[PATCH v2 2/3] i2c: sh_mobile: Use platform_get_irq_optional() to get the interrupt

[Wolfram Sang]

On Tue, Dec 21, 2021 at 05:53:21PM +0000, Lad Prabhakar wrote:
> platform_get_resource(pdev, IORESOURCE_IRQ, ..) relies on static
> allocation of IRQ resources in DT core code, this causes an issue
> when using hierarchical interrupt domains using "interrupts" property
> in the node as this bypasses the hierarchical setup and messes up the
> irq chaining.
> 
> In preparation for removal of static setup of IRQ resource from DT core
> code use platform_get_irq_optional() for DT users only.
> 
> Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj at bp.renesas.com>

Tested on a Renesas R-Car Gen3 SoC (M3-W) and IIC port still works and
no false positive printouts in the kernel log:

Reviewed-by: Wolfram Sang <wsa+renesas at sang-engineering.com>
Tested-by: Wolfram Sang <wsa+renesas at sang-engineering.com>

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