修改led为gpio

hc

2024-10-12 a5969cabbb4660eab42b6ef0412cbbd1200cf14d

 kernel/drivers/i2c/busses/i2c-iop3xx.c
..
..
@@ -1,3 +1,4 @@
1
+// SPDX-License-Identifier: GPL-2.0-only
1
2
 /* ------------------------------------------------------------------------- */
2
3
 /* i2c-iop3xx.c i2c driver algorithms for Intel XScale IOP3xx & IXP46x       */
3
4
 /* ------------------------------------------------------------------------- */
..
..
@@ -23,10 +24,6 @@
23
24
  *
24
25
  * - writing to slave address causes latchup on iop331.
25
26
  *	fix: driver refuses to address self.
26
- *
27
- * This program is free software; you can redistribute it and/or modify
28
- * it under the terms of the GNU General Public License as published by
29
- * the Free Software Foundation, version 2.
30
27
  */
31
28
 
32
29
 #include <linux/interrupt.h>
..
..
@@ -38,7 +35,7 @@
38
35
 #include <linux/platform_device.h>
39
36
 #include <linux/i2c.h>
40
37
 #include <linux/io.h>
41
-#include <linux/gpio.h>
38
+#include <linux/gpio/consumer.h>
42
39
 
43
40
 #include "i2c-iop3xx.h"
44
41
 
..
..
@@ -71,17 +68,16 @@
71
68
 
72
69
 	/*
73
70
 	 * Every time unit enable is asserted, GPOD needs to be cleared
74
-	 * on IOP3XX to avoid data corruption on the bus.
71
+	 * on IOP3XX to avoid data corruption on the bus. We use the
72
+	 * gpiod_set_raw_value() to make sure the 0 hits the hardware
73
+	 * GPOD register. These descriptors are only passed along to
74
+	 * the device if this is necessary.
75
75
 	 */
76
-#if defined(CONFIG_ARCH_IOP32X) || defined(CONFIG_ARCH_IOP33X)
77
-	if (iop3xx_adap->id == 0) {
78
-		gpio_set_value(7, 0);
79
-		gpio_set_value(6, 0);
80
-	} else {
81
-		gpio_set_value(5, 0);
82
-		gpio_set_value(4, 0);
83
-	}
84
-#endif
76
+	if (iop3xx_adap->gpio_scl)
77
+		gpiod_set_raw_value(iop3xx_adap->gpio_scl, 0);
78
+	if (iop3xx_adap->gpio_sda)
79
+		gpiod_set_raw_value(iop3xx_adap->gpio_sda, 0);
80
+
85
81
 	/* NB SR bits not same position as CR IE bits :-( */
86
82
 	iop3xx_adap->SR_enabled =
87
83
 		IOP3XX_ISR_ALD | IOP3XX_ISR_BERRD |
..
..
@@ -434,6 +430,21 @@
434
430
 		goto free_adapter;
435
431
 	}
436
432
 
433
+	adapter_data->gpio_scl = devm_gpiod_get_optional(&pdev->dev,
434
+							 "scl",
435
+							 GPIOD_ASIS);
436
+	if (IS_ERR(adapter_data->gpio_scl)) {
437
+		ret = PTR_ERR(adapter_data->gpio_scl);
438
+		goto free_both;
439
+	}
440
+	adapter_data->gpio_sda = devm_gpiod_get_optional(&pdev->dev,
441
+							 "sda",
442
+							 GPIOD_ASIS);
443
+	if (IS_ERR(adapter_data->gpio_sda)) {
444
+		ret = PTR_ERR(adapter_data->gpio_sda);
445
+		goto free_both;
446
+	}
447
+
437
448
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
438
449
 	if (!res) {
439
450
 		ret = -ENODEV;
..
..
@@ -469,6 +480,7 @@
469
480
 	new_adapter->owner = THIS_MODULE;
470
481
 	new_adapter->class = I2C_CLASS_HWMON | I2C_CLASS_SPD;
471
482
 	new_adapter->dev.parent = &pdev->dev;
483
+	new_adapter->dev.of_node = pdev->dev.of_node;
472
484
 	new_adapter->nr = pdev->id;
473
485
 
474
486
 	/*
..
..
@@ -506,12 +518,19 @@
506
518
 	return ret;
507
519
 }
508
520
 
521
+static const struct of_device_id i2c_iop3xx_match[] = {
522
+	{ .compatible = "intel,iop3xx-i2c", },
523
+	{ .compatible = "intel,ixp4xx-i2c", },
524
+	{},
525
+};
526
+MODULE_DEVICE_TABLE(of, i2c_iop3xx_match);
509
527
 
510
528
 static struct platform_driver iop3xx_i2c_driver = {
511
529
 	.probe		= iop3xx_i2c_probe,
512
530
 	.remove		= iop3xx_i2c_remove,
513
531
 	.driver		= {
514
532
 		.name	= "IOP3xx-I2C",
533
+		.of_match_table = i2c_iop3xx_match,
515
534
 	},
516
535
 };
517
536