[RFC PATCH 07/12] rtc: sun6i: add compatible string for V831/V833 RTC

[Icenowy Zheng]

These chips share the same die, and the RTC block is similar to H6
one, but with functionality of dividing 24M clock to get 32k (useful for
32k clock output).

Add compatible string for it. The special clock divider is TODO.

Cc: Alessandro Zummo <a.zummo at towertech.it>
Cc: Alexandre Belloni <alexandre.belloni at bootlin.com>
Cc: linux-rtc at vger.kernel.org
Signed-off-by: Icenowy Zheng <icenowy at aosc.io>
---
 drivers/rtc/rtc-sun6i.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/drivers/rtc/rtc-sun6i.c b/drivers/rtc/rtc-sun6i.c
index e2b8b150bcb4..c9a1f2319f92 100644
--- a/drivers/rtc/rtc-sun6i.c
+++ b/drivers/rtc/rtc-sun6i.c
@@ -378,6 +378,23 @@ static void __init sun50i_h6_rtc_clk_init(struct device_node *node)
 CLK_OF_DECLARE_DRIVER(sun50i_h6_rtc_clk, "allwinner,sun50i-h6-rtc",
 		      sun50i_h6_rtc_clk_init);
 
+static const struct sun6i_rtc_clk_data sun8i_v831_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 sun8i_v831_rtc_clk_init(struct device_node *node)
+{
+	sun6i_rtc_clk_init(node, &sun8i_v831_rtc_data);
+}
+CLK_OF_DECLARE_DRIVER(sun8i_v831_rtc_clk, "allwinner,sun8i-v831-rtc",
+		      sun8i_v831_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
@@ -745,6 +762,7 @@ static const struct of_device_id sun6i_rtc_dt_ids[] = {
 	{ .compatible = "allwinner,sun8i-h3-rtc" },
 	{ .compatible = "allwinner,sun8i-r40-rtc" },
 	{ .compatible = "allwinner,sun8i-v3-rtc" },
+	{ .compatible = "allwinner,sun8i-v831-rtc" },
 	{ .compatible = "allwinner,sun50i-h5-rtc" },
 	{ .compatible = "allwinner,sun50i-h6-rtc" },
 	{ /* sentinel */ },
-- 
2.28.0