linux-kernel - Re: [PATCH 2/8] dma: mmp_pdma: Add optional clock support

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <aFEEhik8x2k5_myN@vaman>
Date: Tue, 17 Jun 2025 11:30:38 +0530
From: Vinod Koul <vkoul@...nel.org>
To: Guodong Xu <guodong@...cstar.com>
Cc: robh@...nel.org, krzk+dt@...nel.org, conor+dt@...nel.org,
	dlan@...too.org, paul.walmsley@...ive.com, palmer@...belt.com,
	aou@...s.berkeley.edu, alex@...ti.fr, p.zabel@...gutronix.de,
	drew@...7.com, emil.renner.berthing@...onical.com,
	inochiama@...il.com, geert+renesas@...der.be, tglx@...utronix.de,
	hal.feng@...rfivetech.com, joel@....id.au, duje.mihanovic@...le.hr,
	elder@...cstar.com, dmaengine@...r.kernel.org,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-riscv@...ts.infradead.org, spacemit@...ts.linux.dev
Subject: Re: [PATCH 2/8] dma: mmp_pdma: Add optional clock support

On 11-06-25, 20:57, Guodong Xu wrote:
> Add support for retrieving and enabling an optional clock using
> devm_clk_get_optional_enabled() during mmp_pdma_probe().

Its dmaengine, please tag them as such

> 
> Signed-off-by: Guodong Xu <guodong@...cstar.com>
> ---
>  drivers/dma/mmp_pdma.c | 6 ++++++
>  1 file changed, 6 insertions(+)
> 
> diff --git a/drivers/dma/mmp_pdma.c b/drivers/dma/mmp_pdma.c
> index a95d31103d30..4a6dbf558237 100644
> --- a/drivers/dma/mmp_pdma.c
> +++ b/drivers/dma/mmp_pdma.c
> @@ -15,6 +15,7 @@
>  #include <linux/device.h>
>  #include <linux/platform_data/mmp_dma.h>
>  #include <linux/dmapool.h>
> +#include <linux/clk.h>
>  #include <linux/of_dma.h>
>  #include <linux/of.h>
>  
> @@ -1019,6 +1020,7 @@ static int mmp_pdma_probe(struct platform_device *op)
>  {
>  	struct mmp_pdma_device *pdev;
>  	struct mmp_dma_platdata *pdata = dev_get_platdata(&op->dev);
> +	struct clk *clk;
>  	int i, ret, irq = 0;
>  	int dma_channels = 0, irq_num = 0;
>  	const enum dma_slave_buswidth widths =
> @@ -1037,6 +1039,10 @@ static int mmp_pdma_probe(struct platform_device *op)
>  	if (IS_ERR(pdev->base))
>  		return PTR_ERR(pdev->base);
>  
> +	clk = devm_clk_get_optional_enabled(pdev->dev, NULL);
> +	if (IS_ERR(clk))
> +		return PTR_ERR(clk);
> +
>  	if (pdev->dev->of_node) {
>  		/* Parse new and deprecated dma-channels properties */
>  		if (of_property_read_u32(pdev->dev->of_node, "dma-channels",
> -- 
> 2.43.0

-- 
~Vinod