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From: Javier Carrasco <javier.carrasco@wolfvision.net>
Date: Tue, 30 Jan 2024 13:26:57 +0100
Subject: [PATCH 2/2] usb: misc: onboard_hub: add support for XMOS XVF3500
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Message-Id: <20240130-onboard_xvf3500-v1-2-51b5398406cb@wolfvision.net>
References: <20240130-onboard_xvf3500-v1-0-51b5398406cb@wolfvision.net>
In-Reply-To: <20240130-onboard_xvf3500-v1-0-51b5398406cb@wolfvision.net>
To: Liam Girdwood <lgirdwood@gmail.com>, Mark Brown <broonie@kernel.org>, 
 Rob Herring <robh+dt@kernel.org>, 
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>, 
 Conor Dooley <conor+dt@kernel.org>, Matthias Kaehlcke <mka@chromium.org>, 
 Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: linux-sound@vger.kernel.org, devicetree@vger.kernel.org, 
 linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, 
 Javier Carrasco <javier.carrasco@wolfvision.net>
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The XMOS XVF3500 VocalFusion Voice Processor[1] is a low-latency, 32-bit
multicore controller for voice processing.

This device requires a specific power sequence, which consists of
enabling the regulators that control the 3V3 and 1V0 device supplies,
and a reset de-assertion after a delay of at least 100ns. Such power
sequence is already supported by the onboard_hub driver, and it can be
reused for non-hub USB devices as well.

Once in normal operation, the XVF3500 registers itself as a USB device,
and it does not require any device-specific operations in the driver.

[1] https://www.xmos.com/xvf3500/

Signed-off-by: Javier Carrasco <javier.carrasco@wolfvision.net>
---
 drivers/usb/misc/onboard_usb_hub.c | 2 ++
 drivers/usb/misc/onboard_usb_hub.h | 6 ++++++
 2 files changed, 8 insertions(+)

diff --git a/drivers/usb/misc/onboard_usb_hub.c b/drivers/usb/misc/onboard_usb_hub.c
index 0dd2b032c90b..f16ea3053f84 100644
--- a/drivers/usb/misc/onboard_usb_hub.c
+++ b/drivers/usb/misc/onboard_usb_hub.c
@@ -366,6 +366,7 @@ static struct platform_driver onboard_hub_driver = {
 #define VENDOR_ID_REALTEK	0x0bda
 #define VENDOR_ID_TI		0x0451
 #define VENDOR_ID_VIA		0x2109
+#define VENDOR_ID_XMOS		0x20B1
 
 /*
  * Returns the onboard_hub platform device that is associated with the USB
@@ -458,6 +459,7 @@ static const struct usb_device_id onboard_hub_id_table[] = {
 	{ USB_DEVICE(VENDOR_ID_TI, 0x8142) }, /* TI USB8041 2.0 */
 	{ USB_DEVICE(VENDOR_ID_VIA, 0x0817) }, /* VIA VL817 3.1 */
 	{ USB_DEVICE(VENDOR_ID_VIA, 0x2817) }, /* VIA VL817 2.0 */
+	{ USB_DEVICE(VENDOR_ID_XMOS, 0x0013) }, /* XMOS XVF3500 */
 	{}
 };
 MODULE_DEVICE_TABLE(usb, onboard_hub_id_table);
diff --git a/drivers/usb/misc/onboard_usb_hub.h b/drivers/usb/misc/onboard_usb_hub.h
index f360d5cf8d8a..1809c0923b98 100644
--- a/drivers/usb/misc/onboard_usb_hub.h
+++ b/drivers/usb/misc/onboard_usb_hub.h
@@ -56,6 +56,11 @@ static const struct onboard_hub_pdata vialab_vl817_data = {
 	.num_supplies = 1,
 };
 
+static const struct onboard_hub_pdata xmos_xvf3500_data = {
+	.reset_us = 1,
+	.num_supplies = 2,
+};
+
 static const struct of_device_id onboard_hub_match[] = {
 	{ .compatible = "usb424,2412", .data = &microchip_usb424_data, },
 	{ .compatible = "usb424,2514", .data = &microchip_usb424_data, },
@@ -77,6 +82,7 @@ static const struct of_device_id onboard_hub_match[] = {
 	{ .compatible = "usbbda,5414", .data = &realtek_rts5411_data, },
 	{ .compatible = "usb2109,817", .data = &vialab_vl817_data, },
 	{ .compatible = "usb2109,2817", .data = &vialab_vl817_data, },
+	{ .compatible = "usb20b1,0013", .data = &xmos_xvf3500_data, },
 	{}
 };
 

-- 
2.39.2