Commit 224eb531 authored by Biju Das's avatar Biju Das Committed by Greg Kroah-Hartman
Browse files

usb: host: xhci-plat: Add reset support 



Add optional reset support. This is in preparation to adding USB xHCI
support for RZ/V2M SoC.

Signed-off-by: default avatarBiju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: default avatarGeert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20230121145853.4792-9-biju.das.jz@bp.renesas.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 8c6e8b09

drivers/usb/host/xhci-plat.c

+16 −1
Original line number Diff line number Diff line
@@ -19,6 +19,7 @@ 
#include <linux/slab.h>

#include <linux/acpi.h>

#include <linux/usb/of.h>

#include <linux/reset.h>



#include "xhci.h"

#include "xhci-plat.h"
@@ -263,10 +264,20 @@ static int xhci_plat_probe(struct platform_device *pdev) 
		goto put_hcd;

	}



	ret = clk_prepare_enable(xhci->reg_clk);

	xhci->reset = devm_reset_control_array_get_optional_shared(&pdev->dev);

	if (IS_ERR(xhci->reset)) {

		ret = PTR_ERR(xhci->reset);

		goto put_hcd;

	}



	ret = reset_control_deassert(xhci->reset);

	if (ret)

		goto put_hcd;



	ret = clk_prepare_enable(xhci->reg_clk);

	if (ret)

		goto err_reset;



	ret = clk_prepare_enable(xhci->clk);

	if (ret)

		goto disable_reg_clk;
@@ -377,6 +388,9 @@ static int xhci_plat_probe(struct platform_device *pdev) 
disable_reg_clk:

	clk_disable_unprepare(xhci->reg_clk);



err_reset:

	reset_control_assert(xhci->reset);



put_hcd:

	usb_put_hcd(hcd);
@@ -412,6 +426,7 @@ static int xhci_plat_remove(struct platform_device *dev) 


	clk_disable_unprepare(clk);

	clk_disable_unprepare(reg_clk);

	reset_control_assert(xhci->reset);

	usb_put_hcd(hcd);



	pm_runtime_disable(&dev->dev);