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Date: Tue, 4 Nov 2008 18:07:44 +0100
From: Marc Zyngier <maz@...terjones.org>
To: lkml <linux-kernel@...r.kernel.org>
Subject: Re: [RFC][PATCH] Port Arcom/Eurotech Viper over the
gpio_request_set API
As a proof of concept, use the gpio_request_set/gpio_free_set
functions in place of the open-coded stuff used on the Viper SBC.
Signed-off-by: Marc Zyngier <maz@...terjones.org>
---
arch/arm/mach-pxa/viper.c | 87 +++++++++++++----------------------------
drivers/pcmcia/pxa2xx_viper.c | 49 +++++++++--------------
2 files changed, 46 insertions(+), 90 deletions(-)
diff --git a/arch/arm/mach-pxa/viper.c b/arch/arm/mach-pxa/viper.c
index f5d1757..1355f91 100644
--- a/arch/arm/mach-pxa/viper.c
+++ b/arch/arm/mach-pxa/viper.c
@@ -343,35 +343,21 @@ static struct pxafb_mach_info fb_info = {
.lcd_conn = LCD_COLOR_TFT_16BPP | LCD_PCLK_EDGE_FALL,
};
+/* GPIO9 and 10 control FB backlight. Initialise to off */
+static struct gpio_config viper_backlight_gpio[] = {
+ { VIPER_BCKLIGHT_EN_GPIO, "Backlight", GPIO_CONFIG_DIRECTION_OUTPUT, 0 },
+ { VIPER_LCD_EN_GPIO, "LCD", GPIO_CONFIG_DIRECTION_OUTPUT, 0 },
+};
+
static int viper_backlight_init(struct device *dev)
{
int ret;
+ struct gpio_config *failed;
- /* GPIO9 and 10 control FB backlight. Initialise to off */
- ret = gpio_request(VIPER_BCKLIGHT_EN_GPIO, "Backlight");
- if (ret)
- goto err_request_bckl;
-
- ret = gpio_request(VIPER_LCD_EN_GPIO, "LCD");
- if (ret)
- goto err_request_lcd;
-
- ret = gpio_direction_output(VIPER_BCKLIGHT_EN_GPIO, 0);
- if (ret)
- goto err_dir;
+ ret = gpio_request_set(ARRAY_AND_SIZE(viper_backlight_gpio), &failed);
- ret = gpio_direction_output(VIPER_LCD_EN_GPIO, 0);
if (ret)
- goto err_dir;
-
- return 0;
-
-err_dir:
- gpio_free(VIPER_LCD_EN_GPIO);
-err_request_lcd:
- gpio_free(VIPER_BCKLIGHT_EN_GPIO);
-err_request_bckl:
- dev_err(dev, "Failed to setup LCD GPIOs\n");
+ dev_err(dev, "Failed to setup %s GPIO\n", failed->label);
return ret;
}
@@ -386,8 +372,7 @@ static int viper_backlight_notify(int brightness)
static void viper_backlight_exit(struct device *dev)
{
- gpio_free(VIPER_LCD_EN_GPIO);
- gpio_free(VIPER_BCKLIGHT_EN_GPIO);
+ gpio_free_set(ARRAY_AND_SIZE(viper_backlight_gpio));
}
static struct platform_pwm_backlight_data viper_backlight_data = {
@@ -817,51 +802,33 @@ error_tpm:
pr_err("viper: Couldn't %s, giving up\n", errstr);
}
+static struct gpio_config __initdata viper_vcore_gpios[] = {
+ { VIPER_PSU_DATA_GPIO, "PSU data", GPIO_CONFIG_DIRECTION_OUTPUT, 0, },
+ { VIPER_PSU_CLK_GPIO, "PSU clock", GPIO_CONFIG_DIRECTION_OUTPUT, 0, },
+ { VIPER_PSU_nCS_LD_GPIO, "PSU cs", GPIO_CONFIG_DIRECTION_OUTPUT, 0, },
+};
+
static void __init viper_init_vcore_gpios(void)
{
- if (gpio_request(VIPER_PSU_DATA_GPIO, "PSU data"))
- goto err_request_data;
-
- if (gpio_request(VIPER_PSU_CLK_GPIO, "PSU clock"))
- goto err_request_clk;
+ struct gpio_config *failed;
- if (gpio_request(VIPER_PSU_nCS_LD_GPIO, "PSU cs"))
- goto err_request_cs;
-
- if (gpio_direction_output(VIPER_PSU_DATA_GPIO, 0) ||
- gpio_direction_output(VIPER_PSU_CLK_GPIO, 0) ||
- gpio_direction_output(VIPER_PSU_nCS_LD_GPIO, 0))
- goto err_dir;
+ if (gpio_request_set(ARRAY_AND_SIZE(viper_vcore_gpios), &failed)) {
+ pr_err("viper: Failed to setup %s GPIO\n", failed->label);
+ return;
+ }
/* c/should assume redboot set the correct level ??? */
viper_set_core_cpu_voltage(get_clk_frequency_khz(0), 1);
-
- return;
-
-err_dir:
- gpio_free(VIPER_PSU_nCS_LD_GPIO);
-err_request_cs:
- gpio_free(VIPER_PSU_CLK_GPIO);
-err_request_clk:
- gpio_free(VIPER_PSU_DATA_GPIO);
-err_request_data:
- pr_err("viper: Failed to setup vcore control GPIOs\n");
}
+static struct gpio_config __initdata viper_serial_gpio[] = {
+ { VIPER_UART_SHDN_GPIO, "UARTs shutdown", GPIO_CONFIG_DIRECTION_OUTPUT, 0, },
+};
+
static void __init viper_init_serial_gpio(void)
{
- if (gpio_request(VIPER_UART_SHDN_GPIO, "UARTs shutdown"))
- goto err_request;
-
- if (gpio_direction_output(VIPER_UART_SHDN_GPIO, 0))
- goto err_dir;
-
- return;
-
-err_dir:
- gpio_free(VIPER_UART_SHDN_GPIO);
-err_request:
- pr_err("viper: Failed to setup UART shutdown GPIO\n");
+ if (gpio_request_set(ARRAY_AND_SIZE(viper_serial_gpio), NULL))
+ pr_err("viper: Failed to setup UART shutdown GPIO\n");
}
#ifdef CONFIG_CPU_FREQ
diff --git a/drivers/pcmcia/pxa2xx_viper.c b/drivers/pcmcia/pxa2xx_viper.c
index dd10481..0f39558 100644
--- a/drivers/pcmcia/pxa2xx_viper.c
+++ b/drivers/pcmcia/pxa2xx_viper.c
@@ -37,44 +37,35 @@ static struct pcmcia_irqs irqs[] = {
{ 0, gpio_to_irq(VIPER_CF_CD_GPIO), "PCMCIA_CD" }
};
+/* GPIO 82 is the CF power enable line. initially off */
+static struct gpio_config viper_pcmcia_gpios[] = {
+ { VIPER_CF_CD_GPIO, "CF detect", GPIO_CONFIG_DIRECTION_INPUT, },
+ { VIPER_CF_RDY_GPIO, "CF ready", GPIO_CONFIG_DIRECTION_INPUT, },
+ { VIPER_CF_POWER_GPIO, "CF power", GPIO_CONFIG_DIRECTION_OUTPUT, 0, },
+};
+
static int viper_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
{
unsigned long flags;
+ int ret;
+ struct gpio_config *failed;
skt->irq = gpio_to_irq(VIPER_CF_RDY_GPIO);
- if (gpio_request(VIPER_CF_CD_GPIO, "CF detect"))
- goto err_request_cd;
-
- if (gpio_request(VIPER_CF_RDY_GPIO, "CF ready"))
- goto err_request_rdy;
-
- if (gpio_request(VIPER_CF_POWER_GPIO, "CF power"))
- goto err_request_pwr;
-
local_irq_save(flags);
- /* GPIO 82 is the CF power enable line. initially off */
- if (gpio_direction_output(VIPER_CF_POWER_GPIO, 0) ||
- gpio_direction_input(VIPER_CF_CD_GPIO) ||
- gpio_direction_input(VIPER_CF_RDY_GPIO)) {
- local_irq_restore(flags);
- goto err_dir;
- }
-
+ ret = gpio_request_set(viper_pcmcia_gpios,
+ ARRAY_SIZE(viper_pcmcia_gpios),
+ &failed);
+
local_irq_restore(flags);
- return soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
+ if (ret) {
+ pr_err("viper: Failed to setup %s GPIOs\n", failed->label);
+ return ret;
+ }
-err_dir:
- gpio_free(VIPER_CF_POWER_GPIO);
-err_request_pwr:
- gpio_free(VIPER_CF_RDY_GPIO);
-err_request_rdy:
- gpio_free(VIPER_CF_CD_GPIO);
-err_request_cd:
- printk(KERN_ERR "viper: Failed to setup PCMCIA GPIOs\n");
- return -1;
+ return soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
}
/*
@@ -83,9 +74,7 @@ err_request_cd:
static void viper_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
{
soc_pcmcia_free_irqs(skt, irqs, ARRAY_SIZE(irqs));
- gpio_free(VIPER_CF_POWER_GPIO);
- gpio_free(VIPER_CF_RDY_GPIO);
- gpio_free(VIPER_CF_CD_GPIO);
+ gpio_free_set(viper_pcmcia_gpios, ARRAY_SIZE(viper_pcmcia_gpios));
}
static void viper_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
--
1.5.4.3
--
A rat a day keeps the plague away.
--
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