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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * QE USB routines4 *5 * Copyright 2006 Freescale Semiconductor, Inc.6 * Shlomi Gridish <gridish@freescale.com>7 * Jerry Huang <Chang-Ming.Huang@freescale.com>8 * Copyright (c) MontaVista Software, Inc. 2008.9 * Anton Vorontsov <avorontsov@ru.mvista.com>10 */11 12#include <linux/kernel.h>13#include <linux/errno.h>14#include <linux/export.h>15#include <linux/io.h>16#include <soc/fsl/qe/immap_qe.h>17#include <soc/fsl/qe/qe.h>18 19int qe_usb_clock_set(enum qe_clock clk, int rate)20{21 struct qe_mux __iomem *mux = &qe_immr->qmx;22 unsigned long flags;23 u32 val;24 25 switch (clk) {26 case QE_CLK3: val = QE_CMXGCR_USBCS_CLK3; break;27 case QE_CLK5: val = QE_CMXGCR_USBCS_CLK5; break;28 case QE_CLK7: val = QE_CMXGCR_USBCS_CLK7; break;29 case QE_CLK9: val = QE_CMXGCR_USBCS_CLK9; break;30 case QE_CLK13: val = QE_CMXGCR_USBCS_CLK13; break;31 case QE_CLK17: val = QE_CMXGCR_USBCS_CLK17; break;32 case QE_CLK19: val = QE_CMXGCR_USBCS_CLK19; break;33 case QE_CLK21: val = QE_CMXGCR_USBCS_CLK21; break;34 case QE_BRG9: val = QE_CMXGCR_USBCS_BRG9; break;35 case QE_BRG10: val = QE_CMXGCR_USBCS_BRG10; break;36 default:37 pr_err("%s: requested unknown clock %d\n", __func__, clk);38 return -EINVAL;39 }40 41 if (qe_clock_is_brg(clk))42 qe_setbrg(clk, rate, 1);43 44 spin_lock_irqsave(&cmxgcr_lock, flags);45 46 qe_clrsetbits_be32(&mux->cmxgcr, QE_CMXGCR_USBCS, val);47 48 spin_unlock_irqrestore(&cmxgcr_lock, flags);49 50 return 0;51}52EXPORT_SYMBOL(qe_usb_clock_set);53