Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit ba27e690 authored by Hamad Kadmany's avatar Hamad Kadmany
Browse files

msm_11ad: Add option to enable sleep clock 



Sleep clock may be used by 11ad chip to support
low power modes.

Change-Id: I00c9c5f3d24fa47463f5d0fe4aecc97ab09334b9
Signed-off-by: default avatarHamad Kadmany <hkadmany@codeaurora.org>
parent 62eb03b5

Documentation/devicetree/bindings/arm/msm/wil6210.txt

+3 −0
Original line number Diff line number Diff line
@@ -19,6 +19,9 @@ Required properties: 
	- qcom,msm-bus,num-paths

	- qcom,msm-bus,vectors-KBps



Optional properties:

- qcom,sleep-clk-en: GPIO for sleep clock used for low power modes by 11ad card



Example:

	wil6210: qcom,wil6210 {

		compatible = "qcom,wil6210";

drivers/platform/msm/msm_11ad/msm_11ad.c

+42 −4
Original line number Diff line number Diff line
@@ -37,11 +37,13 @@ 
struct device;



static const char * const gpio_en_name = "qcom,wigig-en";

static const char * const sleep_clk_en_name = "qcom,sleep-clk-en";



struct msm11ad_ctx {

	struct list_head list;

	struct device *dev; /* for platform device */

	int gpio_en; /* card enable */

	int sleep_clk_en; /* sleep clock enable for low PM management */



	/* pci device */

	u32 rc_index; /* PCIE root complex index */
@@ -95,6 +97,9 @@ static int ops_suspend(void *handle) 
		return rc;

	}

	gpio_direction_output(ctx->gpio_en, 0);



	if (ctx->sleep_clk_en >= 0)

		gpio_direction_output(ctx->sleep_clk_en, 0);

	return rc;

}
@@ -110,6 +115,9 @@ static int ops_resume(void *handle) 
		return -ENODEV;

	}



	if (ctx->sleep_clk_en >= 0)

		gpio_direction_output(ctx->sleep_clk_en, 1);



	pcidev = ctx->pcidev;

	gpio_direction_output(ctx->gpio_en, 1);

	msleep(WIGIG_ENABLE_DELAY);
@@ -119,15 +127,25 @@ static int ops_resume(void *handle) 
	if (rc) {

		dev_err(ctx->dev, "msm_pcie_pm_control(RESUME) failed :%d\n",

			rc);

		return rc;

		goto err_disable_power;

	}

	rc = msm_pcie_recover_config(pcidev);

	if (rc) {

		dev_err(ctx->dev, "msm_pcie_recover_config failed :%d\n",

			rc);

		return rc;

		goto err_suspend_rc;

	}



	return 0;



err_suspend_rc:

	msm_pcie_pm_control(MSM_PCIE_SUSPEND, pcidev->bus->number,

			    pcidev, NULL, PM_OPT_SUSPEND);

err_disable_power:

	gpio_direction_output(ctx->gpio_en, 0);



	if (ctx->sleep_clk_en >= 0)

		gpio_direction_output(ctx->sleep_clk_en, 0);

	return rc;

}
@@ -206,6 +224,7 @@ static int msm_11ad_probe(struct platform_device *pdev) 
	 *	compatible = "qcom,wil6210";

	 *	qcom,pcie-parent = <&pcie1>;

	 *	qcom,wigig-en = <&tlmm 94 0>; (ctx->gpio_en)

	 *	qcom,sleep-clk-en = <&pm8994_gpios 18 0>; (ctx->sleep_clk_en)

	 *	qcom,msm-bus,name = "wil6210";

	 *	qcom,msm-bus,num-cases = <2>;

	 *	qcom,msm-bus,num-paths = <1>;
@@ -224,6 +243,10 @@ static int msm_11ad_probe(struct platform_device *pdev) 
		dev_err(ctx->dev, "GPIO <%s> not found\n", gpio_en_name);

		return ctx->gpio_en;

	}

	ctx->sleep_clk_en = of_get_named_gpio(of_node, sleep_clk_en_name, 0);

	if (ctx->sleep_clk_en < 0)

		dev_warn(ctx->dev, "GPIO <%s> not found, sleep clock not used\n",

			 sleep_clk_en_name);

	rc_node = of_parse_phandle(of_node, "qcom,pcie-parent", 0);

	if (!rc_node) {

		dev_err(ctx->dev, "Parent PCIE device not found\n");
@@ -283,14 +306,27 @@ static int msm_11ad_probe(struct platform_device *pdev) 
	}

	ctx->pristine_state = pci_store_saved_state(pcidev);



	if (ctx->sleep_clk_en >= 0) {

		rc = gpio_request(ctx->sleep_clk_en, "msm_11ad");

		if (rc < 0) {

			dev_err(ctx->dev,

				"failed to request GPIO %d <%s>, sleep clock disabled\n",

				ctx->sleep_clk_en, sleep_clk_en_name);

			ctx->sleep_clk_en = -EINVAL;

		} else {

			gpio_direction_output(ctx->sleep_clk_en, 0);

		}

	}



	/* report */

	dev_info(ctx->dev, "msm_11ad discovered. %p {\n"

		 "  gpio_en = %d\n"

		 "  sleep_clk_en = %d\n"

		 "  rc_index = %d\n"

		 "  use_smmu = %d\n"

		 "  pcidev = %p\n"

		 "}\n", ctx, ctx->gpio_en, ctx->rc_index, ctx->use_smmu,

		 ctx->pcidev);

		 "}\n", ctx, ctx->gpio_en, ctx->sleep_clk_en, ctx->rc_index,

		 ctx->use_smmu, ctx->pcidev);



	platform_set_drvdata(pdev, ctx);
@@ -320,6 +356,8 @@ static int msm_11ad_remove(struct platform_device *pdev) 
	pci_dev_put(ctx->pcidev);

	gpio_direction_output(ctx->gpio_en, 0);

	gpio_free(ctx->gpio_en);

	if (ctx->sleep_clk_en >= 0)

		gpio_free(ctx->sleep_clk_en);

	return 0;

}