Lines Matching full:i2c
1 /* linux/drivers/i2c/busses/i2c-s3c2410.c
6 * S3C2410 I2C Controller
26 #include <linux/i2c.h>
46 /* i2c controller state */
97 static inline int s3c24xx_i2c_is2440(struct s3c24xx_i2c *i2c) in s3c24xx_i2c_is2440() argument
99 struct platform_device *pdev = to_platform_device(i2c->dev); in s3c24xx_i2c_is2440()
103 if (i2c->dev->of_node) in s3c24xx_i2c_is2440()
104 return of_device_is_compatible(i2c->dev->of_node, in s3c24xx_i2c_is2440()
105 "samsung,s3c2440-i2c"); in s3c24xx_i2c_is2440()
118 static inline void s3c24xx_i2c_master_complete(struct s3c24xx_i2c *i2c, int ret) in s3c24xx_i2c_master_complete() argument
120 dev_dbg(i2c->dev, "master_complete %d\n", ret); in s3c24xx_i2c_master_complete()
122 i2c->msg_ptr = 0; in s3c24xx_i2c_master_complete()
123 i2c->msg = NULL; in s3c24xx_i2c_master_complete()
124 i2c->msg_idx++; in s3c24xx_i2c_master_complete()
125 i2c->msg_num = 0; in s3c24xx_i2c_master_complete()
127 i2c->msg_idx = ret; in s3c24xx_i2c_master_complete()
129 wake_up(&i2c->wait); in s3c24xx_i2c_master_complete()
132 static inline void s3c24xx_i2c_disable_ack(struct s3c24xx_i2c *i2c) in s3c24xx_i2c_disable_ack() argument
136 tmp = readl(i2c->regs + S3C2410_IICCON); in s3c24xx_i2c_disable_ack()
137 writel(tmp & ~S3C2410_IICCON_ACKEN, i2c->regs + S3C2410_IICCON); in s3c24xx_i2c_disable_ack()
140 static inline void s3c24xx_i2c_enable_ack(struct s3c24xx_i2c *i2c) in s3c24xx_i2c_enable_ack() argument
144 tmp = readl(i2c->regs + S3C2410_IICCON); in s3c24xx_i2c_enable_ack()
145 writel(tmp | S3C2410_IICCON_ACKEN, i2c->regs + S3C2410_IICCON); in s3c24xx_i2c_enable_ack()
150 static inline void s3c24xx_i2c_disable_irq(struct s3c24xx_i2c *i2c) in s3c24xx_i2c_disable_irq() argument
154 tmp = readl(i2c->regs + S3C2410_IICCON); in s3c24xx_i2c_disable_irq()
155 writel(tmp & ~S3C2410_IICCON_IRQEN, i2c->regs + S3C2410_IICCON); in s3c24xx_i2c_disable_irq()
158 static inline void s3c24xx_i2c_enable_irq(struct s3c24xx_i2c *i2c) in s3c24xx_i2c_enable_irq() argument
162 tmp = readl(i2c->regs + S3C2410_IICCON); in s3c24xx_i2c_enable_irq()
163 writel(tmp | S3C2410_IICCON_IRQEN, i2c->regs + S3C2410_IICCON); in s3c24xx_i2c_enable_irq()
172 static void s3c24xx_i2c_message_start(struct s3c24xx_i2c *i2c, in s3c24xx_i2c_message_start() argument
192 s3c24xx_i2c_enable_ack(i2c); in s3c24xx_i2c_message_start()
194 iiccon = readl(i2c->regs + S3C2410_IICCON); in s3c24xx_i2c_message_start()
195 writel(stat, i2c->regs + S3C2410_IICSTAT); in s3c24xx_i2c_message_start()
197 dev_dbg(i2c->dev, "START: %08lx to IICSTAT, %02x to DS\n", stat, addr); in s3c24xx_i2c_message_start()
198 writeb(addr, i2c->regs + S3C2410_IICDS); in s3c24xx_i2c_message_start()
203 ndelay(i2c->tx_setup); in s3c24xx_i2c_message_start()
205 dev_dbg(i2c->dev, "iiccon, %08lx\n", iiccon); in s3c24xx_i2c_message_start()
206 writel(iiccon, i2c->regs + S3C2410_IICCON); in s3c24xx_i2c_message_start()
209 writel(stat, i2c->regs + S3C2410_IICSTAT); in s3c24xx_i2c_message_start()
212 static inline void s3c24xx_i2c_stop(struct s3c24xx_i2c *i2c, int ret) in s3c24xx_i2c_stop() argument
214 unsigned long iicstat = readl(i2c->regs + S3C2410_IICSTAT); in s3c24xx_i2c_stop()
216 dev_dbg(i2c->dev, "STOP\n"); in s3c24xx_i2c_stop()
220 writel(iicstat, i2c->regs + S3C2410_IICSTAT); in s3c24xx_i2c_stop()
222 i2c->state = STATE_STOP; in s3c24xx_i2c_stop()
224 s3c24xx_i2c_master_complete(i2c, ret); in s3c24xx_i2c_stop()
225 s3c24xx_i2c_disable_irq(i2c); in s3c24xx_i2c_stop()
236 static inline int is_lastmsg(struct s3c24xx_i2c *i2c) in is_lastmsg() argument
238 return i2c->msg_idx >= (i2c->msg_num - 1); in is_lastmsg()
246 static inline int is_msglast(struct s3c24xx_i2c *i2c) in is_msglast() argument
248 return i2c->msg_ptr == i2c->msg->len-1; in is_msglast()
256 static inline int is_msgend(struct s3c24xx_i2c *i2c) in is_msgend() argument
258 return i2c->msg_ptr >= i2c->msg->len; in is_msgend()
266 static int i2c_s3c_irq_nextbyte(struct s3c24xx_i2c *i2c, unsigned long iicstat) in i2c_s3c_irq_nextbyte() argument
272 switch (i2c->state) { in i2c_s3c_irq_nextbyte()
275 dev_err(i2c->dev, "%s: called in STATE_IDLE\n", __func__); in i2c_s3c_irq_nextbyte()
279 dev_err(i2c->dev, "%s: called in STATE_STOP\n", __func__); in i2c_s3c_irq_nextbyte()
280 s3c24xx_i2c_disable_irq(i2c); in i2c_s3c_irq_nextbyte()
285 * bus, or started a new i2c message in i2c_s3c_irq_nextbyte()
289 !(i2c->msg->flags & I2C_M_IGNORE_NAK)) { in i2c_s3c_irq_nextbyte()
292 dev_dbg(i2c->dev, "ack was not received\n"); in i2c_s3c_irq_nextbyte()
293 s3c24xx_i2c_stop(i2c, -ENXIO); in i2c_s3c_irq_nextbyte()
297 if (i2c->msg->flags & I2C_M_RD) in i2c_s3c_irq_nextbyte()
298 i2c->state = STATE_READ; in i2c_s3c_irq_nextbyte()
300 i2c->state = STATE_WRITE; in i2c_s3c_irq_nextbyte()
303 * as this is used by the i2c probe to find devices. */ in i2c_s3c_irq_nextbyte()
305 if (is_lastmsg(i2c) && i2c->msg->len == 0) { in i2c_s3c_irq_nextbyte()
306 s3c24xx_i2c_stop(i2c, 0); in i2c_s3c_irq_nextbyte()
310 if (i2c->state == STATE_READ) in i2c_s3c_irq_nextbyte()
321 if (!(i2c->msg->flags & I2C_M_IGNORE_NAK)) { in i2c_s3c_irq_nextbyte()
323 dev_dbg(i2c->dev, "WRITE: No Ack\n"); in i2c_s3c_irq_nextbyte()
325 s3c24xx_i2c_stop(i2c, -ECONNREFUSED); in i2c_s3c_irq_nextbyte()
332 if (!is_msgend(i2c)) { in i2c_s3c_irq_nextbyte()
333 byte = i2c->msg->buf[i2c->msg_ptr++]; in i2c_s3c_irq_nextbyte()
334 writeb(byte, i2c->regs + S3C2410_IICDS); in i2c_s3c_irq_nextbyte()
342 ndelay(i2c->tx_setup); in i2c_s3c_irq_nextbyte()
344 } else if (!is_lastmsg(i2c)) { in i2c_s3c_irq_nextbyte()
345 /* we need to go to the next i2c message */ in i2c_s3c_irq_nextbyte()
347 dev_dbg(i2c->dev, "WRITE: Next Message\n"); in i2c_s3c_irq_nextbyte()
349 i2c->msg_ptr = 0; in i2c_s3c_irq_nextbyte()
350 i2c->msg_idx++; in i2c_s3c_irq_nextbyte()
351 i2c->msg++; in i2c_s3c_irq_nextbyte()
354 if (i2c->msg->flags & I2C_M_NOSTART) { in i2c_s3c_irq_nextbyte()
356 if (i2c->msg->flags & I2C_M_RD) { in i2c_s3c_irq_nextbyte()
361 s3c24xx_i2c_stop(i2c, -EINVAL); in i2c_s3c_irq_nextbyte()
367 s3c24xx_i2c_message_start(i2c, i2c->msg); in i2c_s3c_irq_nextbyte()
368 i2c->state = STATE_START; in i2c_s3c_irq_nextbyte()
374 s3c24xx_i2c_stop(i2c, 0); in i2c_s3c_irq_nextbyte()
384 byte = readb(i2c->regs + S3C2410_IICDS); in i2c_s3c_irq_nextbyte()
385 i2c->msg->buf[i2c->msg_ptr++] = byte; in i2c_s3c_irq_nextbyte()
388 if (is_msglast(i2c)) { in i2c_s3c_irq_nextbyte()
391 if (is_lastmsg(i2c)) in i2c_s3c_irq_nextbyte()
392 s3c24xx_i2c_disable_ack(i2c); in i2c_s3c_irq_nextbyte()
394 } else if (is_msgend(i2c)) { in i2c_s3c_irq_nextbyte()
398 if (is_lastmsg(i2c)) { in i2c_s3c_irq_nextbyte()
400 dev_dbg(i2c->dev, "READ: Send Stop\n"); in i2c_s3c_irq_nextbyte()
402 s3c24xx_i2c_stop(i2c, 0); in i2c_s3c_irq_nextbyte()
405 dev_dbg(i2c->dev, "READ: Next Transfer\n"); in i2c_s3c_irq_nextbyte()
407 i2c->msg_ptr = 0; in i2c_s3c_irq_nextbyte()
408 i2c->msg_idx++; in i2c_s3c_irq_nextbyte()
409 i2c->msg++; in i2c_s3c_irq_nextbyte()
419 tmp = readl(i2c->regs + S3C2410_IICCON); in i2c_s3c_irq_nextbyte()
421 writel(tmp, i2c->regs + S3C2410_IICCON); in i2c_s3c_irq_nextbyte()
433 struct s3c24xx_i2c *i2c = dev_id; in s3c24xx_i2c_irq() local
437 status = readl(i2c->regs + S3C2410_IICSTAT); in s3c24xx_i2c_irq()
441 dev_err(i2c->dev, "deal with arbitration loss\n"); in s3c24xx_i2c_irq()
444 if (i2c->state == STATE_IDLE) { in s3c24xx_i2c_irq()
445 dev_dbg(i2c->dev, "IRQ: error i2c->state == IDLE\n"); in s3c24xx_i2c_irq()
447 tmp = readl(i2c->regs + S3C2410_IICCON); in s3c24xx_i2c_irq()
449 writel(tmp, i2c->regs + S3C2410_IICCON); in s3c24xx_i2c_irq()
456 i2c_s3c_irq_nextbyte(i2c, status); in s3c24xx_i2c_irq()
465 * get the i2c bus for a master transaction
468 static int s3c24xx_i2c_set_master(struct s3c24xx_i2c *i2c) in s3c24xx_i2c_set_master() argument
474 iicstat = readl(i2c->regs + S3C2410_IICSTAT); in s3c24xx_i2c_set_master()
487 * this starts an i2c transfer
490 static int s3c24xx_i2c_doxfer(struct s3c24xx_i2c *i2c, in s3c24xx_i2c_doxfer() argument
497 if (i2c->suspended) in s3c24xx_i2c_doxfer()
500 ret = s3c24xx_i2c_set_master(i2c); in s3c24xx_i2c_doxfer()
502 dev_err(i2c->dev, "cannot get bus (error %d)\n", ret); in s3c24xx_i2c_doxfer()
507 spin_lock_irq(&i2c->lock); in s3c24xx_i2c_doxfer()
509 i2c->msg = msgs; in s3c24xx_i2c_doxfer()
510 i2c->msg_num = num; in s3c24xx_i2c_doxfer()
511 i2c->msg_ptr = 0; in s3c24xx_i2c_doxfer()
512 i2c->msg_idx = 0; in s3c24xx_i2c_doxfer()
513 i2c->state = STATE_START; in s3c24xx_i2c_doxfer()
515 s3c24xx_i2c_enable_irq(i2c); in s3c24xx_i2c_doxfer()
516 s3c24xx_i2c_message_start(i2c, msgs); in s3c24xx_i2c_doxfer()
517 spin_unlock_irq(&i2c->lock); in s3c24xx_i2c_doxfer()
519 timeout = wait_event_timeout(i2c->wait, i2c->msg_num == 0, HZ * 5); in s3c24xx_i2c_doxfer()
521 ret = i2c->msg_idx; in s3c24xx_i2c_doxfer()
527 dev_dbg(i2c->dev, "timeout\n"); in s3c24xx_i2c_doxfer()
529 dev_dbg(i2c->dev, "incomplete xfer (%d)\n", ret); in s3c24xx_i2c_doxfer()
533 dev_dbg(i2c->dev, "waiting for bus idle\n"); in s3c24xx_i2c_doxfer()
538 iicstat = readl(i2c->regs + S3C2410_IICSTAT); in s3c24xx_i2c_doxfer()
544 iicstat = readl(i2c->regs + S3C2410_IICSTAT); in s3c24xx_i2c_doxfer()
548 dev_warn(i2c->dev, "timeout waiting for bus idle\n"); in s3c24xx_i2c_doxfer()
556 * first port of call from the i2c bus code when an message needs
557 * transferring across the i2c bus.
563 struct s3c24xx_i2c *i2c = (struct s3c24xx_i2c *)adap->algo_data; in s3c24xx_i2c_xfer() local
567 clk_enable(i2c->clk); in s3c24xx_i2c_xfer()
571 ret = s3c24xx_i2c_doxfer(i2c, msgs, num); in s3c24xx_i2c_xfer()
574 clk_disable(i2c->clk); in s3c24xx_i2c_xfer()
578 dev_dbg(i2c->dev, "Retrying transmission (%d)\n", retry); in s3c24xx_i2c_xfer()
583 clk_disable(i2c->clk); in s3c24xx_i2c_xfer()
587 /* declare our i2c functionality */
593 /* i2c bus registration info */
637 static int s3c24xx_i2c_clockrate(struct s3c24xx_i2c *i2c, unsigned int *got) in s3c24xx_i2c_clockrate() argument
639 struct s3c2410_platform_i2c *pdata = i2c->pdata; in s3c24xx_i2c_clockrate()
640 unsigned long clkin = clk_get_rate(i2c->clk); in s3c24xx_i2c_clockrate()
646 i2c->clkrate = clkin; in s3c24xx_i2c_clockrate()
649 dev_dbg(i2c->dev, "pdata desired frequency %lu\n", pdata->frequency); in s3c24xx_i2c_clockrate()
658 dev_err(i2c->dev, in s3c24xx_i2c_clockrate()
666 iiccon = readl(i2c->regs + S3C2410_IICCON); in s3c24xx_i2c_clockrate()
673 writel(iiccon, i2c->regs + S3C2410_IICCON); in s3c24xx_i2c_clockrate()
675 if (s3c24xx_i2c_is2440(i2c)) { in s3c24xx_i2c_clockrate()
688 dev_dbg(i2c->dev, "IICLC=%08lx\n", sda_delay); in s3c24xx_i2c_clockrate()
689 writel(sda_delay, i2c->regs + S3C2440_IICLC); in s3c24xx_i2c_clockrate()
702 struct s3c24xx_i2c *i2c = freq_to_i2c(nb); in s3c24xx_i2c_cpufreq_transition() local
708 delta_f = clk_get_rate(i2c->clk) - i2c->clkrate; in s3c24xx_i2c_cpufreq_transition()
717 spin_lock_irqsave(&i2c->lock, flags); in s3c24xx_i2c_cpufreq_transition()
718 ret = s3c24xx_i2c_clockrate(i2c, &got); in s3c24xx_i2c_cpufreq_transition()
719 spin_unlock_irqrestore(&i2c->lock, flags); in s3c24xx_i2c_cpufreq_transition()
722 dev_err(i2c->dev, "cannot find frequency\n"); in s3c24xx_i2c_cpufreq_transition()
724 dev_info(i2c->dev, "setting freq %d\n", got); in s3c24xx_i2c_cpufreq_transition()
730 static inline int s3c24xx_i2c_register_cpufreq(struct s3c24xx_i2c *i2c) in s3c24xx_i2c_register_cpufreq() argument
732 i2c->freq_transition.notifier_call = s3c24xx_i2c_cpufreq_transition; in s3c24xx_i2c_register_cpufreq()
734 return cpufreq_register_notifier(&i2c->freq_transition, in s3c24xx_i2c_register_cpufreq()
738 static inline void s3c24xx_i2c_deregister_cpufreq(struct s3c24xx_i2c *i2c) in s3c24xx_i2c_deregister_cpufreq() argument
740 cpufreq_unregister_notifier(&i2c->freq_transition, in s3c24xx_i2c_deregister_cpufreq()
745 static inline int s3c24xx_i2c_register_cpufreq(struct s3c24xx_i2c *i2c) in s3c24xx_i2c_register_cpufreq() argument
750 static inline void s3c24xx_i2c_deregister_cpufreq(struct s3c24xx_i2c *i2c) in s3c24xx_i2c_deregister_cpufreq() argument
756 static int s3c24xx_i2c_parse_dt_gpio(struct s3c24xx_i2c *i2c) in s3c24xx_i2c_parse_dt_gpio() argument
761 gpio = of_get_gpio(i2c->dev->of_node, idx); in s3c24xx_i2c_parse_dt_gpio()
763 dev_err(i2c->dev, "invalid gpio[%d]: %d\n", idx, gpio); in s3c24xx_i2c_parse_dt_gpio()
767 ret = gpio_request(gpio, "i2c-bus"); in s3c24xx_i2c_parse_dt_gpio()
769 dev_err(i2c->dev, "gpio [%d] request failed\n", gpio); in s3c24xx_i2c_parse_dt_gpio()
777 gpio_free(i2c->gpios[idx]); in s3c24xx_i2c_parse_dt_gpio()
781 static void s3c24xx_i2c_dt_gpio_free(struct s3c24xx_i2c *i2c) in s3c24xx_i2c_dt_gpio_free() argument
785 gpio_free(i2c->gpios[idx]); in s3c24xx_i2c_dt_gpio_free()
788 static int s3c24xx_i2c_parse_dt_gpio(struct s3c24xx_i2c *i2c) in s3c24xx_i2c_parse_dt_gpio() argument
793 static void s3c24xx_i2c_dt_gpio_free(struct s3c24xx_i2c *i2c) in s3c24xx_i2c_dt_gpio_free() argument
803 static int s3c24xx_i2c_init(struct s3c24xx_i2c *i2c) in s3c24xx_i2c_init() argument
811 pdata = i2c->pdata; in s3c24xx_i2c_init()
816 pdata->cfg_gpio(to_platform_device(i2c->dev)); in s3c24xx_i2c_init()
818 if (s3c24xx_i2c_parse_dt_gpio(i2c)) in s3c24xx_i2c_init()
823 writeb(pdata->slave_addr, i2c->regs + S3C2410_IICADD); in s3c24xx_i2c_init()
825 dev_info(i2c->dev, "slave address 0x%02x\n", pdata->slave_addr); in s3c24xx_i2c_init()
827 writel(iicon, i2c->regs + S3C2410_IICCON); in s3c24xx_i2c_init()
831 if (s3c24xx_i2c_clockrate(i2c, &freq) != 0) { in s3c24xx_i2c_init()
832 writel(0, i2c->regs + S3C2410_IICCON); in s3c24xx_i2c_init()
833 dev_err(i2c->dev, "cannot meet bus frequency required\n"); in s3c24xx_i2c_init()
837 /* todo - check that the i2c lines aren't being dragged anywhere */ in s3c24xx_i2c_init()
839 dev_info(i2c->dev, "bus frequency set to %d KHz\n", freq); in s3c24xx_i2c_init()
840 dev_dbg(i2c->dev, "S3C2410_IICCON=0x%02lx\n", iicon); in s3c24xx_i2c_init()
852 s3c24xx_i2c_parse_dt(struct device_node *np, struct s3c24xx_i2c *i2c) in s3c24xx_i2c_parse_dt() argument
854 struct s3c2410_platform_i2c *pdata = i2c->pdata; in s3c24xx_i2c_parse_dt()
859 pdata->bus_num = -1; /* i2c bus number is dynamically assigned */ in s3c24xx_i2c_parse_dt()
860 of_property_read_u32(np, "samsung,i2c-sda-delay", &pdata->sda_delay); in s3c24xx_i2c_parse_dt()
861 of_property_read_u32(np, "samsung,i2c-slave-addr", &pdata->slave_addr); in s3c24xx_i2c_parse_dt()
862 of_property_read_u32(np, "samsung,i2c-max-bus-freq", in s3c24xx_i2c_parse_dt()
867 s3c24xx_i2c_parse_dt(struct device_node *np, struct s3c24xx_i2c *i2c) in s3c24xx_i2c_parse_dt() argument
880 struct s3c24xx_i2c *i2c; in s3c24xx_i2c_probe() local
893 i2c = kzalloc(sizeof(struct s3c24xx_i2c), GFP_KERNEL); in s3c24xx_i2c_probe()
894 if (!i2c) { in s3c24xx_i2c_probe()
899 i2c->pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); in s3c24xx_i2c_probe()
900 if (!i2c->pdata) { in s3c24xx_i2c_probe()
906 memcpy(i2c->pdata, pdata, sizeof(*pdata)); in s3c24xx_i2c_probe()
908 s3c24xx_i2c_parse_dt(pdev->dev.of_node, i2c); in s3c24xx_i2c_probe()
910 strlcpy(i2c->adap.name, "s3c2410-i2c", sizeof(i2c->adap.name)); in s3c24xx_i2c_probe()
911 i2c->adap.owner = THIS_MODULE; in s3c24xx_i2c_probe()
912 i2c->adap.algo = &s3c24xx_i2c_algorithm; in s3c24xx_i2c_probe()
913 i2c->adap.retries = 2; in s3c24xx_i2c_probe()
914 i2c->adap.class = I2C_CLASS_HWMON | I2C_CLASS_SPD; in s3c24xx_i2c_probe()
915 i2c->tx_setup = 50; in s3c24xx_i2c_probe()
917 spin_lock_init(&i2c->lock); in s3c24xx_i2c_probe()
918 init_waitqueue_head(&i2c->wait); in s3c24xx_i2c_probe()
922 i2c->dev = &pdev->dev; in s3c24xx_i2c_probe()
923 i2c->clk = clk_get(&pdev->dev, "i2c"); in s3c24xx_i2c_probe()
924 if (IS_ERR(i2c->clk)) { in s3c24xx_i2c_probe()
930 dev_dbg(&pdev->dev, "clock source %p\n", i2c->clk); in s3c24xx_i2c_probe()
932 clk_enable(i2c->clk); in s3c24xx_i2c_probe()
943 i2c->ioarea = request_mem_region(res->start, resource_size(res), in s3c24xx_i2c_probe()
946 if (i2c->ioarea == NULL) { in s3c24xx_i2c_probe()
952 i2c->regs = ioremap(res->start, resource_size(res)); in s3c24xx_i2c_probe()
954 if (i2c->regs == NULL) { in s3c24xx_i2c_probe()
961 i2c->regs, i2c->ioarea, res); in s3c24xx_i2c_probe()
963 /* setup info block for the i2c core */ in s3c24xx_i2c_probe()
965 i2c->adap.algo_data = i2c; in s3c24xx_i2c_probe()
966 i2c->adap.dev.parent = &pdev->dev; in s3c24xx_i2c_probe()
968 /* initialise the i2c controller */ in s3c24xx_i2c_probe()
970 ret = s3c24xx_i2c_init(i2c); in s3c24xx_i2c_probe()
978 i2c->irq = ret = platform_get_irq(pdev, 0); in s3c24xx_i2c_probe()
984 ret = request_irq(i2c->irq, s3c24xx_i2c_irq, 0, in s3c24xx_i2c_probe()
985 dev_name(&pdev->dev), i2c); in s3c24xx_i2c_probe()
988 dev_err(&pdev->dev, "cannot claim IRQ %d\n", i2c->irq); in s3c24xx_i2c_probe()
992 ret = s3c24xx_i2c_register_cpufreq(i2c); in s3c24xx_i2c_probe()
1004 i2c->adap.nr = i2c->pdata->bus_num; in s3c24xx_i2c_probe()
1005 i2c->adap.dev.of_node = pdev->dev.of_node; in s3c24xx_i2c_probe()
1007 ret = i2c_add_numbered_adapter(&i2c->adap); in s3c24xx_i2c_probe()
1009 dev_err(&pdev->dev, "failed to add bus to i2c core\n"); in s3c24xx_i2c_probe()
1013 of_i2c_register_devices(&i2c->adap); in s3c24xx_i2c_probe()
1014 platform_set_drvdata(pdev, i2c); in s3c24xx_i2c_probe()
1016 dev_info(&pdev->dev, "%s: S3C I2C adapter\n", dev_name(&i2c->adap.dev)); in s3c24xx_i2c_probe()
1017 clk_disable(i2c->clk); in s3c24xx_i2c_probe()
1021 s3c24xx_i2c_deregister_cpufreq(i2c); in s3c24xx_i2c_probe()
1024 free_irq(i2c->irq, i2c); in s3c24xx_i2c_probe()
1027 iounmap(i2c->regs); in s3c24xx_i2c_probe()
1030 release_resource(i2c->ioarea); in s3c24xx_i2c_probe()
1031 kfree(i2c->ioarea); in s3c24xx_i2c_probe()
1034 clk_disable(i2c->clk); in s3c24xx_i2c_probe()
1035 clk_put(i2c->clk); in s3c24xx_i2c_probe()
1038 kfree(i2c); in s3c24xx_i2c_probe()
1049 struct s3c24xx_i2c *i2c = platform_get_drvdata(pdev); in s3c24xx_i2c_remove() local
1051 s3c24xx_i2c_deregister_cpufreq(i2c); in s3c24xx_i2c_remove()
1053 i2c_del_adapter(&i2c->adap); in s3c24xx_i2c_remove()
1054 free_irq(i2c->irq, i2c); in s3c24xx_i2c_remove()
1056 clk_disable(i2c->clk); in s3c24xx_i2c_remove()
1057 clk_put(i2c->clk); in s3c24xx_i2c_remove()
1059 iounmap(i2c->regs); in s3c24xx_i2c_remove()
1061 release_resource(i2c->ioarea); in s3c24xx_i2c_remove()
1062 s3c24xx_i2c_dt_gpio_free(i2c); in s3c24xx_i2c_remove()
1063 kfree(i2c->ioarea); in s3c24xx_i2c_remove()
1064 kfree(i2c); in s3c24xx_i2c_remove()
1073 struct s3c24xx_i2c *i2c = platform_get_drvdata(pdev); in s3c24xx_i2c_suspend_noirq() local
1075 i2c->suspended = 1; in s3c24xx_i2c_suspend_noirq()
1083 struct s3c24xx_i2c *i2c = platform_get_drvdata(pdev); in s3c24xx_i2c_resume() local
1085 i2c->suspended = 0; in s3c24xx_i2c_resume()
1086 clk_enable(i2c->clk); in s3c24xx_i2c_resume()
1087 s3c24xx_i2c_init(i2c); in s3c24xx_i2c_resume()
1088 clk_disable(i2c->clk); in s3c24xx_i2c_resume()
1107 .name = "s3c2410-i2c",
1110 .name = "s3c2440-i2c",
1118 { .compatible = "samsung,s3c2410-i2c" },
1119 { .compatible = "samsung,s3c2440-i2c" },
1133 .name = "s3c-i2c",
1151 MODULE_DESCRIPTION("S3C24XX I2C Bus driver");