linux-kernel - [PATCH v4 8/8] usb: misc: onboard_hub: add support for XMOS XVF3500

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Message-Id: <20240220-onboard_xvf3500-v4-8-dc1617cc5dd4@wolfvision.net>
Date: Tue, 20 Feb 2024 15:05:52 +0100
From: Javier Carrasco <javier.carrasco@...fvision.net>
To: Liam Girdwood <lgirdwood@...il.com>, Mark Brown <broonie@...nel.org>, 
 Rob Herring <robh+dt@...nel.org>, 
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>, 
 Conor Dooley <conor+dt@...nel.org>, Matthias Kaehlcke <mka@...omium.org>, 
 Greg Kroah-Hartman <gregkh@...uxfoundation.org>, 
 Helen Koike <helen.koike@...labora.com>, 
 Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, 
 Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>, 
 David Airlie <airlied@...il.com>, Daniel Vetter <daniel@...ll.ch>, 
 Catalin Marinas <catalin.marinas@....com>, Will Deacon <will@...nel.org>, 
 Russell King <linux@...linux.org.uk>
Cc: linux-sound@...r.kernel.org, devicetree@...r.kernel.org, 
 linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org, 
 dri-devel@...ts.freedesktop.org, linux-arm-kernel@...ts.infradead.org, 
 Javier Carrasco <javier.carrasco@...fvision.net>
Subject: [PATCH v4 8/8] usb: misc: onboard_hub: add support for XMOS
 XVF3500

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@...fvision.net>
---
 drivers/usb/misc/onboard_usb_dev.c | 2 ++
 drivers/usb/misc/onboard_usb_dev.h | 8 ++++++++
 2 files changed, 10 insertions(+)

diff --git a/drivers/usb/misc/onboard_usb_dev.c b/drivers/usb/misc/onboard_usb_dev.c
index e66fcac93006..e717d1ca8d79 100644
--- a/drivers/usb/misc/onboard_usb_dev.c
+++ b/drivers/usb/misc/onboard_usb_dev.c
@@ -388,6 +388,7 @@ static struct platform_driver onboard_dev_driver = {
 #define VENDOR_ID_REALTEK	0x0bda
 #define VENDOR_ID_TI		0x0451
 #define VENDOR_ID_VIA		0x2109
+#define VENDOR_ID_XMOS		0x20B1
 
 /*
  * Returns the onboard_dev platform device that is associated with the USB
@@ -480,6 +481,7 @@ static const struct usb_device_id onboard_dev_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) }, /* XVF3500 */
 	{}
 };
 MODULE_DEVICE_TABLE(usb, onboard_dev_id_table);
diff --git a/drivers/usb/misc/onboard_usb_dev.h b/drivers/usb/misc/onboard_usb_dev.h
index 59dced6bd339..921a5276fc7f 100644
--- a/drivers/usb/misc/onboard_usb_dev.h
+++ b/drivers/usb/misc/onboard_usb_dev.h
@@ -89,6 +89,13 @@ static const struct onboard_dev_pdata vialab_vl817_data = {
 	.is_hub = true,
 };
 
+static const struct onboard_dev_pdata xmos_xvf3500_data = {
+	.reset_us = 1,
+	.num_supplies = 2,
+	.supply_names = { "vdd", "vddio" },
+	.is_hub = false,
+};
+
 static const struct of_device_id onboard_dev_match[] = {
 	{ .compatible = "usb424,2412", .data = &microchip_usb424_data, },
 	{ .compatible = "usb424,2514", .data = &microchip_usb424_data, },
@@ -110,6 +117,7 @@ static const struct of_device_id onboard_dev_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, },
 	{}
 };
 

-- 
2.40.1