mirror of https://github.com/hak5/openwrt.git
72 lines
2.2 KiB
Diff
72 lines
2.2 KiB
Diff
From 2034addc7e193dc81d7ca60d8884832751b76758 Mon Sep 17 00:00:00 2001
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From: Ajay Kishore <akisho@codeaurora.org>
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Date: Tue, 24 Jan 2017 14:14:16 +0530
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Subject: pinctrl: qcom: use scm_call to route GPIO irq to Apps
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For IPQ806x targets, TZ protects the registers that are used to
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configure the routing of interrupts to a target processor.
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To resolve this, this patch uses scm call to route GPIO interrupts
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to application processor. Also the scm call interface is changed.
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Change-Id: Ib6c06829d04bc8c20483c36e63da92e26cdef9ce
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Signed-off-by: Ajay Kishore <akisho@codeaurora.org>
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---
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--- a/drivers/pinctrl/qcom/pinctrl-msm.c
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+++ b/drivers/pinctrl/qcom/pinctrl-msm.c
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@@ -30,7 +30,8 @@
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#include <linux/reboot.h>
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#include <linux/pm.h>
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#include <linux/log2.h>
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-
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+#include <linux/qcom_scm.h>
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+#include <linux/io.h>
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#include "../core.h"
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#include "../pinconf.h"
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#include "pinctrl-msm.h"
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@@ -628,6 +629,9 @@ static void msm_gpio_irq_mask(struct irq
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const struct msm_pingroup *g;
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unsigned long flags;
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u32 val;
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+ u32 addr;
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+ int ret;
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+ const __be32 *reg;
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g = &pctrl->soc->groups[d->hwirq];
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@@ -732,11 +736,30 @@ static int msm_gpio_irq_set_type(struct
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else
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clear_bit(d->hwirq, pctrl->dual_edge_irqs);
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+ int ret = of_device_is_compatible(pctrl->dev->of_node,
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+ "qcom,ipq8064-pinctrl");
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/* Route interrupts to application cpu */
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- val = readl(pctrl->regs + g->intr_target_reg);
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- val &= ~(7 << g->intr_target_bit);
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- val |= g->intr_target_kpss_val << g->intr_target_bit;
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- writel(val, pctrl->regs + g->intr_target_reg);
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+ if (!ret) {
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+ val = readl(pctrl->regs + g->intr_target_reg);
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+ val &= ~(7 << g->intr_target_bit);
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+ val |= g->intr_target_kpss_val << g->intr_target_bit;
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+ writel(val, pctrl->regs + g->intr_target_reg);
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+ } else {
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+ const __be32 *reg = of_get_property(pctrl->dev->of_node, "reg", NULL);
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+ if (reg) {
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+ u32 addr = be32_to_cpup(reg) + g->intr_target_reg;
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+ qcom_scm_io_readl(addr, &val);
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+ __iormb();
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+
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+ val &= ~(7 << g->intr_target_bit);
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+ val |= g->intr_target_kpss_val << g->intr_target_bit;
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+
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+ __iowmb();
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+ ret = qcom_scm_io_writel(addr, val);
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+ if (ret)
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+ pr_err("\n Routing interrupts to Apps proc failed");
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+ }
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+ }
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/* Update configuration for gpio.
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* RAW_STATUS_EN is left on for all gpio irqs. Due to the
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