From: Wei Fu <wefu@xxxxxxxxxx>
This patch add Counter Prescaler support in APM X-Gene RTC driver by
getting prescaler (Optional) property value from dtb.
This hardware support can only be found in DW_apb_rtc after v2.06a.
And adds the optional property "prescaler" in bindings for APM X-Gene RTC.
Because the clock source on some platform to RTC is NOT 1HZ,
so we need to prescale the clock to make the input clock become 1HZ,
like (32K/prescaler) = 1HZ on the XuanTie TH1520 AP sub-system RTC.
This patch also add "snps,dw-apb-rtc" into the "compatible".
Since XuanTie TH1520 is using the same RTC, so this patch enables
APM X-Gene RTC driver for XuanTie TH1520, and add a device node in
the XuanTie TH1520 Soc dts: th1520.dtsi.
Wei Fu (5):
drivers/rtc/rtc-xgene: Add prescaler support in APM X-Gene RTC driver
dt-bindings: rtc: Add optional property "prescaler" in APM X-Gene RTC
Document
drivers/rtc/rtc-xgene: Add "snps,dw-apb-rtc" into the "compatible"
Kconfig: Enable APM X-Gene RTC for XuanTie TH1520
riscv: dts: thead: Add XuanTie TH1520 RTC device node
.../devicetree/bindings/rtc/xgene-rtc.txt | 16 ++++++++++
arch/riscv/boot/dts/thead/th1520.dtsi | 11 +++++++
drivers/rtc/Kconfig | 12 ++++++-
drivers/rtc/rtc-xgene.c | 32 +++++++++++++++++++
4 files changed, 70 insertions(+), 1 deletion(-)
--
2.44.0
