lkml.org 
[lkml]   [2020]   [Mar]   [13]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH] pinctrl: qcom: use scm_call to route GPIO irq to Apps
Date
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.

Signed-off-by: Ajay Kishore <akisho@codeaurora.org>
Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
---
drivers/pinctrl/qcom/pinctrl-msm.c | 36 ++++++++++++++++++++++++++----
1 file changed, 32 insertions(+), 4 deletions(-)

diff --git a/drivers/pinctrl/qcom/pinctrl-msm.c b/drivers/pinctrl/qcom/pinctrl-msm.c
index 9a8daa256a32..a83cfd1da219 100644
--- a/drivers/pinctrl/qcom/pinctrl-msm.c
+++ b/drivers/pinctrl/qcom/pinctrl-msm.c
@@ -22,6 +22,8 @@
#include <linux/reboot.h>
#include <linux/pm.h>
#include <linux/log2.h>
+#include <linux/qcom_scm.h>
+#include <linux/io.h>

#include <linux/soc/qcom/irq.h>

@@ -710,6 +712,9 @@ static void msm_gpio_irq_mask(struct irq_data *d)
const struct msm_pingroup *g;
unsigned long flags;
u32 val;
+ u32 addr;
+ int ret;
+ const __be32 *reg;

if (d->parent_data)
irq_chip_mask_parent(d);
@@ -863,6 +868,7 @@ static int msm_gpio_irq_set_type(struct irq_data *d, unsigned int type)
const struct msm_pingroup *g;
unsigned long flags;
u32 val;
+ int ret;

if (d->parent_data)
irq_chip_set_type_parent(d, type);
@@ -882,11 +888,33 @@ static int msm_gpio_irq_set_type(struct irq_data *d, unsigned int type)
else
clear_bit(d->hwirq, pctrl->dual_edge_irqs);

+ ret = of_device_is_compatible(pctrl->dev->of_node,
+ "qcom,ipq8064-pinctrl");
/* Route interrupts to application cpu */
- val = msm_readl_intr_target(pctrl, g);
- val &= ~(7 << g->intr_target_bit);
- val |= g->intr_target_kpss_val << g->intr_target_bit;
- msm_writel_intr_target(val, pctrl, g);
+ if (!ret) {
+ val = msm_readl_intr_target(pctrl, g);
+ val &= ~(7 << g->intr_target_bit);
+ val |= g->intr_target_kpss_val << g->intr_target_bit;
+ msm_writel_intr_target(val, pctrl, g);
+ } 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
--
2.25.0
\
 
 \ /
  Last update: 2020-03-13 20:15    [W:0.041 / U:38.472 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site