diff options
| author | Mathew McBride | 2021-09-17 06:46:02 +0000 |
|---|---|---|
| committer | Tom Rini | 2021-10-03 14:40:56 -0400 |
| commit | 9ca4ae2d2a7300e9d2bfdd0b818aacc854c7c617 (patch) | |
| tree | f34591d6602970dfe709c4584f987c463aac9436 | |
| parent | 152ef916f8f3a8b650aa7ab1ea5b4e9555011536 (diff) | |
rtc: rx8025: add support for EPSON RX8035.
The RX8035 is a newer model from EPSON which is
very similar in operation to the RX8025.
The changes mirror similar ones that will be
in Linux 5.15:
https://lore.kernel.org/all/20210709044518.28769-2-matt@traverse.com.au/
The UBOOT_DRIVER ID has also been corrected, previously
it declared itself as rx8010sj_rtc which is a different driver.
Signed-off-by: Mathew McBride <matt@traverse.com.au>
| -rw-r--r-- | drivers/rtc/rx8025.c | 33 |
1 files changed, 28 insertions, 5 deletions
diff --git a/drivers/rtc/rx8025.c b/drivers/rtc/rx8025.c index 36e5b0122cf..09bf365f635 100644 --- a/drivers/rtc/rx8025.c +++ b/drivers/rtc/rx8025.c @@ -24,6 +24,11 @@ #endif /*---------------------------------------------------------------------*/ +enum rx_model { + model_rx_8025, + model_rx_8035, +}; + /* * RTC register addresses */ @@ -64,6 +69,20 @@ static int rtc_write(struct udevice *dev, uchar reg, uchar val); +static int rx8025_is_osc_stopped(enum rx_model model, int ctrl2) +{ + int xstp = ctrl2 & RTC_CTL2_BIT_XST; + /* XSTP bit has different polarity on RX-8025 vs RX-8035. + * RX-8025: 0 == oscillator stopped + * RX-8035: 1 == oscillator stopped + */ + + if (model == model_rx_8025) + xstp = !xstp; + + return xstp; +} + /* * Get the current time from the RTC */ @@ -101,8 +120,7 @@ static int rx8025_rtc_get(struct udevice *dev, struct rtc_time *tmp) printf("RTC: voltage drop detected\n"); rel = -1; } - - if (!(ctl2 & RTC_CTL2_BIT_XST)) { + if (rx8025_is_osc_stopped(dev->driver_data, ctl2)) { printf("RTC: oscillator stop detected\n"); rel = -1; } @@ -180,7 +198,11 @@ static int rx8025_rtc_reset(struct udevice *dev) ctl2 = rtc_read(RTC_CTL2_REG_ADDR); ctl2 &= ~(RTC_CTL2_BIT_PON | RTC_CTL2_BIT_VDET); - ctl2 |= RTC_CTL2_BIT_XST | RTC_CTL2_BIT_VDSL; + + if (dev->driver_data == model_rx_8035) + ctl2 &= ~(RTC_CTL2_BIT_XST); + else + ctl2 |= RTC_CTL2_BIT_XST; return rtc_write(dev, RTC_CTL2_REG_ADDR, ctl2); } @@ -223,11 +245,12 @@ static const struct rtc_ops rx8025_rtc_ops = { }; static const struct udevice_id rx8025_rtc_ids[] = { - { .compatible = "epson,rx8025" }, + { .compatible = "epson,rx8025", .data = model_rx_8025 }, + { .compatible = "epson,rx8035", .data = model_rx_8035 }, { } }; -U_BOOT_DRIVER(rx8010sj_rtc) = { +U_BOOT_DRIVER(rx8025_rtc) = { .name = "rx8025_rtc", .id = UCLASS_RTC, .probe = rx8025_probe, |