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()
74 	struct device_node *np = pdev->dev.of_node;  in cc770_get_of_node_data()
76 	of_property_read_u32(np, "bosch,external-clock-frequency", &clkext);  in cc770_get_of_node_data()
77 	priv->can.clock.freq = clkext;  in cc770_get_of_node_data()
80 	if (priv->can.clock.freq > 10000000) {  in cc770_get_of_node_data()
81 		priv->cpu_interface |= CPUIF_DSC;  in cc770_get_of_node_data()
82 		priv->can.clock.freq /= 2;  in cc770_get_of_node_data()
86 	if (priv->can.clock.freq > 8000000)  in cc770_get_of_node_data()
87 		priv->cpu_interface |= CPUIF_DMC;  in cc770_get_of_node_data()
89 	if (of_property_read_bool(np, "bosch,divide-memory-clock"))  in cc770_get_of_node_data()
90 		priv->cpu_interface |= CPUIF_DMC;  in cc770_get_of_node_data()
91 	if (of_property_read_bool(np, "bosch,iso-low-speed-mux"))  in cc770_get_of_node_data()
92 		priv->cpu_interface |= CPUIF_MUX;  in cc770_get_of_node_data()
94 	if (!of_property_read_bool(np, "bosch,no-comperator-bypass"))  in cc770_get_of_node_data()
95 		priv->bus_config |= BUSCFG_CBY;  in cc770_get_of_node_data()
96 	if (of_property_read_bool(np, "bosch,disconnect-rx0-input"))  in cc770_get_of_node_data()
97 		priv->bus_config |= BUSCFG_DR0;  in cc770_get_of_node_data()
98 	if (of_property_read_bool(np, "bosch,disconnect-rx1-input"))  in cc770_get_of_node_data()
99 		priv->bus_config |= BUSCFG_DR1;  in cc770_get_of_node_data()
100 	if (of_property_read_bool(np, "bosch,disconnect-tx1-output"))  in cc770_get_of_node_data()
101 		priv->bus_config |= BUSCFG_DT1;  in cc770_get_of_node_data()
102 	if (of_property_read_bool(np, "bosch,polarity-dominant"))  in cc770_get_of_node_data()
103 		priv->bus_config |= BUSCFG_POL;  in cc770_get_of_node_data()
105 	of_property_read_u32(np, "bosch,clock-out-frequency", &clkout);  in cc770_get_of_node_data()
112 			priv->cpu_interface |= CPUIF_CEN;  in cc770_get_of_node_data()
113 			priv->clkout |= (cdv - 1) & CLKOUT_CD_MASK;  in cc770_get_of_node_data()
115 			if (of_property_read_u32(np, "bosch,slew-rate", &slew)) {  in cc770_get_of_node_data()
118 					CLKOUT_SL_SHIFT) -  in cc770_get_of_node_data()
119 					((cdv * clkext - 1) / 8000000);  in cc770_get_of_node_data()
123 			priv->clkout |= (slew << CLKOUT_SL_SHIFT) &  in cc770_get_of_node_data()
126 			dev_dbg(&pdev->dev, "invalid clock-out-frequency\n");  in cc770_get_of_node_data()
137 	struct cc770_platform_data *pdata = dev_get_platdata(&pdev->dev);  in cc770_get_platform_data()
139 	priv->can.clock.freq = pdata->osc_freq;  in cc770_get_platform_data()
140 	if (priv->cpu_interface & CPUIF_DSC)  in cc770_get_platform_data()
141 		priv->can.clock.freq /= 2;  in cc770_get_platform_data()
142 	priv->clkout = pdata->cor;  in cc770_get_platform_data()
143 	priv->bus_config = pdata->bcr;  in cc770_get_platform_data()
144 	priv->cpu_interface = pdata->cir;  in cc770_get_platform_data()
161 		return -ENODEV;  in cc770_platform_probe()
164 	if (!request_mem_region(mem->start, mem_size, pdev->name))  in cc770_platform_probe()
165 		return -EBUSY;  in cc770_platform_probe()
167 	base = ioremap(mem->start, mem_size);  in cc770_platform_probe()
169 		err = -ENOMEM;  in cc770_platform_probe()
175 		err = -ENOMEM;  in cc770_platform_probe()
179 	dev->irq = irq;  in cc770_platform_probe()
181 	priv->read_reg = cc770_platform_read_reg;  in cc770_platform_probe()
182 	priv->write_reg = cc770_platform_write_reg;  in cc770_platform_probe()
183 	priv->irq_flags = IRQF_SHARED;  in cc770_platform_probe()
184 	priv->reg_base = base;  in cc770_platform_probe()
186 	if (pdev->dev.of_node)  in cc770_platform_probe()
188 	else if (dev_get_platdata(&pdev->dev))  in cc770_platform_probe()
191 		err = -ENODEV;  in cc770_platform_probe()
195 	dev_dbg(&pdev->dev,  in cc770_platform_probe()
198 		 priv->reg_base, dev->irq, priv->can.clock.freq,  in cc770_platform_probe()
199 		 priv->cpu_interface, priv->bus_config, priv->clkout);  in cc770_platform_probe()
202 	SET_NETDEV_DEV(dev, &pdev->dev);  in cc770_platform_probe()
206 		dev_err(&pdev->dev,  in cc770_platform_probe()
218 	release_mem_region(mem->start, mem_size);  in cc770_platform_probe()
230 	iounmap(priv->reg_base);  in cc770_platform_remove()
234 	release_mem_region(mem->start, resource_size(mem));  in cc770_platform_remove()
239 	{.compatible = "intc,82527"},  /* AN82527 from Intel CP */