Alexandru Gagniuc (mr.nuke.me@gmail.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/4640
-gerrit
commit b7a94a50f108dea3b530ecb0a979be3b6833f13b Author: Alexandru Gagniuc mr.nuke.me@gmail.com Date: Thu Jan 9 20:45:21 2014 -0600
cubieboard: Configure system voltages from devicetree
Change-Id: I93bac9bf94f5bafcd3ff0c3d5763b31d3ee9959b Signed-off-by: Alexandru Gagniuc mr.nuke.me@gmail.com --- src/mainboard/cubietech/cubieboard/Kconfig | 1 + src/mainboard/cubietech/cubieboard/devicetree.cb | 9 ++++ src/mainboard/cubietech/cubieboard/romstage.c | 58 ++++++++++++++++++++++++ 3 files changed, 68 insertions(+)
diff --git a/src/mainboard/cubietech/cubieboard/Kconfig b/src/mainboard/cubietech/cubieboard/Kconfig index 72b797e..6cb84cf 100644 --- a/src/mainboard/cubietech/cubieboard/Kconfig +++ b/src/mainboard/cubietech/cubieboard/Kconfig @@ -5,6 +5,7 @@ config BOARD_SPECIFIC_OPTIONS # dummy select ARCH_ARMV7 select CPU_ALLWINNER_A10 select BOARD_ROMSIZE_KB_4096 + select DRIVER_XPOWERS_AXP209
config MAINBOARD_DIR string diff --git a/src/mainboard/cubietech/cubieboard/devicetree.cb b/src/mainboard/cubietech/cubieboard/devicetree.cb index 1358777..65ea5ff 100644 --- a/src/mainboard/cubietech/cubieboard/devicetree.cb +++ b/src/mainboard/cubietech/cubieboard/devicetree.cb @@ -1,3 +1,12 @@ chip cpu/allwinner/a10 device cpu_cluster 0 on end + + chip drivers/xpowers/axp209 # AXP209 is on I²C 0 + device i2c 0x34 on end + register "dcdc2_voltage_mv" = "1400" # Vcore + register "dcdc3_voltage_mv" = "1250" # DLL Vdd + register "ldo2_voltage_mv" = "3000" # AVCC + register "ldo3_voltage_mv" = "2800" # NC? + register "ldo4_voltage_mv" = "2800" # CSI1-IO-2V8 + end end diff --git a/src/mainboard/cubietech/cubieboard/romstage.c b/src/mainboard/cubietech/cubieboard/romstage.c index 19192cd..1b4d886 100644 --- a/src/mainboard/cubietech/cubieboard/romstage.c +++ b/src/mainboard/cubietech/cubieboard/romstage.c @@ -6,9 +6,67 @@ */
#include <console/console.h> +#include <cpu/allwinner/a10/clock.h> +#include <cpu/allwinner/a10/gpio.h> +#include <cpu/allwinner/a10/twi.h> +#define __SIMPLE_DEVICE__ +#include <device/device.h> +#include <drivers/xpowers/axp209/axp209.h> +#include <drivers/xpowers/axp209/chip.h> + + +#define GPB_TWI0_FUNC 2 +#define GPB_TWI0_PINS ((1 << 0) | (1 << 1)) + +#define AXP209_BUS 0 + +static enum cb_err cubieboard_setup_power(void) +{ + enum cb_err err; + const struct device * pmu; + const struct drivers_xpowers_axp209_config *cfg; + + /* Find the AXP209 in devicetree */ + pmu = dev_find_slot_on_smbus(AXP209_BUS, AXP209_I2C_ADDR); + if (!pmu) { + printk(BIOS_ERR, "AXP209 not found in devicetree.cb\n"); + return CB_ERR; + } + + cfg = pmu->chip_info; + + /* Mux TWI0 pins */ + gpio_set_multipin_func(GPB, GPB_TWI0_PINS, GPB_TWI0_FUNC); + /* Enable TWI0 */ + a1x_periph_clock_enable(A1X_CLKEN_TWI0); + a1x_twi_init(AXP209_BUS, 400000); + + if ((err = axp209_init(AXP209_BUS)) != CB_SUCCESS) { + printk(BIOS_ERR, "PMU initialization failed\n"); + return err; + } + + if ((err = axp209_set_voltages(AXP209_BUS, cfg)) != CB_SUCCESS) { + printk(BIOS_WARNING, "Power setup incomplete: " + "CPU may hang when increasing clock\n"); + return err; + } + + printk(BIOS_SPEW, "VDD CPU (DCDC2): %imv\n", cfg->dcdc2_voltage_mv); + printk(BIOS_SPEW, "VDD DLL (DCDC3): %imv\n", cfg->dcdc3_voltage_mv); + printk(BIOS_SPEW, "AVCC (LDO2) : %imv\n", cfg->ldo2_voltage_mv); + printk(BIOS_SPEW, "CSI1-IO (LDO4) : %imv\n", cfg->ldo4_voltage_mv); + printk(BIOS_SPEW, "(LDO3) : %imv\n", cfg->ldo3_voltage_mv); + + return CB_SUCCESS; +}
void main(void) { console_init(); printk(BIOS_INFO, "You have managed to succesfully load romstage.\n"); + + /* Configure power rails */ + cubieboard_setup_power(); + }