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Commit 67de10fb authored by Stefan Wahren's avatar Stefan Wahren Committed by Wolfram Sang
Browse files

i2c: bcm2835: Avoid clk stretch quirk for BCM2711 



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: default avatarStefan Wahren <wahrenst@gmx.net>
Reviewed-by: default avatarEric Anholt <eric@anholt.net>
Signed-off-by: default avatarWolfram Sang <wsa@the-dreams.de>
parent ca85ee74

drivers/i2c/busses/i2c-bcm2835.c

+5 −3
Original line number Diff line number Diff line
@@ -12,6 +12,7 @@ 
#include <linux/interrupt.h>

#include <linux/io.h>

#include <linux/module.h>

#include <linux/of_device.h>

#include <linux/platform_device.h>

#include <linux/slab.h>
@@ -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 },

	{},

};

MODULE_DEVICE_TABLE(of, bcm2835_i2c_of_match);