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Sat, 14 Dec 2024 15:44:00 +0100 Message-ID: <44419be4-65b3-41eb-a696-cfefae84a423@web.de> Date: Sat, 14 Dec 2024 15:43:41 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird To: Maksym Holovach , Markuss Broks , linux-samsung-soc@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Alim Akhtar , Conor Dooley , Krzysztof Kozlowski , Rob Herring Cc: LKML , Ivaylo Ivanov References: <20241212-speedy-v1-2-544ad7bcfb6a@gmail.com> Subject: Re: [PATCH 2/3] soc: samsung: Add a driver for Samsung SPEEDY host controller Content-Language: en-GB From: Markus Elfring In-Reply-To: <20241212-speedy-v1-2-544ad7bcfb6a@gmail.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-Provags-ID: V03:K1:kSs8gYPdVRGvnF2Xk5QnP0ZIbQ1n6Z9KVxpWNOEeZ50ISG7PUYA mjN6tq83OreQiN9pDPdt9NmiP4sosI4rXBevsCKfcoPTRG4Vxmq3th7agMUBhslrSz1NmkX FOQ/LXt1Gs8Luldq5e7IW8zOZpMFWv9jdzd8VjWAZUWw4UwIb6VW/nEwJLv8OyqaDiBiBah 8phBX+0h8PbIhjA9FgDpw== UI-OutboundReport: notjunk:1;M01:P0:ZvnPYnJTGNM=;H3nYxlU3VlEwdOlR9qYrS5Ut6fE Wea/z7R24moiT4HMqTyR06mku3iOWEjjcy1/H8MczfTEmkq7OmBU3oDv7ZJEtLIr66j8zIxLa xKfo91wZhUsAM0VcztLeYQsswmuAFlj/2LlF/6slISmj/KwS8gB6FdOjmiDJx2pl3WAnu8MAy +iNCUo27Cisfj/R+q3lwF7ByVry75r5juxdjZAFpWmDzoQkTOnFRJj8xV+aLbP6bIBcisnV+d OQamjnBuKt51XGN9Bs8S6must0CHh+1yDv//gDqLYovmEnDl02GMFjMnq7bej6lzCQNkUVxOE UglA8DCWcNkbRZHL3ySM1yKvkeJPFc4nL9JmkpwjM4SNruIMLVHjC5cR7iau8J/u+D63c2Qmq QddAPimuz644KujsfYNKwQ9YcHL5xldpeGXyfkjhuvP7AbN0aoOH7C2S1oOopkTg7W0Hm/lw4 z/uNdETA05GWbCwptB0a2rLKkrhEkbX3fYdOvLRwotHuxEd5zX/YdElK+eU+M/EuIs+coJLns yj4LNwTdSLy+yIH2i7jYQ7IK2s1vbAknRCcT+Y6zBVx/hG+Ypgl+zfjGjeJUizt1qUBVXLNw5 Sdvb+fN8CrMDEkJhARAPttNcjqrsLqcTBbf4EwcFWjCeWByHaAH7+qibRRiTxo0mVPudOYWta EZiA+MliZs30jBq2wk8sydCtNOgXozdfSJpiGHD+v2BCVw69AOBQDusEMFOGUV4J/S7F4ilge VhVLeuKVzlmkp8pmwjOBfA3uphIZQmNZKg8BLfIHNPo//wmU7ZiWiq6lfpfeH/dYA3Vc9j4// UhVqfj4DAwk/jlIqCAnifg7IYu1MncYC6/aiG4qEN/R7e3c5lGz42xJfbl5URSxj89giS+7Yo 7L+BrO4oIjLcQyYptWGvRhEyEkaVVL8VvQi8vY4ZqpNpD/0VozC0vfUg5RhbxU8YFWUrUjZgZ YKvM0GR+4Ad6ipsIbA6s+w3u7pxkRzuOX1i0p2mjFO9aYxOmBwPsJMr2cxEbgxHU+d9JoyLjZ GQg6sjkW2GcQqML4MQXI4ZGRc3dDkMWUm6aP5RU16bV8IxowLGevu5hKwKqfNM9U6+7fikNLv 3/KdvjPr4= X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20241214_064410_943766_A8E23C33 X-CRM114-Status: UNSURE ( 6.94 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org =E2=80=A6 > SPEEDY is a proprietary 1 wire serial bus used by Samsung > in various devices =E2=80=A6 You may occasionally put more than 57 characters into text lines of such a change description. =E2=80=A6 > +++ b/drivers/soc/samsung/exynos-speedy.c > @@ -0,0 +1,457 @@ =E2=80=A6 > +static int _speedy_read(struct speedy_controller *speedy, u32 reg, u32 = addr, u32 *val) > +{ > + int ret; > + u32 cmd, int_ctl, int_status; > + > + mutex_lock(&speedy->io_lock); =E2=80=A6 > + ret =3D speedy_int_clear(speedy); > + > + mutex_unlock(&speedy->io_lock); > + > + return ret; > +} =E2=80=A6 Under which circumstances would you become interested to apply a statement like =E2=80=9Cguard(mutex)(&speedy->io_lock);=E2=80=9D? https://elixir.bootlin.com/linux/v6.13-rc2/source/include/linux/mutex.h#L2= 01 Regards, Markus