linux-kernel - Re: [PATCH 4/5] clk: imx95-blk-ctl: Add clock for i.MX94 LVDS/Display CSR

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Message-ID: <20250701145743.GC20538@nxa18884-linux>
Date: Tue, 1 Jul 2025 22:57:43 +0800
From: Peng Fan <peng.fan@....nxp.com>
To: Alexander Stein <alexander.stein@...tq-group.com>
Cc: Michael Turquette <mturquette@...libre.com>,
	Stephen Boyd <sboyd@...nel.org>, Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>, Shawn Guo <shawnguo@...nel.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Pengutronix Kernel Team <kernel@...gutronix.de>,
	Fabio Estevam <festevam@...il.com>, Abel Vesa <abelvesa@...nel.org>,
	Frank Li <frank.li@....com>, Peng Fan <peng.fan@....com>,
	linux-clk@...r.kernel.org, devicetree@...r.kernel.org,
	imx@...ts.linux.dev, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org, Abel Vesa <abel.vesa@...aro.org>
Subject: Re: [PATCH 4/5] clk: imx95-blk-ctl: Add clock for i.MX94
 LVDS/Display CSR

On Tue, Jul 01, 2025 at 11:29:34AM +0200, Alexander Stein wrote:
>Hi,
>
>thanks for the patch.
>
>Am Dienstag, 1. Juli 2025, 09:04:40 CEST schrieb Peng Fan:
>> i.MX94 BLK CTL LVDS CSR's LVDS_PHY_CLOCK_CONTRL register controls the clock
>> gating logic of LVDS units. Display CSR's DISPLAY_ENGINES_CLOCK_CONTROL
>> register controls the selection of the clock feeding the display engine.
>> 
>> Add clock gate support for the two CSRs.
>> 
>> Signed-off-by: Peng Fan <peng.fan@....com>
>> ---
>>  drivers/clk/imx/clk-imx95-blk-ctl.c | 50 ++++++++++++++++++++++++++++++++++++-
>>  1 file changed, 49 insertions(+), 1 deletion(-)
>> 
>> diff --git a/drivers/clk/imx/clk-imx95-blk-ctl.c b/drivers/clk/imx/clk-imx95-blk-ctl.c
>> index 828ee0a81ff62c6e4f61eef350b9073f19f5351f..5fe582b0d4a9a197f2c1a49dc18f15ca83ccb4a4 100644
>> --- a/drivers/clk/imx/clk-imx95-blk-ctl.c
>> +++ b/drivers/clk/imx/clk-imx95-blk-ctl.c
>> @@ -1,8 +1,9 @@
>>  // SPDX-License-Identifier: GPL-2.0
>>  /*
>> - * Copyright 2024 NXP
>> + * Copyright 2024-2025 NXP
>>   */
>>  
>> +#include <dt-bindings/clock/nxp,imx94-clock.h>
>>  #include <dt-bindings/clock/nxp,imx95-clock.h>
>>  #include <linux/clk.h>
>>  #include <linux/clk-provider.h>
>> @@ -300,6 +301,51 @@ static const struct imx95_blk_ctl_dev_data hsio_blk_ctl_dev_data = {
>>  	.clk_reg_offset = 0,
>>  };
>>  
>> +static const struct imx95_blk_ctl_clk_dev_data imx94_lvds_clk_dev_data[] = {
>> +	[IMX94_CLK_DISPMIX_LVDS_CLK_GATE] = {
>> +		.name = "lvds_clk_gate",
>> +		.parent_names = (const char *[]){ "ldbpll", },
>> +		.num_parents = 1,
>> +		.reg = 0,
>> +		.bit_idx = 1,
>> +		.bit_width = 1,
>> +		.type = CLK_GATE,
>> +		.flags = CLK_SET_RATE_PARENT,
>> +		.flags2 = CLK_GATE_SET_TO_DISABLE,
>> +	},
>> +};
>> +
>> +static const struct imx95_blk_ctl_dev_data imx94_lvds_csr_dev_data = {
>> +	.num_clks = ARRAY_SIZE(imx94_lvds_clk_dev_data),
>> +	.clk_dev_data = imx94_lvds_clk_dev_data,
>> +	.clk_reg_offset = 0,
>> +	.rpm_enabled = true,
>> +};
>> +
>> +static const char * const imx94_disp_engine_parents[] = {
>> +	"disppix", "ldb_pll_div7"
>> +};
>> +
>> +static const struct imx95_blk_ctl_clk_dev_data imx94_dispmix_csr_clk_dev_data[] = {
>> +	[IMX94_CLK_DISPMIX_CLK_SEL] = {
>> +		.name = "disp_clk_sel",
>> +		.parent_names = imx94_disp_engine_parents,
>> +		.num_parents = ARRAY_SIZE(imx94_disp_engine_parents),
>> +		.reg = 0,
>> +		.bit_idx = 1,
>> +		.bit_width = 1,
>> +		.type = CLK_MUX,
>> +		.flags = CLK_SET_RATE_NO_REPARENT | CLK_SET_RATE_PARENT,
>> +	},
>> +};
>> +
>> +static const struct imx95_blk_ctl_dev_data imx94_dispmix_csr_dev_data = {
>> +	.num_clks = ARRAY_SIZE(imx94_dispmix_csr_clk_dev_data),
>> +	.clk_dev_data = imx94_dispmix_csr_clk_dev_data,
>> +	.clk_reg_offset = 0,
>> +	.rpm_enabled = true,
>> +};
>> +
>>  static int imx95_bc_probe(struct platform_device *pdev)
>>  {
>>  	struct device *dev = &pdev->dev;
>> @@ -474,6 +520,8 @@ static const struct of_device_id imx95_bc_of_match[] = {
>>  	{ .compatible = "nxp,imx95-hsio-blk-ctl", .data = &hsio_blk_ctl_dev_data },
>>  	{ .compatible = "nxp,imx95-vpu-csr", .data = &vpublk_dev_data },
>>  	{ .compatible = "nxp,imx95-netcmix-blk-ctrl", .data = &netcmix_dev_data},
>> +	{ .compatible = "nxp,imx94-lvds-csr", .data = &imx94_lvds_csr_dev_data },
>> +	{ .compatible = "nxp,imx94-display-csr", .data = &imx94_dispmix_csr_dev_data },
>
>Similar to patch 1, sort them properly.

ok, I will move imx94 to top. While at here, I will also sort
the imx95 following alphabet order.

Thanks,
Peng

>
>Best regards,
>Alexander
>
>>  	{ /* Sentinel */ },
>>  };
>>  MODULE_DEVICE_TABLE(of, imx95_bc_of_match);
>> 
>> 
>
>
>-- 
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