linux-kernel - Re: [PATCH v2 03/20] drviers: crypto: meson: add platform data

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Date: Wed, 24 Jan 2024 08:30:48 +0100
From: Corentin Labbe <clabbe.montjoie@...il.com>
To: Alexey Romanov <avromanov@...utedevices.com>
Cc: neil.armstrong@...aro.org, clabbe@...libre.com,
	herbert@...dor.apana.org.au, davem@...emloft.net,
	robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
	conor+dt@...nel.org, khilman@...libre.com, jbrunet@...libre.com,
	martin.blumenstingl@...glemail.com, linux-crypto@...r.kernel.org,
	linux-amlogic@...ts.infradead.org, linux-kernel@...r.kernel.org,
	devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	kernel@...utedevices.com
Subject: Re: [PATCH v2 03/20] drviers: crypto: meson: add platform data

Le Tue, Jan 23, 2024 at 07:58:14PM +0300, Alexey Romanov a écrit :
> To support other Amlogic SoC's we have to
> use platform data: descriptors and status registers
> offsets are individual for each SoC series.
> 
> Signed-off-by: Alexey Romanov <avromanov@...utedevices.com>
> ---
>  drivers/crypto/amlogic/amlogic-gxl-cipher.c |  2 +-
>  drivers/crypto/amlogic/amlogic-gxl-core.c   | 31 +++++++++++++++------
>  drivers/crypto/amlogic/amlogic-gxl.h        | 11 ++++++++
>  3 files changed, 35 insertions(+), 9 deletions(-)
> 
> diff --git a/drivers/crypto/amlogic/amlogic-gxl-cipher.c b/drivers/crypto/amlogic/amlogic-gxl-cipher.c
> index b19032f92415..7eff3ae7356f 100644
> --- a/drivers/crypto/amlogic/amlogic-gxl-cipher.c
> +++ b/drivers/crypto/amlogic/amlogic-gxl-cipher.c
> @@ -225,7 +225,7 @@ static int meson_cipher(struct skcipher_request *areq)
>  
>  	reinit_completion(&mc->chanlist[flow].complete);
>  	mc->chanlist[flow].status = 0;
> -	writel(mc->chanlist[flow].t_phy | 2, mc->base + (flow << 2));
> +	writel(mc->chanlist[flow].t_phy | 2, mc->base + ((mc->pdata->descs_reg + flow) << 2));
>  	wait_for_completion_interruptible_timeout(&mc->chanlist[flow].complete,
>  						  msecs_to_jiffies(500));
>  	if (mc->chanlist[flow].status == 0) {
> diff --git a/drivers/crypto/amlogic/amlogic-gxl-core.c b/drivers/crypto/amlogic/amlogic-gxl-core.c
> index a58644be76e9..2be381e157c4 100644
> --- a/drivers/crypto/amlogic/amlogic-gxl-core.c
> +++ b/drivers/crypto/amlogic/amlogic-gxl-core.c
> @@ -18,6 +18,7 @@
>  #include <linux/kernel.h>
>  #include <linux/module.h>
>  #include <linux/of.h>
> +#include <linux/of_device.h>
>  #include <linux/platform_device.h>
>  
>  #include "amlogic-gxl.h"
> @@ -30,9 +31,10 @@ static irqreturn_t meson_irq_handler(int irq, void *data)
>  
>  	for (flow = 0; flow < mc->flow_cnt; flow++) {
>  		if (mc->chanlist[flow].irq == irq) {
> -			p = readl(mc->base + ((0x04 + flow) << 2));
> +			p = readl(mc->base + ((mc->pdata->status_reg + flow) << 2));
>  			if (p) {
> -				writel_relaxed(0xF, mc->base + ((0x4 + flow) << 2));
> +				writel_relaxed(0xF, mc->base +
> +					      ((mc->pdata->status_reg + flow) << 2));
>  				mc->chanlist[flow].status = 1;
>  				complete(&mc->chanlist[flow].complete);
>  				return IRQ_HANDLED;
> @@ -245,15 +247,34 @@ static void meson_unregister_algs(struct meson_dev *mc)
>  	}
>  }
>  
> +static const struct meson_pdata meson_gxl_pdata = {
> +	.descs_reg = 0x0,
> +	.status_reg = 0x4,
> +};
> +
> +static const struct of_device_id meson_crypto_of_match_table[] = {
> +	{
> +		.compatible = "amlogic,gxl-crypto",
> +		.data = &meson_gxl_pdata,
> +	},
> +	{},
> +};
> +
>  static int meson_crypto_probe(struct platform_device *pdev)
>  {
> +	const struct of_device_id *match;
>  	struct meson_dev *mc;
>  	int err;
>  
> +	match = of_match_device(meson_crypto_of_match_table, &pdev->dev);
> +	if (!match)
> +		return -EINVAL;
> +
>  	mc = devm_kzalloc(&pdev->dev, sizeof(*mc), GFP_KERNEL);
>  	if (!mc)
>  		return -ENOMEM;
>  
> +	mc->pdata = match->data;
>  	mc->dev = &pdev->dev;
>  	platform_set_drvdata(pdev, mc);
>  
> @@ -312,12 +333,6 @@ static void meson_crypto_remove(struct platform_device *pdev)
>  	clk_disable_unprepare(mc->busclk);
>  }
>  
> -static const struct of_device_id meson_crypto_of_match_table[] = {
> -	{ .compatible = "amlogic,gxl-crypto", },
> -	{}
> -};
> -MODULE_DEVICE_TABLE(of, meson_crypto_of_match_table);

Hello

This patch breaks bisection, since it removes MODULE_DEVICE_TABLE.
After applying patchs 1,2,3 the driver does not load anymore on lepotato board.

Regards