phy: usb: phy-brcm-usb: Add Broadcom STB USB phy driver
Add a new USB Phy driver for Broadcom STB SoCs. This driver supports Broadcom STB ARM SoCs. This driver in combination with the Broadcom STB ohci, ehci and xhci drivers will enable USB1.1, USB2.0 and USB3.0 support. This Phy driver also supports the Broadcom BDC gadget driver. Signed-off-by: Al Cooper <alcooperx@gmail.com> Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
This commit is contained in:
Al Cooper
Kishon Vijay Abraham I
parent
7a08c4d514
commit
49859e55e3
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@ -2885,6 +2885,13 @@ S: Supported
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F: drivers/gpio/gpio-brcmstb.c
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F: drivers/gpio/gpio-brcmstb.c
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F: Documentation/devicetree/bindings/gpio/brcm,brcmstb-gpio.txt
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F: Documentation/devicetree/bindings/gpio/brcm,brcmstb-gpio.txt
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BROADCOM BRCMSTB USB2 and USB3 PHY DRIVER
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M: Al Cooper <alcooperx@gmail.com>
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L: linux-kernel@vger.kernel.org
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L: bcm-kernel-feedback-list@broadcom.com
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S: Maintained
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F: drivers/phy/broadcom/phy-brcm-usb*
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BROADCOM GENET ETHERNET DRIVER
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BROADCOM GENET ETHERNET DRIVER
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M: Florian Fainelli <f.fainelli@gmail.com>
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M: Florian Fainelli <f.fainelli@gmail.com>
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L: netdev@vger.kernel.org
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L: netdev@vger.kernel.org
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@ -67,3 +67,16 @@ config PHY_BRCM_SATA
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help
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help
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Enable this to support the Broadcom SATA PHY.
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Enable this to support the Broadcom SATA PHY.
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If unsure, say N.
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If unsure, say N.
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config PHY_BRCM_USB
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tristate "Broadcom STB USB PHY driver"
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depends on ARCH_BRCMSTB
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depends on OF
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select GENERIC_PHY
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select SOC_BRCMSTB
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default ARCH_BRCMSTB
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help
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Enable this to support the Broadcom STB USB PHY.
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This driver is required by the USB XHCI, EHCI and OHCI
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drivers.
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If unsure, say N.
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@ -5,3 +5,6 @@ obj-$(CONFIG_PHY_BCM_NS_USB3) += phy-bcm-ns-usb3.o
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obj-$(CONFIG_PHY_NS2_PCIE) += phy-bcm-ns2-pcie.o
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obj-$(CONFIG_PHY_NS2_PCIE) += phy-bcm-ns2-pcie.o
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obj-$(CONFIG_PHY_NS2_USB_DRD) += phy-bcm-ns2-usbdrd.o
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obj-$(CONFIG_PHY_NS2_USB_DRD) += phy-bcm-ns2-usbdrd.o
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obj-$(CONFIG_PHY_BRCM_SATA) += phy-brcm-sata.o
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obj-$(CONFIG_PHY_BRCM_SATA) += phy-brcm-sata.o
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obj-$(CONFIG_PHY_BRCM_USB) += phy-brcm-usb-dvr.o
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phy-brcm-usb-dvr-objs := phy-brcm-usb.o phy-brcm-usb-init.o
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File diff suppressed because it is too large
Load Diff
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@ -0,0 +1,50 @@
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/*
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* Copyright (C) 2014-2017 Broadcom
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#ifndef _USB_BRCM_COMMON_INIT_H
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#define _USB_BRCM_COMMON_INIT_H
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#define USB_CTLR_MODE_HOST 0
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#define USB_CTLR_MODE_DEVICE 1
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#define USB_CTLR_MODE_DRD 2
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#define USB_CTLR_MODE_TYPEC_PD 3
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struct brcm_usb_init_params;
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struct brcm_usb_init_params {
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void __iomem *ctrl_regs;
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void __iomem *xhci_ec_regs;
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int ioc;
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int ipp;
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int mode;
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u32 family_id;
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u32 product_id;
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int selected_family;
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const char *family_name;
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const u32 *usb_reg_bits_map;
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};
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void brcm_usb_set_family_map(struct brcm_usb_init_params *params);
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int brcm_usb_init_get_dual_select(struct brcm_usb_init_params *params);
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void brcm_usb_init_set_dual_select(struct brcm_usb_init_params *params,
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int mode);
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void brcm_usb_init_ipp(struct brcm_usb_init_params *ini);
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void brcm_usb_init_common(struct brcm_usb_init_params *ini);
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void brcm_usb_init_eohci(struct brcm_usb_init_params *ini);
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void brcm_usb_init_xhci(struct brcm_usb_init_params *ini);
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void brcm_usb_uninit_common(struct brcm_usb_init_params *ini);
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void brcm_usb_uninit_eohci(struct brcm_usb_init_params *ini);
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void brcm_usb_uninit_xhci(struct brcm_usb_init_params *ini);
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#endif /* _USB_BRCM_COMMON_INIT_H */
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@ -0,0 +1,374 @@
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/*
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* phy-brcm-usb.c - Broadcom USB Phy Driver
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*
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* Copyright (C) 2015-2017 Broadcom
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/clk.h>
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#include <linux/delay.h>
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#include <linux/err.h>
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#include <linux/io.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/phy/phy.h>
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#include <linux/platform_device.h>
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#include <linux/interrupt.h>
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#include <linux/soc/brcmstb/brcmstb.h>
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#include <dt-bindings/phy/phy.h>
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#include "phy-brcm-usb-init.h"
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enum brcm_usb_phy_id {
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BRCM_USB_PHY_2_0 = 0,
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BRCM_USB_PHY_3_0,
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BRCM_USB_PHY_ID_MAX
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};
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struct value_to_name_map {
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int value;
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const char *name;
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};
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static struct value_to_name_map brcm_dr_mode_to_name[] = {
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{ USB_CTLR_MODE_HOST, "host" },
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{ USB_CTLR_MODE_DEVICE, "peripheral" },
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{ USB_CTLR_MODE_DRD, "drd" },
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{ USB_CTLR_MODE_TYPEC_PD, "typec-pd" }
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};
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struct brcm_usb_phy {
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struct phy *phy;
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unsigned int id;
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bool inited;
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};
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struct brcm_usb_phy_data {
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struct brcm_usb_init_params ini;
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bool has_eohci;
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bool has_xhci;
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struct clk *usb_20_clk;
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struct clk *usb_30_clk;
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struct mutex mutex; /* serialize phy init */
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int init_count;
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struct brcm_usb_phy phys[BRCM_USB_PHY_ID_MAX];
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};
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static int brcm_usb_phy_init(struct phy *gphy)
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{
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struct brcm_usb_phy *phy = phy_get_drvdata(gphy);
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struct brcm_usb_phy_data *priv =
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container_of(phy, struct brcm_usb_phy_data, phys[phy->id]);
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/*
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* Use a lock to make sure a second caller waits until
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* the base phy is inited before using it.
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*/
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mutex_lock(&priv->mutex);
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if (priv->init_count++ == 0) {
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clk_enable(priv->usb_20_clk);
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clk_enable(priv->usb_30_clk);
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brcm_usb_init_common(&priv->ini);
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}
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mutex_unlock(&priv->mutex);
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if (phy->id == BRCM_USB_PHY_2_0)
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brcm_usb_init_eohci(&priv->ini);
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else if (phy->id == BRCM_USB_PHY_3_0)
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brcm_usb_init_xhci(&priv->ini);
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phy->inited = true;
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dev_dbg(&gphy->dev, "INIT, id: %d, total: %d\n", phy->id,
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priv->init_count);
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return 0;
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}
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static int brcm_usb_phy_exit(struct phy *gphy)
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{
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struct brcm_usb_phy *phy = phy_get_drvdata(gphy);
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struct brcm_usb_phy_data *priv =
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container_of(phy, struct brcm_usb_phy_data, phys[phy->id]);
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dev_dbg(&gphy->dev, "EXIT\n");
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if (phy->id == BRCM_USB_PHY_2_0)
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brcm_usb_uninit_eohci(&priv->ini);
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if (phy->id == BRCM_USB_PHY_3_0)
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brcm_usb_uninit_xhci(&priv->ini);
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/* If both xhci and eohci are gone, reset everything else */
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mutex_lock(&priv->mutex);
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if (--priv->init_count == 0) {
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brcm_usb_uninit_common(&priv->ini);
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clk_disable(priv->usb_20_clk);
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clk_disable(priv->usb_30_clk);
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}
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mutex_unlock(&priv->mutex);
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phy->inited = false;
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return 0;
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}
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static struct phy_ops brcm_usb_phy_ops = {
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.init = brcm_usb_phy_init,
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.exit = brcm_usb_phy_exit,
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.owner = THIS_MODULE,
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};
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static struct phy *brcm_usb_phy_xlate(struct device *dev,
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struct of_phandle_args *args)
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{
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struct brcm_usb_phy_data *data = dev_get_drvdata(dev);
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/*
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* values 0 and 1 are for backward compatibility with
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* device tree nodes from older bootloaders.
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*/
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switch (args->args[0]) {
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case 0:
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case PHY_TYPE_USB2:
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if (data->phys[BRCM_USB_PHY_2_0].phy)
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return data->phys[BRCM_USB_PHY_2_0].phy;
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dev_warn(dev, "Error, 2.0 Phy not found\n");
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break;
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case 1:
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case PHY_TYPE_USB3:
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if (data->phys[BRCM_USB_PHY_3_0].phy)
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return data->phys[BRCM_USB_PHY_3_0].phy;
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dev_warn(dev, "Error, 3.0 Phy not found\n");
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break;
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}
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return ERR_PTR(-ENODEV);
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}
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static int name_to_value(struct value_to_name_map *table, int count,
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const char *name, int *value)
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{
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int x;
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*value = 0;
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for (x = 0; x < count; x++) {
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if (sysfs_streq(name, table[x].name)) {
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*value = x;
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return 0;
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}
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}
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return -EINVAL;
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}
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static int brcm_usb_phy_dvr_init(struct device *dev,
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struct brcm_usb_phy_data *priv,
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struct device_node *dn)
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{
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struct phy *gphy;
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int err;
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priv->usb_20_clk = of_clk_get_by_name(dn, "sw_usb");
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if (IS_ERR(priv->usb_20_clk)) {
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dev_info(dev, "Clock not found in Device Tree\n");
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priv->usb_20_clk = NULL;
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}
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err = clk_prepare_enable(priv->usb_20_clk);
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if (err)
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return err;
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if (priv->has_eohci) {
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gphy = devm_phy_create(dev, NULL, &brcm_usb_phy_ops);
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if (IS_ERR(gphy)) {
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dev_err(dev, "failed to create EHCI/OHCI PHY\n");
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return PTR_ERR(gphy);
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}
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priv->phys[BRCM_USB_PHY_2_0].phy = gphy;
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priv->phys[BRCM_USB_PHY_2_0].id = BRCM_USB_PHY_2_0;
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phy_set_drvdata(gphy, &priv->phys[BRCM_USB_PHY_2_0]);
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}
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if (priv->has_xhci) {
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gphy = devm_phy_create(dev, NULL, &brcm_usb_phy_ops);
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if (IS_ERR(gphy)) {
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dev_err(dev, "failed to create XHCI PHY\n");
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return PTR_ERR(gphy);
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}
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priv->phys[BRCM_USB_PHY_3_0].phy = gphy;
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priv->phys[BRCM_USB_PHY_3_0].id = BRCM_USB_PHY_3_0;
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phy_set_drvdata(gphy, &priv->phys[BRCM_USB_PHY_3_0]);
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priv->usb_30_clk = of_clk_get_by_name(dn, "sw_usb3");
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if (IS_ERR(priv->usb_30_clk)) {
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dev_info(dev,
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"USB3.0 clock not found in Device Tree\n");
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priv->usb_30_clk = NULL;
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}
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err = clk_prepare_enable(priv->usb_30_clk);
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if (err)
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return err;
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}
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return 0;
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}
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static int brcm_usb_phy_probe(struct platform_device *pdev)
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{
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struct resource *res;
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struct device *dev = &pdev->dev;
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struct brcm_usb_phy_data *priv;
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struct phy_provider *phy_provider;
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struct device_node *dn = pdev->dev.of_node;
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int err;
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const char *mode;
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priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
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if (!priv)
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return -ENOMEM;
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platform_set_drvdata(pdev, priv);
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priv->ini.family_id = brcmstb_get_family_id();
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priv->ini.product_id = brcmstb_get_product_id();
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brcm_usb_set_family_map(&priv->ini);
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dev_dbg(dev, "Best mapping table is for %s\n",
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priv->ini.family_name);
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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if (!res) {
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dev_err(dev, "can't get USB_CTRL base address\n");
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return -EINVAL;
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}
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priv->ini.ctrl_regs = devm_ioremap_resource(dev, res);
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if (IS_ERR(priv->ini.ctrl_regs)) {
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dev_err(dev, "can't map CTRL register space\n");
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return -EINVAL;
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}
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/* The XHCI EC registers are optional */
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res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
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if (res) {
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priv->ini.xhci_ec_regs =
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devm_ioremap_resource(dev, res);
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if (IS_ERR(priv->ini.xhci_ec_regs)) {
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dev_err(dev, "can't map XHCI EC register space\n");
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return -EINVAL;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
of_property_read_u32(dn, "brcm,ipp", &priv->ini.ipp);
|
||||||
|
of_property_read_u32(dn, "brcm,ioc", &priv->ini.ioc);
|
||||||
|
|
||||||
|
priv->ini.mode = USB_CTLR_MODE_HOST;
|
||||||
|
err = of_property_read_string(dn, "dr_mode", &mode);
|
||||||
|
if (err == 0) {
|
||||||
|
name_to_value(&brcm_dr_mode_to_name[0],
|
||||||
|
ARRAY_SIZE(brcm_dr_mode_to_name),
|
||||||
|
mode, &priv->ini.mode);
|
||||||
|
}
|
||||||
|
if (of_property_read_bool(dn, "brcm,has_xhci"))
|
||||||
|
priv->has_xhci = true;
|
||||||
|
if (of_property_read_bool(dn, "brcm,has_eohci"))
|
||||||
|
priv->has_eohci = true;
|
||||||
|
|
||||||
|
err = brcm_usb_phy_dvr_init(dev, priv, dn);
|
||||||
|
if (err)
|
||||||
|
return err;
|
||||||
|
|
||||||
|
mutex_init(&priv->mutex);
|
||||||
|
|
||||||
|
/* make sure invert settings are correct */
|
||||||
|
brcm_usb_init_ipp(&priv->ini);
|
||||||
|
|
||||||
|
/* start with everything off */
|
||||||
|
if (priv->has_xhci)
|
||||||
|
brcm_usb_uninit_xhci(&priv->ini);
|
||||||
|
if (priv->has_eohci)
|
||||||
|
brcm_usb_uninit_eohci(&priv->ini);
|
||||||
|
brcm_usb_uninit_common(&priv->ini);
|
||||||
|
clk_disable(priv->usb_20_clk);
|
||||||
|
clk_disable(priv->usb_30_clk);
|
||||||
|
|
||||||
|
phy_provider = devm_of_phy_provider_register(dev, brcm_usb_phy_xlate);
|
||||||
|
if (IS_ERR(phy_provider))
|
||||||
|
return PTR_ERR(phy_provider);
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
#ifdef CONFIG_PM_SLEEP
|
||||||
|
static int brcm_usb_phy_suspend(struct device *dev)
|
||||||
|
{
|
||||||
|
struct brcm_usb_phy_data *priv = dev_get_drvdata(dev);
|
||||||
|
|
||||||
|
if (priv->init_count) {
|
||||||
|
clk_disable(priv->usb_20_clk);
|
||||||
|
clk_disable(priv->usb_30_clk);
|
||||||
|
}
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int brcm_usb_phy_resume(struct device *dev)
|
||||||
|
{
|
||||||
|
struct brcm_usb_phy_data *priv = dev_get_drvdata(dev);
|
||||||
|
|
||||||
|
clk_enable(priv->usb_20_clk);
|
||||||
|
clk_enable(priv->usb_30_clk);
|
||||||
|
brcm_usb_init_ipp(&priv->ini);
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Initialize anything that was previously initialized.
|
||||||
|
* Uninitialize anything that wasn't previously initialized.
|
||||||
|
*/
|
||||||
|
if (priv->init_count) {
|
||||||
|
brcm_usb_init_common(&priv->ini);
|
||||||
|
if (priv->phys[BRCM_USB_PHY_2_0].inited) {
|
||||||
|
brcm_usb_init_eohci(&priv->ini);
|
||||||
|
} else if (priv->has_eohci) {
|
||||||
|
brcm_usb_uninit_eohci(&priv->ini);
|
||||||
|
clk_disable(priv->usb_20_clk);
|
||||||
|
}
|
||||||
|
if (priv->phys[BRCM_USB_PHY_3_0].inited) {
|
||||||
|
brcm_usb_init_xhci(&priv->ini);
|
||||||
|
} else if (priv->has_xhci) {
|
||||||
|
brcm_usb_uninit_xhci(&priv->ini);
|
||||||
|
clk_disable(priv->usb_30_clk);
|
||||||
|
}
|
||||||
|
} else {
|
||||||
|
if (priv->has_xhci)
|
||||||
|
brcm_usb_uninit_xhci(&priv->ini);
|
||||||
|
if (priv->has_eohci)
|
||||||
|
brcm_usb_uninit_eohci(&priv->ini);
|
||||||
|
brcm_usb_uninit_common(&priv->ini);
|
||||||
|
clk_disable(priv->usb_20_clk);
|
||||||
|
clk_disable(priv->usb_30_clk);
|
||||||
|
}
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
#endif /* CONFIG_PM_SLEEP */
|
||||||
|
|
||||||
|
static const struct dev_pm_ops brcm_usb_phy_pm_ops = {
|
||||||
|
SET_LATE_SYSTEM_SLEEP_PM_OPS(brcm_usb_phy_suspend, brcm_usb_phy_resume)
|
||||||
|
};
|
||||||
|
|
||||||
|
static const struct of_device_id brcm_usb_dt_ids[] = {
|
||||||
|
{ .compatible = "brcm,brcmstb-usb-phy" },
|
||||||
|
{ /* sentinel */ }
|
||||||
|
};
|
||||||
|
|
||||||
|
MODULE_DEVICE_TABLE(of, brcm_usb_dt_ids);
|
||||||
|
|
||||||
|
static struct platform_driver brcm_usb_driver = {
|
||||||
|
.probe = brcm_usb_phy_probe,
|
||||||
|
.driver = {
|
||||||
|
.name = "brcmstb-usb-phy",
|
||||||
|
.owner = THIS_MODULE,
|
||||||
|
.pm = &brcm_usb_phy_pm_ops,
|
||||||
|
.of_match_table = brcm_usb_dt_ids,
|
||||||
|
},
|
||||||
|
};
|
||||||
|
|
||||||
|
module_platform_driver(brcm_usb_driver);
|
||||||
|
|
||||||
|
MODULE_ALIAS("platform:brcmstb-usb-phy");
|
||||||
|
MODULE_AUTHOR("Al Cooper <acooper@broadcom.com>");
|
||||||
|
MODULE_DESCRIPTION("BRCM USB PHY driver");
|
||||||
|
MODULE_LICENSE("GPL v2");
|
||||||
Loading…
Reference in New Issue