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Commit 4df3496e authored by Yan He's avatar Yan He
Browse files

msm: ep_pcie: add the support of MDM2AP GPIO 



Add the support of MDM2AP GPIO so that MDM can notify AP about
updated status.

Change-Id: Ia5a020898d4d04dcd4fec6b3928aba380663ac56
Signed-off-by: default avatarYan He <yanhe@codeaurora.org>
parent 22772af9

Documentation/devicetree/bindings/pci/msm_ep_pcie.txt

+3 −1
Original line number Original line Diff line number Diff line
@@ -45,6 +45,7 @@ Optional Properties: 
  - qcom,pcie-active-config: boolean type; active configuration of PCIe

  - qcom,pcie-active-config: boolean type; active configuration of PCIe

    addressing.

    addressing.

  - qcom,pcie-aggregated-irq: boolean type; interrupts are aggregated.

  - qcom,pcie-aggregated-irq: boolean type; interrupts are aggregated.

  - mdm2apstatus-gpio: GPIO used by PCIe endpoint side to notify the host side.

  - Refer to "Documentation/devicetree/bindings/arm/msm/msm_bus.txt" for

  - Refer to "Documentation/devicetree/bindings/arm/msm/msm_bus.txt" for

    below optional properties:

    below optional properties:

	- qcom,msm-bus,name

	- qcom,msm-bus,name
@@ -83,6 +84,7 @@ Example: 
		perst-gpio = <&msmgpio 65 0>;

		perst-gpio = <&msmgpio 65 0>;

		wake-gpio = <&msmgpio 61 0>;

		wake-gpio = <&msmgpio 61 0>;

		clkreq-gpio = <&msmgpio 64 0>;

		clkreq-gpio = <&msmgpio 64 0>;

		mdm2apstatus-gpio = <&tlmm_pinmux 16 0>;





		gdsc-vdd-supply = <&gdsc_pcie_0>;

		gdsc-vdd-supply = <&gdsc_pcie_0>;

		vreg-1.8-supply = <&pmd9635_l8>;

		vreg-1.8-supply = <&pmd9635_l8>;

drivers/platform/msm/ep_pcie/ep_pcie_com.h

+1 −0
Original line number Original line Diff line number Diff line
@@ -212,6 +212,7 @@ enum ep_pcie_gpio { 
	EP_PCIE_GPIO_PERST,

	EP_PCIE_GPIO_PERST,

	EP_PCIE_GPIO_WAKE,

	EP_PCIE_GPIO_WAKE,

	EP_PCIE_GPIO_CLKREQ,

	EP_PCIE_GPIO_CLKREQ,

	EP_PCIE_GPIO_MDM2AP,

	EP_PCIE_MAX_GPIO,

	EP_PCIE_MAX_GPIO,

};

};

drivers/platform/msm/ep_pcie/ep_pcie_core.c

+23 −2
Original line number Original line Diff line number Diff line
@@ -53,7 +53,8 @@ static struct ep_pcie_vreg_info_t ep_pcie_vreg_info[EP_PCIE_MAX_VREG] = { 
static struct ep_pcie_gpio_info_t ep_pcie_gpio_info[EP_PCIE_MAX_GPIO] = {

static struct ep_pcie_gpio_info_t ep_pcie_gpio_info[EP_PCIE_MAX_GPIO] = {

	{"perst-gpio",      0, 0, 0, 1},

	{"perst-gpio",      0, 0, 0, 1},

	{"wake-gpio",       0, 1, 0, 1},

	{"wake-gpio",       0, 1, 0, 1},

	{"clkreq-gpio",     0, 1, 0, 0}

	{"clkreq-gpio",     0, 1, 0, 0},

	{"mdm2apstatus-gpio",    0, 1, 1, 0}

};

};





static struct ep_pcie_clk_info_t

static struct ep_pcie_clk_info_t
@@ -775,7 +776,9 @@ static int ep_pcie_get_resources(struct ep_pcie_dev_t *dev, 
			EP_PCIE_DBG(dev, "GPIO num for %s is %d\n",

			EP_PCIE_DBG(dev, "GPIO num for %s is %d\n",

				gpio_info->name, gpio_info->num);

				gpio_info->name, gpio_info->num);

		} else {

		} else {

			goto out;

			EP_PCIE_DBG(dev,

				"GPIO %s is not supported in this configuration.\n",

				gpio_info->name);

		}

		}

	}

	}
@@ -1135,6 +1138,24 @@ int ep_pcie_core_enable_endpoint(enum ep_pcie_options opt) 
			"PCIe V%d: PCIe link is up and BME is enabled after %d checkings (%d ms).\n",

			"PCIe V%d: PCIe link is up and BME is enabled after %d checkings (%d ms).\n",

			dev->rev, retries,

			dev->rev, retries,

			BME_TIMEOUT_US_MIN * retries / 1000);

			BME_TIMEOUT_US_MIN * retries / 1000);



		if (dev->gpio[EP_PCIE_GPIO_MDM2AP].num) {

			/* assert MDM2AP Status GPIO */

			EP_PCIE_DBG2(dev, "PCIe V%d: assert MDM2AP Status .\n",

				dev->rev);

			EP_PCIE_DBG(dev,

				"PCIe V%d: MDM2APStatus GPIO initial:%d.\n",

				dev->rev,

				gpio_get_value(

					dev->gpio[EP_PCIE_GPIO_MDM2AP].num));

			gpio_set_value(dev->gpio[EP_PCIE_GPIO_MDM2AP].num,

					dev->gpio[EP_PCIE_GPIO_MDM2AP].on);

			EP_PCIE_DBG(dev,

				"PCIe V%d: MDM2APStatus GPIO after assertion:%d.\n",

				dev->rev,

				gpio_get_value(

					dev->gpio[EP_PCIE_GPIO_MDM2AP].num));

		}

	} else {

	} else {

		EP_PCIE_ERR(dev,

		EP_PCIE_ERR(dev,

			"PCIe V%d: PCIe link is up but BME is still disabled after max waiting time.\n",

			"PCIe V%d: PCIe link is up but BME is still disabled after max waiting time.\n",