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From: Sudeep Holla <sudeep.holla@arm.com>
To: Andy Shevchenko <andy.shevchenko@gmail.com>,
	Jeremy Linton <jeremy.linton@arm.com>
Cc: Sudeep Holla <sudeep.holla@arm.com>,
	ACPI Devel Maling List <linux-acpi@vger.kernel.org>,
	linux-arm Mailing List <linux-arm-kernel@lists.infradead.org>,
	Lorenzo Pieralisi <Lorenzo.Pieralisi@arm.com>,
	Hanjun Guo <hanjun.guo@linaro.org>,
	"Rafael J. Wysocki" <rjw@rjwysocki.net>,
	Will Deacon <Will.Deacon@arm.com>,
	Catalin Marinas <Catalin.Marinas@arm.com>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Mark Rutland <Mark.Rutland@arm.com>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	linux-riscv@lists.infradead.org,
	Xiongfeng Wang <wangxiongfeng2@huawei.com>,
	vkilari@codeaurora.org, Al Stone <ahs3@redhat.com>,
	Dietmar.Eggemann@arm.com, Morten.Rasmussen@arm.com,
	Palmer Dabbelt <palmer@sifive.com>, Len Brown <lenb@kernel.org>,
	John Garry <john.garry@huawei.com>,
	austinwc@codeaurora.org, tnowicki@caviumnetworks.com,
	jhugo@codeaurora.org, Ard Biesheuvel <ard.biesheuvel@linaro.org>
Subject: Re: [PATCH v9 02/12] drivers: base: cacheinfo: setup DT cache properties early
Date: Thu, 17 May 2018 16:47:01 +0100	[thread overview]
Message-ID: <20180517154701.GA20281@e107155-lin> (raw)
In-Reply-To: <a64ed431-0f60-2711-4138-eeefc7ba2d8b@arm.com>

On 16/05/18 11:56, Sudeep Holla wrote:
> Hi Andy,
> 
> On 15/05/18 20:32, Andy Shevchenko wrote:
>> On Tue, May 15, 2018 at 8:15 PM, Jeremy Linton <jeremy.linton@arm.com> wrote:
>>> On 05/11/2018 06:57 PM, Jeremy Linton wrote:
>>
>>>>   -     cache_size = of_get_property(this_leaf->of_node, propname, NULL);
>>>> +       cache_size = of_get_property(np, propname, NULL);
>>>>         if (cache_size)
>>>>                 this_leaf->size = of_read_number(cache_size, 1);
>>
>> Can't you switch to of_read_property_uXX() variant here?
>>
> 
> This patch is just changing the first argument to the calls. So if we
> need to change, it has to be separate patch.
> 
> Now, we can use of_property_read_u64() but is there any particular
> reason you mention that ? One reason I can see is that we can avoid
> making explicit of_get_property call. Just wanted to the motive before I
> can write the patch.
> 

Is below patch does what you were looking for ?

Regards,
Sudeep

--
>From 71f1c10ddb5915a92fa74d38a4e2406d0ab27845 Mon Sep 17 00:00:00 2001
From: Sudeep Holla <sudeep.holla@arm.com>
Date: Wed, 16 May 2018 13:45:53 +0100
Subject: [PATCH] drivers: base: cacheinfo: use OF property_read_u64 instead of
 get_property,read_number

of_property_read_u64 searches for a property in a device node and read
a 64-bit value from it. Instead of using of_get_property to get the
property and then read 64-bit value using of_read_number, we can make
use of of_property_read_u64.

Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
---
 drivers/base/cacheinfo.c | 24 +++++++++++-------------
 1 file changed, 11 insertions(+), 13 deletions(-)

diff --git a/drivers/base/cacheinfo.c b/drivers/base/cacheinfo.c
index 2880e2ab01f5..56715014f07b 100644
--- a/drivers/base/cacheinfo.c
+++ b/drivers/base/cacheinfo.c
@@ -74,22 +74,21 @@ static inline int get_cacheinfo_idx(enum cache_type type)
 static void cache_size(struct cacheinfo *this_leaf, struct device_node *np)
 {
 	const char *propname;
-	const __be32 *cache_size;
+	u64 cache_size;
 	int ct_idx;
 
 	ct_idx = get_cacheinfo_idx(this_leaf->type);
 	propname = cache_type_info[ct_idx].size_prop;
 
-	cache_size = of_get_property(np, propname, NULL);
-	if (cache_size)
-		this_leaf->size = of_read_number(cache_size, 1);
+	if (!of_property_read_u64(np, propname, &cache_size))
+		this_leaf->size = cache_size;
 }
 
 /* not cache_line_size() because that's a macro in include/linux/cache.h */
 static void cache_get_line_size(struct cacheinfo *this_leaf,
 				struct device_node *np)
 {
-	const __be32 *line_size;
+	u64 line_size;
 	int i, lim, ct_idx;
 
 	ct_idx = get_cacheinfo_idx(this_leaf->type);
@@ -99,27 +98,26 @@ static void cache_get_line_size(struct cacheinfo *this_leaf,
 		const char *propname;
 
 		propname = cache_type_info[ct_idx].line_size_props[i];
-		line_size = of_get_property(np, propname, NULL);
-		if (line_size)
+		line_size = of_property_read_u64(np, propname, &line_size);
+		if (line_size) {
+			this_leaf->coherency_line_size = line_size;
 			break;
+		}
 	}
 
-	if (line_size)
-		this_leaf->coherency_line_size = of_read_number(line_size, 1);
 }
 
 static void cache_nr_sets(struct cacheinfo *this_leaf, struct device_node *np)
 {
 	const char *propname;
-	const __be32 *nr_sets;
+	u64 nr_sets;
 	int ct_idx;
 
 	ct_idx = get_cacheinfo_idx(this_leaf->type);
 	propname = cache_type_info[ct_idx].nr_sets_prop;
 
-	nr_sets = of_get_property(np, propname, NULL);
-	if (nr_sets)
-		this_leaf->number_of_sets = of_read_number(nr_sets, 1);
+	if (!of_property_read_u64(np, propname, &nr_sets))
+		this_leaf->number_of_sets = nr_sets;
 }
 
 static void cache_associativity(struct cacheinfo *this_leaf)
-- 
2.7.4

  reply	other threads:[~2018-05-17 15:47 UTC|newest]

Thread overview: 56+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-05-11 23:57 [PATCH v9 00/12] Support PPTT for ARM64 Jeremy Linton
2018-05-11 23:57 ` [PATCH v9 01/12] drivers: base: cacheinfo: move cache_setup_of_node() Jeremy Linton
2018-05-11 23:57 ` [PATCH v9 02/12] drivers: base: cacheinfo: setup DT cache properties early Jeremy Linton
2018-05-15 17:15   ` Jeremy Linton
2018-05-15 19:32     ` Andy Shevchenko
2018-05-16 10:56       ` Sudeep Holla
2018-05-17 15:47         ` Sudeep Holla [this message]
2018-05-18 21:50           ` Andy Shevchenko
2018-05-21  9:27             ` Sudeep Holla
2018-05-21 10:15               ` Sudeep Holla
2018-05-21 10:32       ` [PATCH] drivers: base: cacheinfo: use OF property_read_u64 instead of get_property,read_number Sudeep Holla
2018-05-21 12:53         ` [PATCH v2] drivers: base: cacheinfo: use OF property_read_u32 " Sudeep Holla
2018-06-05 16:21           ` Andy Shevchenko
2018-06-05 16:26             ` Sudeep Holla
2018-06-05 16:34               ` Andy Shevchenko
2018-05-17  6:54     ` [PATCH v9 02/12] drivers: base: cacheinfo: setup DT cache properties early Greg KH
2018-05-17  9:08       ` Sudeep Holla
2018-05-17  9:35         ` Greg KH
2018-05-11 23:57 ` [PATCH v9 03/12] cacheinfo: rename of_node to fw_token Jeremy Linton
2018-05-11 23:57 ` [PATCH v9 04/12] arm64/acpi: Create arch specific cpu to acpi id helper Jeremy Linton
2018-05-14 14:41   ` Sudeep Holla
2018-05-11 23:58 ` [PATCH v9 05/12] ACPI/PPTT: Add Processor Properties Topology Table parsing Jeremy Linton
2018-05-12 10:09   ` Rafael J. Wysocki
2018-05-15 21:42     ` Jeremy Linton
2018-05-16  8:24       ` Rafael J. Wysocki
2018-05-11 23:58 ` [PATCH v9 06/12] ACPI: Enable PPTT support on ARM64 Jeremy Linton
2018-05-11 23:58 ` [PATCH v9 07/12] drivers: base cacheinfo: Add support for ACPI based firmware tables Jeremy Linton
2018-05-11 23:58 ` [PATCH v9 08/12] arm64: " Jeremy Linton
2018-05-11 23:58 ` [PATCH v9 09/12] arm64: topology: rename cluster_id Jeremy Linton
2018-05-11 23:58 ` [PATCH v9 10/12] arm64: topology: enable ACPI/PPTT based CPU topology Jeremy Linton
2018-05-11 23:58 ` [PATCH v9 11/12] ACPI: Add PPTT to injectable table list Jeremy Linton
2018-05-12 10:10   ` Rafael J. Wysocki
2018-05-11 23:58 ` [PATCH v9 12/12] arm64: topology: divorce MC scheduling domain from core_siblings Jeremy Linton
2018-05-17 17:05 ` [PATCH v9 00/12] Support PPTT for ARM64 Catalin Marinas
2018-05-29 10:48   ` Geert Uytterhoeven
2018-05-29 11:14     ` Sudeep Holla
2018-05-29 11:56       ` Geert Uytterhoeven
2018-05-29 13:18         ` Sudeep Holla
2018-05-29 15:08           ` Will Deacon
2018-05-29 15:51             ` Geert Uytterhoeven
2018-05-29 17:08               ` Robin Murphy
2018-05-29 17:18                 ` Geert Uytterhoeven
2018-05-29 17:31                 ` Sudeep Holla
2018-05-29 20:16               ` Will Deacon
2018-05-29 20:48                 ` Jeremy Linton
2018-05-29 21:52               ` Jeremy Linton
2018-05-30 13:24                 ` Sudeep Holla
2018-05-29 15:23           ` Jeremy Linton
2018-05-29 15:50           ` Geert Uytterhoeven
2018-05-30  8:52             ` Morten Rasmussen
2018-06-05 13:55     ` [PATCH 1/3] Revert "arm64: topology: divorce MC scheduling domain from core_siblings" Sudeep Holla
2018-06-05 13:55       ` [PATCH 2/3] ACPI / PPTT: fix build when CONFIG_ACPI_PPTT is not enabled Sudeep Holla
2018-06-05 13:55       ` [PATCH 3/3] arm64: disable ACPI PPTT support temporarily Sudeep Holla
2018-06-05 14:09       ` [PATCH 1/3] Revert "arm64: topology: divorce MC scheduling domain from core_siblings" Geert Uytterhoeven
2018-06-05 14:12         ` Sudeep Holla
2018-06-04 15:12   ` [PATCH v9 00/12] Support PPTT for ARM64 Catalin Marinas

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