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2023-12-09 95099d4622f8cb224d94e314c7a8e0df60b13f87 
 kernel/drivers/irqchip/irq-renesas-irqc.c
....@@ -1,25 +1,12 @@
1
+// SPDX-License-Identifier: GPL-2.0
12 /*
23  * Renesas IRQC Driver
34  *
45  *  Copyright (C) 2013 Magnus Damm
5
- *
6
- * This program is free software; you can redistribute it and/or modify
7
- * it under the terms of the GNU General Public License as published by
8
- * the Free Software Foundation; either version 2 of the License
9
- *
10
- * This program is distributed in the hope that it will be useful,
11
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
12
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13
- * GNU General Public License for more details.
14
- *
15
- * You should have received a copy of the GNU General Public License
16
- * along with this program; if not, write to the Free Software
17
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
186  */
197 
208 #include <linux/init.h>
219 #include <linux/platform_device.h>
22
-#include <linux/spinlock.h>
2310 #include <linux/interrupt.h>
2411 #include <linux/ioport.h>
2512 #include <linux/io.h>
....@@ -60,7 +47,7 @@
6047 	void __iomem *cpu_int_base;
6148 	struct irqc_irq irq[IRQC_IRQ_MAX];
6249 	unsigned int number_of_irqs;
63
-	struct platform_device *pdev;
50
+	struct device *dev;
6451 	struct irq_chip_generic *gc;
6552 	struct irq_domain *irq_domain;
6653 	atomic_t wakeup_path;
....@@ -73,8 +60,7 @@
7360 
7461 static void irqc_dbg(struct irqc_irq *i, char *str)
7562 {
76
-	dev_dbg(&i->p->pdev->dev, "%s (%d:%d)\n",
77
-		str, i->requested_irq, i->hw_irq);
63
+	dev_dbg(i->p->dev, "%s (%d:%d)\n", str, i->requested_irq, i->hw_irq);
7864 }
7965 
8066 static unsigned char irqc_sense[IRQ_TYPE_SENSE_MASK + 1] = {
....@@ -137,33 +123,22 @@
137123 
138124 static int irqc_probe(struct platform_device *pdev)
139125 {
126
+	struct device *dev = &pdev->dev;
127
+	const char *name = dev_name(dev);
140128 	struct irqc_priv *p;
141
-	struct resource *io;
142129 	struct resource *irq;
143
-	const char *name = dev_name(&pdev->dev);
144130 	int ret;
145131 	int k;
146132 
147
-	p = kzalloc(sizeof(*p), GFP_KERNEL);
148
-	if (!p) {
149
-		dev_err(&pdev->dev, "failed to allocate driver data\n");
150
-		ret = -ENOMEM;
151
-		goto err0;
152
-	}
133
+	p = devm_kzalloc(dev, sizeof(*p), GFP_KERNEL);
134
+	if (!p)
135
+		return -ENOMEM;
153136 
154
-	p->pdev = pdev;
137
+	p->dev = dev;
155138 	platform_set_drvdata(pdev, p);
156139 
157
-	pm_runtime_enable(&pdev->dev);
158
-	pm_runtime_get_sync(&pdev->dev);
159
-
160
-	/* get hold of manadatory IOMEM */
161
-	io = platform_get_resource(pdev, IORESOURCE_MEM, 0);
162
-	if (!io) {
163
-		dev_err(&pdev->dev, "not enough IOMEM resources\n");
164
-		ret = -EINVAL;
165
-		goto err1;
166
-	}
140
+	pm_runtime_enable(dev);
141
+	pm_runtime_get_sync(dev);
167142 
168143 	/* allow any number of IRQs between 1 and IRQC_IRQ_MAX */
169144 	for (k = 0; k < IRQC_IRQ_MAX; k++) {
....@@ -178,42 +153,41 @@
178153 
179154 	p->number_of_irqs = k;
180155 	if (p->number_of_irqs < 1) {
181
-		dev_err(&pdev->dev, "not enough IRQ resources\n");
156
+		dev_err(dev, "not enough IRQ resources\n");
182157 		ret = -EINVAL;
183
-		goto err1;
158
+		goto err_runtime_pm_disable;
184159 	}
185160 
186161 	/* ioremap IOMEM and setup read/write callbacks */
187
-	p->iomem = ioremap_nocache(io->start, resource_size(io));
188
-	if (!p->iomem) {
189
-		dev_err(&pdev->dev, "failed to remap IOMEM\n");
190
-		ret = -ENXIO;
191
-		goto err2;
162
+	p->iomem = devm_platform_ioremap_resource(pdev, 0);
163
+	if (IS_ERR(p->iomem)) {
164
+		ret = PTR_ERR(p->iomem);
165
+		goto err_runtime_pm_disable;
192166 	}
193167 
194168 	p->cpu_int_base = p->iomem + IRQC_INT_CPU_BASE(0); /* SYS-SPI */
195169 
196
-	p->irq_domain = irq_domain_add_linear(pdev->dev.of_node,
197
-					      p->number_of_irqs,
170
+	p->irq_domain = irq_domain_add_linear(dev->of_node, p->number_of_irqs,
198171 					      &irq_generic_chip_ops, p);
199172 	if (!p->irq_domain) {
200173 		ret = -ENXIO;
201
-		dev_err(&pdev->dev, "cannot initialize irq domain\n");
202
-		goto err2;
174
+		dev_err(dev, "cannot initialize irq domain\n");
175
+		goto err_runtime_pm_disable;
203176 	}
204177 
205178 	ret = irq_alloc_domain_generic_chips(p->irq_domain, p->number_of_irqs,
206
-					     1, name, handle_level_irq,
179
+					     1, "irqc", handle_level_irq,
207180 					     0, 0, IRQ_GC_INIT_NESTED_LOCK);
208181 	if (ret) {
209
-		dev_err(&pdev->dev, "cannot allocate generic chip\n");
210
-		goto err3;
182
+		dev_err(dev, "cannot allocate generic chip\n");
183
+		goto err_remove_domain;
211184 	}
212185 
213186 	p->gc = irq_get_domain_generic_chip(p->irq_domain, 0);
214187 	p->gc->reg_base = p->cpu_int_base;
215188 	p->gc->chip_types[0].regs.enable = IRQC_EN_SET;
216189 	p->gc->chip_types[0].regs.disable = IRQC_EN_STS;
190
+	p->gc->chip_types[0].chip.parent_device = dev;
217191 	p->gc->chip_types[0].chip.irq_mask = irq_gc_mask_disable_reg;
218192 	p->gc->chip_types[0].chip.irq_unmask = irq_gc_unmask_enable_reg;
219193 	p->gc->chip_types[0].chip.irq_set_type	= irqc_irq_set_type;
....@@ -222,46 +196,33 @@
222196 
223197 	/* request interrupts one by one */
224198 	for (k = 0; k < p->number_of_irqs; k++) {
225
-		if (request_irq(p->irq[k].requested_irq, irqc_irq_handler,
226
-				0, name, &p->irq[k])) {
227
-			dev_err(&pdev->dev, "failed to request IRQ\n");
199
+		if (devm_request_irq(dev, p->irq[k].requested_irq,
200
+				     irqc_irq_handler, 0, name, &p->irq[k])) {
201
+			dev_err(dev, "failed to request IRQ\n");
228202 			ret = -ENOENT;
229
-			goto err4;
203
+			goto err_remove_domain;
230204 		}
231205 	}
232206 
233
-	dev_info(&pdev->dev, "driving %d irqs\n", p->number_of_irqs);
207
+	dev_info(dev, "driving %d irqs\n", p->number_of_irqs);
234208 
235209 	return 0;
236
-err4:
237
-	while (--k >= 0)
238
-		free_irq(p->irq[k].requested_irq, &p->irq[k]);
239210 
240
-err3:
211
+err_remove_domain:
241212 	irq_domain_remove(p->irq_domain);
242
-err2:
243
-	iounmap(p->iomem);
244
-err1:
245
-	pm_runtime_put(&pdev->dev);
246
-	pm_runtime_disable(&pdev->dev);
247
-	kfree(p);
248
-err0:
213
+err_runtime_pm_disable:
214
+	pm_runtime_put(dev);
215
+	pm_runtime_disable(dev);
249216 	return ret;
250217 }
251218 
252219 static int irqc_remove(struct platform_device *pdev)
253220 {
254221 	struct irqc_priv *p = platform_get_drvdata(pdev);
255
-	int k;
256
-
257
-	for (k = 0; k < p->number_of_irqs; k++)
258
-		free_irq(p->irq[k].requested_irq, &p->irq[k]);
259222 
260223 	irq_domain_remove(p->irq_domain);
261
-	iounmap(p->iomem);
262224 	pm_runtime_put(&pdev->dev);
263225 	pm_runtime_disable(&pdev->dev);
264
-	kfree(p);
265226 	return 0;
266227 }
267228