From: Andrey Smirnov <andrew.smirnov@gmail.com>
To: barebox@lists.infradead.org
Cc: Andrey Smirnov <andrew.smirnov@gmail.com>
Subject: [PATCH 2/7] mfd: syscon: Don't call request_iomem_region()
Date: Wed, 13 Jul 2016 23:11:00 -0700 [thread overview]
Message-ID: <1468476665-26409-2-git-send-email-andrew.smirnov@gmail.com> (raw)
In-Reply-To: <1468476665-26409-1-git-send-email-andrew.smirnov@gmail.com>
On platforms that mix dedicated IP block register space with
miscellaneous registers it is necessary to share register window between
syscon and dedicated IP block driver. Calling request_iomem_region()
implies exclusive ownership of the region, which, in the case above
could not happen.
This change also makes this driver's behaviour to that of its Linux
kernel counterpart.
Suggested-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
---
drivers/mfd/syscon.c | 6 ------
1 file changed, 6 deletions(-)
diff --git a/drivers/mfd/syscon.c b/drivers/mfd/syscon.c
index 9589a03..ac46122 100644
--- a/drivers/mfd/syscon.c
+++ b/drivers/mfd/syscon.c
@@ -76,12 +76,6 @@ static int syscon_probe(struct device_d *dev)
return PTR_ERR(res);
}
- res = request_iomem_region(dev_name(dev), res->start, res->end);
- if (IS_ERR(res)) {
- free(syscon);
- return PTR_ERR(res);
- }
-
syscon->base = (void __iomem *)res->start;
dev->priv = syscon;
--
2.5.5
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next prev parent reply other threads:[~2016-07-14 6:11 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-07-14 6:10 [PATCH 1/7] Revert "syscon: Decrease driver registration priority" Andrey Smirnov
2016-07-14 6:11 ` Andrey Smirnov [this message]
2016-07-15 5:53 ` [PATCH 2/7] mfd: syscon: Don't call request_iomem_region() Sascha Hauer
2016-07-15 9:11 ` Re[2]: " Alexander Shiyan
2016-07-14 6:11 ` [PATCH 3/7] mfd: syscon: Decouple syscon interface from platform devices Andrey Smirnov
2016-07-15 5:59 ` Sascha Hauer
2016-07-15 21:50 ` Andrey Smirnov
2016-07-18 6:18 ` Sascha Hauer
2016-07-14 6:11 ` [PATCH 4/7] mfd: syscon: Don't check xzalloc return for NULL Andrey Smirnov
2016-07-14 6:11 ` [PATCH 5/7] mfd: syscon: Use IOMEM instead of explicit cast Andrey Smirnov
2016-07-14 6:11 ` [PATCH 6/7] imx_thermal: Remove leftover debug output Andrey Smirnov
2016-07-14 6:11 ` [PATCH 7/7] i.MX: ocotp: Register regmap against orignal device Andrey Smirnov
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