diff options
Diffstat (limited to 'recipes-kernel/linux/linux-3.12.70/mtrv1/linux-3.12-eeprom-setup-mtr.patch')
| -rw-r--r-- | recipes-kernel/linux/linux-3.12.70/mtrv1/linux-3.12-eeprom-setup-mtr.patch | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/recipes-kernel/linux/linux-3.12.70/mtrv1/linux-3.12-eeprom-setup-mtr.patch b/recipes-kernel/linux/linux-3.12.70/mtrv1/linux-3.12-eeprom-setup-mtr.patch new file mode 100644 index 0000000..9c77e7f --- /dev/null +++ b/recipes-kernel/linux/linux-3.12.70/mtrv1/linux-3.12-eeprom-setup-mtr.patch @@ -0,0 +1,114 @@ +Index: linux-3.12.27/arch/arm/mach-at91/board-dt-sam9.c +=================================================================== +--- linux-3.12.27.orig/arch/arm/mach-at91/board-dt-sam9.c 2014-08-26 07:12:26.000000000 -0500 ++++ linux-3.12.27/arch/arm/mach-at91/board-dt-sam9.c 2014-09-24 09:56:17.283867487 -0500 +@@ -25,6 +25,36 @@ + #include "board.h" + #include "generic.h" + ++#include <linux/mts_at24.h> ++ ++uint8_t mts_id_eeprom[512]; ++ ++EXPORT_SYMBOL(mts_id_eeprom); ++ ++static void mts_id_eeprom_load(struct memory_accessor *macc, void *context) ++{ ++ int tmp; ++ ++ memset(mts_id_eeprom, 0, sizeof(mts_id_eeprom)); ++ ++ tmp = macc->read(macc, mts_id_eeprom, 0, sizeof(mts_id_eeprom)); ++ if (tmp != sizeof(mts_id_eeprom)) { ++ printk(KERN_ERR "sam9x5: id eeprom read failed: %d\n", tmp); ++ } else { ++ printk(KERN_INFO "sam9x5: read %d bytes from id eeprom\n", tmp); ++ } ++} ++ ++struct mts_eeprom_callback id_eeprom_callback = { ++ .address = 0x56, ++ .index = -1, ++ .setup = mts_id_eeprom_load, ++}; ++ ++struct mts_eeprom_callback* mts_eeprom_callback_lookup[] = { ++ &id_eeprom_callback, ++ NULL ++}; + + static const struct of_device_id irq_of_match[] __initconst = { + +Index: linux-3.12.27/drivers/misc/eeprom/at24.c +=================================================================== +--- linux-3.12.27.orig/drivers/misc/eeprom/at24.c 2014-08-26 07:12:26.000000000 -0500 ++++ linux-3.12.27/drivers/misc/eeprom/at24.c 2014-09-23 11:41:52.470331651 -0500 +@@ -24,6 +24,8 @@ + #include <linux/i2c.h> + #include <linux/i2c/at24.h> + ++#include <linux/mts_at24.h> ++ + /* + * I2C EEPROMs from most vendors are inexpensive and mostly interchangeable. + * Differences between different vendor product lines (like Atmel AT24C or +@@ -473,6 +475,23 @@ + chip->page_size = be32_to_cpup(val); + } + } ++ ++static void at24_get_setup(struct i2c_client *client, ++ struct at24_platform_data *chip) ++{ ++ int i; ++ ++ for (i = 0; mts_eeprom_callback_lookup[i] != NULL; i++) { ++ if (mts_eeprom_callback_lookup[i]->address == client->addr) { ++ printk(KERN_INFO "%s: found a match for eeprom at %X\n", __func__, client->addr); ++ chip->setup = mts_eeprom_callback_lookup[i]->setup; ++ if (mts_eeprom_callback_lookup[i]->index > -1) { ++ chip->context = (void*)&mts_eeprom_callback_lookup[i]->index; ++ } ++ break; ++ } ++ } ++} + #else + static void at24_get_ofdata(struct i2c_client *client, + struct at24_platform_data *chip) +@@ -505,12 +524,14 @@ + * is recommended anyhow. + */ + chip.page_size = 1; ++ chip.setup = NULL; ++ chip.context = NULL; + + /* update chipdata if OF is present */ + at24_get_ofdata(client, &chip); + +- chip.setup = NULL; +- chip.context = NULL; ++ /* see if we have a setup callback */ ++ at24_get_setup(client, &chip); + } + + if (!is_power_of_2(chip.byte_len)) +Index: linux-3.12.27/include/linux/mts_at24.h +=================================================================== +--- /dev/null 1970-01-01 00:00:00.000000000 +0000 ++++ linux-3.12.27/include/linux/mts_at24.h 2014-09-23 11:41:52.470331651 -0500 +@@ -0,0 +1,14 @@ ++#ifndef _LINUX_MTSAT24_H ++#define _LINUX_MTSAT24_H ++ ++#include <linux/memory.h> ++ ++struct mts_eeprom_callback { ++ unsigned short address; ++ int index; ++ void (*setup)(struct memory_accessor *, void *context); ++}; ++ ++extern struct mts_eeprom_callback* mts_eeprom_callback_lookup[]; ++ ++#endif /* _LINUX_MTSAT24_H */ |