diff options
Diffstat (limited to 'drivers/rtc/rtc-twl.c')
| -rw-r--r-- | drivers/rtc/rtc-twl.c | 43 |
1 files changed, 38 insertions, 5 deletions
diff --git a/drivers/rtc/rtc-twl.c b/drivers/rtc/rtc-twl.c index 81b36948c2fa..13f8ce08243c 100644 --- a/drivers/rtc/rtc-twl.c +++ b/drivers/rtc/rtc-twl.c @@ -487,11 +487,24 @@ static const struct rtc_class_ops twl_rtc_ops = { .alarm_irq_enable = twl_rtc_alarm_irq_enable, }; +static int twl_nvram_read(void *priv, unsigned int offset, void *val, + size_t bytes) +{ + return twl_i2c_read((long)priv, val, offset, bytes); +} + +static int twl_nvram_write(void *priv, unsigned int offset, void *val, + size_t bytes) +{ + return twl_i2c_write((long)priv, val, offset, bytes); +} + /*----------------------------------------------------------------------*/ static int twl_rtc_probe(struct platform_device *pdev) { struct twl_rtc *twl_rtc; + struct nvmem_config nvmem_cfg; struct device_node *np = pdev->dev.of_node; int ret = -EINVAL; int irq = platform_get_irq(pdev, 0); @@ -542,7 +555,6 @@ static int twl_rtc_probe(struct platform_device *pdev) REG_INT_MSK_STS_A); } - dev_info(&pdev->dev, "Enabling TWL-RTC\n"); ret = twl_rtc_write_u8(twl_rtc, BIT_RTC_CTRL_REG_STOP_RTC_M, REG_RTC_CTRL_REG); if (ret < 0) @@ -564,11 +576,8 @@ static int twl_rtc_probe(struct platform_device *pdev) twl_rtc->rtc = devm_rtc_device_register(&pdev->dev, pdev->name, &twl_rtc_ops, THIS_MODULE); - if (IS_ERR(twl_rtc->rtc)) { - dev_err(&pdev->dev, "can't register RTC device, err %ld\n", - PTR_ERR(twl_rtc->rtc)); + if (IS_ERR(twl_rtc->rtc)) return PTR_ERR(twl_rtc->rtc); - } ret = devm_request_threaded_irq(&pdev->dev, irq, NULL, twl_rtc_interrupt, @@ -579,6 +588,30 @@ static int twl_rtc_probe(struct platform_device *pdev) return ret; } + memset(&nvmem_cfg, 0, sizeof(nvmem_cfg)); + nvmem_cfg.name = "twl-secured-"; + nvmem_cfg.type = NVMEM_TYPE_BATTERY_BACKED; + nvmem_cfg.reg_read = twl_nvram_read, + nvmem_cfg.reg_write = twl_nvram_write, + nvmem_cfg.word_size = 1; + nvmem_cfg.stride = 1; + if (twl_class_is_4030()) { + /* 20 bytes SECURED_REG area */ + nvmem_cfg.size = 20; + nvmem_cfg.priv = (void *)TWL_MODULE_SECURED_REG; + devm_rtc_nvmem_register(twl_rtc->rtc, &nvmem_cfg); + /* 8 bytes BACKUP area */ + nvmem_cfg.name = "twl-backup-"; + nvmem_cfg.size = 8; + nvmem_cfg.priv = (void *)TWL4030_MODULE_BACKUP; + devm_rtc_nvmem_register(twl_rtc->rtc, &nvmem_cfg); + } else { + /* 8 bytes SECURED_REG area */ + nvmem_cfg.size = 8; + nvmem_cfg.priv = (void *)TWL_MODULE_SECURED_REG; + devm_rtc_nvmem_register(twl_rtc->rtc, &nvmem_cfg); + } + return 0; } |