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Branden References: <1566925456-5928-1-git-send-email-wahrenst@gmx.net> <1566925456-5928-3-git-send-email-wahrenst@gmx.net> From: Matthias Brugger Openpgp: preference=signencrypt Autocrypt: addr=matthias.bgg@gmail.com; prefer-encrypt=mutual; keydata= mQINBFP1zgUBEAC21D6hk7//0kOmsUrE3eZ55kjc9DmFPKIz6l4NggqwQjBNRHIMh04BbCMY fL3eT7ZsYV5nur7zctmJ+vbszoOASXUpfq8M+S5hU2w7sBaVk5rpH9yW8CUWz2+ZpQXPJcFa OhLZuSKB1F5JcvLbETRjNzNU7B3TdS2+zkgQQdEyt7Ij2HXGLJ2w+yG2GuR9/iyCJRf10Okq gTh//XESJZ8S6KlOWbLXRE+yfkKDXQx2Jr1XuVvM3zPqH5FMg8reRVFsQ+vI0b+OlyekT/Xe 0Hwvqkev95GG6x7yseJwI+2ydDH6M5O7fPKFW5mzAdDE2g/K9B4e2tYK6/rA7Fq4cqiAw1+u EgO44+eFgv082xtBez5WNkGn18vtw0LW3ESmKh19u6kEGoi0WZwslCNaGFrS4M7OH+aOJeqK fx5dIv2CEbxc6xnHY7dwkcHikTA4QdbdFeUSuj4YhIZ+0QlDVtS1QEXyvZbZky7ur9rHkZvP ZqlUsLJ2nOqsmahMTIQ8Mgx9SLEShWqD4kOF4zNfPJsgEMB49KbS2o9jxbGB+JKupjNddfxZ HlH1KF8QwCMZEYaTNogrVazuEJzx6JdRpR3sFda/0x5qjTadwIW6Cl9tkqe2h391dOGX1eOA 1ntn9O/39KqSrWNGvm+1raHK+Ev1yPtn0Wxn+0oy1tl67TxUjQARAQABtClNYXR0aGlhcyBC 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cv+fOTfJj0/KwFXJaaYh3LUQNILLBNxkSrhCLl8dUg53IbHx4NfIAgqxLWGfXM8DY1aFdU79 pac005PuhxCWkKTJz3gCmznnoat4GCnL5gy/m0Qk45l4PFqwWXVLo9AQg2Kp3mlIFZ6fsEKI AN5hxlbNvNb9V2Zo5bFZjPWPFTxOteM0omUAS+QopwU0yPLLGJVf2iCmItHcUXI+r2JwH1CJ jrHWeQEI2ucSKsNa8FllDmG/fQ== Message-ID: Date: Thu, 12 Sep 2019 19:21:02 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0 MIME-Version: 1.0 In-Reply-To: <1566925456-5928-3-git-send-email-wahrenst@gmx.net> Content-Language: en-US X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190912_102106_180845_7A0A6A36 X-CRM114-Status: GOOD ( 23.44 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-i2c@vger.kernel.org, linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 27/08/2019 19:04, Stefan Wahren wrote: > The I2C block on the BCM2711 isn't affected by the clk stretching bug. > So there is no need to apply the corresponding quirk. > > Signed-off-by: Stefan Wahren > Reviewed-by: Eric Anholt > --- > drivers/i2c/busses/i2c-bcm2835.c | 8 +++++--- > 1 file changed, 5 insertions(+), 3 deletions(-) > > diff --git a/drivers/i2c/busses/i2c-bcm2835.c b/drivers/i2c/busses/i2c-bcm2835.c > index 67752f7..ab5502f 100644 > --- a/drivers/i2c/busses/i2c-bcm2835.c > +++ b/drivers/i2c/busses/i2c-bcm2835.c > @@ -12,6 +12,7 @@ > #include > #include > #include > +#include > #include > #include > > @@ -389,7 +390,7 @@ static const struct i2c_algorithm bcm2835_i2c_algo = { > }; > > /* > - * This HW was reported to have problems with clock stretching: > + * The BCM2835 was reported to have problems with clock stretching: > * http://www.advamation.com/knowhow/raspberrypi/rpi-i2c-bug.html > * https://www.raspberrypi.org/forums/viewtopic.php?p=146272 > */ > @@ -475,7 +476,7 @@ static int bcm2835_i2c_probe(struct platform_device *pdev) > adap->algo = &bcm2835_i2c_algo; > adap->dev.parent = &pdev->dev; > adap->dev.of_node = pdev->dev.of_node; > - adap->quirks = &bcm2835_i2c_quirks; > + adap->quirks = of_device_get_match_data(&pdev->dev); > > bcm2835_i2c_writel(i2c_dev, BCM2835_I2C_C, 0); > > @@ -501,7 +502,8 @@ static int bcm2835_i2c_remove(struct platform_device *pdev) > } > > static const struct of_device_id bcm2835_i2c_of_match[] = { > - { .compatible = "brcm,bcm2835-i2c" }, > + { .compatible = "brcm,bcm2711-i2c" }, > + { .compatible = "brcm,bcm2835-i2c", .data = &bcm2835_i2c_quirks }, RPi4 FW seems to still use bcm2835-i2c as compatible in it's DTB blob. Does this break the driver or is this something we can improve by changing the FW blob in the future without breaking the driver now? Regards, Matthias > {}, > }; > MODULE_DEVICE_TABLE(of, bcm2835_i2c_of_match); > -- > 2.7.4 > > > _______________________________________________ > linux-arm-kernel mailing list > linux-arm-kernel@lists.infradead.org > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel > _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel