diff options
author | Arnd Bergmann <arnd@arndb.de> | 2019-03-01 15:21:04 +0100 |
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committer | Arnd Bergmann <arnd@arndb.de> | 2019-03-01 15:21:04 +0100 |
commit | c889e2a0b053703be7e7591c9a574975440e5502 (patch) | |
tree | 09810287d9ed4d57e133ba4184deebb0db14c283 /drivers | |
parent | ee036df9bd1d3ca8b138c6376792c0b72f96a903 (diff) | |
parent | 2781204594c2705868c1f9388f80ae6cdcdabd22 (diff) | |
download | linux-c889e2a0b053703be7e7591c9a574975440e5502.tar.bz2 |
Merge branch 'milbeaut/newsoc' into arm/newsoc
Sugaya Taichi <sugaya.taichi@socionext.com> explains:
Here is the series of patches the initial support for SC2000(M10V) of
Milbeaut SoCs. "M10V" is the internal name of SC2000, so commonly used in
source code.
SC2000 is a SoC of the Milbeaut series. equipped with a DSP optimized for
computer vision. It also features advanced functionalities such as 360-degree,
real-time spherical stitching with multi cameras, image stabilization for
without mechanical gimbals, and rolling shutter correction. More detail is
below:
https://www.socionext.com/en/products/assp/milbeaut/SC2000.html
Specifications for developers are below:
- Quad-core 32bit Cortex-A7 on ARMv7-A architecture
- NEON support
- DSP
- GPU
- MAX 3GB DDR3
- Cortex-M0 for power control
- NAND Flash Interface
- SD UHS-I
- SD UHS-II
- SDIO
- USB2.0 HOST / Device
- USB3.0 HOST / Device
- PCI express Gen2
- Ethernet Engine
- I2C
- UART
- SPI
- PWM
Support is quite minimal for now, since it only includes timer, clock,
pictrl and serial controller drivers, so we can only boot to userspace
through initramfs. Support for the other peripherals will come eventually.
* milbeaut/newsoc:
ARM: multi_v7_defconfig: add ARCH_MILBEAUT and ARCH_MILBEAUT_M10V
ARM: configs: Add Milbeaut M10V defconfig
ARM: dts: milbeaut: Add device tree set for the Milbeaut M10V board
clocksource/drivers/timer-milbeaut: Introduce timer for Milbeaut SoCs
dt-bindings: timer: Add Milbeaut M10V timer description
ARM: milbeaut: Add basic support for Milbeaut m10v SoC
dt-bindings: Add documentation for Milbeaut SoCs
dt-bindings: arm: Add SMP enable-method for Milbeaut
dt-bindings: sram: milbeaut: Add binding for Milbeaut smp-sram
Link: https://lore.kernel.org/linux-arm-kernel/1551243056-10521-1-git-send-email-sugaya.taichi@socionext.com/
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/clocksource/Kconfig | 9 | ||||
-rw-r--r-- | drivers/clocksource/Makefile | 1 | ||||
-rw-r--r-- | drivers/clocksource/timer-milbeaut.c | 161 |
3 files changed, 171 insertions, 0 deletions
diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig index a9e26f6a81a1..9101b8fde93c 100644 --- a/drivers/clocksource/Kconfig +++ b/drivers/clocksource/Kconfig @@ -634,4 +634,13 @@ config GX6605S_TIMER help This option enables support for gx6605s SOC's timer. +config MILBEAUT_TIMER + bool "Milbeaut timer driver" if COMPILE_TEST + depends on OF + depends on ARM + select TIMER_OF + select CLKSRC_MMIO + help + Enables the support for Milbeaut timer driver. + endmenu diff --git a/drivers/clocksource/Makefile b/drivers/clocksource/Makefile index cdd210ff89ea..6f2543bd5fdb 100644 --- a/drivers/clocksource/Makefile +++ b/drivers/clocksource/Makefile @@ -55,6 +55,7 @@ obj-$(CONFIG_CLKSRC_TI_32K) += timer-ti-32k.o obj-$(CONFIG_CLKSRC_NPS) += timer-nps.o obj-$(CONFIG_OXNAS_RPS_TIMER) += timer-oxnas-rps.o obj-$(CONFIG_OWL_TIMER) += timer-owl.o +obj-$(CONFIG_MILBEAUT_TIMER) += timer-milbeaut.o obj-$(CONFIG_SPRD_TIMER) += timer-sprd.o obj-$(CONFIG_NPCM7XX_TIMER) += timer-npcm7xx.o obj-$(CONFIG_RDA_TIMER) += timer-rda.o diff --git a/drivers/clocksource/timer-milbeaut.c b/drivers/clocksource/timer-milbeaut.c new file mode 100644 index 000000000000..f2019a88e3ee --- /dev/null +++ b/drivers/clocksource/timer-milbeaut.c @@ -0,0 +1,161 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2018 Socionext Inc. + */ + +#include <linux/clk.h> +#include <linux/interrupt.h> +#include <linux/irq.h> +#include <linux/irqreturn.h> +#include <linux/sched_clock.h> +#include "timer-of.h" + +#define MLB_TMR_TMCSR_OFS 0x0 +#define MLB_TMR_TMR_OFS 0x4 +#define MLB_TMR_TMRLR1_OFS 0x8 +#define MLB_TMR_TMRLR2_OFS 0xc +#define MLB_TMR_REGSZPCH 0x10 + +#define MLB_TMR_TMCSR_OUTL BIT(5) +#define MLB_TMR_TMCSR_RELD BIT(4) +#define MLB_TMR_TMCSR_INTE BIT(3) +#define MLB_TMR_TMCSR_UF BIT(2) +#define MLB_TMR_TMCSR_CNTE BIT(1) +#define MLB_TMR_TMCSR_TRG BIT(0) + +#define MLB_TMR_TMCSR_CSL_DIV2 0 +#define MLB_TMR_DIV_CNT 2 + +#define MLB_TMR_SRC_CH (1) +#define MLB_TMR_EVT_CH (0) + +#define MLB_TMR_SRC_CH_OFS (MLB_TMR_REGSZPCH * MLB_TMR_SRC_CH) +#define MLB_TMR_EVT_CH_OFS (MLB_TMR_REGSZPCH * MLB_TMR_EVT_CH) + +#define MLB_TMR_SRC_TMCSR_OFS (MLB_TMR_SRC_CH_OFS + MLB_TMR_TMCSR_OFS) +#define MLB_TMR_SRC_TMR_OFS (MLB_TMR_SRC_CH_OFS + MLB_TMR_TMR_OFS) +#define MLB_TMR_SRC_TMRLR1_OFS (MLB_TMR_SRC_CH_OFS + MLB_TMR_TMRLR1_OFS) +#define MLB_TMR_SRC_TMRLR2_OFS (MLB_TMR_SRC_CH_OFS + MLB_TMR_TMRLR2_OFS) + +#define MLB_TMR_EVT_TMCSR_OFS (MLB_TMR_EVT_CH_OFS + MLB_TMR_TMCSR_OFS) +#define MLB_TMR_EVT_TMR_OFS (MLB_TMR_EVT_CH_OFS + MLB_TMR_TMR_OFS) +#define MLB_TMR_EVT_TMRLR1_OFS (MLB_TMR_EVT_CH_OFS + MLB_TMR_TMRLR1_OFS) +#define MLB_TMR_EVT_TMRLR2_OFS (MLB_TMR_EVT_CH_OFS + MLB_TMR_TMRLR2_OFS) + +#define MLB_TIMER_RATING 500 + +static irqreturn_t mlb_timer_interrupt(int irq, void *dev_id) +{ + struct clock_event_device *clk = dev_id; + struct timer_of *to = to_timer_of(clk); + u32 val; + + val = readl_relaxed(timer_of_base(to) + MLB_TMR_EVT_TMCSR_OFS); + val &= ~MLB_TMR_TMCSR_UF; + writel_relaxed(val, timer_of_base(to) + MLB_TMR_EVT_TMCSR_OFS); + + clk->event_handler(clk); + + return IRQ_HANDLED; +} + +static int mlb_set_state_periodic(struct clock_event_device *clk) +{ + struct timer_of *to = to_timer_of(clk); + u32 val = MLB_TMR_TMCSR_CSL_DIV2; + + writel_relaxed(val, timer_of_base(to) + MLB_TMR_EVT_TMCSR_OFS); + + writel_relaxed(to->of_clk.period, timer_of_base(to) + + MLB_TMR_EVT_TMRLR1_OFS); + val |= MLB_TMR_TMCSR_RELD | MLB_TMR_TMCSR_CNTE | + MLB_TMR_TMCSR_TRG | MLB_TMR_TMCSR_INTE; + writel_relaxed(val, timer_of_base(to) + MLB_TMR_EVT_TMCSR_OFS); + return 0; +} + +static int mlb_set_state_oneshot(struct clock_event_device *clk) +{ + struct timer_of *to = to_timer_of(clk); + u32 val = MLB_TMR_TMCSR_CSL_DIV2; + + writel_relaxed(val, timer_of_base(to) + MLB_TMR_EVT_TMCSR_OFS); + return 0; +} + +static int mlb_clkevt_next_event(unsigned long event, + struct clock_event_device *clk) +{ + struct timer_of *to = to_timer_of(clk); + + writel_relaxed(event, timer_of_base(to) + MLB_TMR_EVT_TMRLR1_OFS); + writel_relaxed(MLB_TMR_TMCSR_CSL_DIV2 | + MLB_TMR_TMCSR_CNTE | MLB_TMR_TMCSR_INTE | + MLB_TMR_TMCSR_TRG, timer_of_base(to) + + MLB_TMR_EVT_TMCSR_OFS); + return 0; +} + +static int mlb_config_clock_source(struct timer_of *to) +{ + writel_relaxed(0, timer_of_base(to) + MLB_TMR_SRC_TMCSR_OFS); + writel_relaxed(~0, timer_of_base(to) + MLB_TMR_SRC_TMR_OFS); + writel_relaxed(~0, timer_of_base(to) + MLB_TMR_SRC_TMRLR1_OFS); + writel_relaxed(~0, timer_of_base(to) + MLB_TMR_SRC_TMRLR2_OFS); + writel_relaxed(BIT(4) | BIT(1) | BIT(0), timer_of_base(to) + + MLB_TMR_SRC_TMCSR_OFS); + return 0; +} + +static int mlb_config_clock_event(struct timer_of *to) +{ + writel_relaxed(0, timer_of_base(to) + MLB_TMR_EVT_TMCSR_OFS); + return 0; +} + +static struct timer_of to = { + .flags = TIMER_OF_IRQ | TIMER_OF_BASE | TIMER_OF_CLOCK, + + .clkevt = { + .name = "mlb-clkevt", + .rating = MLB_TIMER_RATING, + .cpumask = cpu_possible_mask, + .features = CLOCK_EVT_FEAT_DYNIRQ | CLOCK_EVT_FEAT_ONESHOT, + .set_state_oneshot = mlb_set_state_oneshot, + .set_state_periodic = mlb_set_state_periodic, + .set_next_event = mlb_clkevt_next_event, + }, + + .of_irq = { + .flags = IRQF_TIMER | IRQF_IRQPOLL, + .handler = mlb_timer_interrupt, + }, +}; + +static u64 notrace mlb_timer_sched_read(void) +{ + return ~readl_relaxed(timer_of_base(&to) + MLB_TMR_SRC_TMR_OFS); +} + +static int __init mlb_timer_init(struct device_node *node) +{ + int ret; + unsigned long rate; + + ret = timer_of_init(node, &to); + if (ret) + return ret; + + rate = timer_of_rate(&to) / MLB_TMR_DIV_CNT; + mlb_config_clock_source(&to); + clocksource_mmio_init(timer_of_base(&to) + MLB_TMR_SRC_TMR_OFS, + node->name, rate, MLB_TIMER_RATING, 32, + clocksource_mmio_readl_down); + sched_clock_register(mlb_timer_sched_read, 32, rate); + mlb_config_clock_event(&to); + clockevents_config_and_register(&to.clkevt, timer_of_rate(&to), 15, + 0xffffffff); + return 0; +} +TIMER_OF_DECLARE(mlb_peritimer, "socionext,milbeaut-timer", + mlb_timer_init); |