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pci: imx: use vpcie-supply if defined by device-tree

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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.

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>
This commit is contained in:
Tim Harvey 2022-04-13 15:54:37 -07:00 committed by Stefano Babic
parent fc102c87c1
commit 6f6e069ca3
2 changed files with 18 additions and 3 deletions
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2
arch/arm/include/asm/arch-mx6/sys_proto.h
View file

@ -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 {

19
drivers/pci/pcie_imx.c
View file

@ -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);