linux-kernel - Re: [PATCH v2 3/7] clk: sunxi-ng: sun55i-a523-ccu: Add missing NPU module clock

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Message-ID: <2795929.mvXUDI8C0e@jernej-laptop>
Date: Thu, 11 Sep 2025 20:07:04 +0200
From: Jernej Škrabec <jernej.skrabec@...il.com>
To: Stephen Boyd <sboyd@...nel.org>, Chen-Yu Tsai <wens@...e.org>,
 Jernej Skrabec <jernej@...nel.org>, Samuel Holland <samuel@...lland.org>,
 Chen-Yu Tsai <wens@...nel.org>
Cc: Andre Przywara <andre.przywara@....com>, linux-sunxi@...ts.linux.dev,
 linux-clk@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject:
 Re: [PATCH v2 3/7] clk: sunxi-ng: sun55i-a523-ccu: Add missing NPU module
 clock

Dne četrtek, 11. september 2025 ob 19:47:06 Srednjeevropski poletni čas je Chen-Yu Tsai napisal(a):
> From: Chen-Yu Tsai <wens@...e.org>
> 
> The main clock controller on the A523/T527 has the NPU's module clock.
> It was missing from the original submission, likely because that was
> based on the A523 user manual; the A523 is marketed without the NPU.
> 
> Also, merge the private header back into the driver code itself. The
> header only contains a macro containing the total number of clocks.
> This has to be updated every time a missing clock gets added. Having
> it in a separate file doesn't help the process. Instead just drop the
> macro, and thus the header no longer has any reason to exist.
> 
> Also move the .num value to after the list of clks to make it obvious
> that it should be updated when new clks are added.
> 
> Signed-off-by: Chen-Yu Tsai <wens@...e.org>

Reviewed-by: Jernej Skrabec <jernej.skrabec@...il.com>

Best regards,
Jernej

> ---
> Changes since v1:
> - Move .num to after list of clks
> ---
>  drivers/clk/sunxi-ng/ccu-sun55i-a523.c | 21 ++++++++++++++++++---
>  drivers/clk/sunxi-ng/ccu-sun55i-a523.h | 14 --------------
>  2 files changed, 18 insertions(+), 17 deletions(-)
>  delete mode 100644 drivers/clk/sunxi-ng/ccu-sun55i-a523.h
> 
> diff --git a/drivers/clk/sunxi-ng/ccu-sun55i-a523.c b/drivers/clk/sunxi-ng/ccu-sun55i-a523.c
> index 1a9a1cb869e2..acb532f8361b 100644
> --- a/drivers/clk/sunxi-ng/ccu-sun55i-a523.c
> +++ b/drivers/clk/sunxi-ng/ccu-sun55i-a523.c
> @@ -11,6 +11,9 @@
>  #include <linux/module.h>
>  #include <linux/platform_device.h>
>  
> +#include <dt-bindings/clock/sun55i-a523-ccu.h>
> +#include <dt-bindings/reset/sun55i-a523-ccu.h>
> +
>  #include "../clk.h"
>  
>  #include "ccu_common.h"
> @@ -25,8 +28,6 @@
>  #include "ccu_nkmp.h"
>  #include "ccu_nm.h"
>  
> -#include "ccu-sun55i-a523.h"
> -
>  /*
>   * The 24 MHz oscillator, the root of most of the clock tree.
>   * .fw_name is the string used in the DT "clock-names" property, used to
> @@ -486,6 +487,18 @@ static SUNXI_CCU_M_HW_WITH_MUX_GATE(ve_clk, "ve", ve_parents, 0x690,
>  
>  static SUNXI_CCU_GATE_HWS(bus_ve_clk, "bus-ve", ahb_hws, 0x69c, BIT(0), 0);
>  
> +static const struct clk_hw *npu_parents[] = {
> +	&pll_periph0_480M_clk.common.hw,
> +	&pll_periph0_600M_clk.hw,
> +	&pll_periph0_800M_clk.common.hw,
> +	&pll_npu_2x_clk.hw,
> +};
> +static SUNXI_CCU_M_HW_WITH_MUX_GATE(npu_clk, "npu", npu_parents, 0x6e0,
> +				    0, 5,	/* M */
> +				    24, 3,	/* mux */
> +				    BIT(31),	/* gate */
> +				    CLK_SET_RATE_PARENT);
> +
>  static SUNXI_CCU_GATE_HWS(bus_dma_clk, "bus-dma", ahb_hws, 0x70c, BIT(0), 0);
>  
>  static SUNXI_CCU_GATE_HWS(bus_msgbox_clk, "bus-msgbox", ahb_hws, 0x71c,
> @@ -1217,6 +1230,7 @@ static struct ccu_common *sun55i_a523_ccu_clks[] = {
>  	&bus_ce_sys_clk.common,
>  	&ve_clk.common,
>  	&bus_ve_clk.common,
> +	&npu_clk.common,
>  	&bus_dma_clk.common,
>  	&bus_msgbox_clk.common,
>  	&bus_spinlock_clk.common,
> @@ -1343,7 +1357,6 @@ static struct ccu_common *sun55i_a523_ccu_clks[] = {
>  };
>  
>  static struct clk_hw_onecell_data sun55i_a523_hw_clks = {
> -	.num	= CLK_NUMBER,
>  	.hws	= {
>  		[CLK_PLL_DDR0]		= &pll_ddr_clk.common.hw,
>  		[CLK_PLL_PERIPH0_4X]	= &pll_periph0_4x_clk.common.hw,
> @@ -1524,7 +1537,9 @@ static struct clk_hw_onecell_data sun55i_a523_hw_clks = {
>  		[CLK_FANOUT0]		= &fanout0_clk.common.hw,
>  		[CLK_FANOUT1]		= &fanout1_clk.common.hw,
>  		[CLK_FANOUT2]		= &fanout2_clk.common.hw,
> +		[CLK_NPU]		= &npu_clk.common.hw,
>  	},
> +	.num	= CLK_NPU + 1,
>  };
>  
>  static struct ccu_reset_map sun55i_a523_ccu_resets[] = {
> diff --git a/drivers/clk/sunxi-ng/ccu-sun55i-a523.h b/drivers/clk/sunxi-ng/ccu-sun55i-a523.h
> deleted file mode 100644
> index fc8dd42f1b47..000000000000
> --- a/drivers/clk/sunxi-ng/ccu-sun55i-a523.h
> +++ /dev/null
> @@ -1,14 +0,0 @@
> -/* SPDX-License-Identifier: GPL-2.0 */
> -/*
> - * Copyright 2024 Arm Ltd.
> - */
> -
> -#ifndef _CCU_SUN55I_A523_H
> -#define _CCU_SUN55I_A523_H
> -
> -#include <dt-bindings/clock/sun55i-a523-ccu.h>
> -#include <dt-bindings/reset/sun55i-a523-ccu.h>
> -
> -#define CLK_NUMBER	(CLK_FANOUT2 + 1)
> -
> -#endif /* _CCU_SUN55I_A523_H */
>