diff options
Diffstat (limited to 'extras/recipes-kernel/linux/linux-omap-psp-2.6.32/cam/0023-omap3beagle-camera-Fix-powerup-sequence.patch')
| -rw-r--r-- | extras/recipes-kernel/linux/linux-omap-psp-2.6.32/cam/0023-omap3beagle-camera-Fix-powerup-sequence.patch | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/extras/recipes-kernel/linux/linux-omap-psp-2.6.32/cam/0023-omap3beagle-camera-Fix-powerup-sequence.patch b/extras/recipes-kernel/linux/linux-omap-psp-2.6.32/cam/0023-omap3beagle-camera-Fix-powerup-sequence.patch new file mode 100644 index 00000000..052b9152 --- /dev/null +++ b/extras/recipes-kernel/linux/linux-omap-psp-2.6.32/cam/0023-omap3beagle-camera-Fix-powerup-sequence.patch @@ -0,0 +1,103 @@ +From e4f2c3641ccae2cb1614c8fda5ce307170b20921 Mon Sep 17 00:00:00 2001 +From: Sergio Aguirre <saaguirre@ti.com> +Date: Thu, 24 Jun 2010 18:21:52 -0500 +Subject: [PATCH 23/75] omap3beagle: camera: Fix powerup sequence + +The powerup sequence was very incomplete. After revisiting the +Aptina developer's guide, the resulting powerup sequence is followed. + +Signed-off-by: Sergio Aguirre <saaguirre@ti.com> +--- + arch/arm/mach-omap2/board-omap3beagle-camera.c | 49 ++++++++++++++++++++++-- + 1 files changed, 45 insertions(+), 4 deletions(-) + +diff --git a/arch/arm/mach-omap2/board-omap3beagle-camera.c b/arch/arm/mach-omap2/board-omap3beagle-camera.c +index 6babaf3..792c48d 100644 +--- a/arch/arm/mach-omap2/board-omap3beagle-camera.c ++++ b/arch/arm/mach-omap2/board-omap3beagle-camera.c +@@ -51,6 +51,8 @@ + + #define ISP_MT9T111_MCLK 216000000 + ++#define LEOPARD_RESET_GPIO 98 ++ + static struct regulator *beagle_mt9t111_1_8v; + static struct regulator *beagle_mt9t111_2_8v; + +@@ -174,16 +176,42 @@ static int mt9t111_power_set(struct v4l2_int_device *s, enum v4l2_power power) + break; + + case V4L2_POWER_ON: +- isp_set_xclk(vdev->cam->isp, MT9T111_CLK_MIN, CAM_USE_XCLKA); +- + #if defined(CONFIG_VIDEO_OMAP3) || defined(CONFIG_VIDEO_OMAP3_MODULE) + isp_configure_interface(vdev->cam->isp, &mt9t111_if_config); + #endif + +- /* turn on analog power */ ++ /* Set RESET_BAR to 0 */ ++ gpio_set_value(LEOPARD_RESET_GPIO, 0); ++ ++ /* turn on VDD */ + regulator_enable(beagle_mt9t111_1_8v); ++ ++ mdelay(1); ++ ++ /* turn on VDD_IO */ + regulator_enable(beagle_mt9t111_2_8v); +- udelay(100); ++ ++ mdelay(50); ++ ++ /* Enable EXTCLK */ ++ isp_set_xclk(vdev->cam->isp, MT9T111_CLK_MIN, CAM_USE_XCLKA); ++ ++ /* ++ * Wait at least 70 CLK cycles (w/EXTCLK = 6MHz, or CLK_MIN): ++ * ((1000000 * 70) / 6000000) = aprox 12 us. ++ */ ++ ++ udelay(12); ++ ++ /* Set RESET_BAR to 1 */ ++ gpio_set_value(LEOPARD_RESET_GPIO, 1); ++ ++ /* ++ * Wait at least 100 CLK cycles (w/EXTCLK = 6MHz, or CLK_MIN): ++ * ((1000000 * 100) / 6000000) = aprox 17 us. ++ */ ++ ++ udelay(17); + + break; + +@@ -224,6 +252,17 @@ static int beagle_cam_probe(struct platform_device *pdev) + return PTR_ERR(beagle_mt9t111_2_8v); + } + ++ if (gpio_request(LEOPARD_RESET_GPIO, "cam_rst") != 0) { ++ dev_err(&pdev->dev, "Could not request GPIO %d", ++ LEOPARD_RESET_GPIO); ++ regulator_put(beagle_mt9t111_2_8v); ++ regulator_put(beagle_mt9t111_1_8v); ++ return -ENODEV; ++ } ++ ++ /* set to output mode, default value 0 */ ++ gpio_direction_output(LEOPARD_RESET_GPIO, 0); ++ + printk(KERN_INFO MODULE_NAME ": Driver registration complete \n"); + + return 0; +@@ -238,6 +277,8 @@ static int beagle_cam_remove(struct platform_device *pdev) + regulator_disable(beagle_mt9t111_2_8v); + regulator_put(beagle_mt9t111_2_8v); + ++ gpio_free(LEOPARD_RESET_GPIO); ++ + return 0; + } + +-- +1.6.6.1 + |