[PATCH] ARM: OMAP: Cleanup Beagleboard DVI reset gpio
Russ Dill
Russ.Dill at ti.com
Tue May 8 22:49:06 EDT 2012
This removes several boot warnings from board-omap3beagle.c:
- gpio_request: gpio--22 (DVI reset) status -22
- Unable to get DVI reset GPIO
There is a combination of leftover code and revision confusion.
Additionally, xM support is currently a hack.
For original Beagleboard this removes the double initialization of GPIO
170, properly configures it as an output, and wraps the initialization
in an if block so that xM does not attempt to request it.
For Beagleboard xM it removes reference to GPIO 129 which was part
of rev A1 and A2 designs, but never functioned. It then properly assigns
beagle_dvi_device.reset_gpio in beagle_twl_gpio_setup and removes the
hack of initializing it high. Additionally, it uses
gpio_set_value_cansleep since this GPIO is connected through i2c.
Unfortunately, there is no way to tell the difference between xM A2 and
A3. However, GPIO 129 does not function on rev A1 and A2, and the TWL
GPIO used on A3 and beyond is not used on rev A1 and A2, there are no
problems created by this fix.
v3
- Change patch title to include 'ARM: OMAP:'
- Actually rename reset_gpio to dvi_reset_gpio
v2
- Rename reset_gpio to dvi_reset_gpio to self document
- Use gpio_set_value_cansleep since TWL gpio can sleep
- Use gpio_is_valid instead of -EINVAL check
Tested on Beagleboard-xM Rev C1 and Beagleboard Rev B4.
Signed-off-by: Russ Dill <Russ.Dill at ti.com>
---
arch/arm/mach-omap2/board-omap3beagle.c | 49 ++++++++++++++++---------------
1 file changed, 26 insertions(+), 23 deletions(-)
diff --git a/arch/arm/mach-omap2/board-omap3beagle.c b/arch/arm/mach-omap2/board-omap3beagle.c
index 495b810..3956c51 100644
--- a/arch/arm/mach-omap2/board-omap3beagle.c
+++ b/arch/arm/mach-omap2/board-omap3beagle.c
@@ -81,13 +81,13 @@ static u8 omap3_beagle_version;
static struct {
int mmc1_gpio_wp;
int usb_pwr_level;
- int reset_gpio;
+ int dvi_reset_gpio;
int usr_button_gpio;
int mmc_caps;
} beagle_config = {
.mmc1_gpio_wp = -EINVAL,
.usb_pwr_level = GPIOF_OUT_INIT_LOW,
- .reset_gpio = 129,
+ .dvi_reset_gpio = -EINVAL,
.usr_button_gpio = 4,
.mmc_caps = MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA,
};
@@ -126,21 +126,21 @@ static void __init omap3_beagle_init_rev(void)
printk(KERN_INFO "OMAP3 Beagle Rev: Ax/Bx\n");
omap3_beagle_version = OMAP3BEAGLE_BOARD_AXBX;
beagle_config.mmc1_gpio_wp = 29;
- beagle_config.reset_gpio = 170;
+ beagle_config.dvi_reset_gpio = 170;
beagle_config.usr_button_gpio = 7;
break;
case 6:
printk(KERN_INFO "OMAP3 Beagle Rev: C1/C2/C3\n");
omap3_beagle_version = OMAP3BEAGLE_BOARD_C1_3;
beagle_config.mmc1_gpio_wp = 23;
- beagle_config.reset_gpio = 170;
+ beagle_config.dvi_reset_gpio = 170;
beagle_config.usr_button_gpio = 7;
break;
case 5:
printk(KERN_INFO "OMAP3 Beagle Rev: C4\n");
omap3_beagle_version = OMAP3BEAGLE_BOARD_C4;
beagle_config.mmc1_gpio_wp = 23;
- beagle_config.reset_gpio = 170;
+ beagle_config.dvi_reset_gpio = 170;
beagle_config.usr_button_gpio = 7;
break;
case 0:
@@ -196,7 +196,7 @@ static struct mtd_partition omap3beagle_nand_partitions[] = {
static int beagle_enable_dvi(struct omap_dss_device *dssdev)
{
if (gpio_is_valid(dssdev->reset_gpio))
- gpio_set_value(dssdev->reset_gpio, 1);
+ gpio_set_value_cansleep(dssdev->reset_gpio, 1);
return 0;
}
@@ -204,7 +204,7 @@ static int beagle_enable_dvi(struct omap_dss_device *dssdev)
static void beagle_disable_dvi(struct omap_dss_device *dssdev)
{
if (gpio_is_valid(dssdev->reset_gpio))
- gpio_set_value(dssdev->reset_gpio, 0);
+ gpio_set_value_cansleep(dssdev->reset_gpio, 0);
}
static struct panel_dvi_platform_data dvi_panel = {
@@ -242,12 +242,17 @@ static struct omap_dss_board_info beagle_dss_data = {
static void __init beagle_display_init(void)
{
- int r;
-
- r = gpio_request_one(beagle_dvi_device.reset_gpio, GPIOF_OUT_INIT_LOW,
- "DVI reset");
- if (r < 0)
- printk(KERN_ERR "Unable to get DVI reset GPIO\n");
+ if (gpio_is_valid(beagle_config.dvi_reset_gpio)) {
+ int r;
+
+ omap_mux_init_gpio(beagle_config.dvi_reset_gpio, OMAP_PIN_OUTPUT);
+ r = gpio_request_one(beagle_config.dvi_reset_gpio,
+ GPIOF_OUT_INIT_LOW, "DVI reset");
+ if (r < 0)
+ printk(KERN_ERR "Unable to get DVI reset GPIO\n");
+ else
+ beagle_dvi_device.reset_gpio = beagle_config.dvi_reset_gpio;
+ }
}
#include "sdram-micron-mt46h32m32lf-6.h"
@@ -299,11 +304,14 @@ static int beagle_twl_gpio_setup(struct device *dev,
if (r)
pr_err("%s: unable to configure nDVI_PWR_EN\n",
__func__);
- r = gpio_request_one(gpio + 2, GPIOF_OUT_INIT_HIGH,
- "DVI_LDO_EN");
+
+ r = gpio_request_one(gpio + 2, GPIOF_OUT_INIT_LOW,
+ "DVI_PU");
if (r)
- pr_err("%s: unable to configure DVI_LDO_EN\n",
- __func__);
+ pr_err("%s: unable to get DVI_PU GPIO\n", __func__);
+ else
+ beagle_dvi_device.reset_gpio = gpio + 2;
+
} else {
/*
* REVISIT: need ehci-omap hooks for external VBUS
@@ -312,7 +320,6 @@ static int beagle_twl_gpio_setup(struct device *dev,
if (gpio_request_one(gpio + 1, GPIOF_IN, "EHCI_nOC"))
pr_err("%s: unable to configure EHCI_nOC\n", __func__);
}
- beagle_dvi_device.reset_gpio = beagle_config.reset_gpio;
gpio_request_one(gpio + TWL4030_GPIO_MAX, beagle_config.usb_pwr_level,
"nEN_USB_PWR");
@@ -524,7 +531,7 @@ static void __init omap3_beagle_init(void)
omap3_mux_init(board_mux, OMAP_PACKAGE_CBB);
omap3_beagle_init_rev();
- if (beagle_config.mmc1_gpio_wp != -EINVAL)
+ if (gpio_is_valid(beagle_config.mmc1_gpio_wp))
omap_mux_init_gpio(beagle_config.mmc1_gpio_wp, OMAP_PIN_INPUT);
mmc[0].caps = beagle_config.mmc_caps;
omap_hsmmc_init(mmc);
@@ -540,10 +547,6 @@ static void __init omap3_beagle_init(void)
omap_sdrc_init(mt46h32m32lf6_sdrc_params,
mt46h32m32lf6_sdrc_params);
- omap_mux_init_gpio(170, OMAP_PIN_INPUT);
- /* REVISIT leave DVI powered down until it's needed ... */
- gpio_request_one(170, GPIOF_OUT_INIT_HIGH, "DVI_nPD");
-
usb_musb_init(NULL);
usbhs_init(&usbhs_bdata);
omap_nand_flash_init(NAND_BUSWIDTH_16, omap3beagle_nand_partitions,
--
1.7.9.5
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