diff options
Diffstat (limited to 'arch/arm/mach-mx5/pm_da9053.c')
| -rw-r--r-- | arch/arm/mach-mx5/pm_da9053.c | 232 |
1 files changed, 232 insertions, 0 deletions
diff --git a/arch/arm/mach-mx5/pm_da9053.c b/arch/arm/mach-mx5/pm_da9053.c new file mode 100644 index 000000000000..1313aa78d8c3 --- /dev/null +++ b/arch/arm/mach-mx5/pm_da9053.c @@ -0,0 +1,232 @@ +/* + * Copyright (C) 2012 Freescale Semiconductor, Inc. All Rights Reserved. + */ + +/* + * 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., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + + +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/errno.h> +#include <linux/err.h> +#include <linux/delay.h> +#include <linux/i2c.h> +#include <linux/io.h> +#include <linux/clk.h> +#include <linux/mfd/da9052/reg.h> + +#include <asm/mach-types.h> +#include <mach/hardware.h> +#include <mach/i2c.h> +#include "pmic.h" + +/** Defines ******************************************************************** +*******************************************************************************/ +/* have to hard-code the preset voltage here for they share the register +as the normal setting on Da9053 */ +/* preset buck core to 850 mv */ +#define BUCKCORE_SUSPEND_PRESET 0xCE +/* preset buck core to 950 mv */ +#define BUCKPRO_SUSPEND_PRESET 0xD2 +/* preset ldo6 to 1200 mv */ +#define LDO6_SUSPEND_PRESET 0xC0 +/* preset ldo10 to 1200 mv */ +#define iLDO10_SUSPEND_PRESET 0xC0 +/* set VUSB 2V5 active during suspend */ +#define BUCKPERI_SUSPEND_SW_STEP 0x50 +/* restore VUSB 2V5 active after suspend */ +#define BUCKPERI_RESTORE_SW_STEP 0x55 +/* restore VUSB 2V5 power supply after suspend */ +#define SUPPLY_RESTORE_VPERISW_EN 0x20 +#define CONF_BIT 0x80 + +#define DA9053_SLEEP_DELAY 0x1f +#define DA9052_CONTROLC_SMD_SET 0x62 +#define DA9052_GPIO0809_SMD_SET 0x18 +#define DA9052_ID1415_SMD_SET 0x1 +#define DA9052_GPI9_IRQ_MASK 0x2 +#define DA9052_ALARM_IRQ_EN (0x1<<6) +#define DA9052_SEQ_RDY_IRQ_MASK (0x1<<6) + +static u8 volt_settings[DA9052_LDO10_REG - DA9052_BUCKCORE_REG + 1]; + +static void pm_da9053_read_reg(u8 reg, u8 *value) +{ + unsigned char buf[2] = {0, 0}; + struct i2c_msg i2cmsg[2]; + buf[0] = reg; + i2cmsg[0].addr = 0x48 ; + i2cmsg[0].len = 1; + i2cmsg[0].buf = &buf[0]; + + i2cmsg[0].flags = 0; + + i2cmsg[1].addr = 0x48 ; + i2cmsg[1].len = 1; + i2cmsg[1].buf = &buf[1]; + + i2cmsg[1].flags = I2C_M_RD; + + pm_i2c_imx_xfer(i2cmsg, 2); + *value = buf[1]; +} + +static void pm_da9053_write_reg(u8 reg, u8 value) +{ + unsigned char buf[2] = {0, 0}; + struct i2c_msg i2cmsg[2]; + buf[0] = reg; + buf[1] = value; + i2cmsg[0].addr = 0x48 ; + i2cmsg[0].len = 2; + i2cmsg[0].buf = &buf[0]; + i2cmsg[0].flags = 0; + pm_i2c_imx_xfer(i2cmsg, 1); +} + +static void pm_da9053_preset_voltage(void) +{ + u8 reg, data; + for (reg = DA9052_BUCKCORE_REG; + reg <= DA9052_LDO10_REG; reg++) { + pm_da9053_read_reg(reg, &data); + volt_settings[reg - DA9052_BUCKCORE_REG] = data; + data |= CONF_BIT; + pm_da9053_write_reg(reg, data); + } + pm_da9053_write_reg(DA9052_BUCKCORE_REG, BUCKCORE_SUSPEND_PRESET); + pm_da9053_write_reg(DA9052_BUCKPRO_REG, BUCKPRO_SUSPEND_PRESET); + pm_da9053_write_reg(DA9052_LDO6_REG, LDO6_SUSPEND_PRESET); + pm_da9053_write_reg(DA9052_LDO10_REG, iLDO10_SUSPEND_PRESET); + pm_da9053_write_reg(DA9052_ID1213_REG, BUCKPERI_SUSPEND_SW_STEP); +} + +#if 0 +static void pm_da9053_dump(int start, int end) +{ + u8 reg, data; + for (reg = start; reg <= end; reg++) { + pm_da9053_read_reg(reg, &data); + pr_info("reg %u = 0x%2x\n", + reg, data); + } +} +#endif + +int da9053_suspend_cmd_sw(void) +{ + unsigned char buf[2] = {0, 0}; + struct clk *i2c_clk; + u8 data; + buf[0] = 29; + + i2c_clk = clk_get(NULL, "i2c_clk"); + if (IS_ERR(i2c_clk)) { + pr_err("unable to get i2c clk\n"); + return PTR_ERR(i2c_clk); + } + clk_enable(i2c_clk); + + pm_da9053_preset_voltage(); + + pm_da9053_read_reg(DA9052_ID01_REG, &data); + data &= ~(DA9052_ID01_DEFSUPPLY | DA9052_ID01_nRESMODE); + pm_da9053_write_reg(DA9052_ID01_REG, data); + + pm_da9053_write_reg(DA9052_SEQB_REG, DA9053_SLEEP_DELAY); + + pm_da9053_read_reg(DA9052_CONTROLB_REG, &data); + data |= DA9052_CONTROLB_DEEPSLEEP; + pm_da9053_write_reg(DA9052_CONTROLB_REG, data); + + clk_disable(i2c_clk); + clk_put(i2c_clk); + return 0; +} + +int da9053_suspend_cmd_hw(void) +{ + unsigned char buf[2] = {0, 0}; + struct clk *i2c_clk; + u8 data; + buf[0] = 29; + + i2c_clk = clk_get(NULL, "i2c_clk"); + if (IS_ERR(i2c_clk)) { + pr_err("unable to get i2c clk\n"); + return PTR_ERR(i2c_clk); + } + clk_enable(i2c_clk); + + pm_da9053_preset_voltage(); + pm_da9053_write_reg(DA9052_CONTROLC_REG, + DA9052_CONTROLC_SMD_SET); + + pm_da9053_read_reg(DA9052_ID01_REG, &data); + data &= ~(DA9052_ID01_DEFSUPPLY | DA9052_ID01_nRESMODE); + pm_da9053_write_reg(DA9052_ID01_REG, data); + + pm_da9053_write_reg(DA9052_GPIO0809_REG, + DA9052_GPIO0809_SMD_SET); + pm_da9053_read_reg(DA9052_IRQMASKD_REG, &data); + data |= DA9052_GPI9_IRQ_MASK; + pm_da9053_write_reg(DA9052_IRQMASKD_REG, data); +#ifdef CONFIG_RTC_DRV_DA9052 + pm_da9053_read_reg(DA9052_ALARMY_REG, &data); + data |= DA9052_ALARM_IRQ_EN; + pm_da9053_write_reg(DA9052_ALARMY_REG, data); +#endif + /* Mask SEQ_RDY_IRQ to avoid some suspend/resume issues */ + pm_da9053_read_reg(DA9052_IRQMASKA_REG, &data); + data |= DA9052_SEQ_RDY_IRQ_MASK; + pm_da9053_write_reg(DA9052_IRQMASKA_REG, data); + + pm_da9053_read_reg(DA9052_ID1415_REG, &data); + data &= 0xf0; + data |= DA9052_ID1415_SMD_SET; + pm_da9053_write_reg(DA9052_ID1415_REG, data); + + pm_da9053_write_reg(DA9052_SEQTIMER_REG, 0); + /* pm_da9053_write_reg(DA9052_SEQB_REG, 0x1f); */ + + clk_disable(i2c_clk); + clk_put(i2c_clk); + return 0; +} + +int da9053_restore_volt_settings(void) +{ + u8 data; + struct clk *i2c_clk; + + i2c_clk = clk_get(NULL, "i2c_clk"); + if (IS_ERR(i2c_clk)) { + pr_err("unable to get i2c clk\n"); + return PTR_ERR(i2c_clk); + } + clk_enable(i2c_clk); + + pm_da9053_write_reg(DA9052_ID1213_REG, BUCKPERI_RESTORE_SW_STEP); + pm_da9053_read_reg(DA9052_SUPPLY_REG, &data); + data |= SUPPLY_RESTORE_VPERISW_EN; + pm_da9053_write_reg(DA9052_SUPPLY_REG, data); + + clk_disable(i2c_clk); + clk_put(i2c_clk); + return 0; +} |