7b0c873f4d
* sunxi-5.18: add megous patches: tag: orange-pi-5.18-20220627-1924 * tools: mk_format_patch: ignore-matching-lines git version * sunxi-5.18: re-extracted armbian patches after being applied to 5.18.8 * sunxi-5.18: switch to version tag=v5.18.8
69 lines
2.5 KiB
Diff
69 lines
2.5 KiB
Diff
From 001b1d4a63b0f694e1084f94012e4cc918699ad8 Mon Sep 17 00:00:00 2001
|
|
From: Andre Przywara <andre.przywara@arm.com>
|
|
Date: Mon, 14 Jun 2021 23:02:45 +0100
|
|
Subject: [PATCH 011/169] drv:rtc:sun6i: support RTCs without external LOSCs
|
|
|
|
Some newer Allwinner RTCs (for instance the one in the H616 SoC) lack
|
|
a pin for an external 32768 Hz oscillator. As a consequence, this LOSC
|
|
can't be selected as the RTC clock source, and we must rely on the
|
|
internal RC oscillator.
|
|
To allow additions of clocks to the RTC node, add a feature bit to ignore
|
|
any provided clocks for now (the current code would think this is the
|
|
external LOSC). Later DTs and code can then for instance add the PLL
|
|
based clock input, and older kernel won't get confused.
|
|
|
|
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
|
|
Acked-by: Jernej Skrabec <jernej.skrabec@gmail.com>
|
|
---
|
|
drivers/rtc/rtc-sun6i.c | 16 +++++++++++-----
|
|
1 file changed, 11 insertions(+), 5 deletions(-)
|
|
|
|
diff --git a/drivers/rtc/rtc-sun6i.c b/drivers/rtc/rtc-sun6i.c
|
|
index 0ba7420a3..be6057a2e 100644
|
|
--- a/drivers/rtc/rtc-sun6i.c
|
|
+++ b/drivers/rtc/rtc-sun6i.c
|
|
@@ -139,6 +139,7 @@ struct sun6i_rtc_clk_data {
|
|
unsigned int export_iosc : 1;
|
|
unsigned int has_losc_en : 1;
|
|
unsigned int has_auto_swt : 1;
|
|
+ unsigned int no_ext_losc : 1;
|
|
};
|
|
|
|
#define RTC_LINEAR_DAY BIT(0)
|
|
@@ -261,7 +262,7 @@ static void __init sun6i_rtc_clk_init(struct device_node *node,
|
|
}
|
|
|
|
/* Switch to the external, more precise, oscillator, if present */
|
|
- if (of_get_property(node, "clocks", NULL)) {
|
|
+ if (!rtc->data->no_ext_losc && of_get_property(node, "clocks", NULL)) {
|
|
reg |= SUN6I_LOSC_CTRL_EXT_OSC;
|
|
if (rtc->data->has_losc_en)
|
|
reg |= SUN6I_LOSC_CTRL_EXT_LOSC_EN;
|
|
@@ -287,14 +288,19 @@ static void __init sun6i_rtc_clk_init(struct device_node *node,
|
|
}
|
|
|
|
parents[0] = clk_hw_get_name(rtc->int_osc);
|
|
- /* If there is no external oscillator, this will be NULL and ... */
|
|
- parents[1] = of_clk_get_parent_name(node, 0);
|
|
+ if (rtc->data->no_ext_losc) {
|
|
+ parents[1] = NULL;
|
|
+ init.num_parents = 1;
|
|
+ } else {
|
|
+ /* If there is no external oscillator, this will be NULL and */
|
|
+ parents[1] = of_clk_get_parent_name(node, 0);
|
|
+ /* ... number of clock parents will be 1. */
|
|
+ init.num_parents = of_clk_get_parent_count(node) + 1;
|
|
+ }
|
|
|
|
rtc->hw.init = &init;
|
|
|
|
init.parent_names = parents;
|
|
- /* ... number of clock parents will be 1. */
|
|
- init.num_parents = of_clk_get_parent_count(node) + 1;
|
|
of_property_read_string_index(node, "clock-output-names", 0,
|
|
&init.name);
|
|
|
|
--
|
|
2.35.3
|
|
|