mirror of
https://github.com/torvalds/linux
synced 2024-10-05 19:02:12 +00:00
rtc: twl: add NVRAM support
Export SRAM using nvmem. Signed-off-by: Ladislav Michl <ladis@linux-mips.org> Reviewed-by: Tony Lindgren <tony@atomide.com> Link: https://lore.kernel.org/r/ZDf7qZTiml0ijD2g@lenoch Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
This commit is contained in:
parent
1e786b0370
commit
7130856f56
|
@ -487,11 +487,24 @@ static const struct rtc_class_ops twl_rtc_ops = {
|
||||||
.alarm_irq_enable = twl_rtc_alarm_irq_enable,
|
.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)
|
static int twl_rtc_probe(struct platform_device *pdev)
|
||||||
{
|
{
|
||||||
struct twl_rtc *twl_rtc;
|
struct twl_rtc *twl_rtc;
|
||||||
|
struct nvmem_config nvmem_cfg;
|
||||||
struct device_node *np = pdev->dev.of_node;
|
struct device_node *np = pdev->dev.of_node;
|
||||||
int ret = -EINVAL;
|
int ret = -EINVAL;
|
||||||
int irq = platform_get_irq(pdev, 0);
|
int irq = platform_get_irq(pdev, 0);
|
||||||
|
@ -579,6 +592,30 @@ static int twl_rtc_probe(struct platform_device *pdev)
|
||||||
return ret;
|
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;
|
return 0;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
|
Loading…
Reference in a new issue