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From 2034addc7e193dc81d7ca60d8884832751b76758 Mon Sep 17 00:00:00 2001
From: Ajay Kishore <akisho@codeaurora.org>
Date: Tue, 24 Jan 2017 14:14:16 +0530
Subject: pinctrl: qcom: use scm_call to route GPIO irq to Apps
For IPQ806x targets, TZ protects the registers that are used to
configure the routing of interrupts to a target processor.
To resolve this, this patch uses scm call to route GPIO interrupts
to application processor. Also the scm call interface is changed.
Change-Id: Ib6c06829d04bc8c20483c36e63da92e26cdef9ce
Signed-off-by: Ajay Kishore <akisho@codeaurora.org>
---
--- a/drivers/pinctrl/qcom/pinctrl-msm.c
+++ b/drivers/pinctrl/qcom/pinctrl-msm.c
@@ -30,7 +30,8 @@
#include <linux/reboot.h>
#include <linux/pm.h>
#include <linux/log2.h>
-
+#include <linux/qcom_scm.h>
+#include <linux/io.h>
#include "../core.h"
#include "../pinconf.h"
#include "pinctrl-msm.h"
@@ -628,6 +629,9 @@ static void msm_gpio_irq_mask(struct irq
const struct msm_pingroup *g;
unsigned long flags;
u32 val;
+ u32 addr;
+ int ret;
+ const __be32 *reg;
g = &pctrl->soc->groups[d->hwirq];
@@ -732,11 +736,30 @@ static int msm_gpio_irq_set_type(struct
else
clear_bit(d->hwirq, pctrl->dual_edge_irqs);
+ int ret = of_device_is_compatible(pctrl->dev->of_node,
+ "qcom,ipq8064-pinctrl");
/* Route interrupts to application cpu */
- val = readl(pctrl->regs + g->intr_target_reg);
- val &= ~(7 << g->intr_target_bit);
- val |= g->intr_target_kpss_val << g->intr_target_bit;
- writel(val, pctrl->regs + g->intr_target_reg);
+ if (!ret) {
+ val = readl(pctrl->regs + g->intr_target_reg);
+ val &= ~(7 << g->intr_target_bit);
+ val |= g->intr_target_kpss_val << g->intr_target_bit;
+ writel(val, pctrl->regs + g->intr_target_reg);
+ } else {
+ const __be32 *reg = of_get_property(pctrl->dev->of_node, "reg", NULL);
+ if (reg) {
+ u32 addr = be32_to_cpup(reg) + g->intr_target_reg;
+ qcom_scm_io_readl(addr, &val);
+ __iormb();
+
+ val &= ~(7 << g->intr_target_bit);
+ val |= g->intr_target_kpss_val << g->intr_target_bit;
+
+ __iowmb();
+ ret = qcom_scm_io_writel(addr, val);
+ if (ret)
+ pr_err("\n Routing interrupts to Apps proc failed");
+ }
+ }
/* Update configuration for gpio.
* RAW_STATUS_EN is left on for all gpio irqs. Due to the
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