diff mbox series

[08/15] rtc: sun6i: Expose internal oscillator through device tree

Message ID 20181128093013.24442-10-wens@csie.org (mailing list archive)
State New, archived
Headers show
Series rtc: sun6i: clock rework and pre-H6 SoC support | expand

Commit Message

Chen-Yu Tsai Nov. 28, 2018, 9:30 a.m. UTC
The bindings have been updated to expose the RTC's internal oscillator,
for some SoCs that have it directly feeding the PRCM block. The changes
include the index 2 for the clock outputs, as well as the clock output
names.

This patch adds the internal oscillator to the list of clocks exposed
through of_clk_add_hw_provider(), and also have the driver optionally
fetch the name of the clock from the device tree if it's available.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
---
 drivers/rtc/rtc-sun6i.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

Comments

Maxime Ripard Nov. 28, 2018, 10:33 a.m. UTC | #1
65;5402;1c
On Wed, Nov 28, 2018 at 05:30:06PM +0800, Chen-Yu Tsai wrote:
> The bindings have been updated to expose the RTC's internal oscillator,
> for some SoCs that have it directly feeding the PRCM block. The changes
> include the index 2 for the clock outputs, as well as the clock output
> names.
> 
> This patch adds the internal oscillator to the list of clocks exposed
> through of_clk_add_hw_provider(), and also have the driver optionally
> fetch the name of the clock from the device tree if it's available.
> 
> Signed-off-by: Chen-Yu Tsai <wens@csie.org>
> ---
>  drivers/rtc/rtc-sun6i.c | 10 +++++++---
>  1 file changed, 7 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/rtc/rtc-sun6i.c b/drivers/rtc/rtc-sun6i.c
> index 62ed9ce53d8c..273ab7fbbbe3 100644
> --- a/drivers/rtc/rtc-sun6i.c
> +++ b/drivers/rtc/rtc-sun6i.c
> @@ -220,6 +220,7 @@ static void __init sun6i_rtc_clk_init(struct device_node *node,
>  		.ops		= &sun6i_rtc_osc_ops,
>  		.name		= "losc",
>  	};
> +	const char *iosc_name = "rtc-int-osc";
>  	const char *clkout_name = "osc32k-out";
>  	const char *parents[2];
>  
> @@ -228,7 +229,7 @@ static void __init sun6i_rtc_clk_init(struct device_node *node,
>  		return;
>  
>  	rtc->data = data;
> -	clk_data = kzalloc(struct_size(clk_data, hws, 2), GFP_KERNEL);
> +	clk_data = kzalloc(struct_size(clk_data, hws, 3), GFP_KERNEL);
>  	if (!clk_data) {
>  		kfree(rtc);
>  		return;
> @@ -253,8 +254,10 @@ static void __init sun6i_rtc_clk_init(struct device_node *node,
>  	if (!of_get_property(node, "clocks", NULL))
>  		goto err;
>  
> +	of_property_read_string_index(node, "clock-output-names", 2,
> +				      &iosc_name);
>  	rtc->int_osc = clk_hw_register_fixed_rate_with_accuracy(NULL,
> -								"rtc-int-osc",
> +								iosc_name,
>  								NULL, 0,
>  								rtc->data->rc_osc_rate,
>  								300000000);
> @@ -290,9 +293,10 @@ static void __init sun6i_rtc_clk_init(struct device_node *node,
>  		return;
>  	}
>  
> -	clk_data->num = 2;
> +	clk_data->num = 3;
>  	clk_data->hws[0] = &rtc->hw;
>  	clk_data->hws[1] = __clk_get_hw(rtc->ext_losc);
> +	clk_data->hws[2] = rtc->int_osc;

Shouldn't we add a check on either the compatible on the number of
clock-output-names?

Maxime
diff mbox series

Patch

diff --git a/drivers/rtc/rtc-sun6i.c b/drivers/rtc/rtc-sun6i.c
index 62ed9ce53d8c..273ab7fbbbe3 100644
--- a/drivers/rtc/rtc-sun6i.c
+++ b/drivers/rtc/rtc-sun6i.c
@@ -220,6 +220,7 @@  static void __init sun6i_rtc_clk_init(struct device_node *node,
 		.ops		= &sun6i_rtc_osc_ops,
 		.name		= "losc",
 	};
+	const char *iosc_name = "rtc-int-osc";
 	const char *clkout_name = "osc32k-out";
 	const char *parents[2];
 
@@ -228,7 +229,7 @@  static void __init sun6i_rtc_clk_init(struct device_node *node,
 		return;
 
 	rtc->data = data;
-	clk_data = kzalloc(struct_size(clk_data, hws, 2), GFP_KERNEL);
+	clk_data = kzalloc(struct_size(clk_data, hws, 3), GFP_KERNEL);
 	if (!clk_data) {
 		kfree(rtc);
 		return;
@@ -253,8 +254,10 @@  static void __init sun6i_rtc_clk_init(struct device_node *node,
 	if (!of_get_property(node, "clocks", NULL))
 		goto err;
 
+	of_property_read_string_index(node, "clock-output-names", 2,
+				      &iosc_name);
 	rtc->int_osc = clk_hw_register_fixed_rate_with_accuracy(NULL,
-								"rtc-int-osc",
+								iosc_name,
 								NULL, 0,
 								rtc->data->rc_osc_rate,
 								300000000);
@@ -290,9 +293,10 @@  static void __init sun6i_rtc_clk_init(struct device_node *node,
 		return;
 	}
 
-	clk_data->num = 2;
+	clk_data->num = 3;
 	clk_data->hws[0] = &rtc->hw;
 	clk_data->hws[1] = __clk_get_hw(rtc->ext_losc);
+	clk_data->hws[2] = rtc->int_osc;
 	of_clk_add_hw_provider(node, of_clk_hw_onecell_get, clk_data);
 	return;