On 02/03/2022 09:43, Ashish Mhetre wrote:
> From tegra186 onwards, memory controller support multiple channels.
> Add support for mapping address spaces of these channels.
> During error interrupts from memory controller, appropriate registers
> from these channels need to be accessed for logging error info.
>
> Signed-off-by: Ashish Mhetre <amhetre@xxxxxxxxxx>
> ---
> drivers/memory/tegra/mc.c | 6 ++++++
> drivers/memory/tegra/tegra186.c | 21 +++++++++++++++++++++
> drivers/memory/tegra/tegra194.c | 1 +
> drivers/memory/tegra/tegra234.c | 1 +
> include/soc/tegra/mc.h | 7 +++++++
> 5 files changed, 36 insertions(+)
>
> diff --git a/drivers/memory/tegra/mc.c b/drivers/memory/tegra/mc.c
> index bf3abb6..3cda1d9 100644
> --- a/drivers/memory/tegra/mc.c
> +++ b/drivers/memory/tegra/mc.c
> @@ -749,6 +749,12 @@ static int tegra_mc_probe(struct platform_device *pdev)
> if (IS_ERR(mc->regs))
> return PTR_ERR(mc->regs);
>
> + if (mc->soc->ops && mc->soc->ops->map_regs) {
> + err = mc->soc->ops->map_regs(mc, pdev);
> + if (err < 0)
> + return err;
> + }
> +
> mc->debugfs.root = debugfs_create_dir("mc", NULL);
>
> if (mc->soc->ops && mc->soc->ops->probe) {
> diff --git a/drivers/memory/tegra/tegra186.c b/drivers/memory/tegra/tegra186.c
> index 3d15388..59a4425 100644
> --- a/drivers/memory/tegra/tegra186.c
> +++ b/drivers/memory/tegra/tegra186.c
> @@ -139,11 +139,31 @@ static int tegra186_mc_probe_device(struct tegra_mc *mc, struct device *dev)
> return 0;
> }
>
> +static int tegra186_mc_map_regs(struct tegra_mc *mc,
> + struct platform_device *pdev)
> +{
> + struct resource *res;
> + int i;
> +
> + mc->mcb_regs = devm_platform_get_and_ioremap_resource(pdev, 1, &res);
> + if (IS_ERR(mc->mcb_regs))
> + return PTR_ERR(mc->mcb_regs);
> +
> + for (i = 0; i < mc->soc->num_channels; i++) {
> + mc->mc_regs[i] = devm_platform_get_and_ioremap_resource(pdev, i + 2, &res);
> + if (IS_ERR(mc->mc_regs[i]))
> + return PTR_ERR(mc->mc_regs[i]);
This breaks the ABI, so I need Thierry's ack that such ABI break is
perfectly ok.
> + }
> +
> + return 0;
> +}
> +
Best regards,
Krzysztof
