diff options
| author | Alexandre Belloni <alexandre.belloni@bootlin.com> | 2019-12-14 23:10:22 +0100 |
|---|---|---|
| committer | Alexandre Belloni <alexandre.belloni@bootlin.com> | 2019-12-23 11:13:49 +0100 |
| commit | ec923fcccf9b7d123f36f181b9088e1501b5a211 (patch) | |
| tree | 8af35ff308b4ab90f778a5a38b87911061a3ab9b /drivers/rtc | |
| parent | cbc943eb37ca1ce2c1c05de54d9768bb7824a7aa (diff) | |
rtc: rv3029: add nvram support
Export the 8 byte RAM using nvmem.
Link: https://lore.kernel.org/r/20191214221022.622482-17-alexandre.belloni@bootlin.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Diffstat (limited to 'drivers/rtc')
| -rw-r--r-- | drivers/rtc/rtc-rv3029c2.c | 36 |
1 files changed, 31 insertions, 5 deletions
diff --git a/drivers/rtc/rtc-rv3029c2.c b/drivers/rtc/rtc-rv3029c2.c index 9c3a00a3e41b..fe74fa91ee8c 100644 --- a/drivers/rtc/rtc-rv3029c2.c +++ b/drivers/rtc/rtc-rv3029c2.c @@ -109,10 +109,8 @@ #define RV3029_CONTROL_E2P_TOV_MASK 0x3F /* XTAL turnover temp mask */ /* user ram section */ -#define RV3029_USR1_RAM_PAGE 0x38 -#define RV3029_USR1_SECTION_LEN 0x04 -#define RV3029_USR2_RAM_PAGE 0x3C -#define RV3029_USR2_SECTION_LEN 0x04 +#define RV3029_RAM_PAGE 0x38 +#define RV3029_RAM_SECTION_LEN 8 struct rv3029_data { struct device *dev; @@ -481,6 +479,18 @@ static int rv3029_ioctl(struct device *dev, unsigned int cmd, unsigned long arg) } } +static int rv3029_nvram_write(void *priv, unsigned int offset, void *val, + size_t bytes) +{ + return regmap_bulk_write(priv, RV3029_RAM_PAGE + offset, val, bytes); +} + +static int rv3029_nvram_read(void *priv, unsigned int offset, void *val, + size_t bytes) +{ + return regmap_bulk_read(priv, RV3029_RAM_PAGE + offset, val, bytes); +} + static const struct rv3029_trickle_tab_elem { u32 r; /* resistance in ohms */ u8 conf; /* trickle config bits */ @@ -701,6 +711,15 @@ static int rv3029_probe(struct device *dev, struct regmap *regmap, int irq, const char *name) { struct rv3029_data *rv3029; + struct nvmem_config nvmem_cfg = { + .name = "rv3029_nvram", + .word_size = 1, + .stride = 1, + .size = RV3029_RAM_SECTION_LEN, + .type = NVMEM_TYPE_BATTERY_BACKED, + .reg_read = rv3029_nvram_read, + .reg_write = rv3029_nvram_write, + }; int rc = 0; rv3029 = devm_kzalloc(dev, sizeof(*rv3029), GFP_KERNEL); @@ -738,7 +757,14 @@ static int rv3029_probe(struct device *dev, struct regmap *regmap, int irq, rv3029->rtc->range_min = RTC_TIMESTAMP_BEGIN_2000; rv3029->rtc->range_max = RTC_TIMESTAMP_END_2079; - return rtc_register_device(rv3029->rtc); + rc = rtc_register_device(rv3029->rtc); + if (rc) + return rc; + + nvmem_cfg.priv = rv3029->regmap; + rtc_nvmem_register(rv3029->rtc, &nvmem_cfg); + + return 0; } static const struct regmap_range rv3029_holes_range[] = { |