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Message-ID: <20241222170534.3621453-19-dario.binacchi@amarulasolutions.com>
Date: Sun, 22 Dec 2024 18:04:33 +0100
From: Dario Binacchi <dario.binacchi@...rulasolutions.com>
To: linux-kernel@...r.kernel.org
Cc: linux-amarula@...rulasolutions.com,
Dario Binacchi <dario.binacchi@...rulasolutions.com>,
Abel Vesa <abelvesa@...nel.org>,
Fabio Estevam <festevam@...il.com>,
Michael Turquette <mturquette@...libre.com>,
Peng Fan <peng.fan@....com>,
Pengutronix Kernel Team <kernel@...gutronix.de>,
Sascha Hauer <s.hauer@...gutronix.de>,
Shawn Guo <shawnguo@...nel.org>,
Stephen Boyd <sboyd@...nel.org>,
imx@...ts.linux.dev,
linux-arm-kernel@...ts.infradead.org,
linux-clk@...r.kernel.org
Subject: [PATCH v6 18/18] clk: imx8mn: support spread spectrum clock generation
Add support for spread spectrum clock generation for the audio, video,
and DRAM PLLs.
Signed-off-by: Dario Binacchi <dario.binacchi@...rulasolutions.com>
---
Changes in v6:
- Merge patches:
10/20 dt-bindings: clock: imx8mm: add binding definitions for anatop
11/20 dt-bindings: clock: imx8mn: add binding definitions for anatop
12/20 dt-bindings: clock: imx8mp: add binding definitions for anatop
to
05/20 dt-bindings: clock: imx8m-anatop: define clocks/clock-names
now renamed
05/18 dt-bindings: clock: imx8m-anatop: add oscillators and PLLs
- Split the patch
15/20 dt-bindings-clock-imx8m-clock-support-spread-spectru.patch
into
12/18 dt-bindings: clock: imx8m-clock: add PLLs
16/18 dt-bindings: clock: imx8m-clock: support spread spectrum clocking
Changes in v5:
- Fix compilation errors.
- Separate driver code from dt-bindings
Changes in v4:
- Add dt-bindings for anatop
- Add anatop driver
- Drop fsl,ssc-clocks from spread spectrum dt-bindings
Changes in v3:
- Patches 1/8 has been added in version 3. The dt-bindings have
been moved from fsl,imx8m-anatop.yaml to imx8m-clock.yaml. The
anatop device (fsl,imx8m-anatop.yaml) is indeed more or less a
syscon, so it represents a memory area accessible by ccm
(imx8m-clock.yaml) to setup the PLLs.
- Patches {3,5}/8 have been added in version 3.
- Patches {4,6,8}/8 use ccm device node instead of the anatop one.
Changes in v2:
- Add "allOf:" and place it after "required:" block, like in the
example schema.
- Move the properties definition to the top-level.
- Drop unit types as requested by the "make dt_binding_check" command.
drivers/clk/imx/clk-imx8mn.c | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/drivers/clk/imx/clk-imx8mn.c b/drivers/clk/imx/clk-imx8mn.c
index 588cebce6c9d..c61368e724f7 100644
--- a/drivers/clk/imx/clk-imx8mn.c
+++ b/drivers/clk/imx/clk-imx8mn.c
@@ -306,6 +306,7 @@ static int imx8mn_clocks_probe(struct platform_device *pdev)
struct device *dev = &pdev->dev;
struct device_node *np = dev->of_node;
void __iomem *base;
+ struct imx_pll14xx_ssc ssc_conf;
int ret;
base = devm_platform_ioremap_resource(pdev, 0);
@@ -338,9 +339,21 @@ static int imx8mn_clocks_probe(struct platform_device *pdev)
hws[IMX8MN_SYS_PLL3_REF_SEL] = imx8m_anatop_get_clk_hw(IMX8MN_ANATOP_SYS_PLL3_REF_SEL);
hws[IMX8MN_AUDIO_PLL1] = imx8m_anatop_get_clk_hw(IMX8MN_ANATOP_AUDIO_PLL1);
+ if (!imx_clk_pll14xx_ssc_parse_dt(np, "audio_pll1", &ssc_conf))
+ imx_clk_pll14xx_enable_ssc(hws[IMX8MN_AUDIO_PLL1], &ssc_conf);
+
hws[IMX8MN_AUDIO_PLL2] = imx8m_anatop_get_clk_hw(IMX8MN_ANATOP_AUDIO_PLL2);
+ if (!imx_clk_pll14xx_ssc_parse_dt(np, "audio_pll2", &ssc_conf))
+ imx_clk_pll14xx_enable_ssc(hws[IMX8MN_AUDIO_PLL2], &ssc_conf);
+
hws[IMX8MN_VIDEO_PLL] = imx8m_anatop_get_clk_hw(IMX8MN_ANATOP_VIDEO_PLL);
+ if (!imx_clk_pll14xx_ssc_parse_dt(np, "video_pll", &ssc_conf))
+ imx_clk_pll14xx_enable_ssc(hws[IMX8MN_VIDEO_PLL], &ssc_conf);
+
hws[IMX8MN_DRAM_PLL] = imx8m_anatop_get_clk_hw(IMX8MN_ANATOP_DRAM_PLL);
+ if (!imx_clk_pll14xx_ssc_parse_dt(np, "dram_pll", &ssc_conf))
+ imx_clk_pll14xx_enable_ssc(hws[IMX8MN_DRAM_PLL], &ssc_conf);
+
hws[IMX8MN_GPU_PLL] = imx8m_anatop_get_clk_hw(IMX8MN_ANATOP_GPU_PLL);
hws[IMX8MN_M7_ALT_PLL] = imx8m_anatop_get_clk_hw(IMX8MN_ANATOP_M7_ALT_PLL);
hws[IMX8MN_ARM_PLL] = imx8m_anatop_get_clk_hw(IMX8MN_ANATOP_ARM_PLL);
--
2.43.0
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