bcm53xx: update pinctrl driver & use its new DT binding

Driver has been updated upstream to support more precise DT binding and
avoid mapping conflicts between pinctrl and USB 2.0 PHY.

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
(cherry picked from commit a28f6ab27f9ae1a08c6945013cdb796b12ce150d)

2 files changed, 130 insertions, 0 deletions

diff --git a/target/linux/bcm53xx/patches-4.14/084-v4.21-pinctrl-bcm-ns-support-updated-DT-binding-as-syscon-.patch b/target/linux/bcm53xx/patches-4.14/084-v4.21-pinctrl-bcm-ns-support-updated-DT-binding-as-syscon-.patch
new file mode 100644
index 0000000000..45595bddc9
--- /dev/null
+++ b/target/linux/bcm53xx/patches-4.14/084-v4.21-pinctrl-bcm-ns-support-updated-DT-binding-as-syscon-.patch
@@ -0,0 +1,99 @@
+From a49d784d5a8272d0f63c448fe8dc69e589db006e Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
+Date: Tue, 18 Dec 2018 16:58:08 +0100
+Subject: [PATCH] pinctrl: bcm: ns: support updated DT binding as syscon
+ subnode
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Documentation has been recently updated specifying that pinctrl should
+be subnode of the CRU "syscon". Support that by using parent node for
+regmap and reading "offset" property from the DT.
+
+Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
+Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
+---
+ drivers/pinctrl/bcm/pinctrl-ns.c | 29 +++++++++++++++++++----------
+ 1 file changed, 19 insertions(+), 10 deletions(-)
+
+--- a/drivers/pinctrl/bcm/pinctrl-ns.c
++++ b/drivers/pinctrl/bcm/pinctrl-ns.c
+@@ -5,6 +5,7 @@
+ 
+ #include <linux/err.h>
+ #include <linux/io.h>
++#include <linux/mfd/syscon.h>
+ #include <linux/module.h>
+ #include <linux/of.h>
+ #include <linux/of_device.h>
+@@ -12,6 +13,7 @@
+ #include <linux/pinctrl/pinctrl.h>
+ #include <linux/pinctrl/pinmux.h>
+ #include <linux/platform_device.h>
++#include <linux/regmap.h>
+ #include <linux/slab.h>
+ 
+ #define FLAG_BCM4708		BIT(1)
+@@ -22,7 +24,8 @@ struct ns_pinctrl {
+ 	struct device *dev;
+ 	unsigned int chipset_flag;
+ 	struct pinctrl_dev *pctldev;
+-	void __iomem *base;
++	struct regmap *regmap;
++	u32 offset;
+ 
+ 	struct pinctrl_desc pctldesc;
+ 	struct ns_pinctrl_group *groups;
+@@ -229,9 +232,9 @@ static int ns_pinctrl_set_mux(struct pin
+ 		unset |= BIT(pin_number);
+ 	}
+ 
+-	tmp = readl(ns_pinctrl->base);
++	regmap_read(ns_pinctrl->regmap, ns_pinctrl->offset, &tmp);
+ 	tmp &= ~unset;
+-	writel(tmp, ns_pinctrl->base);
++	regmap_write(ns_pinctrl->regmap, ns_pinctrl->offset, tmp);
+ 
+ 	return 0;
+ }
+@@ -263,13 +266,13 @@ static const struct of_device_id ns_pinc
+ static int ns_pinctrl_probe(struct platform_device *pdev)
+ {
+ 	struct device *dev = &pdev->dev;
++	struct device_node *np = dev->of_node;
+ 	const struct of_device_id *of_id;
+ 	struct ns_pinctrl *ns_pinctrl;
+ 	struct pinctrl_desc *pctldesc;
+ 	struct pinctrl_pin_desc *pin;
+ 	struct ns_pinctrl_group *group;
+ 	struct ns_pinctrl_function *function;
+-	struct resource *res;
+ 	int i;
+ 
+ 	ns_pinctrl = devm_kzalloc(dev, sizeof(*ns_pinctrl), GFP_KERNEL);
+@@ -287,12 +290,18 @@ static int ns_pinctrl_probe(struct platf
+ 		return -EINVAL;
+ 	ns_pinctrl->chipset_flag = (uintptr_t)of_id->data;
+ 
+-	res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
+-					   "cru_gpio_control");
+-	ns_pinctrl->base = devm_ioremap_resource(dev, res);
+-	if (IS_ERR(ns_pinctrl->base)) {
+-		dev_err(dev, "Failed to map pinctrl regs\n");
+-		return PTR_ERR(ns_pinctrl->base);
++	ns_pinctrl->regmap = syscon_node_to_regmap(of_get_parent(np));
++	if (IS_ERR(ns_pinctrl->regmap)) {
++		int err = PTR_ERR(ns_pinctrl->regmap);
++
++		dev_err(dev, "Failed to map pinctrl regs: %d\n", err);
++
++		return err;
++	}
++
++	if (of_property_read_u32(np, "offset", &ns_pinctrl->offset)) {
++		dev_err(dev, "Failed to get register offset\n");
++		return -ENOENT;
+ 	}
+ 
+ 	memcpy(pctldesc, &ns_pinctrl_desc, sizeof(*pctldesc));
diff --git a/target/linux/bcm53xx/patches-4.14/302-ARM-dts-BCM5301X-Update-Northstar-pinctrl-binding.patch b/target/linux/bcm53xx/patches-4.14/302-ARM-dts-BCM5301X-Update-Northstar-pinctrl-binding.patch
new file mode 100644
index 0000000000..d1d287588c
--- /dev/null
+++ b/target/linux/bcm53xx/patches-4.14/302-ARM-dts-BCM5301X-Update-Northstar-pinctrl-binding.patch
@@ -0,0 +1,31 @@
+From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
+Subject: [PATCH] ARM: dts: BCM5301X: Update Northstar pinctrl binding
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
+---
+
+--- a/arch/arm/boot/dts/bcm5301x.dtsi
++++ b/arch/arm/boot/dts/bcm5301x.dtsi
+@@ -400,16 +400,12 @@
+ 		#size-cells = <1>;
+ 
+ 		cru@100 {
+-			compatible = "simple-bus";
++			compatible = "syscon", "simple-mfd";
+ 			reg = <0x100 0x1a4>;
+-			ranges;
+-			#address-cells = <1>;
+-			#size-cells = <1>;
+ 
+-			pin-controller@1c0 {
++			pinctrl {
+ 				compatible = "brcm,bcm4708-pinmux";
+-				reg = <0x1c0 0x24>;
+-				reg-names = "cru_gpio_control";
++				offset = <0xc0>;
+ 
+ 				spi-pins {
+ 					groups = "spi_grp";