1 // SPDX-License-Identifier: GPL-2.0-only
3  * DDR Self-Refresh Power Down (SRPD) support for Broadcom STB SoCs
38 	void __iomem *config = memc->ddr_ctrl + REG_MEMC_CNTRLR_CONFIG;  in brcmstb_memc_uses_lpddr4()  local
41 	reg = readl_relaxed(config) & CNTRLR_CONFIG_MASK;  in brcmstb_memc_uses_lpddr4()
49 	void __iomem *cfg = memc->ddr_ctrl + memc->srpd_offset;  in brcmstb_memc_srpd_config()
54 		return -EINVAL;  in brcmstb_memc_srpd_config()
56 	memc->timeout_cycles = cycles;  in brcmstb_memc_srpd_config()
74 	return sprintf(buf, "%d\n", memc->frequency);  in frequency_show()
82 	return sprintf(buf, "%d\n", memc->timeout_cycles);  in srpd_show()
98 		return -EOPNOTSUPP;  in srpd_store()
130 	struct device *dev = &pdev->dev;  in brcmstb_memc_probe()
136 		return -ENOMEM;  in brcmstb_memc_probe()
141 	memc_data = of_id->data;  in brcmstb_memc_probe()
142 	memc->srpd_offset = memc_data->srpd_offset;  in brcmstb_memc_probe()
144 	memc->ddr_ctrl = devm_platform_ioremap_resource(pdev, 0);  in brcmstb_memc_probe()
145 	if (IS_ERR(memc->ddr_ctrl))  in brcmstb_memc_probe()
146 		return PTR_ERR(memc->ddr_ctrl);  in brcmstb_memc_probe()
148 	of_property_read_u32(pdev->dev.of_node, "clock-frequency",  in brcmstb_memc_probe()
149 			     &memc->frequency);  in brcmstb_memc_probe()
151 	ret = sysfs_create_group(&dev->kobj, &dev_attr_group);  in brcmstb_memc_probe()
160 	struct device *dev = &pdev->dev;  in brcmstb_memc_remove()
162 	sysfs_remove_group(&dev->kobj, &dev_attr_group);  in brcmstb_memc_remove()
181 		.compatible = "brcm,brcmstb-memc-ddr-rev-b.1.x",
185 		.compatible = "brcm,brcmstb-memc-ddr-rev-b.2.0",
189 		.compatible = "brcm,brcmstb-memc-ddr-rev-b.2.1",
193 		.compatible = "brcm,brcmstb-memc-ddr-rev-b.2.2",
197 		.compatible = "brcm,brcmstb-memc-ddr-rev-b.2.3",
201 		.compatible = "brcm,brcmstb-memc-ddr-rev-b.2.5",
205 		.compatible = "brcm,brcmstb-memc-ddr-rev-b.2.6",
209 		.compatible = "brcm,brcmstb-memc-ddr-rev-b.2.7",
213 		.compatible = "brcm,brcmstb-memc-ddr-rev-b.2.8",
217 		.compatible = "brcm,brcmstb-memc-ddr-rev-b.3.0",
221 		.compatible = "brcm,brcmstb-memc-ddr-rev-b.3.1",
225 		.compatible = "brcm,brcmstb-memc-ddr-rev-c.1.0",
229 		.compatible = "brcm,brcmstb-memc-ddr-rev-c.1.1",
233 		.compatible = "brcm,brcmstb-memc-ddr-rev-c.1.2",
237 		.compatible = "brcm,brcmstb-memc-ddr-rev-c.1.3",
241 		.compatible = "brcm,brcmstb-memc-ddr-rev-c.1.4",
246 		.compatible = "brcm,brcmstb-memc-ddr",
255 	void __iomem *cfg = memc->ddr_ctrl + memc->srpd_offset;  in brcmstb_memc_suspend()
258 	if (memc->timeout_cycles == 0)  in brcmstb_memc_suspend()
279 	if (memc->timeout_cycles == 0)  in brcmstb_memc_resume()
282 	return brcmstb_memc_srpd_config(memc, memc->timeout_cycles);  in brcmstb_memc_resume()
301 MODULE_DESCRIPTION("DDR SRPD driver for Broadcom STB chips");