diff options
Diffstat (limited to 'drivers/net/irda/sh_irda.c')
| -rw-r--r-- | drivers/net/irda/sh_irda.c | 875 |
1 files changed, 0 insertions, 875 deletions
diff --git a/drivers/net/irda/sh_irda.c b/drivers/net/irda/sh_irda.c deleted file mode 100644 index c96b46b2c3a8..000000000000 --- a/drivers/net/irda/sh_irda.c +++ /dev/null @@ -1,875 +0,0 @@ -/* - * SuperH IrDA Driver - * - * Copyright (C) 2010 Renesas Solutions Corp. - * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> - * - * Based on sh_sir.c - * Copyright (C) 2009 Renesas Solutions Corp. - * Copyright 2006-2009 Analog Devices Inc. - * - * 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. - */ - -/* - * CAUTION - * - * This driver is very simple. - * So, it doesn't have below support now - * - MIR/FIR support - * - DMA transfer support - * - FIFO mode support - */ -#include <linux/io.h> -#include <linux/interrupt.h> -#include <linux/module.h> -#include <linux/platform_device.h> -#include <linux/pm_runtime.h> -#include <linux/clk.h> -#include <net/irda/wrapper.h> -#include <net/irda/irda_device.h> - -#define DRIVER_NAME "sh_irda" - -#define __IRDARAM_LEN 0x1039 - -#define IRTMR 0x1F00 /* Transfer mode */ -#define IRCFR 0x1F02 /* Configuration */ -#define IRCTR 0x1F04 /* IR control */ -#define IRTFLR 0x1F20 /* Transmit frame length */ -#define IRTCTR 0x1F22 /* Transmit control */ -#define IRRFLR 0x1F40 /* Receive frame length */ -#define IRRCTR 0x1F42 /* Receive control */ -#define SIRISR 0x1F60 /* SIR-UART mode interrupt source */ -#define SIRIMR 0x1F62 /* SIR-UART mode interrupt mask */ -#define SIRICR 0x1F64 /* SIR-UART mode interrupt clear */ -#define SIRBCR 0x1F68 /* SIR-UART mode baud rate count */ -#define MFIRISR 0x1F70 /* MIR/FIR mode interrupt source */ -#define MFIRIMR 0x1F72 /* MIR/FIR mode interrupt mask */ -#define MFIRICR 0x1F74 /* MIR/FIR mode interrupt clear */ -#define CRCCTR 0x1F80 /* CRC engine control */ -#define CRCIR 0x1F86 /* CRC engine input data */ -#define CRCCR 0x1F8A /* CRC engine calculation */ -#define CRCOR 0x1F8E /* CRC engine output data */ -#define FIFOCP 0x1FC0 /* FIFO current pointer */ -#define FIFOFP 0x1FC2 /* FIFO follow pointer */ -#define FIFORSMSK 0x1FC4 /* FIFO receive status mask */ -#define FIFORSOR 0x1FC6 /* FIFO receive status OR */ -#define FIFOSEL 0x1FC8 /* FIFO select */ -#define FIFORS 0x1FCA /* FIFO receive status */ -#define FIFORFL 0x1FCC /* FIFO receive frame length */ -#define FIFORAMCP 0x1FCE /* FIFO RAM current pointer */ -#define FIFORAMFP 0x1FD0 /* FIFO RAM follow pointer */ -#define BIFCTL 0x1FD2 /* BUS interface control */ -#define IRDARAM 0x0000 /* IrDA buffer RAM */ -#define IRDARAM_LEN __IRDARAM_LEN /* - 8/16/32 (read-only for 32) */ - -/* IRTMR */ -#define TMD_MASK (0x3 << 14) /* Transfer Mode */ -#define TMD_SIR (0x0 << 14) -#define TMD_MIR (0x3 << 14) -#define TMD_FIR (0x2 << 14) - -#define FIFORIM (1 << 8) /* FIFO receive interrupt mask */ -#define MIM (1 << 4) /* MIR/FIR Interrupt Mask */ -#define SIM (1 << 0) /* SIR Interrupt Mask */ -#define xIM_MASK (FIFORIM | MIM | SIM) - -/* IRCFR */ -#define RTO_SHIFT 8 /* shift for Receive Timeout */ -#define RTO (0x3 << RTO_SHIFT) - -/* IRTCTR */ -#define ARMOD (1 << 15) /* Auto-Receive Mode */ -#define TE (1 << 0) /* Transmit Enable */ - -/* IRRFLR */ -#define RFL_MASK (0x1FFF) /* mask for Receive Frame Length */ - -/* IRRCTR */ -#define RE (1 << 0) /* Receive Enable */ - -/* - * SIRISR, SIRIMR, SIRICR, - * MFIRISR, MFIRIMR, MFIRICR - */ -#define FRE (1 << 15) /* Frame Receive End */ -#define TROV (1 << 11) /* Transfer Area Overflow */ -#define xIR_9 (1 << 9) -#define TOT xIR_9 /* for SIR Timeout */ -#define ABTD xIR_9 /* for MIR/FIR Abort Detection */ -#define xIR_8 (1 << 8) -#define FER xIR_8 /* for SIR Framing Error */ -#define CRCER xIR_8 /* for MIR/FIR CRC error */ -#define FTE (1 << 7) /* Frame Transmit End */ -#define xIR_MASK (FRE | TROV | xIR_9 | xIR_8 | FTE) - -/* SIRBCR */ -#define BRC_MASK (0x3F) /* mask for Baud Rate Count */ - -/* CRCCTR */ -#define CRC_RST (1 << 15) /* CRC Engine Reset */ -#define CRC_CT_MASK 0x0FFF /* mask for CRC Engine Input Data Count */ - -/* CRCIR */ -#define CRC_IN_MASK 0x0FFF /* mask for CRC Engine Input Data */ - -/************************************************************************ - - - enum / structure - - -************************************************************************/ -enum sh_irda_mode { - SH_IRDA_NONE = 0, - SH_IRDA_SIR, - SH_IRDA_MIR, - SH_IRDA_FIR, -}; - -struct sh_irda_self; -struct sh_irda_xir_func { - int (*xir_fre) (struct sh_irda_self *self); - int (*xir_trov) (struct sh_irda_self *self); - int (*xir_9) (struct sh_irda_self *self); - int (*xir_8) (struct sh_irda_self *self); - int (*xir_fte) (struct sh_irda_self *self); -}; - -struct sh_irda_self { - void __iomem *membase; - unsigned int irq; - struct platform_device *pdev; - - struct net_device *ndev; - - struct irlap_cb *irlap; - struct qos_info qos; - - iobuff_t tx_buff; - iobuff_t rx_buff; - - enum sh_irda_mode mode; - spinlock_t lock; - - struct sh_irda_xir_func *xir_func; -}; - -/************************************************************************ - - - common function - - -************************************************************************/ -static void sh_irda_write(struct sh_irda_self *self, u32 offset, u16 data) -{ - unsigned long flags; - - spin_lock_irqsave(&self->lock, flags); - iowrite16(data, self->membase + offset); - spin_unlock_irqrestore(&self->lock, flags); -} - -static u16 sh_irda_read(struct sh_irda_self *self, u32 offset) -{ - unsigned long flags; - u16 ret; - - spin_lock_irqsave(&self->lock, flags); - ret = ioread16(self->membase + offset); - spin_unlock_irqrestore(&self->lock, flags); - - return ret; -} - -static void sh_irda_update_bits(struct sh_irda_self *self, u32 offset, - u16 mask, u16 data) -{ - unsigned long flags; - u16 old, new; - - spin_lock_irqsave(&self->lock, flags); - old = ioread16(self->membase + offset); - new = (old & ~mask) | data; - if (old != new) - iowrite16(data, self->membase + offset); - spin_unlock_irqrestore(&self->lock, flags); -} - -/************************************************************************ - - - mode function - - -************************************************************************/ -/*===================================== - * - * common - * - *=====================================*/ -static void sh_irda_rcv_ctrl(struct sh_irda_self *self, int enable) -{ - struct device *dev = &self->ndev->dev; - - sh_irda_update_bits(self, IRRCTR, RE, enable ? RE : 0); - dev_dbg(dev, "recv %s\n", enable ? "enable" : "disable"); -} - -static int sh_irda_set_timeout(struct sh_irda_self *self, int interval) -{ - struct device *dev = &self->ndev->dev; - - if (SH_IRDA_SIR != self->mode) - interval = 0; - - if (interval < 0 || interval > 2) { - dev_err(dev, "unsupported timeout interval\n"); - return -EINVAL; - } - - sh_irda_update_bits(self, IRCFR, RTO, interval << RTO_SHIFT); - return 0; -} - -static int sh_irda_set_baudrate(struct sh_irda_self *self, int baudrate) -{ - struct device *dev = &self->ndev->dev; - u16 val; - - if (baudrate < 0) - return 0; - - if (SH_IRDA_SIR != self->mode) { - dev_err(dev, "it is not SIR mode\n"); - return -EINVAL; - } - - /* - * Baud rate (bits/s) = - * (48 MHz / 26) / (baud rate counter value + 1) x 16 - */ - val = (48000000 / 26 / 16 / baudrate) - 1; - dev_dbg(dev, "baudrate = %d, val = 0x%02x\n", baudrate, val); - - sh_irda_update_bits(self, SIRBCR, BRC_MASK, val); - - return 0; -} - -static int sh_irda_get_rcv_length(struct sh_irda_self *self) -{ - return RFL_MASK & sh_irda_read(self, IRRFLR); -} - -/*===================================== - * - * NONE MODE - * - *=====================================*/ -static int sh_irda_xir_fre(struct sh_irda_self *self) -{ - struct device *dev = &self->ndev->dev; - dev_err(dev, "none mode: frame recv\n"); - return 0; -} - -static int sh_irda_xir_trov(struct sh_irda_self *self) -{ - struct device *dev = &self->ndev->dev; - dev_err(dev, "none mode: buffer ram over\n"); - return 0; -} - -static int sh_irda_xir_9(struct sh_irda_self *self) -{ - struct device *dev = &self->ndev->dev; - dev_err(dev, "none mode: time over\n"); - return 0; -} - -static int sh_irda_xir_8(struct sh_irda_self *self) -{ - struct device *dev = &self->ndev->dev; - dev_err(dev, "none mode: framing error\n"); - return 0; -} - -static int sh_irda_xir_fte(struct sh_irda_self *self) -{ - struct device *dev = &self->ndev->dev; - dev_err(dev, "none mode: frame transmit end\n"); - return 0; -} - -static struct sh_irda_xir_func sh_irda_xir_func = { - .xir_fre = sh_irda_xir_fre, - .xir_trov = sh_irda_xir_trov, - .xir_9 = sh_irda_xir_9, - .xir_8 = sh_irda_xir_8, - .xir_fte = sh_irda_xir_fte, -}; - -/*===================================== - * - * MIR/FIR MODE - * - * MIR/FIR are not supported now - *=====================================*/ -static struct sh_irda_xir_func sh_irda_mfir_func = { - .xir_fre = sh_irda_xir_fre, - .xir_trov = sh_irda_xir_trov, - .xir_9 = sh_irda_xir_9, - .xir_8 = sh_irda_xir_8, - .xir_fte = sh_irda_xir_fte, -}; - -/*===================================== - * - * SIR MODE - * - *=====================================*/ -static int sh_irda_sir_fre(struct sh_irda_self *self) -{ - struct device *dev = &self->ndev->dev; - u16 data16; - u8 *data = (u8 *)&data16; - int len = sh_irda_get_rcv_length(self); - int i, j; - - if (len > IRDARAM_LEN) - len = IRDARAM_LEN; - - dev_dbg(dev, "frame recv length = %d\n", len); - - for (i = 0; i < len; i++) { - j = i % 2; - if (!j) - data16 = sh_irda_read(self, IRDARAM + i); - - async_unwrap_char(self->ndev, &self->ndev->stats, - &self->rx_buff, data[j]); - } - self->ndev->last_rx = jiffies; - - sh_irda_rcv_ctrl(self, 1); - - return 0; -} - -static int sh_irda_sir_trov(struct sh_irda_self *self) -{ - struct device *dev = &self->ndev->dev; - - dev_err(dev, "buffer ram over\n"); - sh_irda_rcv_ctrl(self, 1); - return 0; -} - -static int sh_irda_sir_tot(struct sh_irda_self *self) -{ - struct device *dev = &self->ndev->dev; - - dev_err(dev, "time over\n"); - sh_irda_set_baudrate(self, 9600); - sh_irda_rcv_ctrl(self, 1); - return 0; -} - -static int sh_irda_sir_fer(struct sh_irda_self *self) -{ - struct device *dev = &self->ndev->dev; - - dev_err(dev, "framing error\n"); - sh_irda_rcv_ctrl(self, 1); - return 0; -} - -static int sh_irda_sir_fte(struct sh_irda_self *self) -{ - struct device *dev = &self->ndev->dev; - - dev_dbg(dev, "frame transmit end\n"); - netif_wake_queue(self->ndev); - - return 0; -} - -static struct sh_irda_xir_func sh_irda_sir_func = { - .xir_fre = sh_irda_sir_fre, - .xir_trov = sh_irda_sir_trov, - .xir_9 = sh_irda_sir_tot, - .xir_8 = sh_irda_sir_fer, - .xir_fte = sh_irda_sir_fte, -}; - -static void sh_irda_set_mode(struct sh_irda_self *self, enum sh_irda_mode mode) -{ - struct device *dev = &self->ndev->dev; - struct sh_irda_xir_func *func; - const char *name; - u16 data; - - switch (mode) { - case SH_IRDA_SIR: - name = "SIR"; - data = TMD_SIR; - func = &sh_irda_sir_func; - break; - case SH_IRDA_MIR: - name = "MIR"; - data = TMD_MIR; - func = &sh_irda_mfir_func; - break; - case SH_IRDA_FIR: - name = "FIR"; - data = TMD_FIR; - func = &sh_irda_mfir_func; - break; - default: - name = "NONE"; - data = 0; - func = &sh_irda_xir_func; - break; - } - - self->mode = mode; - self->xir_func = func; - sh_irda_update_bits(self, IRTMR, TMD_MASK, data); - - dev_dbg(dev, "switch to %s mode", name); -} - -/************************************************************************ - - - irq function - - -************************************************************************/ -static void sh_irda_set_irq_mask(struct sh_irda_self *self) -{ - u16 tmr_hole; - u16 xir_reg; - - /* set all mask */ - sh_irda_update_bits(self, IRTMR, xIM_MASK, xIM_MASK); - sh_irda_update_bits(self, SIRIMR, xIR_MASK, xIR_MASK); - sh_irda_update_bits(self, MFIRIMR, xIR_MASK, xIR_MASK); - - /* clear irq */ - sh_irda_update_bits(self, SIRICR, xIR_MASK, xIR_MASK); - sh_irda_update_bits(self, MFIRICR, xIR_MASK, xIR_MASK); - - switch (self->mode) { - case SH_IRDA_SIR: - tmr_hole = SIM; - xir_reg = SIRIMR; - break; - case SH_IRDA_MIR: - case SH_IRDA_FIR: - tmr_hole = MIM; - xir_reg = MFIRIMR; - break; - default: - tmr_hole = 0; - xir_reg = 0; - break; - } - - /* open mask */ - if (xir_reg) { - sh_irda_update_bits(self, IRTMR, tmr_hole, 0); - sh_irda_update_bits(self, xir_reg, xIR_MASK, 0); - } -} - -static irqreturn_t sh_irda_irq(int irq, void *dev_id) -{ - struct sh_irda_self *self = dev_id; - struct sh_irda_xir_func *func = self->xir_func; - u16 isr = sh_irda_read(self, SIRISR); - - /* clear irq */ - sh_irda_write(self, SIRICR, isr); - - if (isr & FRE) - func->xir_fre(self); - if (isr & TROV) - func->xir_trov(self); - if (isr & xIR_9) - func->xir_9(self); - if (isr & xIR_8) - func->xir_8(self); - if (isr & FTE) - func->xir_fte(self); - - return IRQ_HANDLED; -} - -/************************************************************************ - - - CRC function - - -************************************************************************/ -static void sh_irda_crc_reset(struct sh_irda_self *self) -{ - sh_irda_write(self, CRCCTR, CRC_RST); -} - -static void sh_irda_crc_add(struct sh_irda_self *self, u16 data) -{ - sh_irda_write(self, CRCIR, data & CRC_IN_MASK); -} - -static u16 sh_irda_crc_cnt(struct sh_irda_self *self) -{ - return CRC_CT_MASK & sh_irda_read(self, CRCCTR); -} - -static u16 sh_irda_crc_out(struct sh_irda_self *self) -{ - return sh_irda_read(self, CRCOR); -} - -static int sh_irda_crc_init(struct sh_irda_self *self) -{ - struct device *dev = &self->ndev->dev; - int ret = -EIO; - u16 val; - - sh_irda_crc_reset(self); - - sh_irda_crc_add(self, 0xCC); - sh_irda_crc_add(self, 0xF5); - sh_irda_crc_add(self, 0xF1); - sh_irda_crc_add(self, 0xA7); - - val = sh_irda_crc_cnt(self); - if (4 != val) { - dev_err(dev, "CRC count error %x\n", val); - goto crc_init_out; - } - - val = sh_irda_crc_out(self); - if (0x51DF != val) { - dev_err(dev, "CRC result error%x\n", val); - goto crc_init_out; - } - - ret = 0; - -crc_init_out: - - sh_irda_crc_reset(self); - return ret; -} - -/************************************************************************ - - - iobuf function - - -************************************************************************/ -static void sh_irda_remove_iobuf(struct sh_irda_self *self) -{ - kfree(self->rx_buff.head); - - self->tx_buff.head = NULL; - self->tx_buff.data = NULL; - self->rx_buff.head = NULL; - self->rx_buff.data = NULL; -} - -static int sh_irda_init_iobuf(struct sh_irda_self *self, int rxsize, int txsize) -{ - if (self->rx_buff.head || - self->tx_buff.head) { - dev_err(&self->ndev->dev, "iobuff has already existed."); - return -EINVAL; - } - - /* rx_buff */ - self->rx_buff.head = kmalloc(rxsize, GFP_KERNEL); - if (!self->rx_buff.head) - return -ENOMEM; - - self->rx_buff.truesize = rxsize; - self->rx_buff.in_frame = FALSE; - self->rx_buff.state = OUTSIDE_FRAME; - self->rx_buff.data = self->rx_buff.head; - - /* tx_buff */ - self->tx_buff.head = self->membase + IRDARAM; - self->tx_buff.truesize = IRDARAM_LEN; - - return 0; -} - -/************************************************************************ - - - net_device_ops function - - -************************************************************************/ -static int sh_irda_hard_xmit(struct sk_buff *skb, struct net_device *ndev) -{ - struct sh_irda_self *self = netdev_priv(ndev); - struct device *dev = &self->ndev->dev; - int speed = irda_get_next_speed(skb); - int ret; - - dev_dbg(dev, "hard xmit\n"); - - netif_stop_queue(ndev); - sh_irda_rcv_ctrl(self, 0); - - ret = sh_irda_set_baudrate(self, speed); - if (ret < 0) - goto sh_irda_hard_xmit_end; - - self->tx_buff.len = 0; - if (skb->len) { - unsigned long flags; - - spin_lock_irqsave(&self->lock, flags); - self->tx_buff.len = async_wrap_skb(skb, - self->tx_buff.head, - self->tx_buff.truesize); - spin_unlock_irqrestore(&self->lock, flags); - - if (self->tx_buff.len > self->tx_buff.truesize) - self->tx_buff.len = self->tx_buff.truesize; - - sh_irda_write(self, IRTFLR, self->tx_buff.len); - sh_irda_write(self, IRTCTR, ARMOD | TE); - } else - goto sh_irda_hard_xmit_end; - - dev_kfree_skb(skb); - - return 0; - -sh_irda_hard_xmit_end: - sh_irda_set_baudrate(self, 9600); - netif_wake_queue(self->ndev); - sh_irda_rcv_ctrl(self, 1); - dev_kfree_skb(skb); - - return ret; - -} - -static int sh_irda_ioctl(struct net_device *ndev, struct ifreq *ifreq, int cmd) -{ - /* - * FIXME - * - * This function is needed for irda framework. - * But nothing to do now - */ - return 0; -} - -static struct net_device_stats *sh_irda_stats(struct net_device *ndev) -{ - struct sh_irda_self *self = netdev_priv(ndev); - - return &self->ndev->stats; -} - -static int sh_irda_open(struct net_device *ndev) -{ - struct sh_irda_self *self = netdev_priv(ndev); - int err; - - pm_runtime_get_sync(&self->pdev->dev); - err = sh_irda_crc_init(self); - if (err) - goto open_err; - - sh_irda_set_mode(self, SH_IRDA_SIR); - sh_irda_set_timeout(self, 2); - sh_irda_set_baudrate(self, 9600); - - self->irlap = irlap_open(ndev, &self->qos, DRIVER_NAME); - if (!self->irlap) { - err = -ENODEV; - goto open_err; - } - - netif_start_queue(ndev); - sh_irda_rcv_ctrl(self, 1); - sh_irda_set_irq_mask(self); - - dev_info(&ndev->dev, "opened\n"); - - return 0; - -open_err: - pm_runtime_put_sync(&self->pdev->dev); - - return err; -} - -static int sh_irda_stop(struct net_device *ndev) -{ - struct sh_irda_self *self = netdev_priv(ndev); - - /* Stop IrLAP */ - if (self->irlap) { - irlap_close(self->irlap); - self->irlap = NULL; - } - - netif_stop_queue(ndev); - pm_runtime_put_sync(&self->pdev->dev); - - dev_info(&ndev->dev, "stopped\n"); - - return 0; -} - -static const struct net_device_ops sh_irda_ndo = { - .ndo_open = sh_irda_open, - .ndo_stop = sh_irda_stop, - .ndo_start_xmit = sh_irda_hard_xmit, - .ndo_do_ioctl = sh_irda_ioctl, - .ndo_get_stats = sh_irda_stats, -}; - -/************************************************************************ - - - platform_driver function - - -************************************************************************/ -static int sh_irda_probe(struct platform_device *pdev) -{ - struct net_device *ndev; - struct sh_irda_self *self; - struct resource *res; - int irq; - int err = -ENOMEM; - - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - irq = platform_get_irq(pdev, 0); - if (!res || irq < 0) { - dev_err(&pdev->dev, "Not enough platform resources.\n"); - goto exit; - } - - ndev = alloc_irdadev(sizeof(*self)); - if (!ndev) - goto exit; - - self = netdev_priv(ndev); - self->membase = ioremap_nocache(res->start, resource_size(res)); - if (!self->membase) { - err = -ENXIO; - dev_err(&pdev->dev, "Unable to ioremap.\n"); - goto err_mem_1; - } - - err = sh_irda_init_iobuf(self, IRDA_SKB_MAX_MTU, IRDA_SIR_MAX_FRAME); - if (err) - goto err_mem_2; - - self->pdev = pdev; - pm_runtime_enable(&pdev->dev); - - irda_init_max_qos_capabilies(&self->qos); - - ndev->netdev_ops = &sh_irda_ndo; - ndev->irq = irq; - - self->ndev = ndev; - self->qos.baud_rate.bits &= IR_9600; /* FIXME */ - self->qos.min_turn_time.bits = 1; /* 10 ms or more */ - spin_lock_init(&self->lock); - - irda_qos_bits_to_value(&self->qos); - - err = register_netdev(ndev); - if (err) - goto err_mem_4; - - platform_set_drvdata(pdev, ndev); - err = devm_request_irq(&pdev->dev, irq, sh_irda_irq, 0, "sh_irda", self); - if (err) { - dev_warn(&pdev->dev, "Unable to attach sh_irda interrupt\n"); - goto err_mem_4; - } - - dev_info(&pdev->dev, "SuperH IrDA probed\n"); - - goto exit; - -err_mem_4: - pm_runtime_disable(&pdev->dev); - sh_irda_remove_iobuf(self); -err_mem_2: - iounmap(self->membase); -err_mem_1: - free_netdev(ndev); -exit: - return err; -} - -static int sh_irda_remove(struct platform_device *pdev) -{ - struct net_device *ndev = platform_get_drvdata(pdev); - struct sh_irda_self *self = netdev_priv(ndev); - - if (!self) - return 0; - - unregister_netdev(ndev); - pm_runtime_disable(&pdev->dev); - sh_irda_remove_iobuf(self); - iounmap(self->membase); - free_netdev(ndev); - - return 0; -} - -static int sh_irda_runtime_nop(struct device *dev) -{ - /* Runtime PM callback shared between ->runtime_suspend() - * and ->runtime_resume(). Simply returns success. - * - * This driver re-initializes all registers after - * pm_runtime_get_sync() anyway so there is no need - * to save and restore registers here. - */ - return 0; -} - -static const struct dev_pm_ops sh_irda_pm_ops = { - .runtime_suspend = sh_irda_runtime_nop, - .runtime_resume = sh_irda_runtime_nop, -}; - -static struct platform_driver sh_irda_driver = { - .probe = sh_irda_probe, - .remove = sh_irda_remove, - .driver = { - .name = DRIVER_NAME, - .pm = &sh_irda_pm_ops, - }, -}; - -module_platform_driver(sh_irda_driver); - -MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>"); -MODULE_DESCRIPTION("SuperH IrDA driver"); -MODULE_LICENSE("GPL"); |