11 #include <linux/clk.h>
19 #include <linux/mfd/syscon/imx6q-iomuxc-gpr.h>
78 	{ .compatible = "fsl,imx1-weim", .data = &imx1_weim_devtype, },
80 	{ .compatible = "fsl,imx27-weim", .data = &imx27_weim_devtype, },
82 	{ .compatible = "fsl,imx50-weim", .data = &imx50_weim_devtype, },
83 	{ .compatible = "fsl,imx6q-weim", .data = &imx50_weim_devtype, },
85 	{ .compatible = "fsl,imx51-weim", .data = &imx51_weim_devtype, },
92 	struct device_node *np = pdev->dev.of_node;  in imx_weim_gpr_setup()
107 	gpr = syscon_regmap_lookup_by_phandle(np, "fsl,weim-cs-gpr");  in imx_weim_gpr_setup()
109 		dev_dbg(&pdev->dev, "failed to find weim-cs-gpr\n");  in imx_weim_gpr_setup()
135 	dev_err(&pdev->dev, "Invalid 'ranges' configuration\n");  in imx_weim_gpr_setup()
136 	return -EINVAL;  in imx_weim_gpr_setup()
151 	if (WARN_ON(devtype->cs_regs_count > MAX_CS_REGS_COUNT))  in weim_timing_setup()
152 		return -EINVAL;  in weim_timing_setup()
153 	if (WARN_ON(devtype->cs_count > MAX_CS_COUNT))  in weim_timing_setup()
154 		return -EINVAL;  in weim_timing_setup()
157 	base = priv->base;  in weim_timing_setup()
158 	ts = &priv->timing_state;  in weim_timing_setup()
160 	ret = of_property_read_u32_array(np, "fsl,weim-cs-timing",  in weim_timing_setup()
161 					 value, devtype->cs_regs_count);  in weim_timing_setup()
173 		return -EINVAL;  in weim_timing_setup()
181 		if (cs_idx >= devtype->cs_count)  in weim_timing_setup()
182 			return -EINVAL;  in weim_timing_setup()
184 		/* prevent re-configuring a CS that's already been configured */  in weim_timing_setup()
185 		cst = &ts->cs[cs_idx];  in weim_timing_setup()
186 		if (cst->is_applied && memcmp(value, cst->regs,  in weim_timing_setup()
187 					devtype->cs_regs_count * sizeof(u32))) {  in weim_timing_setup()
188 			dev_err(dev, "fsl,weim-cs-timing conflict on %pOF", np);  in weim_timing_setup()
189 			return -EINVAL;  in weim_timing_setup()
193 		for (i = 0; i < devtype->cs_regs_count; i++)  in weim_timing_setup()
195 				base + cs_idx * devtype->cs_stride + i * 4);  in weim_timing_setup()
196 		if (!cst->is_applied) {  in weim_timing_setup()
197 			cst->is_applied = true;  in weim_timing_setup()
198 			memcpy(cst->regs, value,  in weim_timing_setup()
199 				devtype->cs_regs_count * sizeof(u32));  in weim_timing_setup()
208 	const struct imx_weim_devtype *devtype = device_get_match_data(&pdev->dev);  in weim_parse_dt()
221 	priv = dev_get_drvdata(&pdev->dev);  in weim_parse_dt()
222 	base = priv->base;  in weim_parse_dt()
224 	if (of_property_read_bool(pdev->dev.of_node, "fsl,burst-clk-enable")) {  in weim_parse_dt()
225 		if (devtype->wcr_bcm) {  in weim_parse_dt()
226 			reg = readl(base + devtype->wcr_offset);  in weim_parse_dt()
227 			reg |= devtype->wcr_bcm;  in weim_parse_dt()
229 			if (of_property_read_bool(pdev->dev.of_node,  in weim_parse_dt()
230 						"fsl,continuous-burst-clk")) {  in weim_parse_dt()
231 				if (devtype->wcr_cont_bclk) {  in weim_parse_dt()
232 					reg |= devtype->wcr_cont_bclk;  in weim_parse_dt()
234 					dev_err(&pdev->dev,  in weim_parse_dt()
235 						"continuous burst clk not supported.\n");  in weim_parse_dt()
236 					return -EINVAL;  in weim_parse_dt()
240 			writel(reg, base + devtype->wcr_offset);  in weim_parse_dt()
242 			dev_err(&pdev->dev, "burst clk mode not supported.\n");  in weim_parse_dt()
243 			return -EINVAL;  in weim_parse_dt()
247 	for_each_available_child_of_node(pdev->dev.of_node, child) {  in weim_parse_dt()
248 		ret = weim_timing_setup(&pdev->dev, child, devtype);  in weim_parse_dt()
250 			dev_warn(&pdev->dev, "%pOF set timing failed.\n",  in weim_parse_dt()
257 		ret = of_platform_default_populate(pdev->dev.of_node,  in weim_parse_dt()
258 						   NULL, &pdev->dev);  in weim_parse_dt()
260 		dev_err(&pdev->dev, "%pOF fail to create devices.\n",  in weim_parse_dt()
261 			pdev->dev.of_node);  in weim_parse_dt()
268 	struct clk *clk;  in weim_probe()  local
272 	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);  in weim_probe()
274 		return -ENOMEM;  in weim_probe()
281 	priv->base = base;  in weim_probe()
282 	dev_set_drvdata(&pdev->dev, priv);  in weim_probe()
285 	clk = devm_clk_get_enabled(&pdev->dev, NULL);  in weim_probe()
286 	if (IS_ERR(clk))  in weim_probe()
287 		return PTR_ERR(clk);  in weim_probe()
294 	dev_info(&pdev->dev, "Driver registered.\n");  in weim_probe()
311 		of_id = of_match_node(weim_id_table, rd->dn->parent);  in of_weim_notify()
315 		devtype = of_id->data;  in of_weim_notify()
317 		pdev = of_find_device_by_node(rd->dn->parent);  in of_weim_notify()
320 				__func__, rd->dn->parent);  in of_weim_notify()
322 			return notifier_from_errno(-EINVAL);  in of_weim_notify()
325 		if (weim_timing_setup(&pdev->dev, rd->dn, devtype))  in of_weim_notify()
326 			dev_warn(&pdev->dev,  in of_weim_notify()
327 				 "Failed to setup timing for '%pOF'\n", rd->dn);  in of_weim_notify()
329 		if (!of_node_check_flag(rd->dn, OF_POPULATED)) {  in of_weim_notify()
335 			rd->dn->fwnode.flags &= ~FWNODE_FLAG_NOT_DEVICE;  in of_weim_notify()
336 			if (!of_platform_device_create(rd->dn, NULL, &pdev->dev)) {  in of_weim_notify()
337 				dev_err(&pdev->dev,  in of_weim_notify()
339 					rd->dn);  in of_weim_notify()
340 				ret = notifier_from_errno(-EINVAL);  in of_weim_notify()
348 		if (!of_node_check_flag(rd->dn, OF_POPULATED))  in of_weim_notify()
351 		of_id = of_match_node(weim_id_table, rd->dn->parent);  in of_weim_notify()
355 		pdev = of_find_device_by_node(rd->dn);  in of_weim_notify()
358 				rd->dn);  in of_weim_notify()
360 			ret = notifier_from_errno(-EINVAL);  in of_weim_notify()
362 			of_platform_device_destroy(&pdev->dev, NULL);  in of_weim_notify()
381 		.name		= "imx-weim",