From mboxrd@z Thu Jan 1 00:00:00 1970 From: Luka Perkov Date: Sun, 25 Nov 2012 15:44:47 +0100 Subject: [U-Boot] [PATCH 05/22] power: Add AXP209 Power Management controller (I2C) In-Reply-To: <1353843579.17518.16.camel@home.hno.se> References: <1353843579.17518.16.camel@home.hno.se> Message-ID: <20121125144447-9180@mutt-kz> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de Hi Henrik, On Sun, Nov 25, 2012 at 12:39:39PM +0100, Henrik Nordstr?m wrote: > This adds support for AXP209 Power Management controller, > used by most sunxi (Allwinner A10/A13) based boards. > > From: Henrik Nordstrom > Signed-off-by: Henrik Nordstrom > Signed-off-by: Stefan Roese > --- > drivers/power/Makefile | 1 + > drivers/power/axp209.c | 183 ++++++++++++++++++++++++++++++++++++++++++++++++ > include/axp209.h | 29 ++++++++ > 3 files changed, 213 insertions(+), 0 deletions(-) > create mode 100644 drivers/power/axp209.c > create mode 100644 include/axp209.h > > diff --git a/drivers/power/Makefile b/drivers/power/Makefile > index 8c71901..ad768ff 100644 > --- a/drivers/power/Makefile > +++ b/drivers/power/Makefile > @@ -25,6 +25,7 @@ include $(TOPDIR)/config.mk > > LIB := $(obj)libpower.o > > +COBJS-$(CONFIG_AXP209_POWER) += axp209.o > COBJS-$(CONFIG_FTPMU010_POWER) += ftpmu010.o > COBJS-$(CONFIG_TPS6586X_POWER) += tps6586x.o > COBJS-$(CONFIG_TWL4030_POWER) += twl4030.o > diff --git a/drivers/power/axp209.c b/drivers/power/axp209.c > new file mode 100644 > index 0000000..be98d80 > --- /dev/null > +++ b/drivers/power/axp209.c > @@ -0,0 +1,183 @@ > +/* > + * (C) Copyright 2012 > + * Henrik Nordstrom > + * > + * See file CREDITS for list of people who contributed to this > + * project. > + * > + * This program is free software; you can redistribute it and/or > + * modify it under the terms of the GNU General Public License as > + * published by the Free Software Foundation; either version 2 of > + * the License, or (at your option) any later version. > + * > + * This program is distributed in the hope that it will be useful, > + * but WITHOUT ANY WARRANTY; without even the implied warranty of > + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the > + * GNU General Public License for more details. > + * > + * You should have received a copy of the GNU General Public License > + * along with this program; if not, write to the Free Software > + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, > + * MA 02111-1307 USA > + */ > + > +#include > +#include > +#include > + > +enum axp209_reg { > + AXP209_CHIP_VERSION = 0x3, > + AXP209_DCDC2_VOLTAGE = 0x23, > + AXP209_DCDC3_VOLTAGE = 0x27, > + AXP209_LDO24_VOLTAGE = 0x28, > + AXP209_LDO3_VOLTAGE = 0x29, > + AXP209_SHUTDOWN = 0x32, > +}; > + > +int axp209_write(enum axp209_reg reg, u8 val) > +{ > + return i2c_write(0x34, reg, 1, &val, 1); > +} > + > +int axp209_read(enum axp209_reg reg, u8 *val) > +{ > + return i2c_read(0x34, reg, 1, val, 1); > +} > + > +int axp209_set_dcdc2(int mvolt) > +{ > + int cfg = (mvolt - 700) / 25; > + int rc; > + u8 current; > + > + if (cfg < 0) > + cfg = 0; > + if (cfg > (1 << 6) - 1) > + cfg = (1 << 6) - 1; > + > + /* Do we really need to be this gentle? It has built-in voltage slope */ > + while ((rc = axp209_read(AXP209_DCDC2_VOLTAGE, ¤t)) == 0 > + && current != cfg) { > + if (current < cfg) > + current++; > + else > + current--; > + > + rc = axp209_write(AXP209_DCDC2_VOLTAGE, current); > + if (rc) > + break; > + } > + > + return rc; > +} > + > +int axp209_set_dcdc3(int mvolt) > +{ > + int cfg = (mvolt - 700) / 25; > + u8 reg; > + int rc; > + > + if (cfg < 0) > + cfg = 0; > + if (cfg > (1 << 7) - 1) > + cfg = (1 << 7) - 1; > + > + rc = axp209_write(AXP209_DCDC3_VOLTAGE, cfg); > + rc |= axp209_read(AXP209_DCDC3_VOLTAGE, ®); > + > + return rc; > +} > + > +int axp209_set_ldo2(int mvolt) > +{ > + int cfg = (mvolt - 1800) / 100; > + int rc; > + u8 reg; > + > + if (cfg < 0) > + cfg = 0; > + if (cfg > 15) > + cfg = 15; > + > + rc = axp209_read(AXP209_LDO24_VOLTAGE, ®); > + if (rc) > + return rc; > + > + reg = (reg & 0x0f) | (cfg << 4); > + rc = axp209_write(AXP209_LDO24_VOLTAGE, reg); > + if (rc) > + return rc; > + > + return 0; > +} > + > +int axp209_set_ldo3(int mvolt) > +{ > + int cfg = (mvolt - 700) / 25; > + > + if (cfg < 0) > + cfg = 0; > + if (cfg > 127) > + cfg = 127; > + if (mvolt == -1) > + cfg = 0x80; /* detemined by LDO3IN pin */ > + > + return axp209_write(AXP209_LDO3_VOLTAGE, cfg); > +} > + > +int axp209_set_ldo4(int mvolt) > +{ > + int cfg = (mvolt - 1800) / 100; > + int rc; > + static const int vindex[] = { > + 1250, 1300, 1400, 1500, 1600, 1700, 1800, 1900, 2000, 2500, > + 2700, 2800, 3000, 3100, 3200, 3300 > + }; > + u8 reg; > + > + /* Translate mvolt to register cfg value, requested <= selected */ > + for (cfg = 0; mvolt < vindex[cfg] && cfg < 15; cfg++) > + ; > + > + rc = axp209_read(AXP209_LDO24_VOLTAGE, ®); > + if (rc) > + return rc; > + > + /* LDO4 configuration is in lower 4 bits */ > + reg = (reg & 0xf0) | (cfg << 0); > + rc = axp209_write(AXP209_LDO24_VOLTAGE, reg); > + if (rc) > + return rc; > + > + return 0; > +} > + > +void axp209_poweroff(void) > +{ > + u8 val; > + > + if (axp209_read(AXP209_SHUTDOWN, &val) != 0) > + return; > + > + val |= 1 << 7; > + > + if (axp209_write(AXP209_SHUTDOWN, val) != 0) > + return; > + > + udelay(10000); /* wait for power to drain */ > +} > + > +int axp209_init(void) > +{ > + u8 ver; > + int rc; > + > + rc = axp209_read(AXP209_CHIP_VERSION, &ver); > + if (rc) > + return rc; > + > + if (ver != 0x21) > + return -1; > + > + return 0; > +} > diff --git a/include/axp209.h b/include/axp209.h > new file mode 100644 > index 0000000..61338ac > --- /dev/null > +++ b/include/axp209.h > @@ -0,0 +1,29 @@ > +/* > + * (C) Copyright 2012 Henrik Nordstrom > + * > + * See file CREDITS for list of people who contributed to this > + * project. > + * > + * This program is free software; you can redistribute it and/or > + * modify it under the terms of the GNU General Public License as > + * published by the Free Software Foundation; either version 2 of > + * the License, or (at your option) any later version. > + * > + * This program is distributed in the hope that it will be useful, > + * but WITHOUT ANY WARRANTY; without even the implied warranty of > + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the > + * GNU General Public License for more details. > + * > + * You should have received a copy of the GNU General Public License > + * along with this program; if not, write to the Free Software > + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, > + * MA 02111-1307 USA > + */ > + Please add: #ifndef #define > +extern int axp209_set_dcdc2(int mvolt); > +extern int axp209_set_dcdc3(int mvolt); > +extern int axp209_set_ldo2(int mvolt); > +extern int axp209_set_ldo3(int mvolt); > +extern int axp209_set_ldo4(int mvolt); > +extern void axp209_poweroff(void); > +extern int axp209_init(void); And end with: #endif > -- > 1.7.7.6 Luka