[PATCH 0/2] regulator: fan53555: Add support for Silergy SYM827

[PATCH 0/2] regulator: fan53555: Add support for Silergy SYM827

[Ben Grisdale via B4 Relay]

The Silergy SYM827 is a 6A synchronous step-down converter with a
similar I2C register map to the FAN53555, found in MediaTek MT8163
devices as the external VPROC regulator. It differs from the already
supported SYR827 in its die ID and output voltage range.

Signed-off-by: Ben Grisdale <bengris32@protonmail.ch>
---
Ben Grisdale (2):
      regulator: dt-bindings: fan53555: Add Silergy SYM827
      regulator: fan53555: Add support for Silergy SYM827

 Documentation/devicetree/bindings/regulator/fcs,fan53555.yaml |  1 +
 drivers/regulator/fan53555.c                                  | 11 +++++++++++
 2 files changed, 12 insertions(+)
---
base-commit: ddfe51b0a0f5dc9e415cc2c8ad8db17532dd426b
change-id: 20261105-fan53555-silergy-sym827-support-df98d756d3bb

Best regards,
--  
Ben Grisdale <bengris32@protonmail.ch>

[PATCH 1/2] regulator: dt-bindings: fan53555: Add Silergy SYM827

[Ben Grisdale via B4 Relay]

From: Ben Grisdale <bengris32@protonmail.ch>

Add a compatible string for the Silergy SYM827, a 6A synchronous
step-down converter with a similar I2C register map to the FAN53555.

Signed-off-by: Ben Grisdale <bengris32@protonmail.ch>
---
 Documentation/devicetree/bindings/regulator/fcs,fan53555.yaml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Documentation/devicetree/bindings/regulator/fcs,fan53555.yaml b/Documentation/devicetree/bindings/regulator/fcs,fan53555.yaml
index b35b8f365b0f..1bc22eb43dd9 100644
--- a/Documentation/devicetree/bindings/regulator/fcs,fan53555.yaml
+++ b/Documentation/devicetree/bindings/regulator/fcs,fan53555.yaml
@@ -20,6 +20,7 @@ properties:
           - fcs,fan53526
           - rockchip,rk8600
           - rockchip,rk8602
+          - silergy,sym827
           - silergy,syr827
           - silergy,syr828
           - tcs,tcs4525

-- 
2.56.0

Re: [PATCH 1/2] regulator: dt-bindings: fan53555: Add Silergy SYM827

[Conor Dooley]

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Acked-by: Conor Dooley <conor.dooley@microchip.com>
pw-bot: not-applicable

[-- Attachment #2: signature.asc --]
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[PATCH 2/2] regulator: fan53555: Add support for Silergy SYM827

[Ben Grisdale via B4 Relay]

From: Ben Grisdale <bengris32@protonmail.ch>

The Silergy SYM827 is a 6A synchronous step-down converter with a
similar I2C register map to the FAN53555.

SYM827 reports die ID 1. Its output starts at 600mV and increments in
12.5mV steps. No datasheet is available for this hardware, so the die ID
was read from devices, and the voltage range was taken from the
downstream driver [1].

Link: https://github.com/amazon-oss/android_kernel_amazon_mt8163/blob/7c8251b354f11a4703e6f7d5ad7b0c545bbed15d/drivers/regulator/sym827-regulator.c#L60-L62 [1]
Signed-off-by: Ben Grisdale <bengris32@protonmail.ch>
---
 drivers/regulator/fan53555.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/drivers/regulator/fan53555.c b/drivers/regulator/fan53555.c
index 6557d8cbe98d..9ac3a4e6832e 100644
--- a/drivers/regulator/fan53555.c
+++ b/drivers/regulator/fan53555.c
@@ -118,6 +118,7 @@ enum {
 };
 
 enum {
+	SILERGY_SYM827 = 1,
 	SILERGY_SYR82X = 8,
 	SILERGY_SYR83X = 9,
 };
@@ -412,6 +413,10 @@ static int fan53555_voltages_setup_silergy(struct fan53555_device_info *di)
 {
 	/* Init voltage range and step */
 	switch (di->chip_id) {
+	case SILERGY_SYM827:
+		di->vsel_min = 600000;
+		di->vsel_step = 12500;
+		break;
 	case SILERGY_SYR82X:
 	case SILERGY_SYR83X:
 		di->vsel_min = 712500;
@@ -684,6 +689,9 @@ static const struct of_device_id __maybe_unused fan53555_dt_ids[] = {
 	}, {
 		.compatible = "rockchip,rk8602",
 		.data = (void *)RK8602_VENDOR_ROCKCHIP
+	}, {
+		.compatible = "silergy,sym827",
+		.data = (void *)FAN53555_VENDOR_SILERGY,
 	}, {
 		.compatible = "silergy,syr827",
 		.data = (void *)FAN53555_VENDOR_SILERGY,
@@ -794,6 +802,9 @@ static const struct i2c_device_id fan53555_id[] = {
 	}, {
 		.name = "rk8602",
 		.driver_data = RK8602_VENDOR_ROCKCHIP
+	}, {
+		.name = "sym827",
+		.driver_data = FAN53555_VENDOR_SILERGY
 	}, {
 		.name = "syr827",
 		.driver_data = FAN53555_VENDOR_SILERGY

-- 
2.56.0

Re: [PATCH 0/2] regulator: fan53555: Add support for Silergy SYM827

[Mark Brown]

On Fri, 06 Nov 2026 15:13:04 +0000, Ben Grisdale wrote:
> regulator: fan53555: Add support for Silergy SYM827
> 
> The Silergy SYM827 is a 6A synchronous step-down converter with a
> similar I2C register map to the FAN53555, found in MediaTek MT8163
> devices as the external VPROC regulator. It differs from the already
> supported SYR827 in its die ID and output voltage range.
> 
> [...]

Applied to

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator.git for-7.4

Thanks!

[1/2] regulator: dt-bindings: fan53555: Add Silergy SYM827
      https://git.kernel.org/broonie/regulator/c/9d20773cdfb0
[2/2] regulator: fan53555: Add support for Silergy SYM827
      https://git.kernel.org/broonie/regulator/c/042961947662

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark