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[109.252.90.13]) by smtp.gmail.com with ESMTPSA id q16-v6sm2175912ljj.68.2018.08.06.02.14.04 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 06 Aug 2018 02:14:04 -0700 (PDT) From: Dmitry Osipenko To: Linus Walleij , Thierry Reding , Jonathan Hunter , Stefan Agner , Marcel Ziswiler Cc: linux-tegra@vger.kernel.org, linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 1/2] pinctrl: tegra: Move drivers registration to arch_init level Date: Mon, 6 Aug 2018 12:12:06 +0300 Message-Id: <20180806091207.12586-1-digetx@gmail.com> X-Mailer: git-send-email 2.18.0 Sender: linux-tegra-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-tegra@vger.kernel.org There is a bug in regards to deferred probing within the drivers core that causes GPIO-driver to suspend before its users. The bug appears if GPIO-driver probe is getting deferred, which happens after introducing dependency on PINCTRL-driver for the GPIO-driver by defining "gpio-ranges" property in device-tree. The bug in the drivers core is old (more than 4 years now) and is well known, unfortunately there is no easy fix for it. The good news is that we can workaround the deferred probe issue by changing GPIO / PINCTRL drivers registration order and hence by moving PINCTRL driver registration to the arch_init level and GPIO to the subsys_init. Signed-off-by: Dmitry Osipenko Acked-by: Stefan Agner --- Changelog: v2: Corrected commit message with s/to suspend after/to suspend before/. drivers/pinctrl/tegra/pinctrl-tegra114.c | 7 ++++++- drivers/pinctrl/tegra/pinctrl-tegra124.c | 7 ++++++- drivers/pinctrl/tegra/pinctrl-tegra20.c | 7 ++++++- drivers/pinctrl/tegra/pinctrl-tegra210.c | 7 ++++++- drivers/pinctrl/tegra/pinctrl-tegra30.c | 7 ++++++- 5 files changed, 30 insertions(+), 5 deletions(-) diff --git a/drivers/pinctrl/tegra/pinctrl-tegra114.c b/drivers/pinctrl/tegra/pinctrl-tegra114.c index 511a8774fd8d..d43c209e9c30 100644 --- a/drivers/pinctrl/tegra/pinctrl-tegra114.c +++ b/drivers/pinctrl/tegra/pinctrl-tegra114.c @@ -1868,4 +1868,9 @@ static struct platform_driver tegra114_pinctrl_driver = { }, .probe = tegra114_pinctrl_probe, }; -builtin_platform_driver(tegra114_pinctrl_driver); + +static int __init tegra114_pinctrl_init(void) +{ + return platform_driver_register(&tegra114_pinctrl_driver); +} +arch_initcall(tegra114_pinctrl_init); diff --git a/drivers/pinctrl/tegra/pinctrl-tegra124.c b/drivers/pinctrl/tegra/pinctrl-tegra124.c index 57e3cdcf4503..5b07a5834d15 100644 --- a/drivers/pinctrl/tegra/pinctrl-tegra124.c +++ b/drivers/pinctrl/tegra/pinctrl-tegra124.c @@ -2080,4 +2080,9 @@ static struct platform_driver tegra124_pinctrl_driver = { }, .probe = tegra124_pinctrl_probe, }; -builtin_platform_driver(tegra124_pinctrl_driver); + +static int __init tegra124_pinctrl_init(void) +{ + return platform_driver_register(&tegra124_pinctrl_driver); +} +arch_initcall(tegra124_pinctrl_init); diff --git a/drivers/pinctrl/tegra/pinctrl-tegra20.c b/drivers/pinctrl/tegra/pinctrl-tegra20.c index 624889ed3a9d..1fc82a9576e0 100644 --- a/drivers/pinctrl/tegra/pinctrl-tegra20.c +++ b/drivers/pinctrl/tegra/pinctrl-tegra20.c @@ -2277,4 +2277,9 @@ static struct platform_driver tegra20_pinctrl_driver = { }, .probe = tegra20_pinctrl_probe, }; -builtin_platform_driver(tegra20_pinctrl_driver); + +static int __init tegra20_pinctrl_init(void) +{ + return platform_driver_register(&tegra20_pinctrl_driver); +} +arch_initcall(tegra20_pinctrl_init); diff --git a/drivers/pinctrl/tegra/pinctrl-tegra210.c b/drivers/pinctrl/tegra/pinctrl-tegra210.c index 0956a1c73391..3e77f5474dd8 100644 --- a/drivers/pinctrl/tegra/pinctrl-tegra210.c +++ b/drivers/pinctrl/tegra/pinctrl-tegra210.c @@ -1582,4 +1582,9 @@ static struct platform_driver tegra210_pinctrl_driver = { }, .probe = tegra210_pinctrl_probe, }; -builtin_platform_driver(tegra210_pinctrl_driver); + +static int __init tegra210_pinctrl_init(void) +{ + return platform_driver_register(&tegra210_pinctrl_driver); +} +arch_initcall(tegra210_pinctrl_init); diff --git a/drivers/pinctrl/tegra/pinctrl-tegra30.c b/drivers/pinctrl/tegra/pinctrl-tegra30.c index c923ad58af84..10e617003e9c 100644 --- a/drivers/pinctrl/tegra/pinctrl-tegra30.c +++ b/drivers/pinctrl/tegra/pinctrl-tegra30.c @@ -2503,4 +2503,9 @@ static struct platform_driver tegra30_pinctrl_driver = { }, .probe = tegra30_pinctrl_probe, }; -builtin_platform_driver(tegra30_pinctrl_driver); + +static int __init tegra30_pinctrl_init(void) +{ + return platform_driver_register(&tegra30_pinctrl_driver); +} +arch_initcall(tegra30_pinctrl_init);