On 28.07.22 15:03, Pali Rohár wrote:
Release PERST# signal via GPIO when "reset-gpios" is defined in device tree.
Signed-off-by: Pali Rohár pali@kernel.org
drivers/pci/pci_mvebu.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+)
diff --git a/drivers/pci/pci_mvebu.c b/drivers/pci/pci_mvebu.c index d80f87e0cfc6..269c027db204 100644 --- a/drivers/pci/pci_mvebu.c +++ b/drivers/pci/pci_mvebu.c @@ -22,6 +22,7 @@ #include <asm/io.h> #include <asm/arch/cpu.h> #include <asm/arch/soc.h> +#include <asm-generic/gpio.h> #include <linux/bitops.h> #include <linux/delay.h> #include <linux/errno.h> @@ -60,6 +61,7 @@ struct mvebu_pcie { struct resource mem; void __iomem *iobase; struct resource io;
- struct gpio_desc reset_gpio; u32 intregs; u32 port; u32 lane;
@@ -416,6 +418,14 @@ static int mvebu_pcie_probe(struct udevice *dev) struct udevice *ctlr = pci_get_controller(dev); struct pci_controller *hose = dev_get_uclass_priv(ctlr); u32 reg;
int ret;
/* Request for optional PERST# GPIO */
ret = gpio_request_by_name(dev, "reset-gpios", 0, &pcie->reset_gpio, GPIOD_IS_OUT);
if (ret && ret != -ENOENT) {
printf("%s: unable to request reset-gpios: %d\n", pcie->name, ret);return ret;}
/*
- Change Class Code of PCI Bridge device to PCI Bridge (0x600400)
@@ -537,6 +547,10 @@ static int mvebu_pcie_probe(struct udevice *dev) pcie->cfgcache[(PCI_PREF_MEMORY_BASE - 0x10) / 4] = PCI_PREF_RANGE_TYPE_64 | (PCI_PREF_RANGE_TYPE_64 << 16);
/* Release PERST# via GPIO when it was defined */
if (dm_gpio_is_valid(&pcie->reset_gpio))
dm_gpio_set_value(&pcie->reset_gpio, 0);mvebu_pcie_wait_for_link(pcie);
return 0;
While running some build tests, this error shows on some Kirkwood boards:
$ make pogo_v4_defconfig $ make -s -j20 ===================== WARNING ====================== This board does not use CONFIG_TIMER (Driver Model for Timer drivers). Please update the board to use CONFIG_TIMER before the v2023.01 release. Failure to update by the deadline may result in board removal. See doc/develop/driver-model/migration.rst for more info. ==================================================== ===================== WARNING ====================== This board does not use CONFIG_DM_SERIAL (Driver Model for Serial drivers). Please update the board to use CONFIG_DM_SERIAL before the v2023.04 release. Failure to update by the deadline may result in board removal. See doc/develop/driver-model/migration.rst for more info. ==================================================== /opt/kernel.org/gcc-11.1.0-nolibc/arm-linux-gnueabi/bin/arm-linux-gnueabi-ld.bfd: drivers/pci/pci_mvebu.o: in function `mvebu_pcie_probe': /home/stefan/git/u-boot/u-boot-marvell/drivers/pci/pci_mvebu.c:424: undefined reference to `gpio_request_by_name' /opt/kernel.org/gcc-11.1.0-nolibc/arm-linux-gnueabi/bin/arm-linux-gnueabi-ld.bfd: /home/stefan/git/u-boot/u-boot-marvell/drivers/pci/pci_mvebu.c:552: undefined reference to `dm_gpio_set_value' make: *** [Makefile:1818: u-boot] Error 1
Could you please take a look and make sure, that world build succeeds?
Thanks, Stefan