diff options
Diffstat (limited to 'drivers/phy/broadcom/phy-bcm-ns-usb2.c')
| -rw-r--r-- | drivers/phy/broadcom/phy-bcm-ns-usb2.c | 41 |
1 files changed, 23 insertions, 18 deletions
diff --git a/drivers/phy/broadcom/phy-bcm-ns-usb2.c b/drivers/phy/broadcom/phy-bcm-ns-usb2.c index 58dff80e9386..c5d35031b398 100644 --- a/drivers/phy/broadcom/phy-bcm-ns-usb2.c +++ b/drivers/phy/broadcom/phy-bcm-ns-usb2.c @@ -1,37 +1,35 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Broadcom Northstar USB 2.0 PHY Driver * * Copyright (C) 2016 Rafał Miłecki <zajec5@gmail.com> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * */ #include <linux/bcma/bcma.h> #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; - void __iomem *dmu; + struct regmap *clkset; + void __iomem *base; }; static int bcm_ns_usb2_phy_init(struct phy *phy) { 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; @@ -48,7 +46,7 @@ static int bcm_ns_usb2_phy_init(struct phy *phy) goto err_clk_off; } - usb2ctl = readl(dmu + BCMA_DMU_CRU_USB2_CONTROL); + usb2ctl = readl(usb2->base); if (usb2ctl & BCMA_DMU_CRU_USB2_CONTROL_USB_PLL_PDIV_MASK) { usb_pll_pdiv = usb2ctl; @@ -62,15 +60,16 @@ static int bcm_ns_usb2_phy_init(struct phy *phy) 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); + regmap_write(usb2->clkset, 0, 0x0000ea68); /* 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); + + writel(usb2ctl, usb2->base); /* Lock DMU PLL settings */ - writel(0x00000000, dmu + BCMA_DMU_CRU_CLKSET_KEY); + regmap_write(usb2->clkset, 0, 0x00000000); err_clk_off: clk_disable_unprepare(usb2->ref_clk); @@ -87,7 +86,6 @@ static int bcm_ns_usb2_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct bcm_ns_usb2 *usb2; - struct resource *res; struct phy_provider *phy_provider; usb2 = devm_kzalloc(&pdev->dev, sizeof(*usb2), GFP_KERNEL); @@ -95,16 +93,22 @@ static int bcm_ns_usb2_probe(struct platform_device *pdev) 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); + 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); } usb2->ref_clk = devm_clk_get(dev, "phy-ref-clk"); if (IS_ERR(usb2->ref_clk)) { - dev_err(dev, "Clock not defined\n"); + dev_err_probe(dev, PTR_ERR(usb2->ref_clk), "failed to get ref clk\n"); return PTR_ERR(usb2->ref_clk); } @@ -134,4 +138,5 @@ static struct platform_driver bcm_ns_usb2_driver = { }; module_platform_driver(bcm_ns_usb2_driver); +MODULE_DESCRIPTION("Broadcom Northstar USB 2.0 PHY Driver"); MODULE_LICENSE("GPL v2"); |