public inbox for linux-riscv@lists.infradead.org
 help / color / mirror / Atom feed
From: Jesse Taube <mr.bossman075@gmail.com>
To: linux-riscv@lists.infradead.org
Cc: linux-kernel@vger.kernel.org,
	Jesse Taube <Mr.Bossman075@gmail.com>,
	Yimin Gu <ustcymgu@gmail.com>,
	Waldemar Brodkorb <wbx@openadk.org>,
	Albert Ou <aou@eecs.berkeley.edu>,
	Palmer Dabbelt <palmer@dabbelt.com>,
	Paul Walmsley <paul.walmsley@sifive.com>,
	Conor Dooley <conor.dooley@microchip.com>,
	kernel test robot <lkp@intel.com>
Subject: [PATCH v2 1/3] clk: k210: remove an implicit 64-bit division
Date: Sun, 12 Feb 2023 15:55:04 -0500	[thread overview]
Message-ID: <20230212205506.1992714-2-Mr.Bossman075@gmail.com> (raw)
In-Reply-To: <20230212205506.1992714-1-Mr.Bossman075@gmail.com>

From: Conor Dooley <conor.dooley@microchip.com>

The K210 clock driver depends on SOC_CANAAN, which is only selectable
when !MMU on RISC-V. !MMU is not possible on 32-bit yet, but patches
have been sent for its enabling. The kernel test robot reported this
implicit 64-bit division there.

Replace the implicit division with an explicit one.

Reported-by: kernel test robot <lkp@intel.com>
Link: https://lore.kernel.org/linux-riscv/202301201538.zNlqgE4L-lkp@intel.com/
Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Jesse Taube <Mr.Bossman075@gmail.com>
---
 drivers/clk/clk-k210.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/clk/clk-k210.c b/drivers/clk/clk-k210.c
index 67a7cb3503c3..4eed667eddaf 100644
--- a/drivers/clk/clk-k210.c
+++ b/drivers/clk/clk-k210.c
@@ -495,7 +495,7 @@ static unsigned long k210_pll_get_rate(struct clk_hw *hw,
 	f = FIELD_GET(K210_PLL_CLKF, reg) + 1;
 	od = FIELD_GET(K210_PLL_CLKOD, reg) + 1;
 
-	return (u64)parent_rate * f / (r * od);
+	return div_u64((u64)parent_rate * f, r * od);
 }
 
 static const struct clk_ops k210_pll_ops = {
-- 
2.39.0


_______________________________________________
linux-riscv mailing list
linux-riscv@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-riscv

  reply	other threads:[~2023-02-12 20:55 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-02-12 20:55 [PATCH v2 0/3] Add RISC-V 32 NOMMU support Jesse Taube
2023-02-12 20:55 ` Jesse Taube [this message]
2023-02-13 19:42   ` [PATCH v2 1/3] clk: k210: remove an implicit 64-bit division Conor Dooley
2023-02-12 20:55 ` [PATCH v2 2/3] riscv: Kconfig: Allow RV32 to build with no MMU Jesse Taube
2023-02-12 20:55 ` [PATCH v2 3/3] riscv: configs: Add nommu defconfig for RV32 Jesse Taube
2023-02-13 19:49   ` Conor Dooley
2023-02-13 21:44     ` Jesse Taube
2023-02-13 21:48       ` Conor Dooley

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20230212205506.1992714-2-Mr.Bossman075@gmail.com \
    --to=mr.bossman075@gmail.com \
    --cc=aou@eecs.berkeley.edu \
    --cc=conor.dooley@microchip.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-riscv@lists.infradead.org \
    --cc=lkp@intel.com \
    --cc=palmer@dabbelt.com \
    --cc=paul.walmsley@sifive.com \
    --cc=ustcymgu@gmail.com \
    --cc=wbx@openadk.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox