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authorAlexandru Gagniuc <mr.nuke.me@gmail.com>2014-01-09 20:45:21 -0600
committerAlexandru Gagniuc <mr.nuke.me@gmail.com>2014-01-13 06:25:01 +0100
commit8e053afa860e254d099b7c2e530cfbbe185ca098 (patch)
tree05411a478d47c8d4dedc04690c2a01e2ae0b06c1
parentabe9b81e838bcf85e60671989815dfab669002ee (diff)
downloadcoreboot-8e053afa860e254d099b7c2e530cfbbe185ca098.tar.xz
cubieboard: Configure system voltages from devicetree
Change-Id: I93bac9bf94f5bafcd3ff0c3d5763b31d3ee9959b Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com> Reviewed-on: http://review.coreboot.org/4640 Tested-by: build bot (Jenkins) Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
-rw-r--r--src/mainboard/cubietech/cubieboard/Kconfig1
-rw-r--r--src/mainboard/cubietech/cubieboard/devicetree.cb9
-rw-r--r--src/mainboard/cubietech/cubieboard/romstage.c58
3 files changed, 68 insertions, 0 deletions
diff --git a/src/mainboard/cubietech/cubieboard/Kconfig b/src/mainboard/cubietech/cubieboard/Kconfig
index 72b797e606..6cb84cfac3 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 1358777032..65ea5ff38c 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 19192cdc40..1b4d886b2a 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();
+
}