8  * Baikal-T1 CM2 L2-cache Control Block driver.
38  * struct l2_ctl - Baikal-T1 L2 Control block private data.
49  * enum l2_ctl_stall - Baikal-T1 L2-cache-RAM stall identifier.
61  * struct l2_ctl_device_attribute - Baikal-T1 L2-cache device attribute.
63  * @id: L2-cache stall field identifier.
77 static int l2_ctl_get_latency(struct l2_ctl *l2, enum l2_ctl_stall id, u32 *val)  in l2_ctl_get_latency()  argument
82 	ret = regmap_read(l2->sys_regs, L2_CTL_REG, &data);  in l2_ctl_get_latency()
103 static int l2_ctl_set_latency(struct l2_ctl *l2, enum l2_ctl_stall id, u32 val)  in l2_ctl_set_latency()  argument
130 	ret = regmap_update_bits(l2->sys_regs, L2_CTL_REG, mask, data);  in l2_ctl_set_latency()
134 	return regmap_read_poll_timeout(l2->sys_regs, L2_CTL_REG, data,  in l2_ctl_set_latency()
142 	struct l2_ctl *l2 = data;  in l2_ctl_clear_data()  local
143 	struct platform_device *pdev = to_platform_device(l2->dev);  in l2_ctl_clear_data()
151 	struct l2_ctl *l2;  in l2_ctl_create_data()  local
154 	l2 = devm_kzalloc(dev, sizeof(*l2), GFP_KERNEL);  in l2_ctl_create_data()
155 	if (!l2)  in l2_ctl_create_data()
158 	ret = devm_add_action(dev, l2_ctl_clear_data, l2);  in l2_ctl_create_data()
160 		dev_err(dev, "Can't add L2 CTL data clear action\n");  in l2_ctl_create_data()
164 	l2->dev = dev;  in l2_ctl_create_data()
165 	platform_set_drvdata(pdev, l2);  in l2_ctl_create_data()
167 	return l2;  in l2_ctl_create_data()
170 static int l2_ctl_find_sys_regs(struct l2_ctl *l2)  in l2_ctl_find_sys_regs()  argument
172 	l2->sys_regs = syscon_node_to_regmap(l2->dev->of_node->parent);  in l2_ctl_find_sys_regs()
173 	if (IS_ERR(l2->sys_regs)) {  in l2_ctl_find_sys_regs()
174 		dev_err(l2->dev, "Couldn't get L2 CTL register map\n");  in l2_ctl_find_sys_regs()
175 		return PTR_ERR(l2->sys_regs);  in l2_ctl_find_sys_regs()
181 static int l2_ctl_of_parse_property(struct l2_ctl *l2, enum l2_ctl_stall id,  in l2_ctl_of_parse_property()  argument
187 	if (!of_property_read_u32(l2->dev->of_node, propname, &data)) {  in l2_ctl_of_parse_property()
188 		ret = l2_ctl_set_latency(l2, id, data);  in l2_ctl_of_parse_property()
190 			dev_err(l2->dev, "Invalid value of '%s'\n", propname);  in l2_ctl_of_parse_property()
196 static int l2_ctl_of_parse(struct l2_ctl *l2)  in l2_ctl_of_parse()  argument
200 	ret = l2_ctl_of_parse_property(l2, L2_WS_STALL, "baikal,l2-ws-latency");  in l2_ctl_of_parse()
204 	ret = l2_ctl_of_parse_property(l2, L2_TAG_STALL, "baikal,l2-tag-latency");  in l2_ctl_of_parse()
208 	return l2_ctl_of_parse_property(l2, L2_DATA_STALL,  in l2_ctl_of_parse()
209 					"baikal,l2-data-latency");  in l2_ctl_of_parse()
217 	struct l2_ctl *l2 = dev_get_drvdata(dev);  in l2_ctl_latency_show()  local
221 	ret = l2_ctl_get_latency(l2, devattr->id, &data);  in l2_ctl_latency_show()
233 	struct l2_ctl *l2 = dev_get_drvdata(dev);  in l2_ctl_latency_store()  local
240 	ret = l2_ctl_set_latency(l2, devattr->id, data);  in l2_ctl_latency_store()
261 	struct l2_ctl *l2 = data;  in l2_ctl_remove_sysfs()  local
263 	device_remove_groups(l2->dev, l2_ctl_sysfs_groups);  in l2_ctl_remove_sysfs()
266 static int l2_ctl_init_sysfs(struct l2_ctl *l2)  in l2_ctl_init_sysfs()  argument
270 	ret = device_add_groups(l2->dev, l2_ctl_sysfs_groups);  in l2_ctl_init_sysfs()
272 		dev_err(l2->dev, "Failed to create L2 CTL sysfs nodes\n");  in l2_ctl_init_sysfs()
276 	ret = devm_add_action_or_reset(l2->dev, l2_ctl_remove_sysfs, l2);  in l2_ctl_init_sysfs()
278 		dev_err(l2->dev, "Can't add L2 CTL sysfs remove action\n");  in l2_ctl_init_sysfs()
285 	struct l2_ctl *l2;  in l2_ctl_probe()  local
288 	l2 = l2_ctl_create_data(pdev);  in l2_ctl_probe()
289 	if (IS_ERR(l2))  in l2_ctl_probe()
290 		return PTR_ERR(l2);  in l2_ctl_probe()
292 	ret = l2_ctl_find_sys_regs(l2);  in l2_ctl_probe()
296 	ret = l2_ctl_of_parse(l2);  in l2_ctl_probe()
300 	ret = l2_ctl_init_sysfs(l2);  in l2_ctl_probe()
308 	{ .compatible = "baikal,bt1-l2-ctl" },
316 		.name = "bt1-l2-ctl",
323 MODULE_DESCRIPTION("Baikal-T1 L2-cache driver");