diff options
Diffstat (limited to 'drivers/rtc/rtc-sun6i.c')
| -rw-r--r-- | drivers/rtc/rtc-sun6i.c | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/drivers/rtc/rtc-sun6i.c b/drivers/rtc/rtc-sun6i.c index 5b3e4da63406..57540727ce1c 100644 --- a/drivers/rtc/rtc-sun6i.c +++ b/drivers/rtc/rtc-sun6i.c @@ -71,6 +71,10 @@ #define SUN6I_LOSC_OUT_GATING 0x0060 #define SUN6I_LOSC_OUT_GATING_EN_OFFSET 0 +/* General-purpose data */ +#define SUN6I_GP_DATA 0x0100 +#define SUN6I_GP_DATA_SIZE 0x20 + /* * Get date values */ @@ -370,6 +374,23 @@ CLK_OF_DECLARE_DRIVER(sun8i_h3_rtc_clk, "allwinner,sun8i-h3-rtc", CLK_OF_DECLARE_DRIVER(sun50i_h5_rtc_clk, "allwinner,sun50i-h5-rtc", sun8i_h3_rtc_clk_init); +static const struct sun6i_rtc_clk_data sun50i_h6_rtc_data = { + .rc_osc_rate = 16000000, + .fixed_prescaler = 32, + .has_prescaler = 1, + .has_out_clk = 1, + .export_iosc = 1, + .has_losc_en = 1, + .has_auto_swt = 1, +}; + +static void __init sun50i_h6_rtc_clk_init(struct device_node *node) +{ + sun6i_rtc_clk_init(node, &sun50i_h6_rtc_data); +} +CLK_OF_DECLARE_DRIVER(sun50i_h6_rtc_clk, "allwinner,sun50i-h6-rtc", + sun50i_h6_rtc_clk_init); + /* * The R40 user manual is self-conflicting on whether the prescaler is * fixed or configurable. The clock diagram shows it as fixed, but there @@ -662,6 +683,39 @@ static const struct rtc_class_ops sun6i_rtc_ops = { .alarm_irq_enable = sun6i_rtc_alarm_irq_enable }; +static int sun6i_rtc_nvmem_read(void *priv, unsigned int offset, void *_val, size_t bytes) +{ + struct sun6i_rtc_dev *chip = priv; + u32 *val = _val; + int i; + + for (i = 0; i < bytes / 4; ++i) + val[i] = readl(chip->base + SUN6I_GP_DATA + offset + 4 * i); + + return 0; +} + +static int sun6i_rtc_nvmem_write(void *priv, unsigned int offset, void *_val, size_t bytes) +{ + struct sun6i_rtc_dev *chip = priv; + u32 *val = _val; + int i; + + for (i = 0; i < bytes / 4; ++i) + writel(val[i], chip->base + SUN6I_GP_DATA + offset + 4 * i); + + return 0; +} + +static struct nvmem_config sun6i_rtc_nvmem_cfg = { + .type = NVMEM_TYPE_BATTERY_BACKED, + .reg_read = sun6i_rtc_nvmem_read, + .reg_write = sun6i_rtc_nvmem_write, + .size = SUN6I_GP_DATA_SIZE, + .word_size = 4, + .stride = 4, +}; + #ifdef CONFIG_PM_SLEEP /* Enable IRQ wake on suspend, to wake up from RTC. */ static int sun6i_rtc_suspend(struct device *dev) @@ -795,6 +849,11 @@ static int sun6i_rtc_probe(struct platform_device *pdev) if (ret) return ret; + sun6i_rtc_nvmem_cfg.priv = chip; + ret = devm_rtc_nvmem_register(chip->rtc, &sun6i_rtc_nvmem_cfg); + if (ret) + return ret; + dev_info(&pdev->dev, "RTC enabled\n"); return 0; |