/** * ulpi.c - DesignWare USB3 Controller's ULPI PHY interface * * Copyright (C) 2015 Intel Corporation * * Author: Heikki Krogerus * * 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 #include "core.h" #include "io.h" #define DWC3_ULPI_ADDR(a) \ ((a >= ULPI_EXT_VENDOR_SPECIFIC) ? \ DWC3_GUSB2PHYACC_ADDR(ULPI_ACCESS_EXTENDED) | \ DWC3_GUSB2PHYACC_EXTEND_ADDR(a) : DWC3_GUSB2PHYACC_ADDR(a)) static int dwc3_ulpi_busyloop(struct dwc3 *dwc) { unsigned count = 1000; u32 reg; while (count--) { reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYACC(0)); if (!(reg & DWC3_GUSB2PHYACC_BUSY)) return 0; cpu_relax(); } return -ETIMEDOUT; } static int dwc3_ulpi_read(struct device *dev, u8 addr) { struct dwc3 *dwc = dev_get_drvdata(dev); u32 reg; int ret; reg = DWC3_GUSB2PHYACC_NEWREGREQ | DWC3_ULPI_ADDR(addr); dwc3_writel(dwc->regs, DWC3_GUSB2PHYACC(0), reg); ret = dwc3_ulpi_busyloop(dwc); if (ret) return ret; reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYACC(0)); return DWC3_GUSB2PHYACC_DATA(reg); } static int dwc3_ulpi_write(struct device *dev, u8 addr, u8 val) { struct dwc3 *dwc = dev_get_drvdata(dev); u32 reg; reg = DWC3_GUSB2PHYACC_NEWREGREQ | DWC3_ULPI_ADDR(addr); reg |= DWC3_GUSB2PHYACC_WRITE | val; dwc3_writel(dwc->regs, DWC3_GUSB2PHYACC(0), reg); return dwc3_ulpi_busyloop(dwc); } static const struct ulpi_ops dwc3_ulpi_ops = { .read = dwc3_ulpi_read, .write = dwc3_ulpi_write, }; int dwc3_ulpi_init(struct dwc3 *dwc) { /* Register the interface */ dwc->ulpi = ulpi_register_interface(dwc->dev, &dwc3_ulpi_ops); if (IS_ERR(dwc->ulpi)) { dev_err(dwc->dev, "failed to register ULPI interface"); return PTR_ERR(dwc->ulpi); } return 0; } void dwc3_ulpi_exit(struct dwc3 *dwc) { if (dwc->ulpi) { ulpi_unregister_interface(dwc->ulpi); dwc->ulpi = NULL; } } it/commit/sound/firewire?h=nds-private-remove&id=a5ef01aaac245d37edf113d65b0c146e96d841d1'>commitdiff
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authorTobias Klauser <tklauser@distanz.ch>2017-01-10 15:02:07 +0100
committerDavid S. Miller <davem@davemloft.net>2017-01-10 21:00:59 -0500
commita5ef01aaac245d37edf113d65b0c146e96d841d1 (patch)
treec6a1d6e8a14ce1fb22226ba2c5c774b6a9ee4006 /sound/firewire
parentda36e13cf653541e385a8d2ec2637fff6ea3461a (diff)
bpf: Remove unused but set variable in __bpf_lru_list_shrink_inactive()
Remove the unused but set variable 'first_node' in __bpf_lru_list_shrink_inactive() to fix the following GCC warning when building with 'W=1': kernel/bpf/bpf_lru_list.c:216:41: warning: variable ‘first_node’ set but not used [-Wunused-but-set-variable] Cc: Martin KaFai Lau <kafai@fb.com> Signed-off-by: Tobias Klauser <tklauser@distanz.ch> Acked-by: Martin KaFai Lau <kafai@fb.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'sound/firewire')