[PATCH v2 34/40] PCI: dwc: Centralize link gen setting

Rob Herring
2020-08-21T03:56:46Z

keystone would force gen2 if no DT property. Now it relies on the
PCI_EXP_LNKCAP value.

Cc: Kishon Vijay Abraham I <kishon@ti.com>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Richard Zhu <hongxing.zhu@nxp.com>
Cc: Lucas Stach <l.stach@pengutronix.de>
Cc: Shawn Guo <shawnguo@kernel.org>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Pengutronix Kernel Team <kernel@pengutronix.de>
Cc: Fabio Estevam <festevam@gmail.com>
Cc: NXP Linux Team <linux-imx@nxp.com>
Cc: Murali Karicheri <m-karicheri2@ti.com>
Cc: Jingoo Han <jingoohan1@gmail.com>
Cc: Gustavo Pimentel <gustavo.pimentel@synopsys.com>
Cc: Stanimir Varbanov <svarbanov@mm-sol.com>
Cc: Andy Gross <agross@kernel.org>
Cc: Bjorn Andersson <bjorn.andersson@linaro.org>
Cc: Pratyush Anand <pratyush.anand@gmail.com>
Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: Jonathan Hunter <jonathanh@nvidia.com>
Cc: linux-omap@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-arm-msm@vger.kernel.org
Cc: linux-tegra@vger.kernel.org
Signed-off-by: Rob Herring <robh@kernel.org>
---
drivers/pci/controller/dwc/pci-dra7xx.c | 25 --------------
drivers/pci/controller/dwc/pci-imx6.c | 9 ++---
drivers/pci/controller/dwc/pci-keystone.c | 33 -------------------
.../pci/controller/dwc/pcie-designware-ep.c | 11 +++++--
.../pci/controller/dwc/pcie-designware-host.c | 3 ++
drivers/pci/controller/dwc/pcie-designware.c | 32 ++++++++++--------
drivers/pci/controller/dwc/pcie-designware.h | 2 +-
drivers/pci/controller/dwc/pcie-intel-gw.c | 13 +++-----
drivers/pci/controller/dwc/pcie-qcom.c | 11 -------
drivers/pci/controller/dwc/pcie-spear13xx.c | 27 +--------------
drivers/pci/controller/dwc/pcie-tegra194.c | 23 -------------
11 files changed, 40 insertions(+), 149 deletions(-)

diff --git a/drivers/pci/controller/dwc/pci-dra7xx.c b/drivers/pci/controller/dwc/pci-dra7xx.c
index d42e0664f378..69cd43f74260 100644
--- a/drivers/pci/controller/dwc/pci-dra7xx.c
+++ b/drivers/pci/controller/dwc/pci-dra7xx.c
@@ -89,7 +89,6 @@ struct dra7xx_pcie {
void __iomem *base; /* DT ti_conf */
int phy_count; /* DT phy-names count */
struct phy **phy;
- int link_gen;
struct irq_domain *irq_domain;
enum dw_pcie_device_mode mode;
};
@@ -147,26 +146,6 @@ static int dra7xx_pcie_establish_link(struct dw_pcie *pci)
return 0;
}

- if (dra7xx->link_gen == 1) {
- dw_pcie_read(pci->dbi_base + exp_cap_off + PCI_EXP_LNKCAP,
- 4, &reg);
- if ((reg & PCI_EXP_LNKCAP_SLS) != PCI_EXP_LNKCAP_SLS_2_5GB) {
- reg &= ~((u32)PCI_EXP_LNKCAP_SLS);
- reg |= PCI_EXP_LNKCAP_SLS_2_5GB;
- dw_pcie_write(pci->dbi_base + exp_cap_off +
- PCI_EXP_LNKCAP, 4, reg);
- }
-
- dw_pcie_read(pci->dbi_base + exp_cap_off + PCI_EXP_LNKCTL2,
- 2, &reg);
- if ((reg & PCI_EXP_LNKCAP_SLS) != PCI_EXP_LNKCAP_SLS_2_5GB) {
- reg &= ~((u32)PCI_EXP_LNKCAP_SLS);
- reg |= PCI_EXP_LNKCAP_SLS_2_5GB;
- dw_pcie_write(pci->dbi_base + exp_cap_off +
- PCI_EXP_LNKCTL2, 2, reg);
- }
- }
-
reg = dra7xx_pcie_readl(dra7xx, PCIECTRL_DRA7XX_CONF_DEVICE_CMD);
reg |= LTSSM_EN;
dra7xx_pcie_writel(dra7xx, PCIECTRL_DRA7XX_CONF_DEVICE_CMD, reg);
@@ -935,10 +914,6 @@ static int __init dra7xx_pcie_probe(struct platform_device *pdev)
reg &= ~LTSSM_EN;
dra7xx_pcie_writel(dra7xx, PCIECTRL_DRA7XX_CONF_DEVICE_CMD, reg);

- dra7xx->link_gen = of_pci_get_max_link_speed(np);
- if (dra7xx->link_gen < 0 || dra7xx->link_gen > 2)
- dra7xx->link_gen = 2;
-
switch (mode) {
case DW_PCIE_RC_TYPE:
if (!IS_ENABLED(CONFIG_PCI_DRA7XX_HOST)) {
diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c
index 9f6018d3d338..337c74cbdfdb 100644
--- a/drivers/pci/controller/dwc/pci-imx6.c
+++ b/drivers/pci/controller/dwc/pci-imx6.c
@@ -79,7 +79,6 @@ struct imx6_pcie {
u32 tx_deemph_gen2_6db;
u32 tx_swing_full;
u32 tx_swing_low;
- int link_gen;
struct regulator *vpcie;
void __iomem *phy_base;

@@ -771,7 +770,7 @@ static int imx6_pcie_establish_link(struct imx6_pcie *imx6_pcie)
if (ret)
goto err_reset_phy;

- if (imx6_pcie->link_gen == 2) {
+ if (pci->link_gen == 2) {
/* Allow Gen2 mode after the link is up. */
tmp = dw_pcie_readl_dbi(pci, offset + PCI_EXP_LNKCAP);
tmp &= ~PCI_EXP_LNKCAP_SLS;
@@ -1153,10 +1152,8 @@ static int imx6_pcie_probe(struct platform_device *pdev)
imx6_pcie->tx_swing_low = 127;

/* Limit link speed */
- ret = of_property_read_u32(node, "fsl,max-link-speed",
- &imx6_pcie->link_gen);
- if (ret)
- imx6_pcie->link_gen = 1;
+ pci->link_gen = 1;
+ ret = of_property_read_u32(node, "fsl,max-link-speed", &pci->link_gen);

imx6_pcie->vpcie = devm_regulator_get_optional(&pdev->dev, "vpcie");
if (IS_ERR(imx6_pcie->vpcie)) {
diff --git a/drivers/pci/controller/dwc/pci-keystone.c b/drivers/pci/controller/dwc/pci-keystone.c
index 5fe36da0b7c6..b554812dace7 100644
--- a/drivers/pci/controller/dwc/pci-keystone.c
+++ b/drivers/pci/controller/dwc/pci-keystone.c
@@ -1107,32 +1107,6 @@ static int ks_pcie_am654_set_mode(struct device *dev,
return 0;
}

-static void ks_pcie_set_link_speed(struct dw_pcie *pci, int link_speed)
-{
- u32 val;
- u32 offset = dw_pcie_find_capability(pci, PCI_CAP_ID_EXP);
-
- dw_pcie_dbi_ro_wr_en(pci);
-
- val = dw_pcie_readl_dbi(pci, offset + PCI_EXP_LNKCAP);
- if ((val & PCI_EXP_LNKCAP_SLS) != link_speed) {
- val &= ~((u32)PCI_EXP_LNKCAP_SLS);
- val |= link_speed;
- dw_pcie_writel_dbi(pci, offset + PCI_EXP_LNKCAP,
- val);
- }
-
- val = dw_pcie_readl_dbi(pci, offset + PCI_EXP_LNKCTL2);
- if ((val & PCI_EXP_LNKCAP_SLS) != link_speed) {
- val &= ~((u32)PCI_EXP_LNKCAP_SLS);
- val |= link_speed;
- dw_pcie_writel_dbi(pci, offset + PCI_EXP_LNKCTL2,
- val);
- }
-
- dw_pcie_dbi_ro_wr_dis(pci);
-}
-
static const struct ks_pcie_of_data ks_pcie_rc_of_data = {
.host_ops = &ks_pcie_host_ops,
.version = 0x365A,
@@ -1185,7 +1159,6 @@ static int __init ks_pcie_probe(struct platform_device *pdev)
unsigned int version;
void __iomem *base;
struct phy **phy;
- int link_speed;
u32 num_lanes;
char name[10];
int ret;
@@ -1320,12 +1293,6 @@ static int __init ks_pcie_probe(struct platform_device *pdev)
goto err_get_sync;
}

- link_speed = of_pci_get_max_link_speed(np);
- if (link_speed < 0)
- link_speed = 2;
-
- ks_pcie_set_link_speed(pci, link_speed);
-
switch (mode) {
case DW_PCIE_RC_TYPE:
if (!IS_ENABLED(CONFIG_PCI_KEYSTONE_HOST)) {
diff --git a/drivers/pci/controller/dwc/pcie-designware-ep.c b/drivers/pci/controller/dwc/pcie-designware-ep.c
index 305bfec2424d..1a0f0ef4e97f 100644
--- a/drivers/pci/controller/dwc/pcie-designware-ep.c
+++ b/drivers/pci/controller/dwc/pcie-designware-ep.c
@@ -12,6 +12,8 @@
#include <linux/pci-epc.h>
#include <linux/pci-epf.h>

+#include "../../pci.h"
+
void dw_pcie_ep_linkup(struct dw_pcie_ep *ep)
{
struct pci_epc *epc = ep->epc;
@@ -518,18 +520,20 @@ int dw_pcie_ep_init_complete(struct dw_pcie_ep *ep)
ep->msix_cap = dw_pcie_find_capability(pci, PCI_CAP_ID_MSIX);

offset = dw_pcie_ep_find_ext_capability(pci, PCI_EXT_CAP_ID_REBAR);
+
+ dw_pcie_dbi_ro_wr_en(pci);
+
if (offset) {
reg = dw_pcie_readl_dbi(pci, offset + PCI_REBAR_CTRL);
nbars = (reg & PCI_REBAR_CTRL_NBAR_MASK) >>
PCI_REBAR_CTRL_NBAR_SHIFT;

- dw_pcie_dbi_ro_wr_en(pci);
for (i = 0; i < nbars; i++, offset += PCI_REBAR_CTRL)
dw_pcie_writel_dbi(pci, offset + PCI_REBAR_CAP, 0x0);
- dw_pcie_dbi_ro_wr_dis(pci);
}

dw_pcie_setup(pci);
+ dw_pcie_dbi_ro_wr_dis(pci);

return 0;
}
@@ -590,6 +594,9 @@ int dw_pcie_ep_init(struct dw_pcie_ep *ep)
return -ENOMEM;
ep->outbound_addr = addr;

+ if (pci->link_gen < 1)
+ pci->link_gen = of_pci_get_max_link_speed(np);
+
epc = devm_pci_epc_create(dev, &epc_ops);
if (IS_ERR(epc)) {
dev_err(dev, "Failed to create epc device\n");
diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c
index 1c750659aef8..4c1c1896ccab 100644
--- a/drivers/pci/controller/dwc/pcie-designware-host.c
+++ b/drivers/pci/controller/dwc/pcie-designware-host.c
@@ -361,6 +361,9 @@ int dw_pcie_host_init(struct pcie_port *pp)
if (ret)
pci->num_viewport = 2;

+ if (pci->link_gen < 1)
+ pci->link_gen = of_pci_get_max_link_speed(np);
+
if (pci_msi_enabled()) {
/*
* If a specific SoC driver needs to change the
diff --git a/drivers/pci/controller/dwc/pcie-designware.c b/drivers/pci/controller/dwc/pcie-designware.c
index b0a030661860..448f62f2e6ea 100644
--- a/drivers/pci/controller/dwc/pcie-designware.c
+++ b/drivers/pci/controller/dwc/pcie-designware.c
@@ -473,37 +473,40 @@ void dw_pcie_upconfig_setup(struct dw_pcie *pci)
}
EXPORT_SYMBOL_GPL(dw_pcie_upconfig_setup);

-void dw_pcie_link_set_max_speed(struct dw_pcie *pci, u32 link_gen)
+static void dw_pcie_link_set_max_speed(struct dw_pcie *pci, u32 link_gen)
{
- u32 reg, val;
+ u32 cap, ctrl2, link_speed;
u8 offset = dw_pcie_find_capability(pci, PCI_CAP_ID_EXP);

- reg = dw_pcie_readl_dbi(pci, offset + PCI_EXP_LNKCTL2);
- reg &= ~PCI_EXP_LNKCTL2_TLS;
+ cap = dw_pcie_readl_dbi(pci, offset + PCI_EXP_LNKCAP);
+ ctrl2 = dw_pcie_readl_dbi(pci, offset + PCI_EXP_LNKCTL2);
+ ctrl2 &= ~PCI_EXP_LNKCTL2_TLS;

switch (pcie_link_speed[link_gen]) {
case PCIE_SPEED_2_5GT:
- reg |= PCI_EXP_LNKCTL2_TLS_2_5GT;
+ link_speed = PCI_EXP_LNKCTL2_TLS_2_5GT;
break;
case PCIE_SPEED_5_0GT:
- reg |= PCI_EXP_LNKCTL2_TLS_5_0GT;
+ link_speed = PCI_EXP_LNKCTL2_TLS_5_0GT;
break;
case PCIE_SPEED_8_0GT:
- reg |= PCI_EXP_LNKCTL2_TLS_8_0GT;
+ link_speed = PCI_EXP_LNKCTL2_TLS_8_0GT;
break;
case PCIE_SPEED_16_0GT:
- reg |= PCI_EXP_LNKCTL2_TLS_16_0GT;
+ link_speed = PCI_EXP_LNKCTL2_TLS_16_0GT;
break;
default:
/* Use hardware capability */
- val = dw_pcie_readl_dbi(pci, offset + PCI_EXP_LNKCAP);
- val = FIELD_GET(PCI_EXP_LNKCAP_SLS, val);
- reg &= ~PCI_EXP_LNKCTL2_HASD;
- reg |= FIELD_PREP(PCI_EXP_LNKCTL2_TLS, val);
+ link_speed = FIELD_GET(PCI_EXP_LNKCAP_SLS, cap);
+ ctrl2 &= ~PCI_EXP_LNKCTL2_HASD;
break;
}

- dw_pcie_writel_dbi(pci, offset + PCI_EXP_LNKCTL2, reg);
+ dw_pcie_writel_dbi(pci, offset + PCI_EXP_LNKCTL2, ctrl2 | link_speed);
+
+ cap &= ~((u32)PCI_EXP_LNKCAP_SLS);
+ dw_pcie_writel_dbi(pci, offset + PCI_EXP_LNKCAP, cap | link_speed);
+
}
EXPORT_SYMBOL_GPL(dw_pcie_link_set_max_speed);

@@ -545,6 +548,9 @@ void dw_pcie_setup(struct dw_pcie *pci)
dev_dbg(pci->dev, "iATU unroll: %s\n", pci->iatu_unroll_enabled ?
"enabled" : "disabled");

+ if (pci->link_gen > 0)
+ dw_pcie_link_set_max_speed(pci, pci->link_gen);
+
val = dw_pcie_readl_dbi(pci, PCIE_PORT_LINK_CONTROL);
val &= ~PORT_LINK_FAST_LINK_MODE;
dw_pcie_writel_dbi(pci, PCIE_PORT_LINK_CONTROL, val);
diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h
index f4b871e3d73f..0b48298362cd 100644
--- a/drivers/pci/controller/dwc/pcie-designware.h
+++ b/drivers/pci/controller/dwc/pcie-designware.h
@@ -252,6 +252,7 @@ struct dw_pcie {
const struct dw_pcie_ops *ops;
unsigned int version;
int num_lanes;
+ int link_gen;
};

#define to_dw_pcie_from_pp(port) container_of((port), struct dw_pcie, pp)
@@ -270,7 +271,6 @@ void dw_pcie_write_dbi(struct dw_pcie *pci, u32 reg, size_t size, u32 val);
void dw_pcie_write_dbi2(struct dw_pcie *pci, u32 reg, size_t size, u32 val);
int dw_pcie_link_up(struct dw_pcie *pci);
void dw_pcie_upconfig_setup(struct dw_pcie *pci);
-void dw_pcie_link_set_max_speed(struct dw_pcie *pci, u32 link_gen);
void dw_pcie_link_set_n_fts(struct dw_pcie *pci, u32 n_fts);
int dw_pcie_wait_for_link(struct dw_pcie *pci);
void dw_pcie_prog_outbound_atu(struct dw_pcie *pci, int index,
diff --git a/drivers/pci/controller/dwc/pcie-intel-gw.c b/drivers/pci/controller/dwc/pcie-intel-gw.c
index c3b3a1d162b5..2c0d32ffb828 100644
--- a/drivers/pci/controller/dwc/pcie-intel-gw.c
+++ b/drivers/pci/controller/dwc/pcie-intel-gw.c
@@ -67,8 +67,6 @@ struct intel_pcie_port {
void __iomem *app_base;
struct gpio_desc *reset_gpio;
u32 rst_intrvl;
- u32 max_speed;
- u32 link_gen;
u32 max_width;
u32 n_fts;
struct clk *core_clk;
@@ -137,7 +135,6 @@ static void intel_pcie_link_setup(struct intel_pcie_port *lpp)
u8 offset = lpp->pcie_cap_ofst;

val = pcie_rc_cfg_rd(lpp, offset + PCI_EXP_LNKCAP);
- lpp->max_speed = FIELD_GET(PCI_EXP_LNKCAP_SLS, val);
lpp->max_width = FIELD_GET(PCI_EXP_LNKCAP_MLW, val);

val = pcie_rc_cfg_rd(lpp, offset + PCI_EXP_LNKCTL);
@@ -149,8 +146,9 @@ static void intel_pcie_link_setup(struct intel_pcie_port *lpp)
static void intel_pcie_port_logic_setup(struct intel_pcie_port *lpp)
{
u32 val, mask;
+ struct dw_pcie *pci = &lpp->pci;

- switch (pcie_link_speed[lpp->max_speed]) {
+ switch (pcie_link_speed[pci->link_gen]) {
case PCIE_SPEED_8_0GT:
lpp->n_fts = PORT_AFR_N_FTS_GEN3;
break;
@@ -179,7 +177,6 @@ static void intel_pcie_rc_setup(struct intel_pcie_port *lpp)
dw_pcie_setup_rc(&lpp->pci.pp);
dw_pcie_upconfig_setup(&lpp->pci);
intel_pcie_port_logic_setup(lpp);
- dw_pcie_link_set_max_speed(&lpp->pci, lpp->link_gen);
dw_pcie_link_set_n_fts(&lpp->pci, lpp->n_fts);
}

@@ -286,9 +283,6 @@ static int intel_pcie_get_resources(struct platform_device *pdev)
if (ret)
lpp->rst_intrvl = RESET_INTERVAL_MS;

- ret = of_pci_get_max_link_speed(dev->of_node);
- lpp->link_gen = ret < 0 ? 0 : ret;
-
lpp->app_base = devm_platform_ioremap_resource_byname(pdev, "app");
if (IS_ERR(lpp->app_base))
return PTR_ERR(lpp->app_base);
@@ -313,8 +307,9 @@ static int intel_pcie_wait_l2(struct intel_pcie_port *lpp)
{
u32 value;
int ret;
+ struct dw_pcie *pci = &lpp->pci;

- if (pcie_link_speed[lpp->max_speed] < PCIE_SPEED_8_0GT)
+ if (pci->link_gen < 3)
return 0;

/* Send PME_TURN_OFF message */
diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c
index d8d1fb7e0b8f..5eb28251dbee 100644
--- a/drivers/pci/controller/dwc/pcie-qcom.c
+++ b/drivers/pci/controller/dwc/pcie-qcom.c
@@ -189,7 +189,6 @@ struct qcom_pcie {
struct phy *phy;
struct gpio_desc *reset;
const struct qcom_pcie_ops *ops;
- int gen;
};

#define to_qcom_pcie(x) dev_get_drvdata((x)->dev)
@@ -390,12 +389,6 @@ static int qcom_pcie_init_2_1_0(struct qcom_pcie *pcie)
/* wait for clock acquisition */
usleep_range(1000, 1500);

- if (pcie->gen == 1) {
- val = readl(pci->dbi_base + PCIE20_LNK_CONTROL2_LINK_STATUS2);
- val |= PCI_EXP_LNKSTA_CLS_2_5GB;
- writel(val, pci->dbi_base + PCIE20_LNK_CONTROL2_LINK_STATUS2);
- }
-
/* Set the Max TLP size to 2K, instead of using default of 4K */
writel(CFG_REMOTE_RD_REQ_BRIDGE_SIZE_2K,
pci->dbi_base + PCIE20_AXI_MSTR_RESP_COMP_CTRL0);
@@ -1395,10 +1388,6 @@ static int qcom_pcie_probe(struct platform_device *pdev)
goto err_pm_runtime_put;
}

- pcie->gen = of_pci_get_max_link_speed(pdev->dev.of_node);
- if (pcie->gen < 0)
- pcie->gen = 2;
-
pcie->parf = devm_platform_ioremap_resource_byname(pdev, "parf");
if (IS_ERR(pcie->parf)) {
ret = PTR_ERR(pcie->parf);
diff --git a/drivers/pci/controller/dwc/pcie-spear13xx.c b/drivers/pci/controller/dwc/pcie-spear13xx.c
index 056c94541a22..0d8d0fe87f27 100644
--- a/drivers/pci/controller/dwc/pcie-spear13xx.c
+++ b/drivers/pci/controller/dwc/pcie-spear13xx.c
@@ -26,7 +26,6 @@ struct spear13xx_pcie {
void __iomem *app_base;
struct phy *phy;
struct clk *clk;
- bool is_gen1;
};

struct pcie_app_reg {
@@ -94,30 +93,6 @@ static int spear13xx_pcie_establish_link(struct spear13xx_pcie *spear13xx_pcie)
dw_pcie_write(pci->dbi_base + PCI_VENDOR_ID, 2, 0x104A);
dw_pcie_write(pci->dbi_base + PCI_DEVICE_ID, 2, 0xCD80);

- /*
- * if is_gen1 is set then handle it, so that some buggy card
- * also works
- */
- if (spear13xx_pcie->is_gen1) {
- dw_pcie_read(pci->dbi_base + exp_cap_off + PCI_EXP_LNKCAP,
- 4, &val);
- if ((val & PCI_EXP_LNKCAP_SLS) != PCI_EXP_LNKCAP_SLS_2_5GB) {
- val &= ~((u32)PCI_EXP_LNKCAP_SLS);
- val |= PCI_EXP_LNKCAP_SLS_2_5GB;
- dw_pcie_write(pci->dbi_base + exp_cap_off +
- PCI_EXP_LNKCAP, 4, val);
- }
-
- dw_pcie_read(pci->dbi_base + exp_cap_off + PCI_EXP_LNKCTL2,
- 2, &val);
- if ((val & PCI_EXP_LNKCAP_SLS) != PCI_EXP_LNKCAP_SLS_2_5GB) {
- val &= ~((u32)PCI_EXP_LNKCAP_SLS);
- val |= PCI_EXP_LNKCAP_SLS_2_5GB;
- dw_pcie_write(pci->dbi_base + exp_cap_off +
- PCI_EXP_LNKCTL2, 2, val);
- }
- }
-
/* enable ltssm */
writel(DEVICE_TYPE_RC | (1 << MISCTRL_EN_ID)
| (1 << APP_LTSSM_ENABLE_ID)
@@ -276,7 +251,7 @@ static int spear13xx_pcie_probe(struct platform_device *pdev)
spear13xx_pcie->app_base = pci->dbi_base + 0x2000;

if (of_property_read_bool(np, "st,pcie-is-gen1"))
- spear13xx_pcie->is_gen1 = true;
+ pci->link_gen = 1;

platform_set_drvdata(pdev, spear13xx_pcie);

diff --git a/drivers/pci/controller/dwc/pcie-tegra194.c b/drivers/pci/controller/dwc/pcie-tegra194.c
index f121ac25d418..91ef4b3e860d 100644
--- a/drivers/pci/controller/dwc/pcie-tegra194.c
+++ b/drivers/pci/controller/dwc/pcie-tegra194.c
@@ -284,7 +284,6 @@ struct tegra_pcie_dw {
u8 init_link_width;
u32 msi_ctrl_int;
u32 num_lanes;
- u32 max_speed;
u32 cid;
u32 cfg_link_cap_l1sub;
u32 pcie_cap_base;
@@ -900,16 +899,6 @@ static void tegra_pcie_prepare_host(struct pcie_port *pp)
AMBA_ERROR_RESPONSE_CRS_SHIFT);
dw_pcie_writel_dbi(pci, PORT_LOGIC_AMBA_ERROR_RESPONSE_DEFAULT, val);

- /* Configure Max Speed from DT */
- if (pcie->max_speed && pcie->max_speed != -EINVAL) {
- val = dw_pcie_readl_dbi(pci, pcie->pcie_cap_base +
- PCI_EXP_LNKCAP);
- val &= ~PCI_EXP_LNKCAP_SLS;
- val |= pcie->max_speed;
- dw_pcie_writel_dbi(pci, pcie->pcie_cap_base + PCI_EXP_LNKCAP,
- val);
- }
-
/* Configure Max lane width from DT */
val = dw_pcie_readl_dbi(pci, pcie->pcie_cap_base + PCI_EXP_LNKCAP);
val &= ~PCI_EXP_LNKCAP_MLW;
@@ -1119,8 +1108,6 @@ static int tegra_pcie_dw_parse_dt(struct tegra_pcie_dw *pcie)
return ret;
}

- pcie->max_speed = of_pci_get_max_link_speed(np);
-
ret = of_property_read_u32_index(np, "nvidia,bpmp", 1, &pcie->cid);
if (ret) {
dev_err(pcie->dev, "Failed to read Controller-ID: %d\n", ret);
@@ -1818,16 +1805,6 @@ static void pex_ep_event_pex_rst_deassert(struct tegra_pcie_dw *pcie)
val |= FTS_VAL;
dw_pcie_writel_dbi(pci, PCIE_LINK_WIDTH_SPEED_CONTROL, val);

- /* Configure Max Speed from DT */
- if (pcie->max_speed && pcie->max_speed != -EINVAL) {
- val = dw_pcie_readl_dbi(pci, pcie->pcie_cap_base +
- PCI_EXP_LNKCAP);
- val &= ~PCI_EXP_LNKCAP_SLS;
- val |= pcie->max_speed;
- dw_pcie_writel_dbi(pci, pcie->pcie_cap_base + PCI_EXP_LNKCAP,
- val);
- }
-
pcie->pcie_cap_base = dw_pcie_find_capability(&pcie->pci,
PCI_CAP_ID_EXP);
clk_set_rate(pcie->core_clk, GEN4_CORE_CLK_FREQ);
--
2.25.1