBrown <neil@brown.name>
+Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+Cc: linux-mips@vger.kernel.org
+
+Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
+Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
+---
+ arch/mips/ralink/mt7621.c | 32 +++++++++++++++++++++++++++++++-
+ 1 file changed, 31 insertions(+), 1 deletion(-)
+
+--- a/arch/mips/ralink/mt7621.c
++++ b/arch/mips/ralink/mt7621.c
+@@ -7,6 +7,8 @@
+ 
+ #include <linux/kernel.h>
+ #include <linux/init.h>
++#include <linux/slab.h>
++#include <linux/sys_soc.h>
+ #include <linux/jiffies.h>
+ #include <linux/clk.h>
+ #include <linux/clkdev.h>
+@@ -294,6 +296,33 @@ static int udelay_recal(void)
+ }
+ device_initcall(udelay_recal);
+ 
++static void soc_dev_init(struct ralink_soc_info *soc_info, u32 rev)
++{
++	struct soc_device *soc_dev;
++	struct soc_device_attribute *soc_dev_attr;
++
++	soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
++	if (!soc_dev_attr)
++		return;
++
++	soc_dev_attr->soc_id = "mt7621";
++	soc_dev_attr->family = "Ralink";
++
++	if (((rev >> CHIP_REV_VER_SHIFT) & CHIP_REV_VER_MASK) == 1 &&
++	    (rev & CHIP_REV_ECO_MASK) == 1)
++		soc_dev_attr->revision = "E2";
++	else
++		soc_dev_attr->revision = "E1";
++
++	soc_dev_attr->data = soc_info;
++
++	soc_dev = soc_device_register(soc_dev_attr);
++	if (IS_ERR(soc_dev)) {
++		kfree(soc_dev_attr);
++		return;
++	}
++}
++
+ void prom_soc_init(struct ralink_soc_info *soc_info)
+ {
+ 	void __iomem *sysc = (void __iomem *) KSEG1ADDR(MT7621_SYSC_BASE);
+@@ -345,11 +374,12 @@ void prom_soc_init(struct ralink_soc_inf
+ 	soc_info->mem_detect = mt7621_memory_detect;
+ 	rt2880_pinmux_data = mt7621_pinmux_data;
+ 
+-
+ 	if (!register_cps_smp_ops())
+ 		return;
+ 	if (!register_cmp_smp_ops())
+ 		return;
+ 	if (!register_vsmp_smp_ops())
+ 		return;
++
++	soc_dev_init(soc_info, rev);
+ }