From: Rick Wertenbroek rick.wertenbroek@gmail.com
[ Upstream commit 92a9c57c325dd51682d428ba960d961fec3c8a08 ]
Remove write accesses to registers that are marked "unused" (and therefore read-only) in the technical reference manual (TRM) (see RK3399 TRM 17.6.8.1)
Link: https://lore.kernel.org/r/20230418074700.1083505-2-rick.wertenbroek@gmail.co... Tested-by: Damien Le Moal dlemoal@kernel.org Signed-off-by: Rick Wertenbroek rick.wertenbroek@gmail.com Signed-off-by: Lorenzo Pieralisi lpieralisi@kernel.org Reviewed-by: Damien Le Moal dlemoal@kernel.org Stable-dep-of: dc73ed0f1b8b ("PCI: rockchip: Fix window mapping and address translation for endpoint") Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/pci/controller/pcie-rockchip-ep.c | 10 ---------- 1 file changed, 10 deletions(-)
diff --git a/drivers/pci/controller/pcie-rockchip-ep.c b/drivers/pci/controller/pcie-rockchip-ep.c index 827d91e73efab..9e17f3dba743a 100644 --- a/drivers/pci/controller/pcie-rockchip-ep.c +++ b/drivers/pci/controller/pcie-rockchip-ep.c @@ -61,10 +61,6 @@ static void rockchip_pcie_clear_ep_ob_atu(struct rockchip_pcie *rockchip, ROCKCHIP_PCIE_AT_OB_REGION_DESC0(region)); rockchip_pcie_write(rockchip, 0, ROCKCHIP_PCIE_AT_OB_REGION_DESC1(region)); - rockchip_pcie_write(rockchip, 0, - ROCKCHIP_PCIE_AT_OB_REGION_CPU_ADDR0(region)); - rockchip_pcie_write(rockchip, 0, - ROCKCHIP_PCIE_AT_OB_REGION_CPU_ADDR1(region)); }
static void rockchip_pcie_prog_ep_ob_atu(struct rockchip_pcie *rockchip, u8 fn, @@ -114,12 +110,6 @@ static void rockchip_pcie_prog_ep_ob_atu(struct rockchip_pcie *rockchip, u8 fn, PCIE_CORE_OB_REGION_ADDR0_LO_ADDR); addr1 = upper_32_bits(cpu_addr); } - - /* CPU bus address region */ - rockchip_pcie_write(rockchip, addr0, - ROCKCHIP_PCIE_AT_OB_REGION_CPU_ADDR0(r)); - rockchip_pcie_write(rockchip, addr1, - ROCKCHIP_PCIE_AT_OB_REGION_CPU_ADDR1(r)); }
static int rockchip_pcie_ep_write_header(struct pci_epc *epc, u8 fn, u8 vfn,