Re: [PATCH 23/23] staging: media: tegra-video: add tegra20 variant

[Luca Ceresoli <luca.ceresoli@bootlin.com>]

On Wed,  9 Nov 2022 15:18:52 +0100
luca.ceresoli@bootlin.com wrote:

> +static int tegra20_vi_enable(struct tegra_vi *vi, bool on)
> +{
> +	/* from arch/arm/mach-tegra/iomap.h */
> +	const phys_addr_t TEGRA_APB_MISC_BASE = 0x70000000;
> +	const unsigned long reg_offset = 0x42c;
> +	void __iomem *apb_misc;
> +	u32 val;
> +
> +	apb_misc = ioremap(TEGRA_APB_MISC_BASE, PAGE_SIZE);
> +	if (!apb_misc)
> +		apb_misc = ERR_PTR(-ENOENT);
> +	if (IS_ERR(apb_misc))
> +		return dev_err_probe(vi->dev, PTR_ERR(apb_misc), "cannot access APB_MISC");
> +
> +	val = readl(apb_misc + reg_offset);
> +	writel(val | (!!on), apb_misc + reg_offset);

Sorry, there is a mistake here, the bit should be set to 0 when
on==false, but this code does not do that. This will be fixed in v2.

-- 
Luca Ceresoli, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com