From: Peng Fan <peng.fan@nxp.com>
To: "mturquette@baylibre.com" <mturquette@baylibre.com>,
"sboyd@kernel.org" <sboyd@kernel.org>,
"shawnguo@kernel.org" <shawnguo@kernel.org>,
"s.hauer@pengutronix.de" <s.hauer@pengutronix.de>,
"festevam@gmail.com" <festevam@gmail.com>,
Abel Vesa <abel.vesa@nxp.com>
Cc: Peng Fan <peng.fan@nxp.com>, Jacky Bai <ping.bai@nxp.com>,
Anson Huang <anson.huang@nxp.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
dl-linux-imx <linux-imx@nxp.com>,
"kernel@pengutronix.de" <kernel@pengutronix.de>,
Leonard Crestez <leonard.crestez@nxp.com>,
"linux-clk@vger.kernel.org" <linux-clk@vger.kernel.org>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>
Subject: [PATCH] clk: imx: imx8mq: fix sys2/3_pll_out_sels
Date: Thu, 24 Oct 2019 06:57:21 +0000 [thread overview]
Message-ID: <1571900044-22079-1-git-send-email-peng.fan@nxp.com> (raw)
From: Peng Fan <peng.fan@nxp.com>
The current clk tree shows:
osc_25m 9 11 0 25000000 0 0 50000
sys2_pll1_ref_sel 1 1 0 25000000 0 0 50000
sys3_pll_out 1 1 0 25000000 0 0 50000
sys1_pll1_ref_sel 2 2 0 25000000 0 0 50000
sys2_pll_out 6 6 0 1000000000 0 0 50000
It is not correct that sys3_pll_out use sys2_pll1_ref_sel as parent,
sys2_pll_out use sys1_pll1_ref_sel as parent.
According to the current imx_clk_sccg_pll design, it uses both
bypass1/2, however set bypass2 as 1 is not correct, because it will
make sys[x]_pll_out use wrong parent and might access wrong registers.
So correct bypass2 to 0 and fix sys2/3_pll_out_sels.
After fix, the tree shows:
osc_25m 10 12 0 25000000 0 0 50000
sys3_pll1_ref_sel 1 1 0 25000000 0 0 50000
sys3_pll_out 1 1 0 25000000 0 0 50000
sys2_pll1_ref_sel 1 1 0 25000000 0 0 50000
sys2_pll_out 6 6 0 1000000000 0 0 50000
sys1_pll1_ref_sel 1 1 0 25000000 0 0 50000
sys1_pll_out 5 5 0 800000000 0 0 50000
Fixes: e9dda4af685f ("clk: imx: Refactor entire sccg pll clk")
Signed-off-by: Peng Fan <peng.fan@nxp.com>
---
drivers/clk/imx/clk-imx8mq.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/drivers/clk/imx/clk-imx8mq.c b/drivers/clk/imx/clk-imx8mq.c
index 05ece7b5da54..e17f0ebfacb0 100644
--- a/drivers/clk/imx/clk-imx8mq.c
+++ b/drivers/clk/imx/clk-imx8mq.c
@@ -35,8 +35,8 @@ static const char * const audio_pll2_bypass_sels[] = {"audio_pll2", "audio_pll2_
static const char * const video_pll1_bypass_sels[] = {"video_pll1", "video_pll1_ref_sel", };
static const char * const sys1_pll_out_sels[] = {"sys1_pll1_ref_sel", };
-static const char * const sys2_pll_out_sels[] = {"sys1_pll1_ref_sel", "sys2_pll1_ref_sel", };
-static const char * const sys3_pll_out_sels[] = {"sys3_pll1_ref_sel", "sys2_pll1_ref_sel", };
+static const char * const sys2_pll_out_sels[] = {"sys2_pll1_ref_sel", };
+static const char * const sys3_pll_out_sels[] = {"sys3_pll1_ref_sel", };
static const char * const dram_pll_out_sels[] = {"dram_pll1_ref_sel", };
static const char * const video2_pll_out_sels[] = {"video2_pll1_ref_sel", };
@@ -345,8 +345,8 @@ static int imx8mq_clocks_probe(struct platform_device *pdev)
clks[IMX8MQ_VIDEO_PLL1_OUT] = imx_clk_gate("video_pll1_out", "video_pll1_bypass", base + 0x10, 21);
clks[IMX8MQ_SYS1_PLL_OUT] = imx_clk_sccg_pll("sys1_pll_out", sys1_pll_out_sels, ARRAY_SIZE(sys1_pll_out_sels), 0, 0, 0, base + 0x30, CLK_IS_CRITICAL);
- clks[IMX8MQ_SYS2_PLL_OUT] = imx_clk_sccg_pll("sys2_pll_out", sys2_pll_out_sels, ARRAY_SIZE(sys2_pll_out_sels), 0, 0, 1, base + 0x3c, CLK_IS_CRITICAL);
- clks[IMX8MQ_SYS3_PLL_OUT] = imx_clk_sccg_pll("sys3_pll_out", sys3_pll_out_sels, ARRAY_SIZE(sys3_pll_out_sels), 0, 0, 1, base + 0x48, CLK_IS_CRITICAL);
+ clks[IMX8MQ_SYS2_PLL_OUT] = imx_clk_sccg_pll("sys2_pll_out", sys2_pll_out_sels, ARRAY_SIZE(sys2_pll_out_sels), 0, 0, 0, base + 0x3c, CLK_IS_CRITICAL);
+ clks[IMX8MQ_SYS3_PLL_OUT] = imx_clk_sccg_pll("sys3_pll_out", sys3_pll_out_sels, ARRAY_SIZE(sys3_pll_out_sels), 0, 0, 0, base + 0x48, CLK_IS_CRITICAL);
clks[IMX8MQ_DRAM_PLL_OUT] = imx_clk_sccg_pll("dram_pll_out", dram_pll_out_sels, ARRAY_SIZE(dram_pll_out_sels), 0, 0, 0, base + 0x60, CLK_IS_CRITICAL);
clks[IMX8MQ_VIDEO2_PLL_OUT] = imx_clk_sccg_pll("video2_pll_out", video2_pll_out_sels, ARRAY_SIZE(video2_pll_out_sels), 0, 0, 0, base + 0x54, 0);
--
2.16.4
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next reply other threads:[~2019-10-24 6:57 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-24 6:57 Peng Fan [this message]
2019-10-28 8:53 ` [PATCH] clk: imx: imx8mq: fix sys2/3_pll_out_sels Shawn Guo
2019-10-28 8:55 ` Peng Fan
2019-10-30 9:33 ` Abel Vesa
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