bcm53xx: use new USB 2.0 PHY binding

This fixes:
[   10.440495] bcm_ns_usb2 1800c000.usb2-phy: can't request region for resource [mem 0x1800c000-0x1800cfff]
[   10.450039] bcm_ns_usb2 1800c000.usb2-phy: Failed to map DMU regs
[   10.456183] bcm_ns_usb2: probe of 1800c000.usb2-phy failed with error -16
caused by conflict in allocating resources.

Fixes: f55f1dbaad33 ("bcm53xx: switch to the kernel 5.10")
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>

1 files changed, 131 insertions, 0 deletions

diff --git a/target/linux/bcm53xx/patches-5.10/070-v5.17-phy-bcm-ns-usb2-support-updated-DT-binding-with-PHY-.patch b/target/linux/bcm53xx/patches-5.10/070-v5.17-phy-bcm-ns-usb2-support-updated-DT-binding-with-PHY-.patch
new file mode 100644
index 0000000000..464849bc69
--- /dev/null
+++ b/target/linux/bcm53xx/patches-5.10/070-v5.17-phy-bcm-ns-usb2-support-updated-DT-binding-with-PHY-.patch
@@ -0,0 +1,131 @@
+From d3bc6269e21fc474763708e79c7a118740befb94 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
+Date: Tue, 26 Oct 2021 11:37:16 +0200
+Subject: [PATCH] phy: bcm-ns-usb2: support updated DT binding with PHY reg
+ space
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Updated DT binding maps just a PHY's register space instead of the whole
+DMU block. Accessing a common CRU reg is handled using syscon &
+regmap.
+
+The old binding has been deprecated and remains supported as a fallback
+method.
+
+Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
+Link: https://lore.kernel.org/r/20211026093716.5567-1-zajec5@gmail.com
+Signed-off-by: Vinod Koul <vkoul@kernel.org>
+---
+ drivers/phy/broadcom/phy-bcm-ns-usb2.c | 52 +++++++++++++++++++++-----
+ 1 file changed, 43 insertions(+), 9 deletions(-)
+
+--- a/drivers/phy/broadcom/phy-bcm-ns-usb2.c
++++ b/drivers/phy/broadcom/phy-bcm-ns-usb2.c
+@@ -9,17 +9,23 @@
+ #include <linux/clk.h>
+ #include <linux/delay.h>
+ #include <linux/err.h>
++#include <linux/mfd/syscon.h>
+ #include <linux/module.h>
+ #include <linux/of_address.h>
+ #include <linux/of_platform.h>
+ #include <linux/phy/phy.h>
+ #include <linux/platform_device.h>
++#include <linux/regmap.h>
+ #include <linux/slab.h>
+ 
+ struct bcm_ns_usb2 {
+ 	struct device *dev;
+ 	struct clk *ref_clk;
+ 	struct phy *phy;
++	struct regmap *clkset;
++	void __iomem *base;
++
++	/* Deprecated binding */
+ 	void __iomem *dmu;
+ };
+ 
+@@ -27,7 +33,6 @@ static int bcm_ns_usb2_phy_init(struct p
+ {
+ 	struct bcm_ns_usb2 *usb2 = phy_get_drvdata(phy);
+ 	struct device *dev = usb2->dev;
+-	void __iomem *dmu = usb2->dmu;
+ 	u32 ref_clk_rate, usb2ctl, usb_pll_ndiv, usb_pll_pdiv;
+ 	int err = 0;
+ 
+@@ -44,7 +49,10 @@ static int bcm_ns_usb2_phy_init(struct p
+ 		goto err_clk_off;
+ 	}
+ 
+-	usb2ctl = readl(dmu + BCMA_DMU_CRU_USB2_CONTROL);
++	if (usb2->base)
++		usb2ctl = readl(usb2->base);
++	else
++		usb2ctl = readl(usb2->dmu + BCMA_DMU_CRU_USB2_CONTROL);
+ 
+ 	if (usb2ctl & BCMA_DMU_CRU_USB2_CONTROL_USB_PLL_PDIV_MASK) {
+ 		usb_pll_pdiv = usb2ctl;
+@@ -58,15 +66,24 @@ static int bcm_ns_usb2_phy_init(struct p
+ 	usb_pll_ndiv = (1920000000 * usb_pll_pdiv) / ref_clk_rate;
+ 
+ 	/* Unlock DMU PLL settings with some magic value */
+-	writel(0x0000ea68, dmu + BCMA_DMU_CRU_CLKSET_KEY);
++	if (usb2->clkset)
++		regmap_write(usb2->clkset, 0, 0x0000ea68);
++	else
++		writel(0x0000ea68, usb2->dmu + BCMA_DMU_CRU_CLKSET_KEY);
+ 
+ 	/* Write USB 2.0 PLL control setting */
+ 	usb2ctl &= ~BCMA_DMU_CRU_USB2_CONTROL_USB_PLL_NDIV_MASK;
+ 	usb2ctl |= usb_pll_ndiv << BCMA_DMU_CRU_USB2_CONTROL_USB_PLL_NDIV_SHIFT;
+-	writel(usb2ctl, dmu + BCMA_DMU_CRU_USB2_CONTROL);
++	if (usb2->base)
++		writel(usb2ctl, usb2->base);
++	else
++		writel(usb2ctl, usb2->dmu + BCMA_DMU_CRU_USB2_CONTROL);
+ 
+ 	/* Lock DMU PLL settings */
+-	writel(0x00000000, dmu + BCMA_DMU_CRU_CLKSET_KEY);
++	if (usb2->clkset)
++		regmap_write(usb2->clkset, 0, 0x00000000);
++	else
++		writel(0x00000000, usb2->dmu + BCMA_DMU_CRU_CLKSET_KEY);
+ 
+ err_clk_off:
+ 	clk_disable_unprepare(usb2->ref_clk);
+@@ -91,11 +108,28 @@ static int bcm_ns_usb2_probe(struct plat
+ 		return -ENOMEM;
+ 	usb2->dev = dev;
+ 
+-	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dmu");
+-	usb2->dmu = devm_ioremap_resource(dev, res);
+-	if (IS_ERR(usb2->dmu)) {
+-		dev_err(dev, "Failed to map DMU regs\n");
+-		return PTR_ERR(usb2->dmu);
++	if (of_find_property(dev->of_node, "brcm,syscon-clkset", NULL)) {
++		usb2->base = devm_platform_ioremap_resource(pdev, 0);
++		if (IS_ERR(usb2->base)) {
++			dev_err(dev, "Failed to map control reg\n");
++			return PTR_ERR(usb2->base);
++		}
++
++		usb2->clkset = syscon_regmap_lookup_by_phandle(dev->of_node,
++							       "brcm,syscon-clkset");
++		if (IS_ERR(usb2->clkset)) {
++			dev_err(dev, "Failed to lookup clkset regmap\n");
++			return PTR_ERR(usb2->clkset);
++		}
++	} else {
++		res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dmu");
++		usb2->dmu = devm_ioremap_resource(dev, res);
++		if (IS_ERR(usb2->dmu)) {
++			dev_err(dev, "Failed to map DMU regs\n");
++			return PTR_ERR(usb2->dmu);
++		}
++
++		dev_warn(dev, "using deprecated DT binding\n");
+ 	}
+ 
+ 	usb2->ref_clk = devm_clk_get(dev, "phy-ref-clk");