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| author | Stefan Roese <sr@denx.de> | 2016-07-19 07:45:46 +0200 |
|---|---|---|
| committer | Bin Meng <bmeng.cn@gmail.com> | 2016-08-16 11:44:09 +0800 |
| commit | 4cf9e464f78e58117b9a57e1e4e092e609d96b59 (patch) | |
| tree | 7ab70fbffa0469833b1a39eb8ea8dc6d4d5b9cc3 /drivers | |
| parent | d7b935bf62bafdf5fbe4734c7536754948958890 (diff) | |
| download | u-boot-imx-4cf9e464f78e58117b9a57e1e4e092e609d96b59.zip u-boot-imx-4cf9e464f78e58117b9a57e1e4e092e609d96b59.tar.gz u-boot-imx-4cf9e464f78e58117b9a57e1e4e092e609d96b59.tar.bz2 | |
misc: Add simple driver for some Nuvoton NCT6102D devices
This simple driver provides some functions to control some of the
integrated devices. The watchdog is enabled per default. This driver
adds a function to disable the watchdog. Also the internal legacy
UART (io address 0x3f8/0x2f8) is enabled per default.
Signed-off-by: Stefan Roese <sr@denx.de>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Cc: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/misc/Kconfig | 8 | ||||
| -rw-r--r-- | drivers/misc/Makefile | 1 | ||||
| -rw-r--r-- | drivers/misc/nuvoton_nct6102d.c | 56 |
3 files changed, 65 insertions, 0 deletions
diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig index 4af1cbf..8990489 100644 --- a/drivers/misc/Kconfig +++ b/drivers/misc/Kconfig @@ -90,6 +90,14 @@ config MXC_OCOTP Programmable memory pages that are stored on the some Freescale i.MX processors. +config NUVOTON_NCT6102D + bool "Enable Nuvoton NCT6102D Super I/O driver" + help + If you say Y here, you will get support for the Nuvoton + NCT6102D Super I/O driver. This can be used to enable or + disable the legacy UART, the watchdog or other devices + in the Nuvoton Super IO chips on X86 platforms. + config PWRSEQ bool "Enable power-sequencing drivers" depends on DM diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile index dac9d10..c0e5f03 100644 --- a/drivers/misc/Makefile +++ b/drivers/misc/Makefile @@ -24,6 +24,7 @@ obj-$(CONFIG_I2C_EEPROM) += i2c_eeprom.o obj-$(CONFIG_FSL_MC9SDZ60) += mc9sdz60.o obj-$(CONFIG_MXC_OCOTP) += mxc_ocotp.o obj-$(CONFIG_MXS_OCOTP) += mxs_ocotp.o +obj-$(CONFIG_NUVOTON_NCT6102D) += nuvoton_nct6102d.o obj-$(CONFIG_NS87308) += ns87308.o obj-$(CONFIG_PDSP188x) += pdsp188x.o obj-$(CONFIG_$(SPL_)PWRSEQ) += pwrseq-uclass.o diff --git a/drivers/misc/nuvoton_nct6102d.c b/drivers/misc/nuvoton_nct6102d.c new file mode 100644 index 0000000..ced70f1 --- /dev/null +++ b/drivers/misc/nuvoton_nct6102d.c @@ -0,0 +1,56 @@ +/* + * Copyright (C) 2016 Stefan Roese <sr@denx.de> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <nuvoton_nct6102d.h> +#include <asm/io.h> +#include <asm/pnp_def.h> + +static void superio_outb(int reg, int val) +{ + outb(reg, NCT_EFER); + outb(val, NCT_EFDR); +} + +static inline int superio_inb(int reg) +{ + outb(reg, NCT_EFER); + return inb(NCT_EFDR); +} + +static int superio_enter(void) +{ + outb(NCT_ENTRY_KEY, NCT_EFER); /* Enter extended function mode */ + outb(NCT_ENTRY_KEY, NCT_EFER); /* Again according to manual */ + + return 0; +} + +static void superio_select(int ld) +{ + superio_outb(NCT_LD_SELECT_REG, ld); +} + +static void superio_exit(void) +{ + outb(NCT_EXIT_KEY, NCT_EFER); /* Leave extended function mode */ +} + +/* + * The Nuvoton NCT6102D starts per default after reset with both, + * the internal watchdog and the internal legacy UART enabled. This + * code provides a function to disable the watchdog. + */ +int nct6102d_wdt_disable(void) +{ + superio_enter(); + /* Select logical device for WDT */ + superio_select(NCT6102D_LD_WDT); + superio_outb(NCT6102D_WDT_TIMEOUT, 0x00); + superio_exit(); + + return 0; +} |