Lines Matching defs:efuse
80 * efuse controller, so we need one hardware spinlock to synchronize between
83 static int sc27xx_efuse_lock(struct sc27xx_efuse *efuse)
87 mutex_lock(&efuse->mutex);
89 ret = hwspin_lock_timeout_raw(efuse->hwlock,
92 dev_err(efuse->dev, "timeout to get the hwspinlock\n");
93 mutex_unlock(&efuse->mutex);
100 static void sc27xx_efuse_unlock(struct sc27xx_efuse *efuse)
102 hwspin_unlock_raw(efuse->hwlock);
103 mutex_unlock(&efuse->mutex);
106 static int sc27xx_efuse_poll_status(struct sc27xx_efuse *efuse, u32 bits)
111 ret = regmap_read_poll_timeout(efuse->regmap,
112 efuse->base + SC27XX_EFUSE_STATUS,
117 dev_err(efuse->dev, "timeout to update the efuse status\n");
126 struct sc27xx_efuse *efuse = context;
135 ret = sc27xx_efuse_lock(efuse);
139 /* Enable the efuse controller. */
140 ret = regmap_update_bits(efuse->regmap, efuse->var_data->module_en,
146 * Before reading, we should ensure the efuse controller is in
149 ret = sc27xx_efuse_poll_status(efuse, SC27XX_EFUSE_STANDBY);
154 ret = regmap_write(efuse->regmap,
155 efuse->base + SC27XX_EFUSE_BLOCK_INDEX,
160 /* Start reading process from efuse memory. */
161 ret = regmap_update_bits(efuse->regmap,
162 efuse->base + SC27XX_EFUSE_MODE_CTRL,
172 ret = sc27xx_efuse_poll_status(efuse, SC27XX_EFUSE_RD_DONE);
176 /* Read data from efuse memory. */
177 ret = regmap_read(efuse->regmap, efuse->base + SC27XX_EFUSE_DATA_RD,
183 ret = regmap_update_bits(efuse->regmap,
184 efuse->base + SC27XX_EFUSE_MODE_CTRL,
189 /* Disable the efuse controller after reading. */
190 regmap_update_bits(efuse->regmap, efuse->var_data->module_en, SC27XX_EFUSE_EN, 0);
192 sc27xx_efuse_unlock(efuse);
207 struct sc27xx_efuse *efuse;
210 efuse = devm_kzalloc(&pdev->dev, sizeof(*efuse), GFP_KERNEL);
211 if (!efuse)
214 efuse->regmap = dev_get_regmap(pdev->dev.parent, NULL);
215 if (!efuse->regmap) {
216 dev_err(&pdev->dev, "failed to get efuse regmap\n");
220 ret = of_property_read_u32(np, "reg", &efuse->base);
222 dev_err(&pdev->dev, "failed to get efuse base address\n");
232 efuse->hwlock = devm_hwspin_lock_request_specific(&pdev->dev, ret);
233 if (!efuse->hwlock) {
238 mutex_init(&efuse->mutex);
239 efuse->dev = &pdev->dev;
240 efuse->var_data = of_device_get_match_data(&pdev->dev);
245 econfig.name = "sc27xx-efuse";
248 econfig.priv = efuse;
260 { .compatible = "sprd,sc2731-efuse", .data = &sc2731_edata},
261 { .compatible = "sprd,sc2730-efuse", .data = &sc2730_edata},
268 .name = "sc27xx-efuse",
276 MODULE_DESCRIPTION("Spreadtrum SC27xx efuse driver");