On Tue, Apr 16, 2019 at 20:27:22, Vidya Sagar <vidyas@xxxxxxxxxx> wrote:
> Add support to enable CDM (Configuration Dependent Module) register check
> for any data corruption based on the device-tree flag 'enable-cdm-check'.
>
> Signed-off-by: Vidya Sagar <vidyas@xxxxxxxxxx>
> ---
> Changes since [v2]:
> * Changed code and commit description to reflect change in flag from
> 'cdm-check' to 'enable-cdm-check'
>
> Changes since [v1]:
> * This is a new patch in v2 series
>
> drivers/pci/controller/dwc/pcie-designware.c | 7 +++++++
> drivers/pci/controller/dwc/pcie-designware.h | 9 +++++++++
> 2 files changed, 16 insertions(+)
>
> diff --git a/drivers/pci/controller/dwc/pcie-designware.c b/drivers/pci/controller/dwc/pcie-designware.c
> index 44c0ba078452..5b416f483426 100644
> --- a/drivers/pci/controller/dwc/pcie-designware.c
> +++ b/drivers/pci/controller/dwc/pcie-designware.c
> @@ -503,4 +503,11 @@ void dw_pcie_setup(struct dw_pcie *pci)
> break;
> }
> dw_pcie_writel_dbi(pci, PCIE_LINK_WIDTH_SPEED_CONTROL, val);
> +
> + if (of_property_read_bool(np, "enable-cdm-check")) {
> + val = dw_pcie_readl_dbi(pci, PCIE_PL_CHK_REG_CONTROL_STATUS);
> + val |= PCIE_PL_CHK_REG_CHK_REG_CONTINUOUS |
> + PCIE_PL_CHK_REG_CHK_REG_START;
> + dw_pcie_writel_dbi(pci, PCIE_PL_CHK_REG_CONTROL_STATUS, val);
> + }
> }
> diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h
> index fa41d675c48f..7f57fe019fbf 100644
> --- a/drivers/pci/controller/dwc/pcie-designware.h
> +++ b/drivers/pci/controller/dwc/pcie-designware.h
> @@ -83,6 +83,15 @@
> #define PCIE_MISC_CONTROL_1_OFF 0x8BC
> #define PCIE_DBI_RO_WR_EN BIT(0)
>
> +#define PCIE_PL_CHK_REG_CONTROL_STATUS 0xB20
> +#define PCIE_PL_CHK_REG_CHK_REG_START BIT(0)
> +#define PCIE_PL_CHK_REG_CHK_REG_CONTINUOUS BIT(1)
> +#define PCIE_PL_CHK_REG_CHK_REG_COMPARISON_ERROR BIT(16)
> +#define PCIE_PL_CHK_REG_CHK_REG_LOGIC_ERROR BIT(17)
> +#define PCIE_PL_CHK_REG_CHK_REG_COMPLETE BIT(18)
> +
> +#define PCIE_PL_CHK_REG_ERR_ADDR 0xB28
> +
> /*
> * iATU Unroll-specific register definitions
> * From 4.80 core version the address translation will be made by unroll
> --
> 2.17.1
Nice.
Acked-by: Gustavo Pimentel <gustavo.pimentel@xxxxxxxxxxxx>
Thanks,
Gustavo
