This models some sort of interrupt thingy but there are so many abreviations that I cannot find out what it stands for. It is something to do with interrupts.
It supports two operations.
Signed-off-by: Simon Glass sjg@chromium.org ---
drivers/misc/Kconfig | 9 ++++++ drivers/misc/Makefile | 1 + drivers/misc/itss-uclass.c | 34 +++++++++++++++++++++++ include/dm/uclass-id.h | 1 + include/itss.h | 56 ++++++++++++++++++++++++++++++++++++++ 5 files changed, 101 insertions(+) create mode 100644 drivers/misc/itss-uclass.c create mode 100644 include/itss.h
diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig index 74055a35516..62c9e1089db 100644 --- a/drivers/misc/Kconfig +++ b/drivers/misc/Kconfig @@ -194,6 +194,15 @@ config FSL_SEC_MON Security Monitor can be transitioned on any security failures, like software violations or hardware security violations.
+config ITSS + bool "Intel ITSS Interrupt controller" + depends on X86 || SANDBOX + help + This enabled support for the Intel ITSS, a type of interrupt + controller. It is present on apollolake and some other SoCs. The + device has its own uclass since there are several operations + involved. + config JZ4780_EFUSE bool "Ingenic JZ4780 eFUSE support" depends on ARCH_JZ47XX diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile index 90ef92806b9..f715d6d6df5 100644 --- a/drivers/misc/Makefile +++ b/drivers/misc/Makefile @@ -43,6 +43,7 @@ obj-$(CONFIG_GDSYS_SOC) += gdsys_soc.o obj-$(CONFIG_$(SPL_)I2C_EEPROM) += i2c_eeprom.o obj-$(CONFIG_IHS_FPGA) += ihs_fpga.o obj-$(CONFIG_IMX8) += imx8/ +obj-$(CONFIG_ITSS) += itss-uclass.o obj-$(CONFIG_LED_STATUS) += status_led.o obj-$(CONFIG_LED_STATUS_GPIO) += gpio_led.o obj-$(CONFIG_MPC83XX_SERDES) += mpc83xx_serdes.o diff --git a/drivers/misc/itss-uclass.c b/drivers/misc/itss-uclass.c new file mode 100644 index 00000000000..664865cec3f --- /dev/null +++ b/drivers/misc/itss-uclass.c @@ -0,0 +1,34 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * ITSS is a type of interrupt controller used on recent Intel SoC. + * + * Copyright 2019 Google LLC + */ + +#include <dm.h> +#include <itss.h> + +int itss_route_pmc_gpio_gpe(struct udevice *dev, uint pmc_gpe_num) +{ + const struct itss_ops *ops = itss_get_ops(dev); + + if (!ops->route_pmc_gpio_gpe) + return -ENOSYS; + + return ops->route_pmc_gpio_gpe(dev, pmc_gpe_num); +} + +int itss_set_irq_polarity(struct udevice *dev, uint irq, bool active_low) +{ + const struct itss_ops *ops = itss_get_ops(dev); + + if (!ops->set_irq_polarity) + return -ENOSYS; + + return ops->set_irq_polarity(dev, irq, active_low); +} + +UCLASS_DRIVER(itss) = { + .id = UCLASS_ITSS, + .name = "itss", +}; diff --git a/include/dm/uclass-id.h b/include/dm/uclass-id.h index 496570ff47d..892c746940d 100644 --- a/include/dm/uclass-id.h +++ b/include/dm/uclass-id.h @@ -54,6 +54,7 @@ enum uclass_id { UCLASS_I2S, /* I2S bus */ UCLASS_IDE, /* IDE device */ UCLASS_IRQ, /* Interrupt controller */ + UCLASS_ITSS, /* Intel interrupt thingy */ UCLASS_KEYBOARD, /* Keyboard input device */ UCLASS_LED, /* Light-emitting diode (LED) */ UCLASS_LPC, /* x86 'low pin count' interface */ diff --git a/include/itss.h b/include/itss.h new file mode 100644 index 00000000000..1a282cbac56 --- /dev/null +++ b/include/itss.h @@ -0,0 +1,56 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * ITSS is a type of interrupt controller used on recent Intel SoC. + * + * Copyright 2019 Google LLC + */ + +#ifndef __ITSS_H +#define __ITSS_H + +/** + * struct itss_ops - Operations for the ITSS + */ +struct itss_ops { + /** + * route_pmc_gpio_gpe() - Get the GPIO for an event + * + * @dev: ITSS device + * @pmc_gpe_num: Event number to check + * @returns GPIO for the event, or -ENOENT if none + */ + int (*route_pmc_gpio_gpe)(struct udevice *dev, uint pmc_gpe_num); + + /** + * set_irq_polarity() - Set the IRQ polarity + * + * @dev: ITSS device + * @irq: Interrupt number to set + * @active_low: true if active low, false for active high + * @return 0 if OK, -EINVAL if @irq is invalid + */ + int (*set_irq_polarity)(struct udevice *dev, uint irq, bool active_low); +}; + +#define itss_get_ops(dev) ((struct itss_ops *)(dev)->driver->ops) + +/** + * itss_route_pmc_gpio_gpe() - Get the GPIO for an event + * + * @dev: ITSS device + * @pmc_gpe_num: Event number to check + * @returns GPIO for the event, or -ENOENT if none + */ +int itss_route_pmc_gpio_gpe(struct udevice *dev, uint pmc_gpe_num); + +/** + * set_irq_polarity() - Set the IRQ polarity + * + * @dev: ITSS device + * @irq: Interrupt number to set + * @active_low: true if active low, false for active high + * @return 0 if OK, -EINVAL if @irq is invalid + */ +int itss_set_irq_polarity(struct udevice *dev, uint irq, bool active_low); + +#endif