From: Keerthy <j-keerthy@ti.com>
To: <linus.walleij@linaro.org>, <t-kristo@ti.com>
Cc: <linux-gpio@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
<gnurou@gmail.com>, <grygorii.strashko@ti.com>,
<j-keerthy@ti.com>
Subject: [PATCH 3/3] gpio: davinci: Add support for multiple GPIO controllers
Date: Wed, 11 Jan 2017 10:30:41 +0530 [thread overview]
Message-ID: <1484110841-2391-4-git-send-email-j-keerthy@ti.com> (raw)
In-Reply-To: <1484110841-2391-1-git-send-email-j-keerthy@ti.com>
Update GPIO driver to support Multiple GPIO controllers by updating
the base of subsequent GPIO chips with total of previous chips
gpio count so that gpio_add_chip gets unique numbers.
Signed-off-by: Keerthy <j-keerthy@ti.com>
---
drivers/gpio/gpio-davinci.c | 4 +++-
include/linux/platform_data/gpio-davinci.h | 1 +
2 files changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/gpio/gpio-davinci.c b/drivers/gpio/gpio-davinci.c
index 6c1c00a..1928de3 100644
--- a/drivers/gpio/gpio-davinci.c
+++ b/drivers/gpio/gpio-davinci.c
@@ -186,7 +186,7 @@ static int davinci_gpio_of_xlate(struct gpio_chip *gc,
static int davinci_gpio_probe(struct platform_device *pdev)
{
- static int ctrl_num;
+ static int ctrl_num, bank_base;
int gpio, bank;
unsigned ngpio, nbank;
struct davinci_gpio_controller *chips;
@@ -240,6 +240,7 @@ static int davinci_gpio_probe(struct platform_device *pdev)
chips->chip.set = davinci_gpio_set;
chips->chip.ngpio = ngpio;
+ chip->chip.base = bank_base;
#ifdef CONFIG_OF_GPIO
chips->chip.of_gpio_n_cells = 2;
@@ -248,6 +249,7 @@ static int davinci_gpio_probe(struct platform_device *pdev)
chips->chip.of_node = dev->of_node;
#endif
spin_lock_init(&chips->lock);
+ bank_base += ngpio;
for (gpio = 0, bank = 0; gpio < ngpio; gpio += 32, bank++)
chips->regs[bank] = gpio_base + offset_array[bank];
diff --git a/include/linux/platform_data/gpio-davinci.h b/include/linux/platform_data/gpio-davinci.h
index ca09686..fd10f47 100644
--- a/include/linux/platform_data/gpio-davinci.h
+++ b/include/linux/platform_data/gpio-davinci.h
@@ -43,6 +43,7 @@ struct davinci_gpio_controller {
void __iomem *regs[MAX_BANKS];
int gpio_unbanked;
unsigned int base_irq;
+ unsigned int base;
};
/*
--
1.9.1
next prev parent reply other threads:[~2017-01-11 5:02 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-01-11 5:00 [PATCH 0/3] gpio: davinci: Redesign driver to accommodate ngpios in one gpio chip Keerthy
2017-01-11 5:00 ` [PATCH 1/3] gpio: davinci: Remove unwanted blank line Keerthy
2017-01-11 17:37 ` Grygorii Strashko
2017-01-12 1:53 ` Keerthy
2017-01-11 5:00 ` [PATCH 2/3] gpio: davinci: Redesign driver to accommodate ngpios in one gpio chip Keerthy
2017-01-11 17:53 ` Grygorii Strashko
2017-01-12 2:00 ` Keerthy
2017-01-12 19:06 ` Grygorii Strashko
2017-01-13 3:42 ` Keerthy
2017-01-11 5:00 ` Keerthy [this message]
2017-01-17 14:52 ` [PATCH 0/3] " Linus Walleij
2017-01-17 16:14 ` Keerthy
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