diff options
Diffstat (limited to 'drivers/timer')
| -rw-r--r-- | drivers/timer/Kconfig | 7 | ||||
| -rw-r--r-- | drivers/timer/Makefile | 1 | ||||
| -rw-r--r-- | drivers/timer/fttmr010_timer.c | 92 | ||||
| -rw-r--r-- | drivers/timer/tsc_timer.c | 9 |
4 files changed, 109 insertions, 0 deletions
diff --git a/drivers/timer/Kconfig b/drivers/timer/Kconfig index f32bd16227e..915b2af160c 100644 --- a/drivers/timer/Kconfig +++ b/drivers/timer/Kconfig @@ -145,6 +145,13 @@ config DESIGNWARE_APB_TIMER Enables support for the Designware APB Timer driver. This timer is present on Altera SoCFPGA SoCs. +config FTTMR010_TIMER + bool "Faraday Technology timer support" + depends on TIMER + help + Select this to enable support for the timer found on + devices using Faraday Technology's IP. + config GXP_TIMER bool "HPE GXP Timer" depends on TIMER diff --git a/drivers/timer/Makefile b/drivers/timer/Makefile index 3c92113fc6f..cdc20f5e946 100644 --- a/drivers/timer/Makefile +++ b/drivers/timer/Makefile @@ -13,6 +13,7 @@ obj-$(CONFIG_$(SPL_)ATMEL_PIT_TIMER) += atmel_pit_timer.o obj-$(CONFIG_$(SPL_)ATMEL_TCB_TIMER) += atmel_tcb_timer.o obj-$(CONFIG_CADENCE_TTC_TIMER) += cadence-ttc.o obj-$(CONFIG_DESIGNWARE_APB_TIMER) += dw-apb-timer.o +obj-$(CONFIG_FTTMR010_TIMER) += fttmr010_timer.o obj-$(CONFIG_GXP_TIMER) += gxp-timer.o obj-$(CONFIG_MPC83XX_TIMER) += mpc83xx_timer.o obj-$(CONFIG_NOMADIK_MTU_TIMER) += nomadik-mtu-timer.o diff --git a/drivers/timer/fttmr010_timer.c b/drivers/timer/fttmr010_timer.c new file mode 100644 index 00000000000..b6289e64610 --- /dev/null +++ b/drivers/timer/fttmr010_timer.c @@ -0,0 +1,92 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * (C) Copyright 2009 Faraday Technology + * Po-Yu Chuang <ratbert@faraday-tech.com> + * + * 23/08/2022 Port to DM + */ +#include <common.h> +#include <dm.h> +#include <log.h> +#include <timer.h> +#include <asm/io.h> +#include <dm/ofnode.h> +#include <faraday/fttmr010.h> +#include <asm/global_data.h> + +#define TIMER_LOAD_VAL 0xffffffff + +struct fttmr010_timer_priv { + struct fttmr010 __iomem *regs; +}; + +static u64 fttmr010_timer_get_count(struct udevice *dev) +{ + struct fttmr010_timer_priv *priv = dev_get_priv(dev); + struct fttmr010 *tmr = priv->regs; + u32 now = TIMER_LOAD_VAL - readl(&tmr->timer3_counter); + + /* increment tbu if tbl has rolled over */ + if (now < gd->arch.tbl) + gd->arch.tbu++; + gd->arch.tbl = now; + + return ((u64)gd->arch.tbu << 32) | gd->arch.tbl; +} + +static int fttmr010_timer_probe(struct udevice *dev) +{ + struct fttmr010_timer_priv *priv = dev_get_priv(dev); + struct fttmr010 *tmr; + unsigned int cr; + + priv->regs = dev_read_addr_ptr(dev); + if (!priv->regs) + return -EINVAL; + tmr = priv->regs; + + debug("Faraday FTTMR010 timer revision 0x%08X\n", readl(&tmr->revision)); + + /* disable timers */ + writel(0, &tmr->cr); + + /* setup timer */ + writel(TIMER_LOAD_VAL, &tmr->timer3_load); + writel(TIMER_LOAD_VAL, &tmr->timer3_counter); + writel(0, &tmr->timer3_match1); + writel(0, &tmr->timer3_match2); + + /* we don't want timer to issue interrupts */ + writel(FTTMR010_TM3_MATCH1 | + FTTMR010_TM3_MATCH2 | + FTTMR010_TM3_OVERFLOW, + &tmr->interrupt_mask); + + cr = readl(&tmr->cr); + cr |= FTTMR010_TM3_CLOCK; /* use external clock */ + cr |= FTTMR010_TM3_ENABLE; + writel(cr, &tmr->cr); + + gd->arch.tbl = 0; + gd->arch.tbu = 0; + + return 0; +} + +static const struct timer_ops fttmr010_timer_ops = { + .get_count = fttmr010_timer_get_count, +}; + +static const struct udevice_id fttmr010_timer_ids[] = { + { .compatible = "faraday,fttmr010-timer" }, + {} +}; + +U_BOOT_DRIVER(fttmr010_timer) = { + .name = "fttmr010_timer", + .id = UCLASS_TIMER, + .of_match = fttmr010_timer_ids, + .priv_auto = sizeof(struct fttmr010_timer_priv), + .probe = fttmr010_timer_probe, + .ops = &fttmr010_timer_ops, +}; diff --git a/drivers/timer/tsc_timer.c b/drivers/timer/tsc_timer.c index 192c7b71a5a..f86a0b86921 100644 --- a/drivers/timer/tsc_timer.c +++ b/drivers/timer/tsc_timer.c @@ -404,6 +404,15 @@ static void tsc_timer_ensure_setup(bool early) if (!gd->arch.clock_rate) { unsigned long fast_calibrate; + /** + * There is no obvious way to obtain this information from EFI + * boot services. This value was measured on a Framework Laptop + * which has a 12th Gen Intel Core + */ + if (IS_ENABLED(CONFIG_EFI_APP)) { + fast_calibrate = 2750; + goto done; + } fast_calibrate = native_calibrate_tsc(); if (fast_calibrate) goto done; |