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-rw-r--r--drivers/of/irq.c107
-rw-r--r--drivers/tty/serial/msm_serial.c30
2 files changed, 127 insertions, 10 deletions
diff --git a/drivers/of/irq.c b/drivers/of/irq.c
index 6a5b5e777dd2..6d3dd3988d0f 100644
--- a/drivers/of/irq.c
+++ b/drivers/of/irq.c
@@ -19,10 +19,12 @@
*/
#include <linux/errno.h>
+#include <linux/list.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_irq.h>
#include <linux/string.h>
+#include <linux/slab.h>
/* For archs that don't support NO_IRQ (such as x86), provide a dummy value */
#ifndef NO_IRQ
@@ -386,3 +388,108 @@ int of_irq_to_resource_table(struct device_node *dev, struct resource *res,
return i;
}
+
+struct intc_desc {
+ struct list_head list;
+ struct device_node *dev;
+ struct device_node *interrupt_parent;
+};
+
+/**
+ * of_irq_init - Scan and init matching interrupt controllers in DT
+ * @matches: 0 terminated array of nodes to match and init function to call
+ *
+ * This function scans the device tree for matching interrupt controller nodes,
+ * and calls their initialization functions in order with parents first.
+ */
+void __init of_irq_init(const struct of_device_id *matches)
+{
+ struct device_node *np, *parent = NULL;
+ struct intc_desc *desc, *temp_desc;
+ struct list_head intc_desc_list, intc_parent_list;
+
+ INIT_LIST_HEAD(&intc_desc_list);
+ INIT_LIST_HEAD(&intc_parent_list);
+
+ for_each_matching_node(np, matches) {
+ if (!of_find_property(np, "interrupt-controller", NULL))
+ continue;
+ /*
+ * Here, we allocate and populate an intc_desc with the node
+ * pointer, interrupt-parent device_node etc.
+ */
+ desc = kzalloc(sizeof(*desc), GFP_KERNEL);
+ if (WARN_ON(!desc))
+ goto err;
+
+ desc->dev = np;
+ desc->interrupt_parent = of_irq_find_parent(np);
+ list_add_tail(&desc->list, &intc_desc_list);
+ }
+
+ /*
+ * The root irq controller is the one without an interrupt-parent.
+ * That one goes first, followed by the controllers that reference it,
+ * followed by the ones that reference the 2nd level controllers, etc.
+ */
+ while (!list_empty(&intc_desc_list)) {
+ /*
+ * Process all controllers with the current 'parent'.
+ * First pass will be looking for NULL as the parent.
+ * The assumption is that NULL parent means a root controller.
+ */
+ list_for_each_entry_safe(desc, temp_desc, &intc_desc_list, list) {
+ const struct of_device_id *match;
+ int ret;
+ of_irq_init_cb_t irq_init_cb;
+
+ if (desc->interrupt_parent != parent)
+ continue;
+
+ list_del(&desc->list);
+ match = of_match_node(matches, desc->dev);
+ if (WARN(!match->data,
+ "of_irq_init: no init function for %s\n",
+ match->compatible)) {
+ kfree(desc);
+ continue;
+ }
+
+ pr_debug("of_irq_init: init %s @ %p, parent %p\n",
+ match->compatible,
+ desc->dev, desc->interrupt_parent);
+ irq_init_cb = match->data;
+ ret = irq_init_cb(desc->dev, desc->interrupt_parent);
+ if (ret) {
+ kfree(desc);
+ continue;
+ }
+
+ /*
+ * This one is now set up; add it to the parent list so
+ * its children can get processed in a subsequent pass.
+ */
+ list_add_tail(&desc->list, &intc_parent_list);
+ }
+
+ /* Get the next pending parent that might have children */
+ desc = list_first_entry(&intc_parent_list, typeof(*desc), list);
+ if (list_empty(&intc_parent_list) || !desc) {
+ pr_err("of_irq_init: children remain, but no parents\n");
+ break;
+ }
+ list_del(&desc->list);
+ parent = desc->dev;
+ kfree(desc);
+ }
+
+ list_for_each_entry_safe(desc, temp_desc, &intc_parent_list, list) {
+ list_del(&desc->list);
+ kfree(desc);
+ }
+err:
+ list_for_each_entry_safe(desc, temp_desc, &intc_desc_list, list) {
+ list_del(&desc->list);
+ kfree(desc);
+ }
+}
diff --git a/drivers/tty/serial/msm_serial.c b/drivers/tty/serial/msm_serial.c
index 29cbfd8c4e7c..8131e2c28015 100644
--- a/drivers/tty/serial/msm_serial.c
+++ b/drivers/tty/serial/msm_serial.c
@@ -19,6 +19,7 @@
# define SUPPORT_SYSRQ
#endif
+#include <linux/atomic.h>
#include <linux/hrtimer.h>
#include <linux/module.h>
#include <linux/io.h>
@@ -33,6 +34,8 @@
#include <linux/clk.h>
#include <linux/platform_device.h>
#include <linux/delay.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
#include "msm_serial.h"
@@ -589,9 +592,8 @@ static void msm_release_port(struct uart_port *port)
iowrite32(GSBI_PROTOCOL_IDLE, msm_port->gsbi_base +
GSBI_CONTROL);
- gsbi_resource = platform_get_resource_byname(pdev,
- IORESOURCE_MEM,
- "gsbi_resource");
+ gsbi_resource = platform_get_resource(pdev,
+ IORESOURCE_MEM, 1);
if (unlikely(!gsbi_resource))
return;
@@ -612,8 +614,7 @@ static int msm_request_port(struct uart_port *port)
resource_size_t size;
int ret;
- uart_resource = platform_get_resource_byname(pdev, IORESOURCE_MEM,
- "uart_resource");
+ uart_resource = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (unlikely(!uart_resource))
return -ENXIO;
@@ -628,8 +629,7 @@ static int msm_request_port(struct uart_port *port)
goto fail_release_port;
}
- gsbi_resource = platform_get_resource_byname(pdev, IORESOURCE_MEM,
- "gsbi_resource");
+ gsbi_resource = platform_get_resource(pdev, IORESOURCE_MEM, 1);
/* Is this a GSBI-based port? */
if (gsbi_resource) {
size = resource_size(gsbi_resource);
@@ -857,6 +857,8 @@ static struct uart_driver msm_uart_driver = {
.cons = MSM_CONSOLE,
};
+static atomic_t msm_uart_next_id = ATOMIC_INIT(0);
+
static int __init msm_serial_probe(struct platform_device *pdev)
{
struct msm_port *msm_port;
@@ -864,6 +866,9 @@ static int __init msm_serial_probe(struct platform_device *pdev)
struct uart_port *port;
int irq;
+ if (pdev->id == -1)
+ pdev->id = atomic_inc_return(&msm_uart_next_id) - 1;
+
if (unlikely(pdev->id < 0 || pdev->id >= UART_NR))
return -ENXIO;
@@ -873,7 +878,7 @@ static int __init msm_serial_probe(struct platform_device *pdev)
port->dev = &pdev->dev;
msm_port = UART_TO_MSM(port);
- if (platform_get_resource_byname(pdev, IORESOURCE_MEM, "gsbi_resource"))
+ if (platform_get_resource(pdev, IORESOURCE_MEM, 1))
msm_port->is_uartdm = 1;
else
msm_port->is_uartdm = 0;
@@ -897,8 +902,7 @@ static int __init msm_serial_probe(struct platform_device *pdev)
printk(KERN_INFO "uartclk = %d\n", port->uartclk);
- resource = platform_get_resource_byname(pdev, IORESOURCE_MEM,
- "uart_resource");
+ resource = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (unlikely(!resource))
return -ENXIO;
port->mapbase = resource->start;
@@ -922,11 +926,17 @@ static int __devexit msm_serial_remove(struct platform_device *pdev)
return 0;
}
+static struct of_device_id msm_match_table[] = {
+ { .compatible = "qcom,msm-uart" },
+ {}
+};
+
static struct platform_driver msm_platform_driver = {
.remove = msm_serial_remove,
.driver = {
.name = "msm_serial",
.owner = THIS_MODULE,
+ .of_match_table = msm_match_table,
},
};