[PATCH] reset: reset-meson: add support for the Meson-S4 SoC Reset Controller

[PATCH] reset: reset-meson: add support for the Meson-S4 SoC Reset Controller

[Zelong Dong]

Signed-off-by: Zelong Dong <zelong.dong@amlogic.com>
---
 drivers/reset/reset-meson.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/reset/reset-meson.c b/drivers/reset/reset-meson.c
index c9bc325ad65a..26dc54778615 100644
--- a/drivers/reset/reset-meson.c
+++ b/drivers/reset/reset-meson.c
@@ -98,11 +98,17 @@ static const struct meson_reset_param meson_a1_param = {
 	.level_offset	= 0x40,
 };
 
+static const struct meson_reset_param meson_s4_param = {
+	.reg_count	= 6,
+	.level_offset	= 0x40,
+};
+
 static const struct of_device_id meson_reset_dt_ids[] = {
 	 { .compatible = "amlogic,meson8b-reset",    .data = &meson8b_param},
 	 { .compatible = "amlogic,meson-gxbb-reset", .data = &meson8b_param},
 	 { .compatible = "amlogic,meson-axg-reset",  .data = &meson8b_param},
 	 { .compatible = "amlogic,meson-a1-reset",   .data = &meson_a1_param},
+	 { .compatible = "amlogic,meson-s4-reset",   .data = &meson_s4_param},
 	 { /* sentinel */ },
 };
 MODULE_DEVICE_TABLE(of, meson_reset_dt_ids);
-- 
2.34.1

Re: [PATCH] reset: reset-meson: add support for the Meson-S4 SoC Reset Controller

[Martin Blumenstingl]

Hello,

thank you for this patch!

On Mon, Dec 27, 2021 at 10:01 AM Zelong Dong <zelong.dong@amlogic.com> wrote:
>
> Signed-off-by: Zelong Dong <zelong.dong@amlogic.com>
Most maintainers don't take patches without a proper description.
./scripts/checkpatch.pl this.patch states:
WARNING: Missing commit description - Add an appropriate one

I suggest something like:
"Compared to the A1 SoCs the number of RESET registers is different
and the offset for the level registers is the same. Add a new
compatible string and struct meson_reset_param to add support for the
reset controller on the S4 SoC."

[...]
> +        { .compatible = "amlogic,meson-s4-reset",   .data = &meson_s4_param},
checkpatch reports here:
WARNING: DT compatible string "amlogic,meson-s4-reset" appears
un-documented -- check ./Documentation/devicetree/bindings/

My suggestion is to take your previous dt-bindings patch for the reset
controller and to extend it with one entry in
Documentation/devicetree/bindings/reset/amlogic,meson-reset.yaml just
like it was done for the A1 SoC: [0]
Then take both patches (dt-binding and driver) and send them as one
series, so it's clear to the reset-maintainers and reviewers that
these patches belong together.


Best regards,
Martin


[0] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=5d9730b9eb05a349c278a9f6f058ebefa9063def