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2024-05-10 37f49e37ab4cb5d0bc4c60eb5c6d4dd57db767bb

 kernel/drivers/staging/most/dim2/dim2.c
..
..
@@ -20,8 +20,7 @@
20
20
 #include <linux/dma-mapping.h>
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21
 #include <linux/sched.h>
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22
 #include <linux/kthread.h>
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-
24
-#include "most/core.h"
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+#include <linux/most.h>
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 #include "hal.h"
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 #include "errors.h"
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26
 #include "sysfs.h"
..
..
@@ -47,7 +46,7 @@
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 static DEFINE_SPINLOCK(dim_lock);
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47
 
49
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 static void dim2_tasklet_fn(unsigned long data);
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-static DECLARE_TASKLET(dim2_tasklet, dim2_tasklet_fn, 0);
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+static DECLARE_TASKLET_OLD(dim2_tasklet, dim2_tasklet_fn);
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50
 
52
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 /**
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  * struct hdm_channel - private structure to keep channel specific data
..
..
@@ -101,12 +100,12 @@
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 	struct medialb_bus bus;
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101
 	void (*on_netinfo)(struct most_interface *most_iface,
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102
 			   unsigned char link_state, unsigned char *addrs);
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-	void (*disable_platform)(struct platform_device *);
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+	void (*disable_platform)(struct platform_device *pdev);
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104
 };
106
105
 
107
106
 struct dim2_platform_data {
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-	int (*enable)(struct platform_device *);
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-	void (*disable)(struct platform_device *);
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+	int (*enable)(struct platform_device *pdev);
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+	void (*disable)(struct platform_device *pdev);
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109
 };
111
110
 
112
111
 #define iface_to_hdm(iface) container_of(iface, struct dim2_hdm, most_iface)
..
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@@ -116,7 +115,8 @@
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 	(((p)[1] == 0x18) && ((p)[2] == 0x05) && ((p)[3] == 0x0C) && \
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 	 ((p)[13] == 0x3C) && ((p)[14] == 0x00) && ((p)[15] == 0x0A))
118
117
 
119
-bool dim2_sysfs_get_state_cb(void)
118
+static ssize_t state_show(struct device *dev, struct device_attribute *attr,
119
+			  char *buf)
120
120
 {
121
121
 	bool state;
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122
 	unsigned long flags;
..
..
@@ -125,27 +125,17 @@
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 	state = dim_get_lock_state();
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 	spin_unlock_irqrestore(&dim_lock, flags);
127
127
 
128
-	return state;
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+	return sysfs_emit(buf, "%s\n", state ? "locked" : "");
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129
 }
130
130
 
131
-/**
132
- * dimcb_io_read - callback from HAL to read an I/O register
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- * @ptr32: register address
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- */
135
-u32 dimcb_io_read(u32 __iomem *ptr32)
136
-{
137
-	return readl(ptr32);
138
-}
131
+static DEVICE_ATTR_RO(state);
139
132
 
140
-/**
141
- * dimcb_io_write - callback from HAL to write value to an I/O register
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- * @ptr32: register address
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- * @value: value to write
144
- */
145
-void dimcb_io_write(u32 __iomem *ptr32, u32 value)
146
-{
147
-	writel(value, ptr32);
148
-}
133
+static struct attribute *dim2_attrs[] = {
134
+	&dev_attr_state.attr,
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+	NULL,
136
+};
137
+
138
+ATTRIBUTE_GROUPS(dim2);
149
139
 
150
140
 /**
151
141
  * dimcb_on_error - callback from HAL to report miscommunication between
..
..
@@ -733,6 +723,23 @@
733
723
 	return -EINVAL;
734
724
 }
735
725
 
726
+static void dim2_release(struct device *d)
727
+{
728
+	struct dim2_hdm *dev = container_of(d, struct dim2_hdm, dev);
729
+	unsigned long flags;
730
+
731
+	kthread_stop(dev->netinfo_task);
732
+
733
+	spin_lock_irqsave(&dim_lock, flags);
734
+	dim_shutdown();
735
+	spin_unlock_irqrestore(&dim_lock, flags);
736
+
737
+	if (dev->disable_platform)
738
+		dev->disable_platform(to_platform_device(d->parent));
739
+
740
+	kfree(dev);
741
+}
742
+
736
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 /*
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  * dim2_probe - dim2 probe handler
738
745
  * @pdev: platform device structure
..
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@@ -753,7 +760,7 @@
753
760
 
754
761
 	enum { MLB_INT_IDX, AHB0_INT_IDX };
755
762
 
756
-	dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
763
+	dev = kzalloc(sizeof(*dev), GFP_KERNEL);
757
764
 	if (!dev)
758
765
 		return -ENOMEM;
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766
 
..
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@@ -765,25 +772,27 @@
765
772
 				      "microchip,clock-speed", &clock_speed);
766
773
 	if (ret) {
767
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 		dev_err(&pdev->dev, "missing dt property clock-speed\n");
768
-		return ret;
775
+		goto err_free_dev;
769
776
 	}
770
777
 
771
778
 	ret = get_dim2_clk_speed(clock_speed, &dev->clk_speed);
772
779
 	if (ret) {
773
780
 		dev_err(&pdev->dev, "bad dt property clock-speed\n");
774
-		return ret;
781
+		goto err_free_dev;
775
782
 	}
776
783
 
777
784
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
778
785
 	dev->io_base = devm_ioremap_resource(&pdev->dev, res);
779
-	if (IS_ERR(dev->io_base))
780
-		return PTR_ERR(dev->io_base);
786
+	if (IS_ERR(dev->io_base)) {
787
+		ret = PTR_ERR(dev->io_base);
788
+		goto err_free_dev;
789
+	}
781
790
 
782
791
 	of_id = of_match_node(dim2_of_match, pdev->dev.of_node);
783
792
 	pdata = of_id->data;
784
793
 	ret = pdata && pdata->enable ? pdata->enable(pdev) : 0;
785
794
 	if (ret)
786
-		return ret;
795
+		goto err_free_dev;
787
796
 
788
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 	dev->disable_platform = pdata ? pdata->disable : NULL;
789
798
 
..
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@@ -797,7 +806,6 @@
797
806
 
798
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 	irq = platform_get_irq(pdev, AHB0_INT_IDX);
799
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 	if (irq < 0) {
800
-		dev_err(&pdev->dev, "failed to get ahb0_int irq: %d\n", irq);
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 		ret = irq;
802
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 		goto err_shutdown_dim;
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 	}
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@@ -811,7 +819,6 @@
811
819
 
812
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 	irq = platform_get_irq(pdev, MLB_INT_IDX);
813
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 	if (irq < 0) {
814
-		dev_err(&pdev->dev, "failed to get mlb_int irq: %d\n", irq);
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 		ret = irq;
816
823
 		goto err_shutdown_dim;
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824
 	}
..
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@@ -875,32 +882,20 @@
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 	dev->most_iface.poison_channel = poison_channel;
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 	dev->most_iface.request_netinfo = request_netinfo;
877
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 	dev->most_iface.driver_dev = &pdev->dev;
878
-	dev->dev.init_name = "dim2_state";
879
-	dev->dev.parent = &dev->most_iface.dev;
885
+	dev->most_iface.dev = &dev->dev;
886
+	dev->dev.init_name = dev->name;
887
+	dev->dev.parent = &pdev->dev;
888
+	dev->dev.release = dim2_release;
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889
 
881
-	ret = most_register_interface(&dev->most_iface);
882
-	if (ret) {
883
-		dev_err(&pdev->dev, "failed to register MOST interface\n");
884
-		goto err_stop_thread;
885
-	}
890
+	return most_register_interface(&dev->most_iface);
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891
 
887
-	ret = dim2_sysfs_probe(&dev->dev);
888
-	if (ret) {
889
-		dev_err(&pdev->dev, "failed to create sysfs attribute\n");
890
-		goto err_unreg_iface;
891
-	}
892
-
893
-	return 0;
894
-
895
-err_unreg_iface:
896
-	most_deregister_interface(&dev->most_iface);
897
-err_stop_thread:
898
-	kthread_stop(dev->netinfo_task);
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 err_shutdown_dim:
900
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 	dim_shutdown();
901
894
 err_disable_platform:
902
895
 	if (dev->disable_platform)
903
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 		dev->disable_platform(pdev);
897
+err_free_dev:
898
+	kfree(dev);
904
899
 
905
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 	return ret;
906
901
 }
..
..
@@ -914,18 +909,8 @@
914
909
 static int dim2_remove(struct platform_device *pdev)
915
910
 {
916
911
 	struct dim2_hdm *dev = platform_get_drvdata(pdev);
917
-	unsigned long flags;
918
912
 
919
-	dim2_sysfs_destroy(&dev->dev);
920
913
 	most_deregister_interface(&dev->most_iface);
921
-	kthread_stop(dev->netinfo_task);
922
-
923
-	spin_lock_irqsave(&dim_lock, flags);
924
-	dim_shutdown();
925
-	spin_unlock_irqrestore(&dim_lock, flags);
926
-
927
-	if (dev->disable_platform)
928
-		dev->disable_platform(pdev);
929
914
 
930
915
 	return 0;
931
916
 }
..
..
@@ -1100,6 +1085,7 @@
1100
1085
 	.driver = {
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1086
 		.name = "hdm_dim2",
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1087
 		.of_match_table = dim2_of_match,
1088
+		.dev_groups = dim2_groups,
1103
1089
 	},
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1090
 };
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