lkml.org 
[lkml]   [2014]   [Jan]   [15]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH] pinctrl: sirf: lock IRQs when starting them
Date
This uses the new API for tagging GPIO lines as in use by
IRQs. This enforces a few semantic checks on how the underlying
GPIO line is used.

Also assign the gpio_chip.dev pointer to be used for error
messages.

Cc: Barry Song <Baohua.Song@csr.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
Hi Barry, it's be great if you could test this so I can just
add it to the v3.14 series.
---
drivers/pinctrl/sirf/pinctrl-sirf.c | 23 +++++++++++++++++++++++
1 file changed, 23 insertions(+)

diff --git a/drivers/pinctrl/sirf/pinctrl-sirf.c b/drivers/pinctrl/sirf/pinctrl-sirf.c
index b637f5ab022c..a0d6152701cd 100644
--- a/drivers/pinctrl/sirf/pinctrl-sirf.c
+++ b/drivers/pinctrl/sirf/pinctrl-sirf.c
@@ -594,12 +594,34 @@ static int sirfsoc_gpio_irq_type(struct irq_data *d, unsigned type)
return 0;
}

+static unsigned int sirfsoc_gpio_irq_startup(struct irq_data *d)
+{
+ struct sirfsoc_gpio_bank *bank = irq_data_get_irq_chip_data(d);
+
+ if (gpio_lock_as_irq(&bank->chip.gc, d->hwirq))
+ dev_err(bank->chip.gc.dev,
+ "unable to lock HW IRQ %lu for IRQ\n",
+ d->hwirq);
+ sirfsoc_gpio_irq_unmask(d);
+ return 0;
+}
+
+static void sirfsoc_gpio_irq_shutdown(struct irq_data *d)
+{
+ struct sirfsoc_gpio_bank *bank = irq_data_get_irq_chip_data(d);
+
+ sirfsoc_gpio_irq_mask(d);
+ gpio_unlock_as_irq(&bank->chip.gc, d->hwirq);
+}
+
static struct irq_chip sirfsoc_irq_chip = {
.name = "sirf-gpio-irq",
.irq_ack = sirfsoc_gpio_irq_ack,
.irq_mask = sirfsoc_gpio_irq_mask,
.irq_unmask = sirfsoc_gpio_irq_unmask,
.irq_set_type = sirfsoc_gpio_irq_type,
+ .irq_startup = sirfsoc_gpio_irq_startup,
+ .irq_shutdown = sirfsoc_gpio_irq_shutdown,
};

static void sirfsoc_gpio_handle_irq(unsigned int irq, struct irq_desc *desc)
@@ -877,6 +899,7 @@ static int sirfsoc_gpio_probe(struct device_node *np)
bank->chip.gc.of_node = np;
bank->chip.gc.of_xlate = sirfsoc_gpio_of_xlate;
bank->chip.gc.of_gpio_n_cells = 2;
+ bank->chip.gc.dev = &pdev->dev;
bank->chip.regs = regs;
bank->id = i;
bank->is_marco = is_marco;
--
1.8.4.2


\
 
 \ /
  Last update: 2014-01-15 10:41    [W:0.077 / U:0.552 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site