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clk: imx8mq: add PLL monitor output

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The PLL monitor is mentioned as a debug feature in the reference manual,
but there are some boards that use this clock output as a reference clock
for board level components. Add support for those clocks in the clock
driver, so this clock output can be used properly.

Note that the VIDEO1, GPU and VPU mux inputs are rotated compared to the
description in the reference manual. The order in this patch has been
empirically validated.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Reviewed-by: Abel Vesa <abel.vesa@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
This commit is contained in:
Lucas Stach 2021-01-25 18:41:33 +01:00 committed by Shawn Guo
parent 62a7c1c47a
commit 75a352bc66
2 changed files with 37 additions and 1 deletions
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22
drivers/clk/imx/clk-imx8mq.c
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@ -270,6 +270,14 @@ static const char * const imx8mq_clko1_sels[] = {"osc_25m", "sys1_pll_800m", "os
static const char * const imx8mq_clko2_sels[] = {"osc_25m", "sys2_pll_200m", "sys1_pll_400m", "sys2_pll_166m",
"sys3_pll_out", "audio_pll1_out", "video_pll1_out", "ckil", };
static const char * const pllout_monitor_sels[] = {"osc_25m", "osc_27m", "dummy", "dummy", "ckil",
"audio_pll1_out_monitor", "audio_pll2_out_monitor",
"video_pll1_out_monitor", "gpu_pll_out_monitor",
"vpu_pll_out_monitor", "arm_pll_out_monitor",
"sys_pll1_out_monitor", "sys_pll2_out_monitor",
"sys_pll3_out_monitor", "dram_pll_out_monitor",
"video_pll2_out_monitor", };
static struct clk_hw_onecell_data *clk_hw_data;
static struct clk_hw **hws;
@ -399,6 +407,20 @@ static int imx8mq_clocks_probe(struct platform_device *pdev)
hws[IMX8MQ_SYS2_PLL_500M] = imx_clk_hw_fixed_factor("sys2_pll_500m", "sys2_pll_500m_cg", 1, 2);
hws[IMX8MQ_SYS2_PLL_1000M] = imx_clk_hw_fixed_factor("sys2_pll_1000m", "sys2_pll_1000m_cg", 1, 1);
hws[IMX8MQ_CLK_MON_AUDIO_PLL1_DIV] = imx_clk_hw_divider("audio_pll1_out_monitor", "audio_pll1_bypass", base + 0x78, 0, 3);
hws[IMX8MQ_CLK_MON_AUDIO_PLL2_DIV] = imx_clk_hw_divider("audio_pll2_out_monitor", "audio_pll2_bypass", base + 0x78, 4, 3);
hws[IMX8MQ_CLK_MON_VIDEO_PLL1_DIV] = imx_clk_hw_divider("video_pll1_out_monitor", "video_pll1_bypass", base + 0x78, 8, 3);
hws[IMX8MQ_CLK_MON_GPU_PLL_DIV] = imx_clk_hw_divider("gpu_pll_out_monitor", "gpu_pll_bypass", base + 0x78, 12, 3);
hws[IMX8MQ_CLK_MON_VPU_PLL_DIV] = imx_clk_hw_divider("vpu_pll_out_monitor", "vpu_pll_bypass", base + 0x78, 16, 3);
hws[IMX8MQ_CLK_MON_ARM_PLL_DIV] = imx_clk_hw_divider("arm_pll_out_monitor", "arm_pll_bypass", base + 0x78, 20, 3);
hws[IMX8MQ_CLK_MON_SYS_PLL1_DIV] = imx_clk_hw_divider("sys_pll1_out_monitor", "sys1_pll_out", base + 0x7c, 0, 3);
hws[IMX8MQ_CLK_MON_SYS_PLL2_DIV] = imx_clk_hw_divider("sys_pll2_out_monitor", "sys2_pll_out", base + 0x7c, 4, 3);
hws[IMX8MQ_CLK_MON_SYS_PLL3_DIV] = imx_clk_hw_divider("sys_pll3_out_monitor", "sys3_pll_out", base + 0x7c, 8, 3);
hws[IMX8MQ_CLK_MON_DRAM_PLL_DIV] = imx_clk_hw_divider("dram_pll_out_monitor", "dram_pll_out", base + 0x7c, 12, 3);
hws[IMX8MQ_CLK_MON_VIDEO_PLL2_DIV] = imx_clk_hw_divider("video_pll2_out_monitor", "video2_pll_out", base + 0x7c, 16, 3);
hws[IMX8MQ_CLK_MON_SEL] = imx_clk_hw_mux("pllout_monitor_sel", base + 0x74, 0, 4, pllout_monitor_sels, ARRAY_SIZE(pllout_monitor_sels));
hws[IMX8MQ_CLK_MON_CLK2_OUT] = imx_clk_hw_gate("pllout_monitor_clk2", "pllout_monitor_sel", base + 0x74, 4);
np = dev->of_node;
base = devm_platform_ioremap_resource(pdev, 0);
if (WARN_ON(IS_ERR(base)))

16
include/dt-bindings/clock/imx8mq-clock.h
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@ -431,6 +431,20 @@
#define IMX8MQ_CLK_A53_CORE 289
#define IMX8MQ_CLK_END 290
#define IMX8MQ_CLK_MON_AUDIO_PLL1_DIV 290
#define IMX8MQ_CLK_MON_AUDIO_PLL2_DIV 291
#define IMX8MQ_CLK_MON_VIDEO_PLL1_DIV 292
#define IMX8MQ_CLK_MON_GPU_PLL_DIV 293
#define IMX8MQ_CLK_MON_VPU_PLL_DIV 294
#define IMX8MQ_CLK_MON_ARM_PLL_DIV 295
#define IMX8MQ_CLK_MON_SYS_PLL1_DIV 296
#define IMX8MQ_CLK_MON_SYS_PLL2_DIV 297
#define IMX8MQ_CLK_MON_SYS_PLL3_DIV 298
#define IMX8MQ_CLK_MON_DRAM_PLL_DIV 299
#define IMX8MQ_CLK_MON_VIDEO_PLL2_DIV 300
#define IMX8MQ_CLK_MON_SEL 301
#define IMX8MQ_CLK_MON_CLK2_OUT 302
#define IMX8MQ_CLK_END 303
#endif /* __DT_BINDINGS_CLOCK_IMX8MQ_H */