diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/power/pmic/Kconfig | 14 | ||||
| -rw-r--r-- | drivers/power/pmic/Makefile | 1 | ||||
| -rw-r--r-- | drivers/power/pmic/fan53555.c | 82 | ||||
| -rw-r--r-- | drivers/power/regulator/Kconfig | 16 | ||||
| -rw-r--r-- | drivers/power/regulator/Makefile | 1 | ||||
| -rw-r--r-- | drivers/power/regulator/fan53555.c | 222 |
6 files changed, 336 insertions, 0 deletions
diff --git a/drivers/power/pmic/Kconfig b/drivers/power/pmic/Kconfig index cba48e12da4..8cf60ebcf3d 100644 --- a/drivers/power/pmic/Kconfig +++ b/drivers/power/pmic/Kconfig @@ -48,6 +48,20 @@ config PMIC_AS3722 interface and is designs to cover most of the power managementment required for a tablets or laptop. +config DM_PMIC_FAN53555 + bool "Enable support for OnSemi FAN53555" + depends on DM_PMIC && DM_REGULATOR && DM_I2C + select DM_REGULATOR_FAN53555 + help + This config enables implementation of driver-model PMIC + uclass features for the FAN53555 regulator. The FAN53555 is + a (family of) single-output regulators that supports + transitioning between two different output voltages based on + an voltage selection pin. + + The driver implements read/write operations for use with the FAN53555 + regulator driver and binds the regulator driver to its node. + config DM_PMIC_PFUZE100 bool "Enable Driver Model for PMIC PFUZE100" depends on DM_PMIC diff --git a/drivers/power/pmic/Makefile b/drivers/power/pmic/Makefile index 29ca4429332..637352ab2b7 100644 --- a/drivers/power/pmic/Makefile +++ b/drivers/power/pmic/Makefile @@ -4,6 +4,7 @@ # Lukasz Majewski <l.majewski@samsung.com> obj-$(CONFIG_DM_PMIC) += pmic-uclass.o +obj-$(CONFIG_DM_PMIC_FAN53555) += fan53555.o obj-$(CONFIG_DM_PMIC_MAX77686) += max77686.o obj-$(CONFIG_DM_PMIC_MAX8998) += max8998.o obj-$(CONFIG_DM_PMIC_MC34708) += mc34708.o diff --git a/drivers/power/pmic/fan53555.c b/drivers/power/pmic/fan53555.c new file mode 100644 index 00000000000..1ca59c5f0c5 --- /dev/null +++ b/drivers/power/pmic/fan53555.c @@ -0,0 +1,82 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * (C) 2018 Theobroma Systems Design und Consulting GmbH + */ + +#include <common.h> +#include <dm.h> +#include <dm/device-internal.h> +#include <dm/lists.h> +#include <i2c.h> +#include <power/pmic.h> +#include <power/regulator.h> + +static int pmic_fan53555_reg_count(struct udevice *dev) +{ + return 1; +}; + +static int pmic_fan53555_read(struct udevice *dev, uint reg, + u8 *buff, int len) +{ + if (dm_i2c_read(dev, reg, buff, len)) { + pr_err("%s: read error for register: %#x!", dev->name, reg); + return -EIO; + } + + return 0; +} + +static int pmic_fan53555_write(struct udevice *dev, uint reg, + const u8 *buff, int len) +{ + if (dm_i2c_write(dev, reg, buff, len)) { + pr_err("%s: write error for register: %#x!", dev->name, reg); + return -EIO; + } + + return 0; +} + +static int pmic_fan53555_bind(struct udevice *dev) +{ + /* + * The FAN53555 has only a single regulator and therefore doesn't + * have a subnode. So we have to rebind a child device (the one + * regulator) here. + */ + + const char *regulator_driver_name = "fan53555_regulator"; + struct udevice *child; + struct driver *drv; + + debug("%s\n", __func__); + + drv = lists_driver_lookup_name(regulator_driver_name); + if (!drv) { + dev_err(dev, "no driver '%s'\n", regulator_driver_name); + return -ENOENT; + } + + return device_bind_with_driver_data(dev, drv, "SW", 0, + dev_ofnode(dev), &child); +}; + +static struct dm_pmic_ops pmic_fan53555_ops = { + .reg_count = pmic_fan53555_reg_count, + .read = pmic_fan53555_read, + .write = pmic_fan53555_write, +}; + +static const struct udevice_id pmic_fan53555_match[] = { + { .compatible = "fcs,fan53555" }, + { }, +}; + +U_BOOT_DRIVER(pmic_fan53555) = { + .name = "pmic_fan53555", + .id = UCLASS_PMIC, + .of_match = pmic_fan53555_match, + .bind = pmic_fan53555_bind, + .ops = &pmic_fan53555_ops, +}; diff --git a/drivers/power/regulator/Kconfig b/drivers/power/regulator/Kconfig index 2561a8a8561..09b311de8bb 100644 --- a/drivers/power/regulator/Kconfig +++ b/drivers/power/regulator/Kconfig @@ -69,6 +69,22 @@ config DM_REGULATOR_MAX77686 features for REGULATOR MAX77686. The driver implements get/set api for: value, enable and mode. +config DM_REGULATOR_FAN53555 + bool "Enable Driver Model for REGULATOR FAN53555" + depends on DM_PMIC_FAN53555 + help + This config enables implementation of driver-model regulator + uclass features for the FAN53555 regulator. The FAN53555 is + a (family of) single-output regulators that supports + transitioning between two different output voltages based on + an voltage selection pin. + + The driver implements a get/set api for the voltage of the + 'normal mode' voltage only. Switching to 'suspend mode' + (i.e. the alternate voltage), disabling output via software, + or switching the mode is not supported by this driver (at + this time). + config DM_REGULATOR_FIXED bool "Enable Driver Model for REGULATOR Fixed value" depends on DM_REGULATOR diff --git a/drivers/power/regulator/Makefile b/drivers/power/regulator/Makefile index a5f5683d6e9..8017045d542 100644 --- a/drivers/power/regulator/Makefile +++ b/drivers/power/regulator/Makefile @@ -10,6 +10,7 @@ obj-$(CONFIG_REGULATOR_AS3722) += as3722_regulator.o obj-$(CONFIG_DM_REGULATOR_MAX77686) += max77686.o obj-$(CONFIG_$(SPL_)DM_PMIC_PFUZE100) += pfuze100.o obj-$(CONFIG_REGULATOR_PWM) += pwm_regulator.o +obj-$(CONFIG_$(SPL_)DM_REGULATOR_FAN53555) += fan53555.o obj-$(CONFIG_$(SPL_)DM_REGULATOR_FIXED) += fixed.o obj-$(CONFIG_$(SPL_)DM_REGULATOR_GPIO) += gpio-regulator.o obj-$(CONFIG_REGULATOR_RK8XX) += rk8xx.o diff --git a/drivers/power/regulator/fan53555.c b/drivers/power/regulator/fan53555.c new file mode 100644 index 00000000000..dbd55023779 --- /dev/null +++ b/drivers/power/regulator/fan53555.c @@ -0,0 +1,222 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * (C) 2018 Theobroma Systems Design und Consulting GmbH + */ + +#include <common.h> +#include <bitfield.h> +#include <errno.h> +#include <dm.h> +#include <fdtdec.h> +#include <i2c.h> +#include <asm/gpio.h> +#include <power/pmic.h> +#include <power/regulator.h> + +/** + * struct ic_types - definition of fan53555-family devices + * + * @die_id: Identifies the DIE_ID (lower nibble of the ID1 register) + * @die_rev: Identifies the DIE_REV (lower nibble of the ID2 register) + * @vsel_min: starting voltage (step 0) in uV + * @vsel_step: increment of the voltage in uV + * + * The voltage ramp (i.e. minimum voltage and step) is selected from the + * combination of 2 nibbles: DIE_ID and DIE_REV. + * + * See http://www.onsemi.com/pub/Collateral/FAN53555-D.pdf for details. + */ +static const struct { + u8 die_id; + u8 die_rev; + u32 vsel_min; + u32 vsel_step; +} ic_types[] = { + { 0x0, 0x3, 600000, 10000 }, /* Option 00 */ + { 0x0, 0xf, 800000, 10000 }, /* Option 13 */ + { 0x0, 0xc, 600000, 12500 }, /* Option 23 */ + { 0x1, 0x3, 600000, 10000 }, /* Option 01 */ + { 0x3, 0x3, 600000, 10000 }, /* Option 03 */ + { 0x4, 0xf, 603000, 12826 }, /* Option 04 */ + { 0x5, 0x3, 600000, 10000 }, /* Option 05 */ + { 0x8, 0x1, 600000, 10000 }, /* Option 08 */ + { 0x8, 0xf, 600000, 10000 }, /* Option 08 */ + { 0xc, 0xf, 603000, 12826 }, /* Option 09 */ +}; + +/* I2C-accessible byte-sized registers */ +enum { + /* Voltage setting */ + FAN53555_VSEL0 = 0x00, + FAN53555_VSEL1, + /* Control register */ + FAN53555_CONTROL, + /* IC Type */ + FAN53555_ID1, + /* IC mask version */ + FAN53555_ID2, + /* Monitor register */ + FAN53555_MONITOR, +}; + +struct fan53555_platdata { + /* Voltage setting register */ + unsigned int vol_reg; + unsigned int sleep_reg; + +}; + +struct fan53555_priv { + /* IC Vendor */ + unsigned int vendor; + /* IC Type and Rev */ + unsigned int die_id; + unsigned int die_rev; + /* Voltage range and step(linear) */ + unsigned int vsel_min; + unsigned int vsel_step; + /* Voltage slew rate limiting */ + unsigned int slew_rate; + /* Sleep voltage cache */ + unsigned int sleep_vol_cache; +}; + +static int fan53555_regulator_ofdata_to_platdata(struct udevice *dev) +{ + struct fan53555_platdata *dev_pdata = dev_get_platdata(dev); + struct dm_regulator_uclass_platdata *uc_pdata = + dev_get_uclass_platdata(dev); + u32 sleep_vsel; + + /* This is a buck regulator */ + uc_pdata->type = REGULATOR_TYPE_BUCK; + + sleep_vsel = dev_read_u32_default(dev, "fcs,suspend-voltage-selector", + FAN53555_VSEL1); + + /* + * Depending on the device-tree settings, the 'normal mode' + * voltage is either controlled by VSEL0 or VSEL1. + */ + switch (sleep_vsel) { + case FAN53555_VSEL0: + dev_pdata->sleep_reg = FAN53555_VSEL0; + dev_pdata->vol_reg = FAN53555_VSEL1; + break; + case FAN53555_VSEL1: + dev_pdata->sleep_reg = FAN53555_VSEL1; + dev_pdata->vol_reg = FAN53555_VSEL0; + break; + default: + pr_err("%s: invalid vsel id %d\n", dev->name, sleep_vsel); + return -EINVAL; + } + + return 0; +} + +static int fan53555_regulator_get_value(struct udevice *dev) +{ + struct fan53555_platdata *pdata = dev_get_platdata(dev); + struct fan53555_priv *priv = dev_get_priv(dev); + int reg; + int voltage; + + /* We only support a single voltage selector (i.e. 'normal' mode). */ + reg = pmic_reg_read(dev->parent, pdata->vol_reg); + if (reg < 0) + return reg; + voltage = priv->vsel_min + (reg & 0x3f) * priv->vsel_step; + + debug("%s: %d uV\n", __func__, voltage); + return voltage; +} + +static int fan53555_regulator_set_value(struct udevice *dev, int uV) +{ + struct fan53555_platdata *pdata = dev_get_platdata(dev); + struct fan53555_priv *priv = dev_get_priv(dev); + u8 vol; + + vol = (uV - priv->vsel_min) / priv->vsel_step; + debug("%s: uV=%d; writing volume %d: %02x\n", + __func__, uV, pdata->vol_reg, vol); + + return pmic_clrsetbits(dev, pdata->vol_reg, GENMASK(6, 0), vol); +} + +static int fan53555_voltages_setup(struct udevice *dev) +{ + struct fan53555_priv *priv = dev_get_priv(dev); + int i; + + /* Init voltage range and step */ + for (i = 0; i < ARRAY_SIZE(ic_types); ++i) { + if (ic_types[i].die_id != priv->die_id) + continue; + + if (ic_types[i].die_rev != priv->die_rev) + continue; + + priv->vsel_min = ic_types[i].vsel_min; + priv->vsel_step = ic_types[i].vsel_step; + + return 0; + } + + pr_err("%s: %s: die id %d rev %d not supported!\n", + dev->name, __func__, priv->die_id, priv->die_rev); + return -EINVAL; +} + +enum { + DIE_ID_SHIFT = 0, + DIE_ID_WIDTH = 4, + DIE_REV_SHIFT = 0, + DIE_REV_WIDTH = 4, +}; + +static int fan53555_probe(struct udevice *dev) +{ + struct fan53555_priv *priv = dev_get_priv(dev); + int ID1, ID2; + + debug("%s\n", __func__); + + /* read chip ID1 and ID2 (two registers, starting at ID1) */ + ID1 = pmic_reg_read(dev->parent, FAN53555_ID1); + if (ID1 < 0) + return ID1; + + ID2 = pmic_reg_read(dev->parent, FAN53555_ID2); + if (ID2 < 0) + return ID2; + + /* extract vendor, die_id and die_rev */ + priv->vendor = bitfield_extract(ID1, 5, 3); + priv->die_id = ID1 & GENMASK(3, 0); + priv->die_rev = ID2 & GENMASK(3, 0); + + if (fan53555_voltages_setup(dev) < 0) + return -ENODATA; + + debug("%s: FAN53555 option %d rev %d detected\n", + __func__, priv->die_id, priv->die_rev); + + return 0; +} + +static const struct dm_regulator_ops fan53555_regulator_ops = { + .get_value = fan53555_regulator_get_value, + .set_value = fan53555_regulator_set_value, +}; + +U_BOOT_DRIVER(fan53555_regulator) = { + .name = "fan53555_regulator", + .id = UCLASS_REGULATOR, + .ops = &fan53555_regulator_ops, + .ofdata_to_platdata = fan53555_regulator_ofdata_to_platdata, + .platdata_auto_alloc_size = sizeof(struct fan53555_platdata), + .priv_auto_alloc_size = sizeof(struct fan53555_priv), + .probe = fan53555_probe, +}; |