Some devices need special sequences to be used when starting up. Add a uclass for this. Drivers can be added to provide specific features as needed.
Signed-off-by: Simon Glass sjg@chromium.org ---
Changes in v9: None Changes in v2: None
drivers/misc/Kconfig | 18 ++++++++++++++++++ drivers/misc/Makefile | 1 + drivers/misc/pwrseq-uclass.c | 24 ++++++++++++++++++++++++ include/dm/uclass-id.h | 1 + include/pwrseq.h | 18 ++++++++++++++++++ 5 files changed, 62 insertions(+) create mode 100644 drivers/misc/pwrseq-uclass.c create mode 100644 include/pwrseq.h
diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig index b92da4e..cba2363 100644 --- a/drivers/misc/Kconfig +++ b/drivers/misc/Kconfig @@ -90,6 +90,24 @@ config MXC_OCOTP Programmable memory pages that are stored on the some Freescale i.MX processors.
+config PWRSEQ + bool "Enable power-sequencing drivers" + depends on DM + help + Power-sequencing drivers provide support for controlling power for + devices. They are typically referenced by a phandle from another + device. When the device is started up, its power sequence can be + initiated. + +config SPL_PWRSEQ + bool "Enable power-sequencing drivers for SPL" + depends on PWRSEQ + help + Power-sequencing drivers provide support for controlling power for + devices. They are typically referenced by a phandle from another + device. When the device is started up, its power sequence can be + initiated. + config PCA9551_LED bool "Enable PCA9551 LED driver" help diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile index aa137f5..fc8eb6f 100644 --- a/drivers/misc/Makefile +++ b/drivers/misc/Makefile @@ -24,6 +24,7 @@ obj-$(CONFIG_MXC_OCOTP) += mxc_ocotp.o obj-$(CONFIG_MXS_OCOTP) += mxs_ocotp.o obj-$(CONFIG_NS87308) += ns87308.o obj-$(CONFIG_PDSP188x) += pdsp188x.o +obj-$(CONFIG_$(SPL_)PWRSEQ) += pwrseq-uclass.o obj-$(CONFIG_SANDBOX) += reset_sandbox.o ifdef CONFIG_DM_I2C obj-$(CONFIG_SANDBOX) += i2c_eeprom_emul.o diff --git a/drivers/misc/pwrseq-uclass.c b/drivers/misc/pwrseq-uclass.c new file mode 100644 index 0000000..8ed2ad4 --- /dev/null +++ b/drivers/misc/pwrseq-uclass.c @@ -0,0 +1,24 @@ +/* + * Copyright (c) 2015 Google, Inc + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <dm.h> +#include <pwrseq.h> + +int pwrseq_set_power(struct udevice *dev, bool enable) +{ + struct pwrseq_ops *ops = pwrseq_get_ops(dev); + + if (!ops->set_power) + return -ENOSYS; + + return ops->set_power(dev, enable); +} + +UCLASS_DRIVER(pwrseq) = { + .id = UCLASS_PWRSEQ, + .name = "pwrseq", +}; diff --git a/include/dm/uclass-id.h b/include/dm/uclass-id.h index a0a3a79..b5f43ae 100644 --- a/include/dm/uclass-id.h +++ b/include/dm/uclass-id.h @@ -51,6 +51,7 @@ enum uclass_id { UCLASS_PINCTRL, /* Pinctrl (pin muxing/configuration) device */ UCLASS_PINCONFIG, /* Pin configuration node device */ UCLASS_PMIC, /* PMIC I/O device */ + UCLASS_PWRSEQ, /* Power sequence device */ UCLASS_REGULATOR, /* Regulator device */ UCLASS_RESET, /* Reset device */ UCLASS_REMOTEPROC, /* Remote Processor device */ diff --git a/include/pwrseq.h b/include/pwrseq.h new file mode 100644 index 0000000..b934f29 --- /dev/null +++ b/include/pwrseq.h @@ -0,0 +1,18 @@ +/* + * Copyright (c) 2013 Google, Inc + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#ifndef __pwrseq_h +#define __pwrseq_h + +struct pwrseq_ops { + int (*set_power)(struct udevice *dev, bool enable); +}; + +#define pwrseq_get_ops(dev) ((struct pwrseq_ops *)(dev)->driver->ops) + +int pwrseq_set_power(struct udevice *dev, bool enable); + +#endif