tegra/fuse/fuse-tegra.c

24 #include <soc/tegra/fuse.h>
26 #include "fuse.h"
63 static struct tegra_fuse *fuse = &(struct tegra_fuse) {
103 	struct tegra_fuse *fuse = priv;
107 		buffer[i] = fuse->read(fuse, offset + i * 4);
114 	fuse->base = (void __iomem *)base;
115 	fuse->clk = NULL;
128 static int tegra_fuse_add_lookups(struct tegra_fuse *fuse)
130 	fuse->lookups = kmemdup_array(fuse->soc->lookups, sizeof(*fuse->lookups),
131 				      fuse->soc->num_lookups, GFP_KERNEL);
132 	if (!fuse->lookups)
135 	nvmem_add_cell_lookups(fuse->lookups, fuse->soc->num_lookups);
142 	void __iomem *base = fuse->base;
152 	fuse->base = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
153 	if (IS_ERR(fuse->base))
154 		return PTR_ERR(fuse->base);
155 	fuse->phys = res->start;
158 	if (is_acpi_node(dev_fwnode(&pdev->dev)) && !fuse->soc) {
167 			fuse->soc = &tegra194_fuse_soc;
172 			fuse->soc = &tegra234_fuse_soc;
177 			fuse->soc = &tegra241_fuse_soc;
184 		fuse->soc->init(fuse);
188 		err = tegra_fuse_add_lookups(fuse);
193 	fuse->clk = devm_clk_get_optional(&pdev->dev, "fuse");
194 	if (IS_ERR(fuse->clk))
195 		return dev_err_probe(&pdev->dev, PTR_ERR(fuse->clk), "failed to get FUSE clock\n");
197 	platform_set_drvdata(pdev, fuse);
198 	fuse->dev = &pdev->dev;
204 	if (fuse->soc->probe) {
205 		err = fuse->soc->probe(fuse);
212 	nvmem.name = "fuse";
215 	nvmem.cells = fuse->soc->cells;
216 	nvmem.ncells = fuse->soc->num_cells;
217 	nvmem.keepout = fuse->soc->keepouts;
218 	nvmem.nkeepout = fuse->soc->num_keepouts;
223 	nvmem.size = fuse->soc->info->size;
226 	nvmem.priv = fuse;
228 	fuse->nvmem = devm_nvmem_register(&pdev->dev, &nvmem);
229 	if (IS_ERR(fuse->nvmem)) {
230 		err = PTR_ERR(fuse->nvmem);
236 	fuse->rst = devm_reset_control_get_optional(&pdev->dev, "fuse");
237 	if (IS_ERR(fuse->rst))
238 		return dev_err_probe(&pdev->dev, PTR_ERR(fuse->rst), "failed to get FUSE reset\n");
248 	err = reset_control_reset(fuse->rst);
266 	err = clk_prepare_enable(fuse->clk);
277 	clk_disable_unprepare(fuse->clk);
290 	if (fuse->soc->clk_suspend_on)
302 	if (fuse->soc->clk_suspend_on)
324 		.name = "tegra-fuse",
336 	unsigned int offset = fuse->soc->info->spare + spare * 4;
338 	return fuse->read_early(fuse, offset) & 1;
343 	return fuse->read_early(fuse, offset);
348 	if (!fuse->dev)
352 	 * Wait for fuse->clk to be initialized if device-tree boot is used.
354 	if (is_of_node(dev_fwnode(fuse->dev)) && !fuse->clk)
357 	if (!fuse->read)
360 	if (IS_ERR(fuse->clk))
361 		return PTR_ERR(fuse->clk);
363 	*value = fuse->read(fuse, offset);
459 	attr->custom_attr_group = fuse->soc->soc_attr_group;
502 				fuse->soc = &tegra20_fuse_soc;
508 				fuse->soc = &tegra30_fuse_soc;
514 				fuse->soc = &tegra114_fuse_soc;
520 				fuse->soc = &tegra124_fuse_soc;
545 		fuse->soc = match->data;
561 	fuse->base = ioremap(regs.start, resource_size(&regs));
562 	if (!fuse->base) {
567 	fuse->soc->init(fuse);
571 	err = tegra_fuse_add_lookups(fuse);