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authorJanusz Krzysztofik <jmkrzyszt@gmail.com>2018-06-22 00:41:27 +0200
committerTony Lindgren <tony@atomide.com>2018-07-02 23:05:14 -0700
commita617b36bbc0a1d175bbe98e009e903c1ea0e2be5 (patch)
treea3867b0bdecdc28de0c9971ec35ea4a6d95733b5 /arch/arm/mach-omap1
parentdc8fbeb0ffde1f2395449006019e2c89c177df50 (diff)
Input: ams_delta_serio: use IRQ resource
The driver still obtains IRQ number from a hardcoded GPIO. Use IRQ resource instead. For this to work on Amstrad Delta, add the IRQ resource to ams-delta-serio platform device structure. Obtain the IRQ number assigned to "keybrd_clk" GPIO pin from FIQ initialization routine. As a benefit, the driver no longer needs to include <mach/board-ams-delta.h>. Signed-off-by: Janusz Krzysztofik <jmkrzyszt@gmail.com> Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
Diffstat (limited to 'arch/arm/mach-omap1')
-rw-r--r--arch/arm/mach-omap1/ams-delta-fiq.c20
-rw-r--r--arch/arm/mach-omap1/ams-delta-fiq.h3
-rw-r--r--arch/arm/mach-omap1/board-ams-delta.c17
3 files changed, 37 insertions, 3 deletions
diff --git a/arch/arm/mach-omap1/ams-delta-fiq.c b/arch/arm/mach-omap1/ams-delta-fiq.c
index e72935034d42..82ca4246a5e4 100644
--- a/arch/arm/mach-omap1/ams-delta-fiq.c
+++ b/arch/arm/mach-omap1/ams-delta-fiq.c
@@ -20,6 +20,7 @@
#include <linux/module.h>
#include <linux/io.h>
#include <linux/platform_data/ams-delta-fiq.h>
+#include <linux/platform_device.h>
#include <mach/board-ams-delta.h>
@@ -84,7 +85,8 @@ static irqreturn_t deferred_fiq(int irq, void *dev_id)
return IRQ_HANDLED;
}
-void __init ams_delta_init_fiq(struct gpio_chip *chip)
+void __init ams_delta_init_fiq(struct gpio_chip *chip,
+ struct platform_device *serio)
{
struct gpio_desc *gpiod, *data = NULL, *clk = NULL;
void *fiqhandler_start;
@@ -201,6 +203,22 @@ void __init ams_delta_init_fiq(struct gpio_chip *chip)
val = omap_readl(OMAP_IH1_BASE + offset) | 1;
omap_writel(val, OMAP_IH1_BASE + offset);
+ /* Initialize serio device IRQ resource */
+ serio->resource[0].start = gpiod_to_irq(clk);
+ serio->resource[0].end = serio->resource[0].start;
+
+ /*
+ * Since FIQ handler performs handling of GPIO registers for
+ * "keybrd_clk" IRQ pin, ams_delta_serio driver used to set
+ * handle_simple_irq() as active IRQ handler for that pin to avoid
+ * bad interaction with gpio-omap driver. This is no longer needed
+ * as handle_simple_irq() is now the default handler for OMAP GPIO
+ * edge interrupts.
+ * This comment replaces the obsolete code which has been removed
+ * from the ams_delta_serio driver and stands here only as a reminder
+ * of that dependency on gpio-omap driver behavior.
+ */
+
return;
out_gpio:
diff --git a/arch/arm/mach-omap1/ams-delta-fiq.h b/arch/arm/mach-omap1/ams-delta-fiq.h
index 3f691d68aa62..fd76df3cce37 100644
--- a/arch/arm/mach-omap1/ams-delta-fiq.h
+++ b/arch/arm/mach-omap1/ams-delta-fiq.h
@@ -35,7 +35,8 @@
#ifndef __ASSEMBLER__
extern unsigned char qwerty_fiqin_start, qwerty_fiqin_end;
-extern void __init ams_delta_init_fiq(struct gpio_chip *chip);
+extern void __init ams_delta_init_fiq(struct gpio_chip *chip,
+ struct platform_device *pdev);
#endif
#endif
diff --git a/arch/arm/mach-omap1/board-ams-delta.c b/arch/arm/mach-omap1/board-ams-delta.c
index 902c24cc8508..f453b08ed7ef 100644
--- a/arch/arm/mach-omap1/board-ams-delta.c
+++ b/arch/arm/mach-omap1/board-ams-delta.c
@@ -521,9 +521,24 @@ static struct platform_device cx20442_codec_device = {
.id = -1,
};
+static struct resource ams_delta_serio_resources[] = {
+ {
+ .flags = IORESOURCE_IRQ,
+ /*
+ * Initialize IRQ resource with invalid IRQ number.
+ * It will be replaced with dynamically allocated GPIO IRQ
+ * obtained from GPIO chip as soon as the chip is available.
+ */
+ .start = -EINVAL,
+ .end = -EINVAL,
+ },
+};
+
static struct platform_device ams_delta_serio_device = {
.name = "ams-delta-serio",
.id = PLATFORM_DEVID_NONE,
+ .num_resources = ARRAY_SIZE(ams_delta_serio_resources),
+ .resource = ams_delta_serio_resources,
};
static struct regulator_consumer_supply keybrd_pwr_consumers[] = {
@@ -632,7 +647,7 @@ static void __init omap_gpio_deps_init(void)
return;
}
- ams_delta_init_fiq(chip);
+ ams_delta_init_fiq(chip, &ams_delta_serio_device);
}
static void __init ams_delta_init(void)