linux-kernel - Re: [PATCH RESEND 4/7] clk: spacemit: define existing syscon resets

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Message-ID: <20250322162909-GYA15267@gentoo>
Date: Sat, 22 Mar 2025 16:29:09 +0000
From: Yixun Lan <dlan@...too.org>
To: Alex Elder <elder@...cstar.com>
Cc: p.zabel@...gutronix.de, mturquette@...libre.com, sboyd@...nel.org,
	robh@...nel.org, krzk+dt@...nel.org, conor+dt@...nel.org,
	heylenay@....org, guodong@...cstar.com, paul.walmsley@...ive.com,
	palmer@...belt.com, aou@...s.berkeley.edu, spacemit@...ts.linux.dev,
	devicetree@...r.kernel.org, linux-clk@...r.kernel.org,
	linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH RESEND 4/7] clk: spacemit: define existing syscon resets

On 10:18 Fri 21 Mar     , Alex Elder wrote:
> Define reset controls associated with the MPMU, APBC, and APMU
> SpacemiT K1 CCUs.  These already have clocks associated with them.
> 
> Signed-off-by: Alex Elder <elder@...cstar.com>
> ---
>  drivers/clk/spacemit/ccu-k1.c | 132 ++++++++++++++++++++++++++++++++++
>  1 file changed, 132 insertions(+)
> 
> diff --git a/drivers/clk/spacemit/ccu-k1.c b/drivers/clk/spacemit/ccu-k1.c
> index 6d879411c6c05..be8abd27753cb 100644
> --- a/drivers/clk/spacemit/ccu-k1.c
> +++ b/drivers/clk/spacemit/ccu-k1.c
..  
> +static const struct ccu_reset_data apmu_reset_data[] = {
> +	[RST_CCIC_4X]	= RST_DATA(APMU_CCIC_CLK_RES_CTRL,	0, BIT(1)),
> +	[RST_CCIC1_PHY] = RST_DATA(APMU_CCIC_CLK_RES_CTRL,	0, BIT(2)),
> +	[RST_SDH_AXI]	= RST_DATA(APMU_SDH0_CLK_RES_CTRL,	0, BIT(0)),
> +	[RST_SDH0]	= RST_DATA(APMU_SDH0_CLK_RES_CTRL,	0, BIT(1)),
> +	[RST_SDH1]	= RST_DATA(APMU_SDH1_CLK_RES_CTRL,	0, BIT(1)),
> +	[RST_SDH2]	= RST_DATA(APMU_SDH2_CLK_RES_CTRL,	0, BIT(1)),
> +	[RST_USBP1_AXI] = RST_DATA(APMU_USB_CLK_RES_CTRL,	0, BIT(4)),
> +	[RST_USB_AXI]	= RST_DATA(APMU_USB_CLK_RES_CTRL,	0, BIT(0)),
..
> +	[RST_USB3_0]	= RST_DATA(APMU_USB_CLK_RES_CTRL,	0, 
> +				      BIT(9)|BIT(10)|BIT(11)),
100 column if possible, also add one space between "BIT(9) | BIT(10) .."
continuous bits can just use GENMASK for short?
but may result slightly unreadable, anyway, either way is fine by me

> +	[RST_QSPI]	= RST_DATA(APMU_QSPI_CLK_RES_CTRL,	0, BIT(1)),
> +	[RST_QSPI_BUS] = RST_DATA(APMU_QSPI_CLK_RES_CTRL,	0, BIT(0)),
> +	[RST_DMA]	= RST_DATA(APMU_DMA_CLK_RES_CTRL,	0, BIT(0)),
> +	[RST_AES]	= RST_DATA(APMU_AES_CLK_RES_CTRL,	0, BIT(4)),
> +	[RST_VPU]	= RST_DATA(APMU_VPU_CLK_RES_CTRL,	0, BIT(0)),
> +	[RST_GPU]	= RST_DATA(APMU_GPU_CLK_RES_CTRL,	0, BIT(1)),
> +	[RST_EMMC]	= RST_DATA(APMU_PMUA_EM_CLK_RES_CTRL,	0, BIT(1)),
> +	[RST_EMMC_X]	= RST_DATA(APMU_PMUA_EM_CLK_RES_CTRL,	0, BIT(0)),
> +	[RST_AUDIO]	= RST_DATA(APMU_AUDIO_CLK_RES_CTRL,	0,
> +				   BIT(0) | BIT(2) | BIT(3)),
> +	[RST_HDMI]	= RST_DATA(APMU_HDMI_CLK_RES_CTRL,	0, BIT(9)),
> +	[RST_PCIE0]	= RST_DATA(APMU_PCIE_CLK_RES_CTRL_0,	BIT(8),
> +				   BIT(3) | BIT(4) | BIT(5)),
> +	[RST_PCIE1]	= RST_DATA(APMU_PCIE_CLK_RES_CTRL_1,	BIT(8),
> +				   BIT(3) | BIT(4) | BIT(5)),
> +	[RST_PCIE2]	= RST_DATA(APMU_PCIE_CLK_RES_CTRL_2,	BIT(8),
> +				   BIT(3) | BIT(4) | BIT(5)),
> +	[RST_EMAC0]	= RST_DATA(APMU_EMAC0_CLK_RES_CTRL,	0, BIT(1)),
> +	[RST_EMAC1]	= RST_DATA(APMU_EMAC1_CLK_RES_CTRL,	0, BIT(1)),
> +	[RST_JPG]	= RST_DATA(APMU_JPG_CLK_RES_CTRL,	0, BIT(0)),
> +	[RST_CCIC2PHY]	= RST_DATA(APMU_CSI_CCIC2_CLK_RES_CTRL,	0, BIT(2)),
> +	[RST_CCIC3PHY]	= RST_DATA(APMU_CSI_CCIC2_CLK_RES_CTRL,	0, BIT(29)),
> +	[RST_CSI]	= RST_DATA(APMU_CSI_CCIC2_CLK_RES_CTRL,	0, BIT(1)),
> +	[RST_ISP]	= RST_DATA(APMU_ISP_CLK_RES_CTRL,	0, BIT(0)),
> +	[RST_ISP_CPP]	= RST_DATA(APMU_ISP_CLK_RES_CTRL,	0, BIT(27)),
> +	[RST_ISP_BUS]	= RST_DATA(APMU_ISP_CLK_RES_CTRL,	0, BIT(3)),
> +	[RST_ISP_CI]	= RST_DATA(APMU_ISP_CLK_RES_CTRL,	0, BIT(16)),
> +	[RST_DPU_MCLK]	= RST_DATA(APMU_LCD_CLK_RES_CTRL2,	0, BIT(9)),
> +	[RST_DPU_ESC]	= RST_DATA(APMU_LCD_CLK_RES_CTRL1,	0, BIT(3)),
> +	[RST_DPU_HCLK]	= RST_DATA(APMU_LCD_CLK_RES_CTRL1,	0, BIT(4)),
> +	[RST_DPU_SPIBUS] = RST_DATA(APMU_LCD_SPI_CLK_RES_CTRL,	0, BIT(4)),
> +	[RST_DPU_SPI_HBUS] = RST_DATA(APMU_LCD_SPI_CLK_RES_CTRL, 0, BIT(2)),
> +	[RST_V2D]	= RST_DATA(APMU_LCD_CLK_RES_CTRL1,	0, BIT(27)),
> +	[RST_MIPI]	= RST_DATA(APMU_LCD_CLK_RES_CTRL1,	0, BIT(15)),
> +	[RST_MC]	= RST_DATA(APMU_PMUA_MC_CTRL,		0, BIT(0)),
> +};
> +
> +static const struct ccu_reset_controller_data apmu_reset_controller_data = {
> +	.count		= ARRAY_SIZE(apmu_reset_data),
> +	.data		= apmu_reset_data,
> +};
> +
>  static const struct k1_ccu_data k1_ccu_apmu_data = {
>  	.clk		= k1_ccu_apmu_clks,
> +	.rst_data	= &apmu_reset_controller_data,
>  };
>  
>  static struct ccu_reset_controller *
> -- 
> 2.43.0
> 

-- 
Yixun Lan (dlan)
Gentoo Linux Developer
GPG Key ID AABEFD55