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Commit c1da4dfc authored by Vivek Pernamitta's avatar Vivek Pernamitta Committed by Gerrit - the friendly Code Review server
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msm: pci: Configure clkreq gpio wakeup capability at runtime 



By default pinctrl driver is disabling wakeup capability for gpios
for which interrupt is not registered. This could cause wakeup from
L1SS sleep not working. Hence fix it by enabling/disabling wakeup
capability for clkreq gpio as part of DRV suspend/resume handling.

Change-Id: If8fcb0a3a638c560bfe1f614aa00b7fd872c6b98
Signed-off-by: default avatarVivek Pernamitta <vpernami@codeaurora.org>
Signed-off-by: default avatarVijayavardhan Vennapusa <vvreddy@codeaurora.org>
parent c728c09e

drivers/pci/controller/pci-msm.c

+16 −0
Original line number Diff line number Diff line
@@ -36,6 +36,7 @@ 
#include <linux/types.h>

#include <linux/uaccess.h>

#include <soc/qcom/subsystem_notif.h>

#include <linux/pinctrl/qcom-pinctrl.h>



#include "../pci.h"
@@ -764,6 +765,7 @@ struct msm_pcie_dev_t { 
	uint32_t gpio_n;

	uint32_t parf_deemph;

	uint32_t parf_swing;

	uint32_t clkreq_gpio;



	struct msm_pcie_vreg_info_t *cx_vreg;

	struct msm_pcie_clk_info_t *rate_change_clk;
@@ -6266,6 +6268,12 @@ static int msm_pcie_probe(struct platform_device *pdev) 
		PCIE_DBG(pcie_dev, "RC%d: aux clock frequency: %d.\n",

			pcie_dev->rc_idx, pcie_dev->aux_clk_freq);



	of_property_read_u32(of_node, "qcom,clkreq-gpio",

			&pcie_dev->clkreq_gpio);



	PCIE_DBG(pcie_dev, "RC%d: clkreq gpio no:%u\n",

			pcie_dev->rc_idx, pcie_dev->clkreq_gpio);



	pcie_dev->shadow_en = true;

	pcie_dev->aer_enable = true;
@@ -7725,6 +7733,10 @@ static int msm_pcie_drv_resume(struct msm_pcie_dev_t *pcie_dev) 
	PCIE_DBG(pcie_dev, "PCIe RC%d: LTSSM_STATE: %s\n",

		pcie_dev->rc_idx, TO_LTSSM_STR(val & 0x3f));



	msm_gpio_mpm_wake_set(pcie_dev->clkreq_gpio, false);



	PCIE_DBG(pcie_dev, "PCIe: RC%d: disable wake up cap for CLKREQ GPIO\n",

		pcie_dev->rc_idx);

	mutex_unlock(&pcie_dev->setup_lock);

	mutex_unlock(&pcie_dev->recovery_lock);
@@ -7747,6 +7759,10 @@ static int msm_pcie_drv_suspend(struct msm_pcie_dev_t *pcie_dev, 
	}



	mutex_lock(&pcie_dev->recovery_lock);

	msm_gpio_mpm_wake_set(pcie_dev->clkreq_gpio, true);



	PCIE_DBG(pcie_dev, "PCIe: RC%d:Enable wake up cap for CLKREQ GPIO\n",

		pcie_dev->rc_idx);



	/* disable global irq - no more linkdown/aer detection */

	disable_irq(pcie_dev->irq[MSM_PCIE_INT_GLOBAL_INT].num);