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From: Jonas Karlman <jonas@kwiboo.se>
To: Quentin Schulz <u-boot@0leil.net>,
	Kever Yang <kever.yang@rock-chips.com>,
	Tom Rini <trini@konsulko.com>,
	Ilias Apalodimas <ilias.apalodimas@linaro.org>,
	Lukasz Majewski <lukma@denx.de>, Simon Glass <sjg@chromium.org>
Cc: u-boot@lists.u-boot-project.org, Jonas Karlman <jonas@kwiboo.se>
Subject: [PATCH 08/15] clk: rockchip: rk3588: Fix possible divide by zero
Date: Thu, 30 Jul 2026 14:12:57 +0000	[thread overview]
Message-ID: <20260730141308.1218014-9-jonas@kwiboo.se> (raw)
In-Reply-To: <20260730141308.1218014-1-jonas@kwiboo.se>

The best rate handling of rk3588_dclk_vop_set_clk() may unintentionally
trigger a divide by zero when V0PLL is tested as parent. Instead, fully
skip rate calculation when testing using V0PLL as parent to avoid a
divide by zero error.

Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
---
 drivers/clk/rockchip/clk_rk3588.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/clk/rockchip/clk_rk3588.c b/drivers/clk/rockchip/clk_rk3588.c
index 157a02e011a5..d03ca9c4ac8d 100644
--- a/drivers/clk/rockchip/clk_rk3588.c
+++ b/drivers/clk/rockchip/clk_rk3588.c
@@ -1165,8 +1165,8 @@ static ulong rk3588_dclk_vop_set_clk(struct rk3588_clk_priv *priv,
 				pll_rate = priv->aupll_hz;
 				break;
 			case DCLK_VOP_SRC_SEL_V0PLL:
-				pll_rate = 0;
-				break;
+				/* Skip V0PLL as parent for best_rate mode */
+				continue;
 			default:
 				printf("do not support this vop pll sel\n");
 				return -EINVAL;
-- 
2.54.0


  parent reply	other threads:[~2026-07-30 14:13 UTC|newest]

Thread overview: 33+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-07-30 14:12 [PATCH 00/15] rockchip: Miscellaneous RK35xx clock fixes Jonas Karlman
2026-07-30 14:12 ` [PATCH 01/15] clk: rockchip: pll: Fix double use of postdiv1 Jonas Karlman
2026-08-07  9:36   ` Quentin Schulz via U-Boot
2026-08-07 10:38     ` Jonas Karlman
2026-08-07 16:38       ` Quentin Schulz via U-Boot
2026-08-07 13:19   ` Quentin Schulz
2026-07-30 14:12 ` [PATCH 02/15] clk: rockchip: pll: Always write the dsmpd flag Jonas Karlman
2026-08-07 13:24   ` Quentin Schulz
2026-07-30 14:12 ` [PATCH 03/15] clk: rockchip: pll: Always write the k param Jonas Karlman
2026-08-07 13:29   ` Quentin Schulz
2026-07-30 14:12 ` [PATCH 04/15] clk: rockchip: pll: Use PLL_FIXED_MODE flag on rk3588/rk3576 plls Jonas Karlman
2026-08-07 14:09   ` Quentin Schulz
2026-07-30 14:12 ` [PATCH 05/15] clk: rockchip: pll: Limit special rk3588_pll handling to RK3588 Jonas Karlman
2026-08-07 14:30   ` Quentin Schulz
2026-07-30 14:12 ` [PATCH 06/15] clk: rockchip: rk3568: Fix trivial clock configuration errors Jonas Karlman
2026-08-07 14:46   ` Quentin Schulz
2026-07-30 14:12 ` Jonas Karlman [this message]
2026-08-07 15:20   ` [PATCH 08/15] clk: rockchip: rk3588: Fix possible divide by zero Quentin Schulz
2026-07-30 14:12 ` [PATCH 09/15] clk: rockchip: rk3588: Fix ACLK_BUS_ROOT rate set during probe Jonas Karlman
2026-08-07 15:44   ` Quentin Schulz
2026-07-30 14:13 ` [PATCH 12/15] clk: rockchip: rk3528: Fix trivial clock configuration errors Jonas Karlman
2026-08-07 16:07   ` Quentin Schulz
2026-07-30 14:13 ` [PATCH 13/15] clk: rockchip: rk3506: " Jonas Karlman
2026-08-07 16:08   ` Quentin Schulz
2026-07-30 14:13 ` [PATCH 14/15] clk: rockchip: rk3568: Drop unused GRF syscon lookup Jonas Karlman
2026-08-07 16:16   ` Quentin Schulz
2026-07-30 14:13 ` [PATCH 15/15] clk: rockchip: rk3588: " Jonas Karlman
2026-08-07 16:19   ` Quentin Schulz
     [not found] ` <20260730141308.1218014-8-jonas@kwiboo.se>
2026-08-07 15:07   ` [PATCH 07/15] clk: rockchip: rk3588: Fix trivial clock configuration errors Quentin Schulz
     [not found] ` <20260730141308.1218014-11-jonas@kwiboo.se>
2026-08-07 15:46   ` [PATCH 10/15] clk: rockchip: rk3588: Use SPLL_HZ constant Quentin Schulz
     [not found] ` <20260730141308.1218014-12-jonas@kwiboo.se>
2026-08-07 16:04   ` [PATCH 11/15] clk: rockchip: rk3576: Fix trivial clock configuration errors Quentin Schulz via U-Boot
2026-08-08 13:37 ` [PATCH 00/15] rockchip: Miscellaneous RK35xx clock fixes Simon Glass
2026-09-08 11:25 ` Heiko Stübner

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