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[73.183.52.120]) by smtp.gmail.com with ESMTPSA id 6a1803df08f44-8997c8a771fsm53701036d6.17.2026.02.22.15.51.21 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 22 Feb 2026 15:51:22 -0800 (PST) From: Brian Masney Date: Sun, 22 Feb 2026 18:51:04 -0500 Subject: [PATCH 1/3] clk: microchip: core: update to use div64_ul() instead of do_div() Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20260222-clk-microchip-pic32-v1-1-ceacbcd515d1@redhat.com> References: <20260222-clk-microchip-pic32-v1-0-ceacbcd515d1@redhat.com> In-Reply-To: <20260222-clk-microchip-pic32-v1-0-ceacbcd515d1@redhat.com> To: Conor Dooley , Claudiu Beznea , Michael Turquette , Stephen Boyd Cc: linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org, Brian Masney , kernel test robot X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=1185; i=bmasney@redhat.com; s=20250903; h=from:subject:message-id; bh=CJrk612FhmjDj3VPD/9bUWPYLrlPaYeOFopd1zExvM4=; b=owGbwMvMwCW2/dJd9di6A+2Mp9WSGDJnTytN9V5zKl910yfBFZmvtdX/h361Nk3bFXBO//PU3 uX6P6NPdZSyMIhxMciKKbIsyTUqiEhdZXvvjiYLzBxWJpAhDFycAjARluWMDFOFTQwCRP5ICthv zlxqzmC8syUoaAmfjqU9S8XbsyJxPxkZLn7mLffdaHMrSu6shduyJ5Nzbr06bKNU2Sdxc9uxBqM 2NgA= X-Developer-Key: i=bmasney@redhat.com; a=openpgp; fpr=A46D32705865AA3DDEDC2904B7D2DD275D7EC087 This driver is currently only compiled on 32-bit MIPS systems. When compiling on 64-bit systems, the build fails with: WARNING: do_div() does a 64-by-32 division, please consider using div64_ul instead. Let's update this to use div64_ul() in preparation for allowing this driver to be compiled on all architectures. Reported-by: kernel test robot Closes: https://lore.kernel.org/oe-kbuild-all/202601160758.bpkN4546-lkp@int= el.com/ Signed-off-by: Brian Masney --- drivers/clk/microchip/clk-core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/clk/microchip/clk-core.c b/drivers/clk/microchip/clk-c= ore.c index 692152b5094e00bf5acb19a67cf41e6c86b11f35..2e86ad846a66cd5487f5412c09a= b0ad25ebe3f79 100644 --- a/drivers/clk/microchip/clk-core.c +++ b/drivers/clk/microchip/clk-core.c @@ -341,7 +341,7 @@ static void roclk_calc_div_trim(unsigned long rate, div =3D parent_rate / (rate << 1); frac =3D parent_rate; frac <<=3D 8; - do_div(frac, rate); + frac =3D div64_ul(frac, rate); frac -=3D (u64)(div << 9); =20 rodiv =3D (div > REFO_DIV_MASK) ? 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[73.183.52.120]) by smtp.gmail.com with ESMTPSA id 6a1803df08f44-8997c8a771fsm53701036d6.17.2026.02.22.15.51.23 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 22 Feb 2026 15:51:25 -0800 (PST) From: Brian Masney Date: Sun, 22 Feb 2026 18:51:05 -0500 Subject: [PATCH 2/3] clk: microchip: core: change asm nop calls to nop() Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20260222-clk-microchip-pic32-v1-2-ceacbcd515d1@redhat.com> References: <20260222-clk-microchip-pic32-v1-0-ceacbcd515d1@redhat.com> In-Reply-To: <20260222-clk-microchip-pic32-v1-0-ceacbcd515d1@redhat.com> To: Conor Dooley , Claudiu Beznea , Michael Turquette , Stephen Boyd Cc: linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org, Brian Masney X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=1318; i=bmasney@redhat.com; s=20250903; h=from:subject:message-id; bh=CcOilrt5K4K/T1jJzE29QaA49JBm79z4ATT14FiguCo=; b=owGbwMvMwCW2/dJd9di6A+2Mp9WSGDJnTyvzawjMU+o+I8Iy142d4d0yvmc/8/XdouZNfK7xc 8nxnVeOdpSyMIhxMciKKbIsyTUqiEhdZXvvjiYLzBxWJpAhDFycAjCRsjkMf4X5eTctsp1WO2lt lsJiN7XOHYnHDl4oWTLzhN7mxO1ZSTMY/rtkL71533qS0xexIkuVP4cn/RTbdCfZNbdUrEfqYuD Rc6wA X-Developer-Key: i=bmasney@redhat.com; a=openpgp; fpr=A46D32705865AA3DDEDC2904B7D2DD275D7EC087 In preparation for allowing this driver to be compiled on all architectures, convert the direct asm nop calls to use the nop() function that's available. Signed-off-by: Brian Masney --- drivers/clk/microchip/clk-core.c | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) diff --git a/drivers/clk/microchip/clk-core.c b/drivers/clk/microchip/clk-c= ore.c index 2e86ad846a66cd5487f5412c09ab0ad25ebe3f79..4e90988f47d5d3a370bd1a8e74c= 5778e4f071038 100644 --- a/drivers/clk/microchip/clk-core.c +++ b/drivers/clk/microchip/clk-core.c @@ -3,6 +3,7 @@ * Purna Chandra Mandal, * Copyright (C) 2015 Microchip Technology Inc. All rights reserved. */ +#include #include #include #include @@ -77,11 +78,11 @@ static struct clk_hw *pic32_sclk_hw; /* add instruction pipeline delay while CPU clock is in-transition. */ #define cpu_nop5() \ do { \ - __asm__ __volatile__("nop"); \ - __asm__ __volatile__("nop"); \ - __asm__ __volatile__("nop"); \ - __asm__ __volatile__("nop"); \ - __asm__ __volatile__("nop"); \ + nop(); \ + nop(); \ + nop(); \ + nop(); \ + nop(); \ } while (0) =20 /* Perpheral bus clocks */ --=20 2.53.0 From nobody Fri Apr 17 07:45:45 2026 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 182213612D3 for ; Sun, 22 Feb 2026 23:51:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.129.124 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; 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[73.183.52.120]) by smtp.gmail.com with ESMTPSA id 6a1803df08f44-8997c8a771fsm53701036d6.17.2026.02.22.15.51.25 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 22 Feb 2026 15:51:26 -0800 (PST) From: Brian Masney Date: Sun, 22 Feb 2026 18:51:06 -0500 Subject: [PATCH 3/3] clk: microchip: core: allow driver to be compiled with COMPILE_TEST Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20260222-clk-microchip-pic32-v1-3-ceacbcd515d1@redhat.com> References: <20260222-clk-microchip-pic32-v1-0-ceacbcd515d1@redhat.com> In-Reply-To: <20260222-clk-microchip-pic32-v1-0-ceacbcd515d1@redhat.com> To: Conor Dooley , Claudiu Beznea , Michael Turquette , Stephen Boyd Cc: linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org, Brian Masney X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=849; i=bmasney@redhat.com; s=20250903; h=from:subject:message-id; bh=Vaz/v5iK5xCxuwXrVAC77q7tpyqLodfB6MfmVz11O5g=; b=owGbwMvMwCW2/dJd9di6A+2Mp9WSGDJnTyv3rmrYaLPm5DxXtacbHnYt/ZAza4eQqeKZluNT/ r4qZNjyvqOUhUGMi0FWTJFlSa5RQUTqKtt7dzRZYOawMoEMYeDiFICJPEpn+M1+br3yEW/HdTN0 ahue7kmZuaX5zcc/Jy9pnWze8trDkCWL4b/Dqv5LfQEfuGKFTosruhb03XGskWKY2GDymvlDaeO ZDFYA X-Developer-Key: i=bmasney@redhat.com; a=openpgp; fpr=A46D32705865AA3DDEDC2904B7D2DD275D7EC087 This driver currently only supports builds against a PIC32 target. To avoid future breakage in the future, let's update the Kconfig and the driver so that it can be built with COMPILE_TEST enabled. Signed-off-by: Brian Masney --- drivers/clk/microchip/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/clk/microchip/Kconfig b/drivers/clk/microchip/Kconfig index 0c03b14699bf083361bb5be8be3cf5305c311549..2864250dcaf8e720695c5a884a5= aaf2efde15a1a 100644 --- a/drivers/clk/microchip/Kconfig +++ b/drivers/clk/microchip/Kconfig @@ -1,7 +1,7 @@ # SPDX-License-Identifier: GPL-2.0 =20 config COMMON_CLK_PIC32 - def_bool COMMON_CLK && MACH_PIC32 + def_bool COMMON_CLK && (MACH_PIC32 || COMPILE_TEST) =20 config MCHP_CLK_MPFS bool "Clk driver for PolarFire SoC" --=20 2.53.0