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Commit 0106d828 authored by Prasanna Kumar Thoorvas Samyrao Muralidharan's avatar Prasanna Kumar Thoorvas Samyrao Muralidharan Committed by Karthick Shanmugham
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soc: qcom: sdx_ext_ipc: Change GPIO configuration 



Changing GPIO output value is not reflecting. Change GPIO pull up
configuration from pull up to no pull to reflect state change.

Change-Id: Iac636b9b601b9819ee7aac2118c1af3b0f864e86
Signed-off-by: default avatarPrasanna Kumar Thoorvas Samyrao Muralidharan <ptsm@codeaurora.org>
parent a72d52e9

drivers/soc/qcom/sdx_ext_ipc.c

+48 −7
Original line number Diff line number Diff line
@@ -14,6 +14,12 @@ 
#include <linux/suspend.h>

#include <soc/qcom/sb_notification.h>



#define GPIO_BASE 0xf100000

#define GPIO_REG_OFFSET 0x1000

#define GPIO_REG_SIZE 0x300000



#define E911_GPIO_NUMBER 45



#define STATUS_UP 1

#define STATUS_DOWN 0
@@ -49,6 +55,8 @@ struct gpio_cntrl { 
	int status_irq;

	int wakeup_irq;

	int policy;

	unsigned int ipq807x_attach;

	void __iomem *gpio_base;

	struct device *dev;

	struct mutex policy_lock;

	struct mutex e911_lock;
@@ -114,15 +122,27 @@ static DEVICE_ATTR_RW(policy); 
static ssize_t e911_show(struct device *dev, struct device_attribute *attr,

				char *buf)

{

	int ret, state;

	int ret;

	u32 state;

	struct gpio_cntrl *mdm = dev_get_drvdata(dev);

	void __iomem *addr = NULL;



	if (mdm->gpios[STATUS_OUT2] < 0)

		return -ENXIO;



	mutex_lock(&mdm->e911_lock);



	if (mdm->ipq807x_attach) {

		addr = mdm->gpio_base + GPIO_REG_OFFSET * E911_GPIO_NUMBER;

		state = readl_relaxed(addr);

		if (state == 0x3c7)

			ret = scnprintf(buf, 2, "1\n");

		else

			ret = scnprintf(buf, 2, "0\n");

	} else {

		state = gpio_get_value(mdm->gpios[STATUS_OUT2]);

		ret = scnprintf(buf, 2, "%d\n", state);

	}

	mutex_unlock(&mdm->e911_lock);



	return ret;
@@ -132,6 +152,7 @@ static ssize_t e911_store(struct device *dev, struct device_attribute *attr, 
				const char *buf, size_t count)

{

	struct gpio_cntrl *mdm = dev_get_drvdata(dev);

	void __iomem *addr = NULL;

	int e911;



	if (kstrtoint(buf, 0, &e911))
@@ -141,10 +162,19 @@ static ssize_t e911_store(struct device *dev, struct device_attribute *attr, 
		return -ENXIO;



	mutex_lock(&mdm->e911_lock);



	if (mdm->ipq807x_attach) {

		addr = mdm->gpio_base + GPIO_REG_OFFSET * E911_GPIO_NUMBER;

		if (e911)

			writel_relaxed(0x3c7, addr);

		else

			writel_relaxed(0x4, addr);

	} else {

		if (e911)

			gpio_set_value(mdm->gpios[STATUS_OUT2], 1);

		else

			gpio_set_value(mdm->gpios[STATUS_OUT2], 0);

	}

	mutex_unlock(&mdm->e911_lock);



	return count;
@@ -297,6 +327,7 @@ static int setup_ipc(struct gpio_cntrl *mdm) 
static int sdx_ext_ipc_panic(struct notifier_block *this,

				unsigned long event, void *ptr)

{

	void __iomem *addr = NULL;

	struct gpio_cntrl *mdm = container_of(this,

					struct gpio_cntrl, panic_blk);
@@ -323,6 +354,13 @@ static int sdx_ext_ipc_probe(struct platform_device *pdev) 
		return -ENOMEM;



	mdm->dev = &pdev->dev;



	of_property_read_u32(node, "ipq807x_attach", &mdm->ipq807x_attach);

	if (mdm->ipq807x_attach) {

		dev_info(mdm->dev, "IPQ807x attach detected\n");

		mdm->gpio_base = ioremap(GPIO_BASE, GPIO_REG_SIZE);

	}



	ret = setup_ipc(mdm);

	if (ret) {

		dev_err(mdm->dev, "Error setting up gpios\n");
@@ -426,6 +464,9 @@ static int sdx_ext_ipc_remove(struct platform_device *pdev) 
						&mdm->panic_blk);

	remove_ipc(mdm);

	device_remove_file(mdm->dev, &dev_attr_policy);

	if (mdm->ipq807x_attach)

		iounmap(mdm->gpio_base);



	return 0;

}