Lines Matching defs:efuse
81 * efuse controller, so we need one hardware spinlock to synchronize between
84 static int sc27xx_efuse_lock(struct sc27xx_efuse *efuse)
88 mutex_lock(&efuse->mutex);
90 ret = hwspin_lock_timeout_raw(efuse->hwlock,
93 dev_err(efuse->dev, "timeout to get the hwspinlock\n");
94 mutex_unlock(&efuse->mutex);
101 static void sc27xx_efuse_unlock(struct sc27xx_efuse *efuse)
103 hwspin_unlock_raw(efuse->hwlock);
104 mutex_unlock(&efuse->mutex);
107 static int sc27xx_efuse_poll_status(struct sc27xx_efuse *efuse, u32 bits)
112 ret = regmap_read_poll_timeout(efuse->regmap,
113 efuse->base + SC27XX_EFUSE_STATUS,
118 dev_err(efuse->dev, "timeout to update the efuse status\n");
127 struct sc27xx_efuse *efuse = context;
136 ret = sc27xx_efuse_lock(efuse);
140 /* Enable the efuse controller. */
141 ret = regmap_update_bits(efuse->regmap, efuse->var_data->module_en,
147 * Before reading, we should ensure the efuse controller is in
150 ret = sc27xx_efuse_poll_status(efuse, SC27XX_EFUSE_STANDBY);
155 ret = regmap_write(efuse->regmap,
156 efuse->base + SC27XX_EFUSE_BLOCK_INDEX,
161 /* Start reading process from efuse memory. */
162 ret = regmap_update_bits(efuse->regmap,
163 efuse->base + SC27XX_EFUSE_MODE_CTRL,
173 ret = sc27xx_efuse_poll_status(efuse, SC27XX_EFUSE_RD_DONE);
177 /* Read data from efuse memory. */
178 ret = regmap_read(efuse->regmap, efuse->base + SC27XX_EFUSE_DATA_RD,
184 ret = regmap_update_bits(efuse->regmap,
185 efuse->base + SC27XX_EFUSE_MODE_CTRL,
190 /* Disable the efuse controller after reading. */
191 regmap_update_bits(efuse->regmap, efuse->var_data->module_en, SC27XX_EFUSE_EN, 0);
193 sc27xx_efuse_unlock(efuse);
208 struct sc27xx_efuse *efuse;
211 efuse = devm_kzalloc(&pdev->dev, sizeof(*efuse), GFP_KERNEL);
212 if (!efuse)
215 efuse->regmap = dev_get_regmap(pdev->dev.parent, NULL);
216 if (!efuse->regmap) {
217 dev_err(&pdev->dev, "failed to get efuse regmap\n");
221 ret = of_property_read_u32(np, "reg", &efuse->base);
223 dev_err(&pdev->dev, "failed to get efuse base address\n");
233 efuse->hwlock = devm_hwspin_lock_request_specific(&pdev->dev, ret);
234 if (!efuse->hwlock) {
239 mutex_init(&efuse->mutex);
240 efuse->dev = &pdev->dev;
241 efuse->var_data = of_device_get_match_data(&pdev->dev);
246 econfig.name = "sc27xx-efuse";
249 econfig.priv = efuse;
261 { .compatible = "sprd,sc2731-efuse", .data = &sc2731_edata},
262 { .compatible = "sprd,sc2730-efuse", .data = &sc2730_edata},
269 .name = "sc27xx-efuse",
277 MODULE_DESCRIPTION("Spreadtrum SC27xx efuse driver");