Re: [PATCH v7 3/4] PCI: dwc: kirin: add PCIe Driver for HiSilicon Kirin SoC
From: Bjorn Helgaas
Date: Tue May 30 2017 - 16:29:43 EST
Hi Xiaowei,
Several trivial cosmetic comments below.
On Thu, May 25, 2017 at 11:02:03AM +0800, Xiaowei Song wrote:
> Hisilicon PCIe Driver shares the common functions for PCIe dw-host
>
> The poweron functions is developed on hi3660 SoC,
> while Others Functions are common for Kirin series SoCs.
>
> Low power mode(L1 sub-state and Suspend/Resume), hotplug
Add space after "mode".
> and MSI feature are not supported currently.
>
> Cc: Guodong Xu <guodong.xu@xxxxxxxxxx>
> Signed-off-by: Xiaowei Song <songxiaowei@xxxxxxxxxxxxx>
> ---
> drivers/pci/dwc/Kconfig | 10 +
> drivers/pci/dwc/Makefile | 1 +
> drivers/pci/dwc/pcie-kirin.c | 513 +++++++++++++++++++++++++++++++++++++++++++
> 3 files changed, 524 insertions(+)
> create mode 100644 drivers/pci/dwc/pcie-kirin.c
>
> diff --git a/drivers/pci/dwc/Kconfig b/drivers/pci/dwc/Kconfig
> index d2d2ba5b8a68..13e617b78430 100644
> --- a/drivers/pci/dwc/Kconfig
> +++ b/drivers/pci/dwc/Kconfig
> @@ -130,4 +130,14 @@ config PCIE_ARTPEC6
> Say Y here to enable PCIe controller support on Axis ARTPEC-6
> SoCs. This PCIe controller uses the DesignWare core.
>
> +config PCIE_KIRIN
> + depends on OF && ARM64
> + bool "HiSilicon Kirin series SoCs PCIe controllers"
> + depends on PCI
> + select PCIEPORTBUS
> + select PCIE_DW_HOST
> + help
> + Say Y here if you want PCIe controller support on HiSilicon Kirin series SoCs
> + kirin960 SoC
Wrap the above so it fits in 80 columns. Not sure what the last
"kirin960 SoC" line means -- it doesn't seem to be part of the
sentence.
> +
> endmenu
> diff --git a/drivers/pci/dwc/Makefile b/drivers/pci/dwc/Makefile
> index a2df13c28798..4bd69bacd4ab 100644
> --- a/drivers/pci/dwc/Makefile
> +++ b/drivers/pci/dwc/Makefile
> @@ -10,6 +10,7 @@ obj-$(CONFIG_PCI_LAYERSCAPE) += pci-layerscape.o
> obj-$(CONFIG_PCIE_QCOM) += pcie-qcom.o
> obj-$(CONFIG_PCIE_ARMADA_8K) += pcie-armada8k.o
> obj-$(CONFIG_PCIE_ARTPEC6) += pcie-artpec6.o
> +obj-$(CONFIG_PCIE_KIRIN) += pcie-kirin.o
>
> # The following drivers are for devices that use the generic ACPI
> # pci_root.c driver but don't support standard ECAM config access.
> diff --git a/drivers/pci/dwc/pcie-kirin.c b/drivers/pci/dwc/pcie-kirin.c
> new file mode 100644
> index 000000000000..2fe3b226957b
> --- /dev/null
> +++ b/drivers/pci/dwc/pcie-kirin.c
> @@ -0,0 +1,513 @@
> +/*
> + * PCIe host controller driver for Kirin Phone SoCs
> + *
> + * Copyright (C) 2017 Hilisicon Electronics Co., Ltd.
> + * http://www.huawei.com
> + *
> + * Author: Xiaowei Song <songxiaowei@xxxxxxxxxx>
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 as
> + * published by the Free Software Foundation.
> + */
> +
> +#include <asm/compiler.h>
> +#include <linux/compiler.h>
> +#include <linux/clk.h>
> +#include <linux/delay.h>
> +#include <linux/err.h>
> +#include <linux/gpio.h>
> +#include <linux/interrupt.h>
> +#include <linux/mfd/syscon.h>
> +#include <linux/of_address.h>
> +#include <linux/of_gpio.h>
> +#include <linux/of_pci.h>
> +#include <linux/pci.h>
> +#include <linux/pci_regs.h>
> +#include <linux/platform_device.h>
> +#include <linux/regmap.h>
> +#include <linux/resource.h>
> +#include <linux/types.h>
> +#include "pcie-designware.h"
> +
> +#define to_kirin_pcie(x) dev_get_drvdata((x)->dev)
> +
> +#define REF_CLK_FREQ 100000000
> +
> +/* PCIe ELBI registers */
> +#define SOC_PCIECTRL_CTRL0_ADDR 0x000
> +#define SOC_PCIECTRL_CTRL1_ADDR 0x004
> +#define SOC_PCIEPHY_CTRL2_ADDR 0x008
> +#define SOC_PCIEPHY_CTRL3_ADDR 0x00c
Indent these all consistently.
> +#define PCIE_ELBI_SLV_DBI_ENABLE (0x1 << 21)
> +
> +#define PCIE_APP_LTSSM_ENABLE 0x01c
> +#define PCIE_APB_PHY_CTRL0 0x0
> +#define PCIE_APB_PHY_CTRL1 0x4
> +#define PCIE_APB_PHY_STATUS0 0x400
> +#define PCIE_LINKUP_ENABLE (0x8020)
> +#define PCIE_LTSSM_ENABLE_BIT (0x1 << 11)
> +#define PIPE_CLK_STABLE (0x1 << 19)
> +#define PIPE_CLK_MAX_TRY_TIMES 10
> +#define PHY_REF_PAD_BIT (0x1 << 8)
> +#define PHY_PWR_DOWN_BIT (0x1 << 22)
> +#define PHY_RST_ACK_BIT (0x1 << 16)
Indent these all consistently.
> +
> +/* info lacated in sysctrl */
s/lacated/located/
I mentioned this before.
> +#define SCTRL_PCIE_CMOS_OFFSET 0x60
> +#define SCTRL_PCIE_CMOS_BIT 0x10
> +#define SCTRL_PCIE_ISO_OFFSET 0x44
> +#define SCTRL_PCIE_ISO_BIT 0x30
> +#define SCTRL_PCIE_HPCLK_OFFSET 0x190
> +#define SCTRL_PCIE_HPCLK_BIT 0x184000
> +#define SCTRL_PCIE_OE_OFFSET 0x14a
> +#define PCIE_DEBOUNCE_PARAM 0xF0F400
> +#define PCIE_OE_BYPASS (0x3 << 28)
Indent these all consistently.
> +
> +/* peri_crg ctrl */
> +#define CRGCTRL_PCIE_ASSERT_OFFSET 0x88
> +#define CRGCTRL_PCIE_ASSERT_BIT 0x8c000000
Indent these all consistently.
> +
> +/* Time for delay */
> +#define REF_2_PERST_MIN 20000
> +#define REF_2_PERST_MAX 25000
> +#define PERST_2_ACCESS_MIN 10000
> +#define PERST_2_ACCESS_MAX 12000
> +#define LINK_WAIT_MIN 900
> +#define LINK_WAIT_MAX 1000
> +#define PIPE_CLK_WAIT_MIN 550
> +#define PIPE_CLK_WAIT_MAX 600
> +
> +struct kirin_pcie {
> + struct dw_pcie *pci;
> + void __iomem *apb_base;
> + void __iomem *phy_base;
> + struct regmap *crgctrl;
> + struct regmap *sysctrl;
> + struct clk *apb_sys_clk;
> + struct clk *apb_phy_clk;
> + struct clk *phy_ref_clk;
> + struct clk *pcie_aclk;
> + struct clk *pcie_aux_clk;
> + int gpio_id_reset;
Please indent the above so everything lines up. It's pretty random
now: two tabs before *pci, none before *crgctrl, three before the
clocks, and spaces before gpio_id_reset.
> +};
> +
> +static inline void kirin_apb_ctrl_writel(struct kirin_pcie *kirin_pcie,
> + u32 val, u32 reg)
> +{
> + writel(val, kirin_pcie->apb_base + reg);
> +}
> +
> +static inline u32 kirin_apb_ctrl_readl(struct kirin_pcie *kirin_pcie,
> + u32 reg)
This all fits in 80 columns, no need to wrap.
> +{
> + return readl(kirin_pcie->apb_base + reg);
> +}
> +
> +/*Registers in PCIePHY*/
Add spaces after "/*" and before "*/".
I mentioned this before, too.
Probably a space between "PCIe" and "PHY" as well.
> +static inline void kirin_apb_phy_writel(struct kirin_pcie *kirin_pcie,
> + u32 val, u32 reg)
> +{
> + writel(val, kirin_pcie->phy_base + reg);
> +}
> +
> +static inline u32 kirin_apb_phy_readl(struct kirin_pcie *kirin_pcie,
> + u32 reg)
This all fits in 80 columns, no need to wrap.
> +{
> + return readl(kirin_pcie->phy_base + reg);
> +}
> +
> +static int32_t kirin_pcie_get_clk(struct kirin_pcie *kirin_pcie,
Why are you using int32_t? PTR_ERR() returns a long, so that seems
like the obvious choice.
> + struct platform_device *pdev)
> +{
struct device *dev = &pdev->dev;
> + kirin_pcie->phy_ref_clk = devm_clk_get(&pdev->dev, "pcie_phy_ref");
Use "dev" instead of "&pdev->dev" here and below.
> + if (IS_ERR(kirin_pcie->phy_ref_clk))
> + return PTR_ERR(kirin_pcie->phy_ref_clk);
> +
> + kirin_pcie->pcie_aux_clk = devm_clk_get(&pdev->dev, "pcie_aux");
> + if (IS_ERR(kirin_pcie->pcie_aux_clk))
> + return PTR_ERR(kirin_pcie->pcie_aux_clk);
> +
> + kirin_pcie->apb_phy_clk = devm_clk_get(&pdev->dev, "pcie_apb_phy");
> + if (IS_ERR(kirin_pcie->apb_phy_clk))
> + return PTR_ERR(kirin_pcie->apb_phy_clk);
> +
> + kirin_pcie->apb_sys_clk = devm_clk_get(&pdev->dev, "pcie_apb_sys");
> + if (IS_ERR(kirin_pcie->apb_sys_clk))
> + return PTR_ERR(kirin_pcie->apb_sys_clk);
> +
> + kirin_pcie->pcie_aclk = devm_clk_get(&pdev->dev, "pcie_aclk");
> + if (IS_ERR(kirin_pcie->pcie_aclk))
> + return PTR_ERR(kirin_pcie->pcie_aclk);
> +
> + return 0;
> +}
> +
> +static int32_t kirin_pcie_get_resource(struct kirin_pcie *kirin_pcie,
Why int32_t?
> + struct platform_device *pdev)
> +{
struct device *dev = &pdev->dev;
> + struct resource *apb;
> + struct resource *phy;
> + struct resource *dbi;
> +
> + apb = platform_get_resource_byname(pdev, IORESOURCE_MEM, "apb");
> + kirin_pcie->apb_base = devm_ioremap_resource(&pdev->dev, apb);
Use "dev" instead of "&pdev->dev" here and below.
> + if (IS_ERR(kirin_pcie->apb_base))
> + return PTR_ERR(kirin_pcie->apb_base);
> +
> + phy = platform_get_resource_byname(pdev, IORESOURCE_MEM, "phy");
> + kirin_pcie->phy_base = devm_ioremap_resource(&pdev->dev, phy);
> + if (IS_ERR(kirin_pcie->phy_base))
> + return PTR_ERR(kirin_pcie->phy_base);
> +
> + dbi = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dbi");
> + kirin_pcie->pci->dbi_base = devm_ioremap_resource(&pdev->dev, dbi);
> + if (IS_ERR(kirin_pcie->pci->dbi_base))
> + return PTR_ERR(kirin_pcie->pci->dbi_base);
> +
> + kirin_pcie->crgctrl =
> + syscon_regmap_lookup_by_compatible("hisilicon,hi3660-crgctrl");
> + if (IS_ERR(kirin_pcie->crgctrl))
> + return PTR_ERR(kirin_pcie->crgctrl);
> +
> + kirin_pcie->sysctrl =
> + syscon_regmap_lookup_by_compatible("hisilicon,hi3660-sctrl");
> + if (IS_ERR(kirin_pcie->sysctrl))
> + return PTR_ERR(kirin_pcie->sysctrl);
> +
> + return 0;
> +}
> +
> +static int kirin_pcie_phy_init(struct kirin_pcie *kirin_pcie)
> +{
> + u32 reg_val;
> + u32 time = PIPE_CLK_MAX_TRY_TIMES;
> +
> + reg_val = kirin_apb_phy_readl(kirin_pcie, PCIE_APB_PHY_CTRL1);
> + reg_val &= ~PHY_REF_PAD_BIT;
> + kirin_apb_phy_writel(kirin_pcie, reg_val, PCIE_APB_PHY_CTRL1);
> +
> + reg_val = kirin_apb_phy_readl(kirin_pcie, PCIE_APB_PHY_CTRL0);
> + reg_val &= ~PHY_PWR_DOWN_BIT;
> + kirin_apb_phy_writel(kirin_pcie, reg_val, PCIE_APB_PHY_CTRL0);
> + udelay(10);
> +
> + reg_val = kirin_apb_phy_readl(kirin_pcie, PCIE_APB_PHY_CTRL1);
> + reg_val &= ~PHY_RST_ACK_BIT;
> + kirin_apb_phy_writel(kirin_pcie, reg_val, PCIE_APB_PHY_CTRL1);
> +
> + usleep_range(PIPE_CLK_WAIT_MIN, PIPE_CLK_WAIT_MAX);
> + reg_val = kirin_apb_phy_readl(kirin_pcie, PCIE_APB_PHY_STATUS0);
> + if (reg_val & PIPE_CLK_STABLE) {
> + dev_err(kirin_pcie->pci->dev, "PIPE clk is not stable\n");
> + return -EINVAL;
> + }
> +
> + return 0;
> +}
> +
> +static void kirin_pcie_oe_enable(struct kirin_pcie *kirin_pcie)
> +{
> + u32 val;
> +
> + regmap_read(kirin_pcie->sysctrl, SCTRL_PCIE_OE_OFFSET, &val);
> + val |= PCIE_DEBOUNCE_PARAM;
> + val &= ~PCIE_OE_BYPASS;
> + regmap_write(kirin_pcie->sysctrl, SCTRL_PCIE_OE_OFFSET, val);
> +}
> +
> +static int kirin_pcie_clk_ctrl(struct kirin_pcie *kirin_pcie, bool enable)
> +{
> + int ret = 0;
> +
> + if (!enable)
> + goto close_clk;
> +
> + ret = clk_set_rate(kirin_pcie->phy_ref_clk, REF_CLK_FREQ);
> + if (ret)
> + return ret;
> +
> + ret = clk_prepare_enable(kirin_pcie->phy_ref_clk);
> + if (ret)
> + return ret;
> +
> + ret = clk_prepare_enable(kirin_pcie->apb_sys_clk);
> + if (ret)
> + goto apb_sys_fail;
> +
> + ret = clk_prepare_enable(kirin_pcie->apb_phy_clk);
> + if (ret)
> + goto apb_phy_fail;
> +
> + ret = clk_prepare_enable(kirin_pcie->pcie_aclk);
> + if (ret)
> + goto aclk_fail;
> +
> + ret = clk_prepare_enable(kirin_pcie->pcie_aux_clk);
> + if (ret)
> + goto aux_clk_fail;
> +
> + return 0;
> +
> +close_clk:
> + clk_disable_unprepare(kirin_pcie->pcie_aux_clk);
> +aux_clk_fail:
> + clk_disable_unprepare(kirin_pcie->pcie_aclk);
> +aclk_fail:
> + clk_disable_unprepare(kirin_pcie->apb_phy_clk);
> +apb_phy_fail:
> + clk_disable_unprepare(kirin_pcie->apb_sys_clk);
> +apb_sys_fail:
> + clk_disable_unprepare(kirin_pcie->phy_ref_clk);
> +
> + return ret;
> +}
> +
> +static int kirin_pcie_power_on(struct kirin_pcie *kirin_pcie)
> +{
> + int ret;
> +
> + /* Power supply for Host */
> + regmap_write(kirin_pcie->sysctrl,
> + SCTRL_PCIE_CMOS_OFFSET, SCTRL_PCIE_CMOS_BIT);
> + udelay(100);
> + kirin_pcie_oe_enable(kirin_pcie);
> +
> + ret = kirin_pcie_clk_ctrl(kirin_pcie, true);
> + if (ret)
> + return ret;
> +
> + /* ISO disable, PCIeCtrl,PHY assert and clk gate clear */
Add space after ","
> + regmap_write(kirin_pcie->sysctrl,
> + SCTRL_PCIE_ISO_OFFSET, SCTRL_PCIE_ISO_BIT);
> + regmap_write(kirin_pcie->crgctrl,
> + CRGCTRL_PCIE_ASSERT_OFFSET, CRGCTRL_PCIE_ASSERT_BIT);
> + regmap_write(kirin_pcie->sysctrl,
> + SCTRL_PCIE_HPCLK_OFFSET, SCTRL_PCIE_HPCLK_BIT);
> +
> + ret = kirin_pcie_phy_init(kirin_pcie);
> + if (ret)
> + goto close_clk;
> +
> + /* perst assert Endpoint */
> + if (!gpio_request(kirin_pcie->gpio_id_reset, "pcie_perst")) {
> + usleep_range(REF_2_PERST_MIN, REF_2_PERST_MAX);
> + ret = gpio_direction_output(kirin_pcie->gpio_id_reset, 1);
> + if (ret)
> + goto close_clk;
> + usleep_range(PERST_2_ACCESS_MIN, PERST_2_ACCESS_MAX);
> +
> + return 0;
> + }
> +
> +close_clk:
> + kirin_pcie_clk_ctrl(kirin_pcie, false);
> + return ret;
> +}
> +
> +static void kirin_pcie_sideband_dbi_w_mode(struct kirin_pcie *kirin_pcie,
> + bool on)
> +{
> + u32 val;
> +
> + val = kirin_apb_ctrl_readl(kirin_pcie, SOC_PCIECTRL_CTRL0_ADDR);
> + if (on)
> + val = val | PCIE_ELBI_SLV_DBI_ENABLE;
> + else
> + val = val & ~PCIE_ELBI_SLV_DBI_ENABLE;
> +
> + kirin_apb_ctrl_writel(kirin_pcie, val, SOC_PCIECTRL_CTRL0_ADDR);
> +}
> +
> +static void kirin_pcie_sideband_dbi_r_mode(struct kirin_pcie *kirin_pcie,
> + bool on)
> +{
> + u32 val;
> +
> + val = kirin_apb_ctrl_readl(kirin_pcie, SOC_PCIECTRL_CTRL1_ADDR);
> + if (on)
> + val = val | PCIE_ELBI_SLV_DBI_ENABLE;
> + else
> + val = val & ~PCIE_ELBI_SLV_DBI_ENABLE;
> +
> + kirin_apb_ctrl_writel(kirin_pcie, val, SOC_PCIECTRL_CTRL1_ADDR);
> +}
> +
> +static int kirin_pcie_rd_own_conf(struct pcie_port *pp,
> + int where, int size, u32 *val)
> +{
> + struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
> + struct kirin_pcie *kirin_pcie = to_kirin_pcie(pci);
> + int ret;
> +
> + kirin_pcie_sideband_dbi_r_mode(kirin_pcie, true);
> + ret = dw_pcie_read(pci->dbi_base + where, size, val);
> + kirin_pcie_sideband_dbi_r_mode(kirin_pcie, false);
> +
> + return ret;
> +}
> +
> +static int kirin_pcie_wr_own_conf(struct pcie_port *pp,
> + int where, int size, u32 val)
> +{
> + int ret;
> + struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
> + struct kirin_pcie *kirin_pcie = to_kirin_pcie(pci);
Reorder local variable declarations as above in
kirin_pcie_rd_own_conf(). Also fix similar declarations in functions
below, so "pci" and "kirin_pcie" are initialized first.
> + kirin_pcie_sideband_dbi_w_mode(kirin_pcie, true);
> + ret = dw_pcie_write(pci->dbi_base + where, size, val);
> + kirin_pcie_sideband_dbi_w_mode(kirin_pcie, false);
> +
> + return ret;
> +}
> +
> +static u32 kirin_pcie_read_dbi(struct dw_pcie *pci, void __iomem *base,
> + u32 reg, size_t size)
> +{
> + u32 ret;
> + struct kirin_pcie *kirin_pcie = to_kirin_pcie(pci);
> +
> + kirin_pcie_sideband_dbi_r_mode(kirin_pcie, true);
> + dw_pcie_read(base + reg, size, &ret);
> + kirin_pcie_sideband_dbi_r_mode(kirin_pcie, false);
> +
> + return ret;
> +}
> +
> +static void kirin_pcie_write_dbi(struct dw_pcie *pci, void __iomem *base,
> + u32 reg, size_t size, u32 val)
> +{
> + struct kirin_pcie *kirin_pcie = to_kirin_pcie(pci);
> +
> + kirin_pcie_sideband_dbi_w_mode(kirin_pcie, true);
> + dw_pcie_write(base + reg, size, val);
> + kirin_pcie_sideband_dbi_w_mode(kirin_pcie, false);
> +}
> +
> +static int kirin_pcie_link_up(struct dw_pcie *pci)
> +{
> + struct kirin_pcie *kirin_pcie = to_kirin_pcie(pci);
> + u32 val = kirin_apb_ctrl_readl(kirin_pcie, PCIE_APB_PHY_STATUS0);
> +
> + if ((val & PCIE_LINKUP_ENABLE) == PCIE_LINKUP_ENABLE)
> + return 1;
> +
> + return 0;
> +}
> +
> +static int kirin_pcie_establish_link(struct pcie_port *pp)
> +{
> + int count = 0;
> +
Remove blank line above.
> + struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
> + struct kirin_pcie *kirin_pcie = to_kirin_pcie(pci);
> +
> + if (kirin_pcie_link_up(pci))
> + return 0;
> +
> + dw_pcie_setup_rc(pp);
> +
> + /* assert LTSSM enable */
> + kirin_apb_ctrl_writel(kirin_pcie, PCIE_LTSSM_ENABLE_BIT,
> + PCIE_APP_LTSSM_ENABLE);
> +
> + /* check if the link is up or not */
> + while (!kirin_pcie_link_up(pci)) {
> + usleep_range(LINK_WAIT_MIN, LINK_WAIT_MAX);
> + count++;
> + if (count == 1000) {
> + dev_err(pci->dev, "Link Fail\n");
> + return -EINVAL;
> + }
> + }
> +
> + return 0;
> +}
> +
> +static void kirin_pcie_host_init(struct pcie_port *pp)
> +{
> + kirin_pcie_establish_link(pp);
> +}
> +
> +static struct dw_pcie_ops kirin_dw_pcie_ops = {
> + .read_dbi = kirin_pcie_read_dbi,
> + .write_dbi = kirin_pcie_write_dbi,
> + .link_up = kirin_pcie_link_up,
> +};
> +
> +static struct dw_pcie_host_ops kirin_pcie_host_ops = {
> + .rd_own_conf = kirin_pcie_rd_own_conf,
> + .wr_own_conf = kirin_pcie_wr_own_conf,
> + .host_init = kirin_pcie_host_init,
> +};
> +
> +static int __init kirin_add_pcie_port(struct dw_pcie *pci,
> + struct platform_device *pdev)
> +{
> + pci->pp.ops = &kirin_pcie_host_ops;
> +
> + return dw_pcie_host_init(&pci->pp);
> +}
> +
> +static int kirin_pcie_probe(struct platform_device *pdev)
> +{
> + struct kirin_pcie *kirin_pcie;
> + struct dw_pcie *pci;
> + struct device *dev = &pdev->dev;
> + int ret;
> +
> + if (!pdev->dev.of_node) {
Use "dev" instead of "&pdev->dev" here.
> + dev_err(&pdev->dev, "NULL node\n");
And here.
> + return -EINVAL;
> + }
> +
> + kirin_pcie = devm_kzalloc(&pdev->dev,
And here.
> + sizeof(struct kirin_pcie), GFP_KERNEL);
> + if (!kirin_pcie)
> + return -ENOMEM;
> +
> + pci = devm_kzalloc(dev, sizeof(*pci), GFP_KERNEL);
> + if (!pci)
> + return -ENOMEM;
> +
> + pci->dev = dev;
> + pci->ops = &kirin_dw_pcie_ops;
> + kirin_pcie->pci = pci;
> +
> + ret = kirin_pcie_get_clk(kirin_pcie, pdev);
> + if (ret)
> + return ret;
> +
> + ret = kirin_pcie_get_resource(kirin_pcie, pdev);
> + if (ret)
> + return ret;
> +
> + kirin_pcie->gpio_id_reset = of_get_named_gpio(pdev->dev.of_node,
And here.
> + "reset-gpio", 0);
> + if (kirin_pcie->gpio_id_reset < 0)
> + return -ENODEV;
> +
> + ret = kirin_pcie_power_on(kirin_pcie);
> + if (ret)
> + return ret;
> +
> + platform_set_drvdata(pdev, kirin_pcie);
> +
> + return kirin_add_pcie_port(pci, pdev);
> +}
> +
> +static const struct of_device_id kirin_pcie_match[] = {
> + { .compatible = "hisilicon,kirin960-pcie" },
> + {},
> +};
> +
> +struct platform_driver kirin_pcie_driver = {
> + .probe = kirin_pcie_probe,
> + .driver = {
> + .name = "kirin-pcie",
> + .of_match_table = kirin_pcie_match,
> + .suppress_bind_attrs = true,
> + },
> +};
> +
> +builtin_platform_driver(kirin_pcie_driver);
> --
> 2.11.GIT
>