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| author | Jakub Kicinski <kuba@kernel.org> | 2021-12-16 16:13:19 -0800 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2021-12-16 16:13:19 -0800 |
| commit | 7cd2802d7496c1fc76f42dc045b48cc16d11df39 (patch) | |
| tree | 41c33f5944bbc686a489801762eb126e07049b81 /drivers/pci/controller/pcie-apple.c | |
| parent | 0f473bb6ed2d0b8533a079ee133f625f83de5315 (diff) | |
| parent | 6441998e2e37131b0a4c310af9156d79d3351c16 (diff) | |
| download | linux-7cd2802d7496c1fc76f42dc045b48cc16d11df39.tar.gz linux-7cd2802d7496c1fc76f42dc045b48cc16d11df39.tar.bz2 linux-7cd2802d7496c1fc76f42dc045b48cc16d11df39.zip | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
No conflicts.
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'drivers/pci/controller/pcie-apple.c')
| -rw-r--r-- | drivers/pci/controller/pcie-apple.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/drivers/pci/controller/pcie-apple.c b/drivers/pci/controller/pcie-apple.c index 1bf4d75b61be..b090924b41fe 100644 --- a/drivers/pci/controller/pcie-apple.c +++ b/drivers/pci/controller/pcie-apple.c @@ -516,7 +516,7 @@ static int apple_pcie_setup_port(struct apple_pcie *pcie, int ret, i; reset = gpiod_get_from_of_node(np, "reset-gpios", 0, - GPIOD_OUT_LOW, "#PERST"); + GPIOD_OUT_LOW, "PERST#"); if (IS_ERR(reset)) return PTR_ERR(reset); @@ -539,12 +539,22 @@ static int apple_pcie_setup_port(struct apple_pcie *pcie, rmw_set(PORT_APPCLK_EN, port->base + PORT_APPCLK); + /* Assert PERST# before setting up the clock */ + gpiod_set_value(reset, 1); + ret = apple_pcie_setup_refclk(pcie, port); if (ret < 0) return ret; + /* The minimal Tperst-clk value is 100us (PCIe CEM r5.0, 2.9.2) */ + usleep_range(100, 200); + + /* Deassert PERST# */ rmw_set(PORT_PERST_OFF, port->base + PORT_PERST); - gpiod_set_value(reset, 1); + gpiod_set_value(reset, 0); + + /* Wait for 100ms after PERST# deassertion (PCIe r5.0, 6.6.1) */ + msleep(100); ret = readl_relaxed_poll_timeout(port->base + PORT_STATUS, stat, stat & PORT_STATUS_READY, 100, 250000); |