1 // SPDX-License-Identifier: GPL-2.0
6 // Exynos - SROM Controller support
17 #include "exynos-srom.h"
20 	/* SROM side */
29  * struct exynos_srom_reg_dump: register dump of SROM Controller registers.
30  * @offset: srom register offset from the controller base address.
39  * struct exynos_srom: platform data for exynos srom controller driver.
41  * @reg_base: srom base address
67 static int exynos_srom_configure_bank(struct exynos_srom *srom,  in exynos_srom_configure_bank()  argument
75 		return -EINVAL;  in exynos_srom_configure_bank()
76 	if (of_property_read_u32(np, "reg-io-width", &width))  in exynos_srom_configure_bank()
78 	if (of_property_read_bool(np, "samsung,srom-page-mode"))  in exynos_srom_configure_bank()
80 	if (of_property_read_u32_array(np, "samsung,srom-timing", timing,  in exynos_srom_configure_bank()
82 		return -EINVAL;  in exynos_srom_configure_bank()
90 	bw = readl_relaxed(srom->reg_base + EXYNOS_SROM_BW);  in exynos_srom_configure_bank()
92 	writel_relaxed(bw, srom->reg_base + EXYNOS_SROM_BW);  in exynos_srom_configure_bank()
100 		       srom->reg_base + EXYNOS_SROM_BC0 + bank);  in exynos_srom_configure_bank()
108 	struct exynos_srom *srom;  in exynos_srom_probe()  local
109 	struct device *dev = &pdev->dev;  in exynos_srom_probe()
112 	np = dev->of_node;  in exynos_srom_probe()
114 		dev_err(&pdev->dev, "could not find device info\n");  in exynos_srom_probe()
115 		return -EINVAL;  in exynos_srom_probe()
118 	srom = devm_kzalloc(&pdev->dev,  in exynos_srom_probe()
120 	if (!srom)  in exynos_srom_probe()
121 		return -ENOMEM;  in exynos_srom_probe()
123 	srom->dev = dev;  in exynos_srom_probe()
124 	srom->reg_base = of_iomap(np, 0);  in exynos_srom_probe()
125 	if (!srom->reg_base) {  in exynos_srom_probe()
126 		dev_err(&pdev->dev, "iomap of exynos srom controller failed\n");  in exynos_srom_probe()
127 		return -ENOMEM;  in exynos_srom_probe()
130 	platform_set_drvdata(pdev, srom);  in exynos_srom_probe()
132 	srom->reg_offset = exynos_srom_alloc_reg_dump(exynos_srom_offsets,  in exynos_srom_probe()
134 	if (!srom->reg_offset) {  in exynos_srom_probe()
135 		iounmap(srom->reg_base);  in exynos_srom_probe()
136 		return -ENOMEM;  in exynos_srom_probe()
140 		if (exynos_srom_configure_bank(srom, child)) {  in exynos_srom_probe()
163 	for (; num_regs > 0; --num_regs, ++rd)  in exynos_srom_save()
164 		rd->value = readl(base + rd->offset);  in exynos_srom_save()
171 	for (; num_regs > 0; --num_regs, ++rd)  in exynos_srom_restore()
172 		writel(rd->value, base + rd->offset);  in exynos_srom_restore()
177 	struct exynos_srom *srom = dev_get_drvdata(dev);  in exynos_srom_suspend()  local
179 	exynos_srom_save(srom->reg_base, srom->reg_offset,  in exynos_srom_suspend()
186 	struct exynos_srom *srom = dev_get_drvdata(dev);  in exynos_srom_resume()  local
188 	exynos_srom_restore(srom->reg_base, srom->reg_offset,  in exynos_srom_resume()
196 		.compatible	= "samsung,exynos4210-srom",
206 		.name = "exynos-srom",