修改led为gpio

hc

2024-10-12 a5969cabbb4660eab42b6ef0412cbbd1200cf14d

 kernel/drivers/i2c/busses/i2c-stu300.c
..
..
@@ -1,6 +1,6 @@
1
+// SPDX-License-Identifier: GPL-2.0-only
1
2
 /*
2
3
  * Copyright (C) 2007-2012 ST-Ericsson AB
3
- * License terms: GNU General Public License (GPL) version 2
4
4
  * ST DDC I2C master mode driver, used in e.g. U300 series platforms.
5
5
  * Author: Linus Walleij <linus.walleij@stericsson.com>
6
6
  * Author: Jonas Aaberg <jonas.aberg@stericsson.com>
..
..
@@ -132,7 +132,7 @@
132
132
 #define NUM_ADDR_RESEND_ATTEMPTS 12
133
133
 
134
134
 /* I2C clock speed, in Hz 0-400kHz*/
135
-static unsigned int scl_frequency = 100000;
135
+static unsigned int scl_frequency = I2C_MAX_STANDARD_MODE_FREQ;
136
136
 module_param(scl_frequency, uint,  0644);
137
137
 
138
138
 /**
..
..
@@ -328,12 +328,6 @@
328
328
 {
329
329
 	int ret;
330
330
 
331
-	if (unlikely(irqs_disabled())) {
332
-		/* TODO: implement polling for this case if need be. */
333
-		WARN(1, "irqs are disabled, cannot poll for event\n");
334
-		return -EIO;
335
-	}
336
-
337
331
 	/* Lock command issue, fill in an event we wait for */
338
332
 	spin_lock_irq(&dev->cmd_issue_lock);
339
333
 	init_completion(&dev->cmd_complete);
..
..
@@ -379,13 +373,6 @@
379
373
 				enum stu300_event mr_event)
380
374
 {
381
375
 	int ret;
382
-
383
-	if (unlikely(irqs_disabled())) {
384
-		/* TODO: implement polling for this case if need be. */
385
-		dev_err(&dev->pdev->dev, "irqs are disabled on this "
386
-			"system!\n");
387
-		return -EIO;
388
-	}
389
376
 
390
377
 	/* Is it already here? */
391
378
 	spin_lock_irq(&dev->cmd_issue_lock);
..
..
@@ -457,7 +444,7 @@
457
444
 		       "Attempt: %d\n", i+1);
458
445
 
459
446
 		dev_err(&dev->pdev->dev, "base address = "
460
-			"0x%08x, reinit hardware\n", (u32) dev->virtbase);
447
+			"0x%p, reinit hardware\n", dev->virtbase);
461
448
 
462
449
 		(void) stu300_init_hw(dev);
463
450
 	}
..
..
@@ -510,7 +497,7 @@
510
497
 	dev_dbg(&dev->pdev->dev, "Clock rate %lu Hz, I2C bus speed %d Hz "
511
498
 		"virtbase %p\n", clkrate, dev->speed, dev->virtbase);
512
499
 
513
-	if (dev->speed > 100000)
500
+	if (dev->speed > I2C_MAX_STANDARD_MODE_FREQ)
514
501
 		/* Fast Mode I2C */
515
502
 		val = ((clkrate/dev->speed) - 9)/3 + 1;
516
503
 	else
..
..
@@ -531,7 +518,7 @@
531
518
 		return -EINVAL;
532
519
 	}
533
520
 
534
-	if (dev->speed > 100000) {
521
+	if (dev->speed > I2C_MAX_STANDARD_MODE_FREQ) {
535
522
 		/* CC6..CC0 */
536
523
 		stu300_wr8((val & I2C_CCR_CC_MASK) | I2C_CCR_FMSM,
537
524
 			   dev->virtbase + I2C_CCR);
..
..
@@ -846,6 +833,13 @@
846
833
 	return num;
847
834
 }
848
835
 
836
+static int stu300_xfer_todo(struct i2c_adapter *adap, struct i2c_msg *msgs, int num)
837
+{
838
+	/* TODO: implement polling for this case if need be. */
839
+	WARN(1, "%s: atomic transfers not implemented\n", dev_name(&adap->dev));
840
+	return -EOPNOTSUPP;
841
+}
842
+
849
843
 static u32 stu300_func(struct i2c_adapter *adap)
850
844
 {
851
845
 	/* This is the simplest thing you can think of... */
..
..
@@ -853,8 +847,9 @@
853
847
 }
854
848
 
855
849
 static const struct i2c_algorithm stu300_algo = {
856
-	.master_xfer	= stu300_xfer,
857
-	.functionality	= stu300_func,
850
+	.master_xfer = stu300_xfer,
851
+	.master_xfer_atomic = stu300_xfer_todo,
852
+	.functionality = stu300_func,
858
853
 };
859
854
 
860
855
 static const struct i2c_adapter_quirks stu300_quirks = {
..
..
@@ -865,7 +860,6 @@
865
860
 {
866
861
 	struct stu300_dev *dev;
867
862
 	struct i2c_adapter *adap;
868
-	struct resource *res;
869
863
 	int bus_nr;
870
864
 	int ret = 0;
871
865
 
..
..
@@ -881,8 +875,7 @@
881
875
 	}
882
876
 
883
877
 	dev->pdev = pdev;
884
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
885
-	dev->virtbase = devm_ioremap_resource(&pdev->dev, res);
878
+	dev->virtbase = devm_platform_ioremap_resource(pdev, 0);
886
879
 	dev_dbg(&pdev->dev, "initialize bus device I2C%d on virtual "
887
880
 		"base %p\n", bus_nr, dev->virtbase);
888
881
 	if (IS_ERR(dev->virtbase))