diff options
Diffstat (limited to 'platforms')
| -rw-r--r-- | platforms/astbmc/common.c | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/platforms/astbmc/common.c b/platforms/astbmc/common.c index 69fa8af..f79a5c5 100644 --- a/platforms/astbmc/common.c +++ b/platforms/astbmc/common.c @@ -149,6 +149,94 @@ static void astbmc_fixup_dt_uart(struct dt_node *lpc) dt_add_property_cells(uart, "ibm,irq-chip-id", dt_get_chip_id(lpc)); } +static struct dt_node *dt_create_i2c_master(struct dt_node *n, uint32_t eng_id) +{ + struct dt_node *i2cm; + + /* Each master registers set is of length 0x20 */ + i2cm = dt_new_addr(n, "i2cm", 0xa0000 + eng_id * 0x20); + if (!i2cm) + return NULL; + + dt_add_property_string(i2cm, "compatible", + "ibm,power8-i2cm"); + dt_add_property_cells(i2cm, "reg", 0xa0000 + eng_id * 0x20, + 0x20); + dt_add_property_cells(i2cm, "bus-speed-khz", 400); + dt_add_property_cells(i2cm, "local-bus-freq-mhz", 50); + dt_add_property_cells(i2cm, "#address-cells", 1); + dt_add_property_cells(i2cm, "#size-cells", 0); + + return i2cm; +} + +static struct dt_node *dt_create_i2c_bus(struct dt_node *i2cm, const char *port_name, + uint32_t port_id) +{ + static struct dt_node *port; + static uint32_t bus_id = 0; + + port = dt_new_addr(i2cm, "i2c-bus", port_id); + if (!port) + return NULL; + + dt_add_property_string(port, "compatible", "ibm,power8-i2c-port"); + dt_add_property_string(port, "port-name", port_name); + dt_add_property_cells(port, "reg", port_id); + dt_add_property_cells(port, "ibm,opal-id", ++bus_id); + dt_add_property_cells(port, "#address-cells", 1); + dt_add_property_cells(port, "#size-cells", 0); + + return port; +} + +static struct dt_node *dt_create_i2c_device(struct dt_node *bus, uint8_t addr, + const char *name, const char *compat, + const char *label) +{ + struct dt_node *dev; + + dev = dt_new_addr(bus, name, addr); + if (!dev) + return NULL; + + dt_add_property_string(dev, "compatible", compat); + dt_add_property_string(dev, "label", label); + dt_add_property_cells(dev, "reg", addr); + dt_add_property_string(dev, "status", "ok"); + + return dev; +} + +static void astbmc_fixup_dt_i2cm(void) +{ + struct proc_chip *c; + struct dt_node *master, *bus; + char name[32]; + + /* + * Look if any i2c is in the device-tree, in which + * case we assume HB did the job + */ + if (dt_find_compatible_node(dt_root, NULL, "ibm,power8-i2cm")) + return; + + /* Create nodes for i2cm1 of chip 0 */ + c = get_chip(0); + assert(c); + + master = dt_create_i2c_master(c->devnode, 1); + assert(master); + sprintf(name,"p8_%08x_e%dp%d\n", c->id, 1, 0); + bus = dt_create_i2c_bus(master, name, 0); + assert(bus); + sprintf(name,"p8_%08x_e%dp%d\n", c->id, 1, 2); + bus = dt_create_i2c_bus(master, name, 2); + assert(bus); + dt_create_i2c_device(bus, 0x50, "eeprom", "atmel,24c64", "system-vpd"); + assert(bus); +} + static void astbmc_fixup_dt(void) { struct dt_node *n, *primary_lpc = NULL; @@ -167,7 +255,11 @@ static void astbmc_fixup_dt(void) /* Fixup the UART, that might be missing from HB */ astbmc_fixup_dt_uart(primary_lpc); + /* BT is not in HB either */ astbmc_fixup_dt_bt(primary_lpc); + + /* Add i2c masters if needed */ + astbmc_fixup_dt_i2cm(); } static void astbmc_fixup_psi_bar(void) |