1 // SPDX-License-Identifier: GPL-2.0-only
10  * in your board-specific code:
29  *           interrupt-parent = <&mpic>;
30  *           bosch,external-clock-frequency = <16000000>;
53 MODULE_DESCRIPTION("Socket-CAN driver for CC770 on the platform bus");
61 	return ioread8(priv->reg_base + reg);  in cc770_platform_read_reg()
67 	iowrite8(val, priv->reg_base + reg);  in cc770_platform_write_reg()
73 	struct device_node *np = pdev->dev.of_node;  in cc770_get_of_node_data()
78 	prop = of_get_property(np, "bosch,external-clock-frequency",  in cc770_get_of_node_data()
84 	priv->can.clock.freq = clkext;  in cc770_get_of_node_data()
86 	/* The system clock may not exceed 10 MHz */  in cc770_get_of_node_data()
87 	if (priv->can.clock.freq > 10000000) {  in cc770_get_of_node_data()
88 		priv->cpu_interface |= CPUIF_DSC;  in cc770_get_of_node_data()
89 		priv->can.clock.freq /= 2;  in cc770_get_of_node_data()
92 	/* The memory clock may not exceed 8 MHz */  in cc770_get_of_node_data()
93 	if (priv->can.clock.freq > 8000000)  in cc770_get_of_node_data()
94 		priv->cpu_interface |= CPUIF_DMC;  in cc770_get_of_node_data()
96 	if (of_get_property(np, "bosch,divide-memory-clock", NULL))  in cc770_get_of_node_data()
97 		priv->cpu_interface |= CPUIF_DMC;  in cc770_get_of_node_data()
98 	if (of_get_property(np, "bosch,iso-low-speed-mux", NULL))  in cc770_get_of_node_data()
99 		priv->cpu_interface |= CPUIF_MUX;  in cc770_get_of_node_data()
101 	if (!of_get_property(np, "bosch,no-comperator-bypass", NULL))  in cc770_get_of_node_data()
102 		priv->bus_config |= BUSCFG_CBY;  in cc770_get_of_node_data()
103 	if (of_get_property(np, "bosch,disconnect-rx0-input", NULL))  in cc770_get_of_node_data()
104 		priv->bus_config |= BUSCFG_DR0;  in cc770_get_of_node_data()
105 	if (of_get_property(np, "bosch,disconnect-rx1-input", NULL))  in cc770_get_of_node_data()
106 		priv->bus_config |= BUSCFG_DR1;  in cc770_get_of_node_data()
107 	if (of_get_property(np, "bosch,disconnect-tx1-output", NULL))  in cc770_get_of_node_data()
108 		priv->bus_config |= BUSCFG_DT1;  in cc770_get_of_node_data()
109 	if (of_get_property(np, "bosch,polarity-dominant", NULL))  in cc770_get_of_node_data()
110 		priv->bus_config |= BUSCFG_POL;  in cc770_get_of_node_data()
112 	prop = of_get_property(np, "bosch,clock-out-frequency", &prop_size);  in cc770_get_of_node_data()
118 			priv->cpu_interface |= CPUIF_CEN;  in cc770_get_of_node_data()
119 			priv->clkout |= (cdv - 1) & CLKOUT_CD_MASK;  in cc770_get_of_node_data()
121 			prop = of_get_property(np, "bosch,slew-rate",  in cc770_get_of_node_data()
128 					CLKOUT_SL_SHIFT) -  in cc770_get_of_node_data()
129 					((cdv * clkext - 1) / 8000000);  in cc770_get_of_node_data()
133 			priv->clkout |= (slew << CLKOUT_SL_SHIFT) &  in cc770_get_of_node_data()
136 			dev_dbg(&pdev->dev, "invalid clock-out-frequency\n");  in cc770_get_of_node_data()
147 	struct cc770_platform_data *pdata = dev_get_platdata(&pdev->dev);  in cc770_get_platform_data()
149 	priv->can.clock.freq = pdata->osc_freq;  in cc770_get_platform_data()
150 	if (priv->cpu_interface & CPUIF_DSC)  in cc770_get_platform_data()
151 		priv->can.clock.freq /= 2;  in cc770_get_platform_data()
152 	priv->clkout = pdata->cor;  in cc770_get_platform_data()
153 	priv->bus_config = pdata->bcr;  in cc770_get_platform_data()
154 	priv->cpu_interface = pdata->cir;  in cc770_get_platform_data()
171 		return -ENODEV;  in cc770_platform_probe()
174 	if (!request_mem_region(mem->start, mem_size, pdev->name))  in cc770_platform_probe()
175 		return -EBUSY;  in cc770_platform_probe()
177 	base = ioremap(mem->start, mem_size);  in cc770_platform_probe()
179 		err = -ENOMEM;  in cc770_platform_probe()
185 		err = -ENOMEM;  in cc770_platform_probe()
189 	dev->irq = irq;  in cc770_platform_probe()
191 	priv->read_reg = cc770_platform_read_reg;  in cc770_platform_probe()
192 	priv->write_reg = cc770_platform_write_reg;  in cc770_platform_probe()
193 	priv->irq_flags = IRQF_SHARED;  in cc770_platform_probe()
194 	priv->reg_base = base;  in cc770_platform_probe()
196 	if (pdev->dev.of_node)  in cc770_platform_probe()
198 	else if (dev_get_platdata(&pdev->dev))  in cc770_platform_probe()
201 		err = -ENODEV;  in cc770_platform_probe()
205 	dev_dbg(&pdev->dev,  in cc770_platform_probe()
206 		 "reg_base=0x%p irq=%d clock=%d cpu_interface=0x%02x "  in cc770_platform_probe()
208 		 priv->reg_base, dev->irq, priv->can.clock.freq,  in cc770_platform_probe()
209 		 priv->cpu_interface, priv->bus_config, priv->clkout);  in cc770_platform_probe()
212 	SET_NETDEV_DEV(dev, &pdev->dev);  in cc770_platform_probe()
216 		dev_err(&pdev->dev,  in cc770_platform_probe()
228 	release_mem_region(mem->start, mem_size);  in cc770_platform_probe()
240 	iounmap(priv->reg_base);  in cc770_platform_remove()
244 	release_mem_region(mem->start, resource_size(mem));  in cc770_platform_remove()