linux-kernel - Re: [PATCH V2 2/3] dmaengine: qcom_hidma: add support for the new revision

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Date:   Wed, 8 Nov 2017 11:12:09 -0600
From:   Timur Tabi <timur@...eaurora.org>
To:     Sinan Kaya <okaya@...eaurora.org>, dmaengine@...r.kernel.org
Cc:     linux-arm-msm@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH V2 2/3] dmaengine: qcom_hidma: add support for the new
 revision

On 11/08/2017 10:58 AM, Sinan Kaya wrote:
> Besides, C compiler also won't let me put two arrays together like this.
> 
> struct my_struct {
> 	struct some_struct array1[]
> 	struct some_struct array2[]
> }

Why not this:

const struct of_device_id hidma_msi_of_ids[] = {
	{.compatible = "qcom,hidma-1.1",},
	{.compatible = "qcom,hidma-1.2",},
	{},
},

static const struct acpi_device_id hidma_msi_acpi_ids[] = {
	{"QCOM8001", QDF2XXX_V1},
	{"QCOM8002", QDF2XXX_V2},
	{},
};

struct hidma_cap {
	const struct of_device_id *of;
	const struct acpi_device_id *acpi;
};

static struct hidma_cap hidma_msi_cap = {
	hidma_msi_of_ids,
	hidma_msi_acpi_ids
}

Keep in mind that you also need to add MODULE_DEVICE_TABLE entries, 
which you can't really do with your approach.

MODULE_DEVICE_TABLE(of, hidma_msi_of_ids);
MODULE_DEVICE_TABLE(acpi, hidma_msi_acpi_ids);

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