diff options
Diffstat (limited to 'packages/linux/linux-2.6.22+2.6.23-rc5/ts72xx/ep93xx-i2c.diff')
| -rw-r--r-- | packages/linux/linux-2.6.22+2.6.23-rc5/ts72xx/ep93xx-i2c.diff | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/packages/linux/linux-2.6.22+2.6.23-rc5/ts72xx/ep93xx-i2c.diff b/packages/linux/linux-2.6.22+2.6.23-rc5/ts72xx/ep93xx-i2c.diff new file mode 100644 index 0000000000..bf4622b1db --- /dev/null +++ b/packages/linux/linux-2.6.22+2.6.23-rc5/ts72xx/ep93xx-i2c.diff @@ -0,0 +1,110 @@ + +Instantiate the ep93xx gpio i2c bus driver in the generic ep93xx +code. + +Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org> + +Index: linux-2.6.23-rc5/arch/arm/mach-ep93xx/core.c +=================================================================== +--- linux-2.6.23-rc5.orig/arch/arm/mach-ep93xx/core.c 2007-09-04 02:25:36.000000000 +0200 ++++ linux-2.6.23-rc5/arch/arm/mach-ep93xx/core.c 2007-09-04 02:28:12.000000000 +0200 +@@ -509,6 +509,52 @@ + }; + + ++static DEFINE_MUTEX(eeclk_eedat_mutex); ++static int i2c_transaction_in_progress; ++ ++static void ep93xx_i2c_start_condition(void *cookie) ++{ ++ if (!i2c_transaction_in_progress) { ++ mutex_lock(&eeclk_eedat_mutex); ++ i2c_transaction_in_progress = 1; ++ } ++} ++ ++static void ep93xx_i2c_stop_condition(void *cookie) ++{ ++ if (i2c_transaction_in_progress) { ++ mutex_unlock(&eeclk_eedat_mutex); ++ i2c_transaction_in_progress = 0; ++ } else { ++ printk(KERN_WARNING "ep93xx: i2c stop without start??\n"); ++ } ++} ++ ++static struct ep93xx_i2c_data ep93xx_i2c_gpio_data = { ++ .sda_pin = EP93XX_GPIO_LINE_EEDAT, ++ .scl_pin = EP93XX_GPIO_LINE_EECLK, ++ .start = ep93xx_i2c_start_condition, ++ .stop = ep93xx_i2c_stop_condition, ++}; ++ ++static struct platform_device ep93xx_i2c_device = { ++ .name = "ep93xx-i2c", ++ .id = 0, ++ .dev.platform_data = &ep93xx_i2c_gpio_data, ++ .num_resources = 0, ++}; ++ ++void eeclk_eedat_claim(void) ++{ ++ mutex_lock(&eeclk_eedat_mutex); ++} ++ ++void eeclk_eedat_release(void) ++{ ++ mutex_unlock(&eeclk_eedat_mutex); ++} ++ ++ + void __init ep93xx_init_devices(void) + { + unsigned int v; +@@ -521,10 +567,20 @@ + __raw_writel(0xaa, EP93XX_SYSCON_SWLOCK); + __raw_writel(v, EP93XX_SYSCON_DEVICE_CONFIG); + ++ /* ++ * When EECLK/EEDAT are in open drain mode (EEDRIVE=0b11), ++ * writing a 1 to their Data Register bits causes subsequent ++ * reads from the Data Direction Register to return 'input', ++ * which confuses gpio_line_config(). So, we use CMOS drive ++ * mode instead. ++ */ ++ __raw_writel(0, EP93XX_GPIO_EEDRIVE); ++ + amba_device_register(&uart1_device, &iomem_resource); + amba_device_register(&uart2_device, &iomem_resource); + amba_device_register(&uart3_device, &iomem_resource); + + platform_device_register(&ep93xx_rtc_device); + platform_device_register(&ep93xx_ohci_device); ++ platform_device_register(&ep93xx_i2c_device); + } +Index: linux-2.6.23-rc5/include/asm-arm/arch-ep93xx/ep93xx-regs.h +=================================================================== +--- linux-2.6.23-rc5.orig/include/asm-arm/arch-ep93xx/ep93xx-regs.h 2007-09-04 02:25:36.000000000 +0200 ++++ linux-2.6.23-rc5/include/asm-arm/arch-ep93xx/ep93xx-regs.h 2007-09-04 02:28:10.000000000 +0200 +@@ -91,6 +91,7 @@ + #define EP93XX_GPIO_B_INT_ENABLE EP93XX_GPIO_REG(0xb8) + #define EP93XX_GPIO_B_INT_STATUS EP93XX_GPIO_REG(0xbc) + #define EP93XX_GPIO_B_INT_DEBOUNCE EP93XX_GPIO_REG(0xc4) ++#define EP93XX_GPIO_EEDRIVE EP93XX_GPIO_REG(0xc8) + + #define EP93XX_AAC_BASE (EP93XX_APB_VIRT_BASE + 0x00080000) + +Index: linux-2.6.23-rc5/include/asm-arm/arch-ep93xx/platform.h +=================================================================== +--- linux-2.6.23-rc5.orig/include/asm-arm/arch-ep93xx/platform.h 2007-09-04 02:26:20.000000000 +0200 ++++ linux-2.6.23-rc5/include/asm-arm/arch-ep93xx/platform.h 2007-09-04 02:26:38.000000000 +0200 +@@ -10,6 +10,9 @@ + void ep93xx_init_devices(void); + extern struct sys_timer ep93xx_timer; + ++void eeclk_eedat_claim(void); ++void eeclk_eedat_release(void); ++ + struct ep93xx_eth_data + { + unsigned char dev_addr[6]; |