From: Arnd Bergmann <arnd@kernel.org>
To: Thor Thayer <thor.thayer@linux.intel.com>,
Lee Jones <lee.jones@linaro.org>
Cc: Arnd Bergmann <arnd@arndb.de>, linux-kernel@vger.kernel.org
Subject: [PATCH] mfd: altera-sysmgr: Fix physical address storing more
Date: Thu, 3 Dec 2020 23:52:48 +0100 [thread overview]
Message-ID: <20201203225252.1476897-1-arnd@kernel.org> (raw)
From: Arnd Bergmann <arnd@arndb.de>
A recent fix improved the way the resource gets passed to
the low-level accessors, but left one warning that appears
in configurations with a resource_size_t that is wider than
a pointer:
In file included from drivers/mfd/altera-sysmgr.c:19:
drivers/mfd/altera-sysmgr.c: In function 'sysmgr_probe':
drivers/mfd/altera-sysmgr.c:148:40: error: cast to pointer from integer of different size [-Werror=int-to-pointer-cast]
148 | regmap = devm_regmap_init(dev, NULL, (void *)res->start,
| ^
include/linux/regmap.h:646:6: note: in definition of macro '__regmap_lockdep_wrapper'
646 | fn(__VA_ARGS__, &_key, \
| ^~~~~~~~~~~
drivers/mfd/altera-sysmgr.c:148:12: note: in expansion of macro 'devm_regmap_init'
148 | regmap = devm_regmap_init(dev, NULL, (void *)res->start,
| ^~~~~~~~~~~~~~~~
I had tried a different approach that would store the address
in the private data as a phys_addr_t, but the easiest solution
now seems to be to add a double cast to shut up the warning.
As the address is passed to an inline assembly, it is guaranteed
to not be wider than a register anyway.
Fixes: d9ca7801b6e5 ("mfd: altera-sysmgr: Fix physical address storing hacks")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
drivers/mfd/altera-sysmgr.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/mfd/altera-sysmgr.c b/drivers/mfd/altera-sysmgr.c
index 41076d121dd5..591b300d9095 100644
--- a/drivers/mfd/altera-sysmgr.c
+++ b/drivers/mfd/altera-sysmgr.c
@@ -145,7 +145,8 @@ static int sysmgr_probe(struct platform_device *pdev)
sysmgr_config.reg_write = s10_protected_reg_write;
/* Need physical address for SMCC call */
- regmap = devm_regmap_init(dev, NULL, (void *)res->start,
+ regmap = devm_regmap_init(dev, NULL,
+ (void *)(uintptr_t)res->start,
&sysmgr_config);
} else {
base = devm_ioremap(dev, res->start, resource_size(res));
--
2.27.0
next reply other threads:[~2020-12-03 22:53 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-03 22:52 Arnd Bergmann [this message]
2020-12-16 8:46 ` [PATCH] mfd: altera-sysmgr: Fix physical address storing more Lee Jones
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