From: Andrzej Hajda <a.hajda@samsung.com>
To: Wolfram Sang <wsa@the-dreams.de>, Andi Shyti <andi.shyti@samsung.com>
Cc: Andrzej Hajda <a.hajda@samsung.com>,
Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>,
Marek Szyprowski <m.szyprowski@samsung.com>,
"open list:I2C SUBSYSTEM" <linux-i2c@vger.kernel.org>,
"moderated list:ARM/SAMSUNG EXYNOS ARM ARCHITECTURES"
<linux-samsung-soc@vger.kernel.org>
Subject: [PATCH 0/3] i2c: exynos5: bus recovery implementation
Date: Thu, 30 Nov 2017 15:30:04 +0100 [thread overview]
Message-ID: <20171130143007.30258-1-a.hajda@samsung.com> (raw)
In-Reply-To: CGME20171130143017eucas1p172b94622814eff172a27176c82f6e6fe@eucas1p1.samsung.com
Hi,
This patchset adds bus recovery functionality to Exynos HSI2C, it is used in
case of transmission timeouts.
Internal tests shows that it significantly improves I2C transmissions.
Andi, could you take a look at it/test, feedback welcome.
Later, I will post also patches to MHL chip which uses this functionality.
MHL chip has known bug of being in incorrect state after hard reset,
I2C bus recovery cures it.
Regards
Andrzej
Andrzej Hajda (3):
i2c: exynos5: change internal transmission timeout to 100ms
i2c: exynos5: implement bus recovery functionality
i2c: exynos5: do not check TRANS_STATUS in case of Exynos7 variant
drivers/i2c/busses/i2c-exynos5.c | 52 +++++++++++++++++++++++++++++++++-------
1 file changed, 44 insertions(+), 8 deletions(-)
--
2.15.0
next parent reply other threads:[~2017-11-30 14:30 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CGME20171130143017eucas1p172b94622814eff172a27176c82f6e6fe@eucas1p1.samsung.com>
2017-11-30 14:30 ` Andrzej Hajda [this message]
[not found] ` <CGME20171130143017eucas1p2f68094c72e4559e1a16cf334c3200950@eucas1p2.samsung.com>
2017-11-30 14:30 ` [PATCH 1/3] i2c: exynos5: change internal transmission timeout to 100ms Andrzej Hajda
2018-01-15 20:54 ` [1/3] " Wolfram Sang
[not found] ` <CGME20171130143018eucas1p13bd2ce9263f9ac016ab3b779920b512e@eucas1p1.samsung.com>
2017-11-30 14:30 ` [PATCH 2/3] i2c: exynos5: implement bus recovery functionality Andrzej Hajda
2018-01-15 20:52 ` [2/3] " Wolfram Sang
2018-01-16 8:35 ` Andrzej Hajda
2018-01-17 23:30 ` Wolfram Sang
[not found] ` <CGME20171130143018eucas1p1eba2c4f3361e0752cc53a25d217ce616@eucas1p1.samsung.com>
2017-11-30 14:30 ` [PATCH 3/3] i2c: exynos5: do not check TRANS_STATUS in case of Exynos7 variant Andrzej Hajda
2018-01-15 20:53 ` [3/3] " Wolfram Sang
2018-01-16 9:40 ` Andrzej Hajda
2018-01-17 23:23 ` Wolfram Sang
2018-01-26 7:17 ` Andrzej Hajda
2018-01-26 9:30 ` Wolfram Sang
2017-12-07 7:36 ` [PATCH 0/3] i2c: exynos5: bus recovery implementation Andi Shyti
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