diff options
| author | Tommaso Merciai <tommaso.merciai.xr@bp.renesas.com> | 2026-04-01 18:16:11 +0300 |
|---|---|---|
| committer | Philipp Zabel <p.zabel@pengutronix.de> | 2026-04-01 19:16:09 +0300 |
| commit | f62fcdf8ab826ffc811552e29a6dd8544281fd97 (patch) | |
| tree | a09b931ff490baaa537ed4d65a19e90223f82ec9 | |
| parent | 890628c8d0f156a80a0aea02803d31fd8dd83fc0 (diff) | |
| download | linux-f62fcdf8ab826ffc811552e29a6dd8544281fd97.tar.xz | |
reset: rzv2h-usb2phy: Add support for VBUS mux controller registration
The RZ/V2H USB2 PHY requires control of the VBUS selection line
(VBENCTL) through a mux controller described in the device tree as
"mux-controller". This change adds support for registering the
rzv2h-usb-vbenctl auxiliary driver during probe.
This enables proper management of USB2.0 VBUS source selection on
platforms using the RZ/V2H SoC.
Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Tommaso Merciai <tommaso.merciai.xr@bp.renesas.com>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
| -rw-r--r-- | drivers/reset/Kconfig | 1 | ||||
| -rw-r--r-- | drivers/reset/reset-rzv2h-usb2phy.c | 35 |
2 files changed, 36 insertions, 0 deletions
diff --git a/drivers/reset/Kconfig b/drivers/reset/Kconfig index a2f56ea470c5..2fda1d9622f4 100644 --- a/drivers/reset/Kconfig +++ b/drivers/reset/Kconfig @@ -257,6 +257,7 @@ config RESET_RZG2L_USBPHY_CTRL config RESET_RZV2H_USB2PHY tristate "Renesas RZ/V2H(P) (and similar SoCs) USB2PHY Reset driver" depends on ARCH_RENESAS || COMPILE_TEST + select AUXILIARY_BUS select REGMAP_MMIO help Support for USB2PHY Port reset Control found on the RZ/V2H(P) SoC diff --git a/drivers/reset/reset-rzv2h-usb2phy.c b/drivers/reset/reset-rzv2h-usb2phy.c index c79bf72602e8..d96042e28cd5 100644 --- a/drivers/reset/reset-rzv2h-usb2phy.c +++ b/drivers/reset/reset-rzv2h-usb2phy.c @@ -5,7 +5,9 @@ * Copyright (C) 2025 Renesas Electronics Corporation */ +#include <linux/auxiliary_bus.h> #include <linux/delay.h> +#include <linux/idr.h> #include <linux/io.h> #include <linux/module.h> #include <linux/of.h> @@ -15,6 +17,8 @@ #include <linux/reset.h> #include <linux/reset-controller.h> +static DEFINE_IDA(auxiliary_ids); + struct rzv2h_usb2phy_reset_of_data { const struct reg_sequence *init_seq; unsigned int init_nseq; @@ -84,6 +88,33 @@ static int rzv2h_usb2phy_reset_of_xlate(struct reset_controller_dev *rcdev, return 0; } +static void rzv2h_usb2phy_reset_ida_free(void *data) +{ + struct auxiliary_device *adev = data; + + ida_free(&auxiliary_ids, adev->id); +} + +static int rzv2h_usb2phy_reset_mux_register(struct device *dev, + const char *mux_name) +{ + struct auxiliary_device *adev; + int id; + + id = ida_alloc(&auxiliary_ids, GFP_KERNEL); + if (id < 0) + return id; + + adev = __devm_auxiliary_device_create(dev, dev->driver->name, + mux_name, NULL, id); + if (!adev) { + ida_free(&auxiliary_ids, id); + return -ENOMEM; + } + + return devm_add_action_or_reset(dev, rzv2h_usb2phy_reset_ida_free, adev); +} + static const struct regmap_config rzv2h_usb2phy_reset_regconf = { .reg_bits = 32, .val_bits = 32, @@ -153,6 +184,10 @@ static int rzv2h_usb2phy_reset_probe(struct platform_device *pdev) if (error) return dev_err_probe(dev, error, "could not register reset controller\n"); + error = rzv2h_usb2phy_reset_mux_register(dev, "vbenctl"); + if (error) + return dev_err_probe(dev, error, "could not register aux mux\n"); + return 0; } |