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usb: renesas_usbhs: Add reset_control

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R-Car Gen3 needs to deassert resets of both host and peripheral.
Since [eo]hci-platform is possible to assert the reset(s) when
the probing failed, renesas_usbhs driver doesn't work correctly
regardless of finished probing. To fix this issue, this patch adds
reset_control on this renesas_usbhs driver.

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Yoshihiro Shimoda 2018-09-11 17:47:03 +09:00 committed by Greg Kroah-Hartman
parent c29e240484
commit f181dbb482
2 changed files with 14 additions and 0 deletions
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12
drivers/usb/renesas_usbhs/common.c
View File

@ -12,6 +12,7 @@
#include <linux/of_device.h>
#include <linux/of_gpio.h>
#include <linux/pm_runtime.h>
#include <linux/reset.h>
#include <linux/slab.h>
#include <linux/sysfs.h>
#include "common.h"
@ -574,6 +575,10 @@ static int usbhs_probe(struct platform_device *pdev)
return PTR_ERR(priv->edev);
}
priv->rsts = devm_reset_control_array_get_optional_shared(&pdev->dev);
if (IS_ERR(priv->rsts))
return PTR_ERR(priv->rsts);
/*
* care platform info
*/
@ -658,6 +663,10 @@ static int usbhs_probe(struct platform_device *pdev)
/* dev_set_drvdata should be called after usbhs_mod_init */
platform_set_drvdata(pdev, priv);
ret = reset_control_deassert(priv->rsts);
if (ret)
goto probe_fail_rst;
/*
* deviece reset here because
* USB device might be used in boot loader.
@ -711,6 +720,8 @@ static int usbhs_probe(struct platform_device *pdev)
return ret;
probe_end_mod_exit:
reset_control_assert(priv->rsts);
probe_fail_rst:
usbhs_mod_remove(priv);
probe_end_fifo_exit:
usbhs_fifo_remove(priv);
@ -739,6 +750,7 @@ static int usbhs_remove(struct platform_device *pdev)
pm_runtime_disable(&pdev->dev);
usbhs_platform_call(priv, hardware_exit, pdev);
reset_control_assert(priv->rsts);
usbhs_mod_remove(priv);
usbhs_fifo_remove(priv);
usbhs_pipe_remove(priv);

2
drivers/usb/renesas_usbhs/common.h
View File

@ -10,6 +10,7 @@
#include <linux/extcon.h>
#include <linux/platform_device.h>
#include <linux/reset.h>
#include <linux/usb/renesas_usbhs.h>
struct usbhs_priv;
@ -277,6 +278,7 @@ struct usbhs_priv {
struct usbhs_fifo_info fifo_info;
struct phy *phy;
struct reset_control *rsts;
};
/*