On Thu, Apr 14, 2022 at 2:14 AM Ian Ray ian.ray@ge.com wrote:
On Wed, Apr 13, 2022 at 03:54:37PM -0700, Tim Harvey wrote:
If vpcie-supply is defined by device-tree use that if CONFIG_PCIE_IMX_POWER_GPIO is not defined.
Note that after this the following boards which define CONFIG_PCIE_IMX_POWER_GPIO in their board header file as well as their device-tree should be able to remove CONFIG_PCIE_IMX_PERST_GPIO without consequence:
- mx6sabresd
- mx6sxsabresd
- novena
Note that the ge_bx50v3 board uses CONFIG_PCIE_IMX_POWER_GPIO and does not have vpcie-supply defined in it's pcie node in the dt thus removing CONFIG_PCIE_IMX_POWER_GPIO globally can't be done until that board adds vpcie-supply.
The use of CONFIG_PCIE_IMX_POWER_GPIO by ge_bx50v3 appears to be a mistake. That GPIO is actually an input "Q7_3V3_PCIE_WAKE#_IN". Thank you for the report -- I will prepare a patch to remove that #define.
Ian,
Great... cc me on that patch if you don't mind.
Marek, looks like you're the maintainer of the novena board, do you have one around to test PCI reset with CONFIG_PCIE_IMX_POWER_GPIO removed?
Fabio, looks like you're the maintainer of the mx6sabresd and mx6sxsabresd boards, do you have one around to test PCI reset with CONFIG_PCIE_IMX_POWER_GPIO removed?
If Marke and Fabio can confirm that removing CONFIG_PCIE_IMX_POWER_GPIO isn't an issue I can submit a series with this followed by the removal of CONFIG_PCIE_IMX_POWER_GPIO.
Best Regards,
Tim
Cc: Ian Ray ian.ray@ge.com (maintainer:GE BX50V3 BOARD) Cc: Sebastian Reichel sebastian.reichel@collabora.com (maintainer:GE BX50V3 BOARD) Cc: Fabio Estevam festevam@gmail.com (maintainer:MX6SABRESD BOARD) Cc: Marek Vasut marex@denx.de (maintainer:NOVENA BOARD) Signed-off-by: Tim Harvey tharvey@gateworks.com
arch/arm/include/asm/arch-mx6/sys_proto.h | 2 +- drivers/pci/pcie_imx.c | 19 +++++++++++++++++-- 2 files changed, 18 insertions(+), 3 deletions(-)
diff --git a/arch/arm/include/asm/arch-mx6/sys_proto.h b/arch/arm/include/asm/arch-mx6/sys_proto.h index c49759af92d1..c7542e4b04e1 100644 --- a/arch/arm/include/asm/arch-mx6/sys_proto.h +++ b/arch/arm/include/asm/arch-mx6/sys_proto.h @@ -18,7 +18,7 @@ #define is_usbotg_phy_active(void) (!(readl(USB_PHY0_BASE_ADDR + USBPHY_PWD) & \ USBPHY_PWD_RXPWDRX))
-int imx6_pcie_toggle_power(void); +int imx6_pcie_toggle_power(struct udevice *vpcie); int imx6_pcie_toggle_reset(struct gpio_desc *gpio, bool active_high);
enum ldo_reg { diff --git a/drivers/pci/pcie_imx.c b/drivers/pci/pcie_imx.c index 2cec3900e9ad..f8daedbce359 100644 --- a/drivers/pci/pcie_imx.c +++ b/drivers/pci/pcie_imx.c @@ -14,6 +14,7 @@ #include <log.h> #include <malloc.h> #include <pci.h> +#include <power/regulator.h> #include <asm/arch/clock.h> #include <asm/arch/iomux.h> #include <asm/arch/crm_regs.h> @@ -102,6 +103,7 @@ struct imx_pcie_priv { void __iomem *cfg_base; struct gpio_desc reset_gpio; bool reset_active_high;
struct udevice *vpcie;};
/* @@ -530,7 +532,7 @@ static int imx6_pcie_init_phy(void) return 0; }
-__weak int imx6_pcie_toggle_power(void) +__weak int imx6_pcie_toggle_power(struct udevice *vpcie) { #ifdef CONFIG_PCIE_IMX_POWER_GPIO gpio_request(CONFIG_PCIE_IMX_POWER_GPIO, "pcie_power"); @@ -540,6 +542,15 @@ __weak int imx6_pcie_toggle_power(void) mdelay(20); gpio_free(CONFIG_PCIE_IMX_POWER_GPIO); #endif
+#if CONFIG_IS_ENABLED(DM_REGULATOR)
if (vpcie) {regulator_set_enable(vpcie, false);mdelay(20);regulator_set_enable(vpcie, true);mdelay(20);}+#endif return 0; }
@@ -598,7 +609,7 @@ static int imx6_pcie_deassert_core_reset(struct imx_pcie_priv *priv) { struct iomuxc *iomuxc_regs = (struct iomuxc *)IOMUXC_BASE_ADDR;
imx6_pcie_toggle_power();
imx6_pcie_toggle_power(priv->vpcie); enable_pcie_clock();@@ -717,6 +728,10 @@ static int imx_pcie_dm_probe(struct udevice *dev) { struct imx_pcie_priv *priv = dev_get_priv(dev);
+#if CONFIG_IS_ENABLED(DM_REGULATOR)
device_get_supply_regulator(dev, "vpcie-supply", &priv->vpcie);+#endif
/* if PERST# valid from dt then assert it */ gpio_request_by_name(dev, "reset-gpio", 0, &priv->reset_gpio, GPIOD_IS_OUT);-- 2.17.1