diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/power/Kconfig | 6 | ||||
| -rw-r--r-- | drivers/power/pmic/Kconfig | 11 | ||||
| -rw-r--r-- | drivers/power/pmic/Makefile | 1 | ||||
| -rw-r--r-- | drivers/power/pmic/pmic-uclass.c | 158 |
4 files changed, 176 insertions, 0 deletions
diff --git a/drivers/power/Kconfig b/drivers/power/Kconfig index f8f0239..d03626e 100644 --- a/drivers/power/Kconfig +++ b/drivers/power/Kconfig @@ -1,3 +1,7 @@ +menu "Power" + +source "drivers/power/pmic/Kconfig" + config AXP221_POWER boolean "axp221 / axp223 pmic support" depends on MACH_SUN6I || MACH_SUN8I @@ -73,3 +77,5 @@ config AXP221_ELDO3_VOLT disable eldo3. On some A31(s) tablets it might be used to supply 1.2V for the SSD2828 chip (converter of parallel LCD interface into MIPI DSI). + +endmenu diff --git a/drivers/power/pmic/Kconfig b/drivers/power/pmic/Kconfig new file mode 100644 index 0000000..d06d632 --- /dev/null +++ b/drivers/power/pmic/Kconfig @@ -0,0 +1,11 @@ +config DM_PMIC + bool "Enable Driver Model for PMIC drivers (UCLASS_PMIC)" + depends on DM + ---help--- + This config enables the driver-model PMIC support. + UCLASS_PMIC - designed to provide an I/O interface for PMIC devices. + For the multi-function PMIC devices, this can be used as parent I/O + device for each IC's interface. Then, each children uses its parent + for read/write. For detailed description, please refer to the files: + - 'drivers/power/pmic/pmic-uclass.c' + - 'include/power/pmic.h' diff --git a/drivers/power/pmic/Makefile b/drivers/power/pmic/Makefile index 985cfdb..594f620 100644 --- a/drivers/power/pmic/Makefile +++ b/drivers/power/pmic/Makefile @@ -5,6 +5,7 @@ # SPDX-License-Identifier: GPL-2.0+ # +obj-$(CONFIG_DM_PMIC) += pmic-uclass.o obj-$(CONFIG_POWER_LTC3676) += pmic_ltc3676.o obj-$(CONFIG_POWER_MAX8998) += pmic_max8998.o obj-$(CONFIG_POWER_MAX8997) += pmic_max8997.o diff --git a/drivers/power/pmic/pmic-uclass.c b/drivers/power/pmic/pmic-uclass.c new file mode 100644 index 0000000..d82d3da --- /dev/null +++ b/drivers/power/pmic/pmic-uclass.c @@ -0,0 +1,158 @@ +/* + * Copyright (C) 2014-2015 Samsung Electronics + * Przemyslaw Marczak <p.marczak@samsung.com> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <fdtdec.h> +#include <errno.h> +#include <dm.h> +#include <dm/lists.h> +#include <dm/device-internal.h> +#include <dm/uclass-internal.h> +#include <power/pmic.h> +#include <linux/ctype.h> + +DECLARE_GLOBAL_DATA_PTR; + +static ulong str_get_num(const char *ptr, const char *maxptr) +{ + if (!ptr || !maxptr) + return 0; + + while (!isdigit(*ptr) && ptr++ < maxptr); + + return simple_strtoul(ptr, NULL, 0); +} + +int pmic_bind_childs(struct udevice *pmic, int offset, + const struct pmic_child_info *child_info) +{ + const struct pmic_child_info *info; + const void *blob = gd->fdt_blob; + struct driver *drv; + struct udevice *child; + const char *node_name; + int node_name_len; + int bind_count = 0; + int node; + int prefix_len; + int ret; + + debug("%s for '%s' at node offset: %d\n", __func__, pmic->name, + pmic->of_offset); + + for (node = fdt_first_subnode(blob, offset); + node > 0; + node = fdt_next_subnode(blob, node)) { + node_name = fdt_get_name(blob, node, &node_name_len); + + debug("* Found child node: '%s' at offset:%d\n", node_name, + node); + + child = NULL; + info = child_info; + while (info->prefix) { + prefix_len = strlen(info->prefix); + if (strncasecmp(info->prefix, node_name, prefix_len) || + !info->driver) { + info++; + continue; + } + + debug(" - compatible prefix: '%s'\n", info->prefix); + + drv = lists_driver_lookup_name(info->driver); + if (!drv) { + debug(" - driver: '%s' not found!\n", + info->driver); + continue; + } + + debug(" - found child driver: '%s'\n", drv->name); + + ret = device_bind(pmic, drv, node_name, NULL, + node, &child); + if (ret) { + debug(" - child binding error: %d\n", ret); + continue; + } + + debug(" - bound child device: '%s'\n", child->name); + + child->driver_data = str_get_num(node_name + + prefix_len, + node_name + + node_name_len); + + debug(" - set 'child->driver_data': %lu\n", + child->driver_data); + break; + } + + if (child) + bind_count++; + else + debug(" - compatible prefix not found\n"); + } + + debug("Bound: %d childs for PMIC: '%s'\n", bind_count, pmic->name); + return bind_count; +} + +int pmic_get(const char *name, struct udevice **devp) +{ + return uclass_get_device_by_name(UCLASS_PMIC, name, devp); +} + +int pmic_reg_count(struct udevice *dev) +{ + const struct dm_pmic_ops *ops = dev_get_driver_ops(dev); + if (!ops) + return -ENOSYS; + + return ops->reg_count; +} + +int pmic_read(struct udevice *dev, uint reg, uint8_t *buffer, int len) +{ + const struct dm_pmic_ops *ops = dev_get_driver_ops(dev); + int ret; + + if (!buffer) + return -EFAULT; + + if (!ops || !ops->read) + return -ENOSYS; + + ret = ops->read(dev, reg, buffer, len); + if (ret) + return ret; + + return 0; +} + +int pmic_write(struct udevice *dev, uint reg, const uint8_t *buffer, int len) +{ + const struct dm_pmic_ops *ops = dev_get_driver_ops(dev); + int ret; + + if (!buffer) + return -EFAULT; + + if (!ops || !ops->write) + return -ENOSYS; + + ret = ops->write(dev, reg, buffer, len); + if (ret) + return ret; + + return 0; +} + +UCLASS_DRIVER(pmic) = { + .id = UCLASS_PMIC, + .name = "pmic", +}; |