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received-spf: None (protection.outlook.com: toradex.com does not designate permitted sender hosts) x-ms-exchange-senderadcheck: 1 x-microsoft-antispam: BCL:0; x-microsoft-antispam-message-info: QDRP5Y+tzaneN5c0Uvlsb974wnamBu/52Jphx/xwfob53xuCvz1FRpKPgWw0TnsF28TV/5ZbyQyo3esabvoSQnPVaT4g9uIhFmxY4dW0S53LlT8wame0mee+twnUdGBgEocEr5A2RKkIrQmfGj3hzZjWhs3sT1TbFp1uWxS5S0qIu5F1BaHp+uNdxYD106o7WI3jIduSb6R1Tx+ZNgjD06miDlY3QHpznM21+QDy+wIhvcYibYGNzTA01NmcF833G1MVuiY7FCikrpjxfBoJgDRfy+lYIJ1vUvyLH13/gyd1FT29q5Tpe7DLWK2y12NOWpt5CIbhT9qyrahQcdUqAZGjJ+ZiwNL0XzK7JWz9yZOCVE/xKBXGh1xC892JYg+7ffLEn/l3MXSUzezM/sW6uYLu+wAUbfMdW7HIuMPriAM= Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: toradex.com X-MS-Exchange-CrossTenant-Network-Message-Id: 5723390c-272a-423e-6733-08d74591ef44 X-MS-Exchange-CrossTenant-originalarrivaltime: 30 Sep 2019 10:35:38.3856 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: d9995866-0d9b-4251-8315-093f062abab4 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: zUmxh2CZPFMmqouBF0M2w4p0t6sX3SpMq70UH1SsgsLQkHWHE1MWwcTcuYMmQ9Y0cLKMG3TU4zB2kxxLYQnQQc/lEUnj+ciBPRa7n8ZbssE= X-MS-Exchange-Transport-CrossTenantHeadersStamped: VI1PR05MB5869 Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org Property "force-mode" tells the driver to replace previously initialized power-off kernel hook and allows gpio-poweroff to probe and operate successfully in any case. Signed-off-by: Oleksandr Suvorov --- drivers/power/reset/gpio-poweroff.c | 27 +++++++++++++++++++++------ 1 file changed, 21 insertions(+), 6 deletions(-) diff --git a/drivers/power/reset/gpio-poweroff.c b/drivers/power/reset/gpio= -poweroff.c index 6a4bbb506551..cca9f36fdce6 100644 --- a/drivers/power/reset/gpio-poweroff.c +++ b/drivers/power/reset/gpio-poweroff.c @@ -24,6 +24,7 @@ static struct gpio_desc *reset_gpio; static u32 timeout =3D DEFAULT_TIMEOUT_MS; static u32 active_delay =3D 100; static u32 inactive_delay =3D 100; +static void *prev_pm_power_off; =20 static void gpio_poweroff_do_poweroff(void) { @@ -49,14 +50,28 @@ static void gpio_poweroff_do_poweroff(void) static int gpio_poweroff_probe(struct platform_device *pdev) { bool input =3D false; + bool force =3D false; enum gpiod_flags flags; =20 - /* If a pm_power_off function has already been added, leave it alone */ + + force =3D device_property_read_bool(&pdev->dev, "force-mode"); + + /* + * If a pm_power_off function has already been added, leave it alone, + * if force-mode is not enabled. + */ if (pm_power_off !=3D NULL) { - dev_err(&pdev->dev, - "%s: pm_power_off function already registered", - __func__); - return -EBUSY; + if (force) { + dev_warn(&pdev->dev, + "%s: pm_power_off function replaced", + __func__); + prev_pm_power_off =3D pm_power_off; + } else { + dev_err(&pdev->dev, + "%s: pm_power_off function already registered", + __func__); + return -EBUSY; + } } =20 input =3D device_property_read_bool(&pdev->dev, "input"); @@ -81,7 +96,7 @@ static int gpio_poweroff_probe(struct platform_device *pd= ev) static int gpio_poweroff_remove(struct platform_device *pdev) { if (pm_power_off =3D=3D &gpio_poweroff_do_poweroff) - pm_power_off =3D NULL; + pm_power_off =3D prev_pm_power_off; =20 return 0; } --=20 2.20.1