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* [PATCH] clk: imx: imx8mq: fix sys2/3_pll_out_sels
@ 2019-10-24  6:57 Peng Fan
  2019-10-28  8:53 ` Shawn Guo
  0 siblings, 1 reply; 4+ messages in thread
From: Peng Fan @ 2019-10-24  6:57 UTC (permalink / raw)
  To: mturquette, sboyd, shawnguo, s.hauer, festevam, Abel Vesa
  Cc: kernel, dl-linux-imx, Anson Huang, Jacky Bai, linux-clk,
	linux-arm-kernel, linux-kernel, Leonard Crestez, Peng Fan

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


^ permalink raw reply related	[flat|nested] 4+ messages in thread

end of thread, other threads:[~2019-10-30  9:33 UTC | newest]

Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-10-24  6:57 [PATCH] clk: imx: imx8mq: fix sys2/3_pll_out_sels Peng Fan
2019-10-28  8:53 ` Shawn Guo
2019-10-28  8:55   ` Peng Fan
2019-10-30  9:33   ` Abel Vesa

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