1// SPDX-License-Identifier: GPL-2.0-or-later 2/* 3 * QE USB routines 4 * 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