diff options
| author | Damien Le Moal <dlemoal@kernel.org> | 2024-10-17 10:58:46 +0900 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2024-11-25 13:18:36 -0600 |
| commit | 00080d0887df8c197c5b89e38215c14980eae544 (patch) | |
| tree | 2e73c74abb68b6e6f0788ba93f2b02d52dd8e60d /drivers/pci/controller | |
| parent | 091022f5f94513e5f11aa9e2f1cd9fdb4d00f83c (diff) | |
PCI: rockship-ep: Implement the pci_epc_ops::stop_link() operation
Define the EPC operation ->stop() for the Rockchip endpoint driver with
the function rockchip_pcie_ep_stop(). This function disables link
training and the controller configuration, as the reverse to what
the start operation defined with rockchip_pcie_ep_start() does.
Link: https://lore.kernel.org/r/20241017015849.190271-12-dlemoal@kernel.org
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Diffstat (limited to 'drivers/pci/controller')
| -rw-r--r-- | drivers/pci/controller/pcie-rockchip-ep.c | 13 | ||||
| -rw-r--r-- | drivers/pci/controller/pcie-rockchip.h | 1 |
2 files changed, 14 insertions, 0 deletions
diff --git a/drivers/pci/controller/pcie-rockchip-ep.c b/drivers/pci/controller/pcie-rockchip-ep.c index 6c4169b7930e..13755e4ed59d 100644 --- a/drivers/pci/controller/pcie-rockchip-ep.c +++ b/drivers/pci/controller/pcie-rockchip-ep.c @@ -476,6 +476,18 @@ static int rockchip_pcie_ep_start(struct pci_epc *epc) return 0; } +static void rockchip_pcie_ep_stop(struct pci_epc *epc) +{ + struct rockchip_pcie_ep *ep = epc_get_drvdata(epc); + struct rockchip_pcie *rockchip = &ep->rockchip; + + /* Stop link training and disable configuration */ + rockchip_pcie_write(rockchip, + PCIE_CLIENT_CONF_DISABLE | + PCIE_CLIENT_LINK_TRAIN_DISABLE, + PCIE_CLIENT_CONFIG); +} + static const struct pci_epc_features rockchip_pcie_epc_features = { .linkup_notifier = false, .msi_capable = true, @@ -500,6 +512,7 @@ static const struct pci_epc_ops rockchip_pcie_epc_ops = { .get_msi = rockchip_pcie_ep_get_msi, .raise_irq = rockchip_pcie_ep_raise_irq, .start = rockchip_pcie_ep_start, + .stop = rockchip_pcie_ep_stop, .get_features = rockchip_pcie_ep_get_features, }; diff --git a/drivers/pci/controller/pcie-rockchip.h b/drivers/pci/controller/pcie-rockchip.h index 30398156095f..0263f158ee8d 100644 --- a/drivers/pci/controller/pcie-rockchip.h +++ b/drivers/pci/controller/pcie-rockchip.h @@ -32,6 +32,7 @@ #define PCIE_CLIENT_CONF_ENABLE HIWORD_UPDATE_BIT(0x0001) #define PCIE_CLIENT_CONF_DISABLE HIWORD_UPDATE(0x0001, 0) #define PCIE_CLIENT_LINK_TRAIN_ENABLE HIWORD_UPDATE_BIT(0x0002) +#define PCIE_CLIENT_LINK_TRAIN_DISABLE HIWORD_UPDATE(0x0002, 0) #define PCIE_CLIENT_ARI_ENABLE HIWORD_UPDATE_BIT(0x0008) #define PCIE_CLIENT_CONF_LANE_NUM(x) HIWORD_UPDATE(0x0030, ENCODE_LANES(x)) #define PCIE_CLIENT_MODE_RC HIWORD_UPDATE_BIT(0x0040) |