Gregory CLEMENT | 6fe9cbd | 2012-06-13 18:58:09 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Marvell Armada 370/XP SoC timer handling. |
| 3 | * |
| 4 | * Copyright (C) 2012 Marvell |
| 5 | * |
| 6 | * Lior Amsalem <alior@marvell.com> |
| 7 | * Gregory CLEMENT <gregory.clement@free-electrons.com> |
| 8 | * Thomas Petazzoni <thomas.petazzoni@free-electrons.com> |
| 9 | * |
| 10 | * This file is licensed under the terms of the GNU General Public |
| 11 | * License version 2. This program is licensed "as is" without any |
| 12 | * warranty of any kind, whether express or implied. |
| 13 | * |
| 14 | * Timer 0 is used as free-running clocksource, while timer 1 is |
| 15 | * used as clock_event_device. |
Ezequiel Garcia | 7cd6392 | 2013-08-13 11:43:13 -0300 | [diff] [blame] | 16 | * |
| 17 | * --- |
| 18 | * Clocksource driver for Armada 370 and Armada XP SoC. |
| 19 | * This driver implements one compatible string for each SoC, given |
| 20 | * each has its own characteristics: |
| 21 | * |
| 22 | * * Armada 370 has no 25 MHz fixed timer. |
| 23 | * |
| 24 | * * Armada XP cannot work properly without such 25 MHz fixed timer as |
| 25 | * doing otherwise leads to using a clocksource whose frequency varies |
| 26 | * when doing cpufreq frequency changes. |
| 27 | * |
| 28 | * See Documentation/devicetree/bindings/timer/marvell,armada-370-xp-timer.txt |
Gregory CLEMENT | 6fe9cbd | 2012-06-13 18:58:09 +0200 | [diff] [blame] | 29 | */ |
| 30 | |
| 31 | #include <linux/init.h> |
| 32 | #include <linux/platform_device.h> |
| 33 | #include <linux/kernel.h> |
Gregory CLEMENT | 307c2bf | 2012-11-17 15:22:25 +0100 | [diff] [blame] | 34 | #include <linux/clk.h> |
Stephen Boyd | 5ddb6d2 | 2013-02-15 17:02:16 -0800 | [diff] [blame] | 35 | #include <linux/cpu.h> |
Gregory CLEMENT | 6fe9cbd | 2012-06-13 18:58:09 +0200 | [diff] [blame] | 36 | #include <linux/timer.h> |
| 37 | #include <linux/clockchips.h> |
| 38 | #include <linux/interrupt.h> |
| 39 | #include <linux/of.h> |
| 40 | #include <linux/of_irq.h> |
| 41 | #include <linux/of_address.h> |
| 42 | #include <linux/irq.h> |
| 43 | #include <linux/module.h> |
Stephen Boyd | 38ff87f | 2013-06-01 23:39:40 -0700 | [diff] [blame] | 44 | #include <linux/sched_clock.h> |
Gregory CLEMENT | ddd3f69 | 2013-01-25 18:32:42 +0100 | [diff] [blame] | 45 | #include <linux/percpu.h> |
Thomas Petazzoni | f9a49ab | 2014-11-21 17:00:01 +0100 | [diff] [blame] | 46 | #include <linux/syscore_ops.h> |
Gregory CLEMENT | 6fe9cbd | 2012-06-13 18:58:09 +0200 | [diff] [blame] | 47 | |
Russell King | cb0f253 | 2015-10-19 16:19:20 +0100 | [diff] [blame] | 48 | #include <asm/delay.h> |
| 49 | |
Gregory CLEMENT | 6fe9cbd | 2012-06-13 18:58:09 +0200 | [diff] [blame] | 50 | /* |
| 51 | * Timer block registers. |
| 52 | */ |
| 53 | #define TIMER_CTRL_OFF 0x0000 |
Ezequiel Garcia | ad48bd6 | 2013-08-13 11:43:10 -0300 | [diff] [blame] | 54 | #define TIMER0_EN BIT(0) |
| 55 | #define TIMER0_RELOAD_EN BIT(1) |
| 56 | #define TIMER0_25MHZ BIT(11) |
Gregory CLEMENT | 6fe9cbd | 2012-06-13 18:58:09 +0200 | [diff] [blame] | 57 | #define TIMER0_DIV(div) ((div) << 19) |
Ezequiel Garcia | ad48bd6 | 2013-08-13 11:43:10 -0300 | [diff] [blame] | 58 | #define TIMER1_EN BIT(2) |
| 59 | #define TIMER1_RELOAD_EN BIT(3) |
| 60 | #define TIMER1_25MHZ BIT(12) |
Gregory CLEMENT | 6fe9cbd | 2012-06-13 18:58:09 +0200 | [diff] [blame] | 61 | #define TIMER1_DIV(div) ((div) << 22) |
| 62 | #define TIMER_EVENTS_STATUS 0x0004 |
| 63 | #define TIMER0_CLR_MASK (~0x1) |
| 64 | #define TIMER1_CLR_MASK (~0x100) |
| 65 | #define TIMER0_RELOAD_OFF 0x0010 |
| 66 | #define TIMER0_VAL_OFF 0x0014 |
| 67 | #define TIMER1_RELOAD_OFF 0x0018 |
| 68 | #define TIMER1_VAL_OFF 0x001c |
| 69 | |
Gregory CLEMENT | ddd3f69 | 2013-01-25 18:32:42 +0100 | [diff] [blame] | 70 | #define LCL_TIMER_EVENTS_STATUS 0x0028 |
Gregory CLEMENT | 6fe9cbd | 2012-06-13 18:58:09 +0200 | [diff] [blame] | 71 | /* Global timers are connected to the coherency fabric clock, and the |
| 72 | below divider reduces their incrementing frequency. */ |
| 73 | #define TIMER_DIVIDER_SHIFT 5 |
| 74 | #define TIMER_DIVIDER (1 << TIMER_DIVIDER_SHIFT) |
| 75 | |
| 76 | /* |
| 77 | * SoC-specific data. |
| 78 | */ |
Gregory CLEMENT | ddd3f69 | 2013-01-25 18:32:42 +0100 | [diff] [blame] | 79 | static void __iomem *timer_base, *local_base; |
| 80 | static unsigned int timer_clk; |
| 81 | static bool timer25Mhz = true; |
Ezequiel Garcia | 08cb8e4 | 2013-12-02 11:39:56 +0100 | [diff] [blame] | 82 | static u32 enable_mask; |
Gregory CLEMENT | 6fe9cbd | 2012-06-13 18:58:09 +0200 | [diff] [blame] | 83 | |
| 84 | /* |
| 85 | * Number of timer ticks per jiffy. |
| 86 | */ |
| 87 | static u32 ticks_per_jiffy; |
| 88 | |
Stephen Boyd | 5ddb6d2 | 2013-02-15 17:02:16 -0800 | [diff] [blame] | 89 | static struct clock_event_device __percpu *armada_370_xp_evt; |
Gregory CLEMENT | ddd3f69 | 2013-01-25 18:32:42 +0100 | [diff] [blame] | 90 | |
Ezequiel Garcia | 3579698 | 2013-08-13 11:43:11 -0300 | [diff] [blame] | 91 | static void local_timer_ctrl_clrset(u32 clr, u32 set) |
| 92 | { |
| 93 | writel((readl(local_base + TIMER_CTRL_OFF) & ~clr) | set, |
| 94 | local_base + TIMER_CTRL_OFF); |
| 95 | } |
Gregory CLEMENT | 6fe9cbd | 2012-06-13 18:58:09 +0200 | [diff] [blame] | 96 | |
Stephen Boyd | d9dbcbe | 2013-07-18 16:21:27 -0700 | [diff] [blame] | 97 | static u64 notrace armada_370_xp_read_sched_clock(void) |
Gregory CLEMENT | 6fe9cbd | 2012-06-13 18:58:09 +0200 | [diff] [blame] | 98 | { |
| 99 | return ~readl(timer_base + TIMER0_VAL_OFF); |
| 100 | } |
| 101 | |
| 102 | /* |
| 103 | * Clockevent handling. |
| 104 | */ |
| 105 | static int |
| 106 | armada_370_xp_clkevt_next_event(unsigned long delta, |
| 107 | struct clock_event_device *dev) |
| 108 | { |
Gregory CLEMENT | 6fe9cbd | 2012-06-13 18:58:09 +0200 | [diff] [blame] | 109 | /* |
| 110 | * Clear clockevent timer interrupt. |
| 111 | */ |
Gregory CLEMENT | ddd3f69 | 2013-01-25 18:32:42 +0100 | [diff] [blame] | 112 | writel(TIMER0_CLR_MASK, local_base + LCL_TIMER_EVENTS_STATUS); |
Gregory CLEMENT | 6fe9cbd | 2012-06-13 18:58:09 +0200 | [diff] [blame] | 113 | |
| 114 | /* |
| 115 | * Setup new clockevent timer value. |
| 116 | */ |
Gregory CLEMENT | ddd3f69 | 2013-01-25 18:32:42 +0100 | [diff] [blame] | 117 | writel(delta, local_base + TIMER0_VAL_OFF); |
Gregory CLEMENT | 6fe9cbd | 2012-06-13 18:58:09 +0200 | [diff] [blame] | 118 | |
| 119 | /* |
| 120 | * Enable the timer. |
| 121 | */ |
Ezequiel Garcia | 08cb8e4 | 2013-12-02 11:39:56 +0100 | [diff] [blame] | 122 | local_timer_ctrl_clrset(TIMER0_RELOAD_EN, enable_mask); |
Gregory CLEMENT | 6fe9cbd | 2012-06-13 18:58:09 +0200 | [diff] [blame] | 123 | return 0; |
| 124 | } |
| 125 | |
Viresh Kumar | d96f441 | 2015-06-18 16:24:40 +0530 | [diff] [blame] | 126 | static int armada_370_xp_clkevt_shutdown(struct clock_event_device *evt) |
Gregory CLEMENT | 6fe9cbd | 2012-06-13 18:58:09 +0200 | [diff] [blame] | 127 | { |
Viresh Kumar | d96f441 | 2015-06-18 16:24:40 +0530 | [diff] [blame] | 128 | /* |
| 129 | * Disable timer. |
| 130 | */ |
| 131 | local_timer_ctrl_clrset(TIMER0_EN, 0); |
Gregory CLEMENT | ddd3f69 | 2013-01-25 18:32:42 +0100 | [diff] [blame] | 132 | |
Viresh Kumar | d96f441 | 2015-06-18 16:24:40 +0530 | [diff] [blame] | 133 | /* |
| 134 | * ACK pending timer interrupt. |
| 135 | */ |
| 136 | writel(TIMER0_CLR_MASK, local_base + LCL_TIMER_EVENTS_STATUS); |
| 137 | return 0; |
| 138 | } |
Gregory CLEMENT | 6fe9cbd | 2012-06-13 18:58:09 +0200 | [diff] [blame] | 139 | |
Viresh Kumar | d96f441 | 2015-06-18 16:24:40 +0530 | [diff] [blame] | 140 | static int armada_370_xp_clkevt_set_periodic(struct clock_event_device *evt) |
| 141 | { |
| 142 | /* |
| 143 | * Setup timer to fire at 1/HZ intervals. |
| 144 | */ |
| 145 | writel(ticks_per_jiffy - 1, local_base + TIMER0_RELOAD_OFF); |
| 146 | writel(ticks_per_jiffy - 1, local_base + TIMER0_VAL_OFF); |
Gregory CLEMENT | 6fe9cbd | 2012-06-13 18:58:09 +0200 | [diff] [blame] | 147 | |
Viresh Kumar | d96f441 | 2015-06-18 16:24:40 +0530 | [diff] [blame] | 148 | /* |
| 149 | * Enable timer. |
| 150 | */ |
| 151 | local_timer_ctrl_clrset(0, TIMER0_RELOAD_EN | enable_mask); |
| 152 | return 0; |
Gregory CLEMENT | 6fe9cbd | 2012-06-13 18:58:09 +0200 | [diff] [blame] | 153 | } |
| 154 | |
Stephen Boyd | 5ddb6d2 | 2013-02-15 17:02:16 -0800 | [diff] [blame] | 155 | static int armada_370_xp_clkevt_irq; |
Gregory CLEMENT | 6fe9cbd | 2012-06-13 18:58:09 +0200 | [diff] [blame] | 156 | |
| 157 | static irqreturn_t armada_370_xp_timer_interrupt(int irq, void *dev_id) |
| 158 | { |
| 159 | /* |
| 160 | * ACK timer interrupt and call event handler. |
| 161 | */ |
Stephen Boyd | 5ddb6d2 | 2013-02-15 17:02:16 -0800 | [diff] [blame] | 162 | struct clock_event_device *evt = dev_id; |
Gregory CLEMENT | 6fe9cbd | 2012-06-13 18:58:09 +0200 | [diff] [blame] | 163 | |
Gregory CLEMENT | ddd3f69 | 2013-01-25 18:32:42 +0100 | [diff] [blame] | 164 | writel(TIMER0_CLR_MASK, local_base + LCL_TIMER_EVENTS_STATUS); |
| 165 | evt->event_handler(evt); |
Gregory CLEMENT | 6fe9cbd | 2012-06-13 18:58:09 +0200 | [diff] [blame] | 166 | |
| 167 | return IRQ_HANDLED; |
| 168 | } |
| 169 | |
Gregory CLEMENT | ddd3f69 | 2013-01-25 18:32:42 +0100 | [diff] [blame] | 170 | /* |
| 171 | * Setup the local clock events for a CPU. |
| 172 | */ |
Paul Gortmaker | 8c37bb3 | 2013-06-19 11:32:08 -0400 | [diff] [blame] | 173 | static int armada_370_xp_timer_setup(struct clock_event_device *evt) |
Gregory CLEMENT | ddd3f69 | 2013-01-25 18:32:42 +0100 | [diff] [blame] | 174 | { |
Ezequiel Garcia | 3579698 | 2013-08-13 11:43:11 -0300 | [diff] [blame] | 175 | u32 clr = 0, set = 0; |
Gregory CLEMENT | ddd3f69 | 2013-01-25 18:32:42 +0100 | [diff] [blame] | 176 | int cpu = smp_processor_id(); |
| 177 | |
Gregory CLEMENT | ddd3f69 | 2013-01-25 18:32:42 +0100 | [diff] [blame] | 178 | if (timer25Mhz) |
Ezequiel Garcia | 3579698 | 2013-08-13 11:43:11 -0300 | [diff] [blame] | 179 | set = TIMER0_25MHZ; |
Gregory CLEMENT | ddd3f69 | 2013-01-25 18:32:42 +0100 | [diff] [blame] | 180 | else |
Ezequiel Garcia | 3579698 | 2013-08-13 11:43:11 -0300 | [diff] [blame] | 181 | clr = TIMER0_25MHZ; |
| 182 | local_timer_ctrl_clrset(clr, set); |
Gregory CLEMENT | ddd3f69 | 2013-01-25 18:32:42 +0100 | [diff] [blame] | 183 | |
Stephen Boyd | 5ddb6d2 | 2013-02-15 17:02:16 -0800 | [diff] [blame] | 184 | evt->name = "armada_370_xp_per_cpu_tick", |
| 185 | evt->features = CLOCK_EVT_FEAT_ONESHOT | |
| 186 | CLOCK_EVT_FEAT_PERIODIC; |
| 187 | evt->shift = 32, |
| 188 | evt->rating = 300, |
Gregory CLEMENT | ddd3f69 | 2013-01-25 18:32:42 +0100 | [diff] [blame] | 189 | evt->set_next_event = armada_370_xp_clkevt_next_event, |
Viresh Kumar | d96f441 | 2015-06-18 16:24:40 +0530 | [diff] [blame] | 190 | evt->set_state_shutdown = armada_370_xp_clkevt_shutdown; |
| 191 | evt->set_state_periodic = armada_370_xp_clkevt_set_periodic; |
| 192 | evt->set_state_oneshot = armada_370_xp_clkevt_shutdown; |
| 193 | evt->tick_resume = armada_370_xp_clkevt_shutdown; |
Stephen Boyd | 5ddb6d2 | 2013-02-15 17:02:16 -0800 | [diff] [blame] | 194 | evt->irq = armada_370_xp_clkevt_irq; |
Gregory CLEMENT | ddd3f69 | 2013-01-25 18:32:42 +0100 | [diff] [blame] | 195 | evt->cpumask = cpumask_of(cpu); |
| 196 | |
Gregory CLEMENT | ddd3f69 | 2013-01-25 18:32:42 +0100 | [diff] [blame] | 197 | clockevents_config_and_register(evt, timer_clk, 1, 0xfffffffe); |
| 198 | enable_percpu_irq(evt->irq, 0); |
| 199 | |
| 200 | return 0; |
| 201 | } |
| 202 | |
Olof Johansson | 47dcd35 | 2013-07-23 14:51:34 -0700 | [diff] [blame] | 203 | static void armada_370_xp_timer_stop(struct clock_event_device *evt) |
Gregory CLEMENT | ddd3f69 | 2013-01-25 18:32:42 +0100 | [diff] [blame] | 204 | { |
Viresh Kumar | d96f441 | 2015-06-18 16:24:40 +0530 | [diff] [blame] | 205 | evt->set_state_shutdown(evt); |
Gregory CLEMENT | ddd3f69 | 2013-01-25 18:32:42 +0100 | [diff] [blame] | 206 | disable_percpu_irq(evt->irq); |
| 207 | } |
| 208 | |
Olof Johansson | 47dcd35 | 2013-07-23 14:51:34 -0700 | [diff] [blame] | 209 | static int armada_370_xp_timer_cpu_notify(struct notifier_block *self, |
Stephen Boyd | 5ddb6d2 | 2013-02-15 17:02:16 -0800 | [diff] [blame] | 210 | unsigned long action, void *hcpu) |
| 211 | { |
| 212 | /* |
| 213 | * Grab cpu pointer in each case to avoid spurious |
| 214 | * preemptible warnings |
| 215 | */ |
| 216 | switch (action & ~CPU_TASKS_FROZEN) { |
| 217 | case CPU_STARTING: |
| 218 | armada_370_xp_timer_setup(this_cpu_ptr(armada_370_xp_evt)); |
| 219 | break; |
| 220 | case CPU_DYING: |
| 221 | armada_370_xp_timer_stop(this_cpu_ptr(armada_370_xp_evt)); |
| 222 | break; |
| 223 | } |
| 224 | |
| 225 | return NOTIFY_OK; |
| 226 | } |
| 227 | |
Olof Johansson | 47dcd35 | 2013-07-23 14:51:34 -0700 | [diff] [blame] | 228 | static struct notifier_block armada_370_xp_timer_cpu_nb = { |
Stephen Boyd | 5ddb6d2 | 2013-02-15 17:02:16 -0800 | [diff] [blame] | 229 | .notifier_call = armada_370_xp_timer_cpu_notify, |
Gregory CLEMENT | 6fe9cbd | 2012-06-13 18:58:09 +0200 | [diff] [blame] | 230 | }; |
| 231 | |
Thomas Petazzoni | f9a49ab | 2014-11-21 17:00:01 +0100 | [diff] [blame] | 232 | static u32 timer0_ctrl_reg, timer0_local_ctrl_reg; |
| 233 | |
| 234 | static int armada_370_xp_timer_suspend(void) |
| 235 | { |
| 236 | timer0_ctrl_reg = readl(timer_base + TIMER_CTRL_OFF); |
| 237 | timer0_local_ctrl_reg = readl(local_base + TIMER_CTRL_OFF); |
| 238 | return 0; |
| 239 | } |
| 240 | |
| 241 | static void armada_370_xp_timer_resume(void) |
| 242 | { |
| 243 | writel(0xffffffff, timer_base + TIMER0_VAL_OFF); |
| 244 | writel(0xffffffff, timer_base + TIMER0_RELOAD_OFF); |
| 245 | writel(timer0_ctrl_reg, timer_base + TIMER_CTRL_OFF); |
| 246 | writel(timer0_local_ctrl_reg, local_base + TIMER_CTRL_OFF); |
| 247 | } |
| 248 | |
Ben Dooks | 2c436e4 | 2016-06-16 15:47:49 +0200 | [diff] [blame] | 249 | static struct syscore_ops armada_370_xp_timer_syscore_ops = { |
Thomas Petazzoni | f9a49ab | 2014-11-21 17:00:01 +0100 | [diff] [blame] | 250 | .suspend = armada_370_xp_timer_suspend, |
| 251 | .resume = armada_370_xp_timer_resume, |
| 252 | }; |
| 253 | |
Russell King | cb0f253 | 2015-10-19 16:19:20 +0100 | [diff] [blame] | 254 | static unsigned long armada_370_delay_timer_read(void) |
| 255 | { |
| 256 | return ~readl(timer_base + TIMER0_VAL_OFF); |
| 257 | } |
| 258 | |
| 259 | static struct delay_timer armada_370_delay_timer = { |
| 260 | .read_current_timer = armada_370_delay_timer_read, |
| 261 | }; |
| 262 | |
Daniel Lezcano | 12549e2 | 2016-06-06 18:00:01 +0200 | [diff] [blame] | 263 | static int __init armada_370_xp_timer_common_init(struct device_node *np) |
Gregory CLEMENT | 6fe9cbd | 2012-06-13 18:58:09 +0200 | [diff] [blame] | 264 | { |
Ezequiel Garcia | 3579698 | 2013-08-13 11:43:11 -0300 | [diff] [blame] | 265 | u32 clr = 0, set = 0; |
Gregory CLEMENT | ddd3f69 | 2013-01-25 18:32:42 +0100 | [diff] [blame] | 266 | int res; |
| 267 | |
Gregory CLEMENT | 6fe9cbd | 2012-06-13 18:58:09 +0200 | [diff] [blame] | 268 | timer_base = of_iomap(np, 0); |
Daniel Lezcano | 12549e2 | 2016-06-06 18:00:01 +0200 | [diff] [blame] | 269 | if (!timer_base) { |
| 270 | pr_err("Failed to iomap"); |
| 271 | return -ENXIO; |
| 272 | } |
| 273 | |
Gregory CLEMENT | ddd3f69 | 2013-01-25 18:32:42 +0100 | [diff] [blame] | 274 | local_base = of_iomap(np, 1); |
Daniel Lezcano | 12549e2 | 2016-06-06 18:00:01 +0200 | [diff] [blame] | 275 | if (!local_base) { |
| 276 | pr_err("Failed to iomap"); |
| 277 | return -ENXIO; |
| 278 | } |
Gregory CLEMENT | 6fe9cbd | 2012-06-13 18:58:09 +0200 | [diff] [blame] | 279 | |
Ezequiel Garcia | 08cb8e4 | 2013-12-02 11:39:56 +0100 | [diff] [blame] | 280 | if (timer25Mhz) { |
Linus Torvalds | a4ae54f | 2013-09-16 16:10:26 -0400 | [diff] [blame] | 281 | set = TIMER0_25MHZ; |
Ezequiel Garcia | 08cb8e4 | 2013-12-02 11:39:56 +0100 | [diff] [blame] | 282 | enable_mask = TIMER0_EN; |
| 283 | } else { |
Ezequiel Garcia | 3579698 | 2013-08-13 11:43:11 -0300 | [diff] [blame] | 284 | clr = TIMER0_25MHZ; |
Ezequiel Garcia | 08cb8e4 | 2013-12-02 11:39:56 +0100 | [diff] [blame] | 285 | enable_mask = TIMER0_EN | TIMER0_DIV(TIMER_DIVIDER_SHIFT); |
| 286 | } |
Ezequiel Garcia | c8af34b | 2014-02-19 17:05:26 -0300 | [diff] [blame] | 287 | atomic_io_modify(timer_base + TIMER_CTRL_OFF, clr | set, set); |
Ezequiel Garcia | 3579698 | 2013-08-13 11:43:11 -0300 | [diff] [blame] | 288 | local_timer_ctrl_clrset(clr, set); |
Gregory CLEMENT | 6fe9cbd | 2012-06-13 18:58:09 +0200 | [diff] [blame] | 289 | |
Gregory CLEMENT | ddd3f69 | 2013-01-25 18:32:42 +0100 | [diff] [blame] | 290 | /* |
| 291 | * We use timer 0 as clocksource, and private(local) timer 0 |
| 292 | * for clockevents |
| 293 | */ |
Stephen Boyd | 5ddb6d2 | 2013-02-15 17:02:16 -0800 | [diff] [blame] | 294 | armada_370_xp_clkevt_irq = irq_of_parse_and_map(np, 4); |
Gregory CLEMENT | 6fe9cbd | 2012-06-13 18:58:09 +0200 | [diff] [blame] | 295 | |
| 296 | ticks_per_jiffy = (timer_clk + HZ / 2) / HZ; |
| 297 | |
| 298 | /* |
Gregory CLEMENT | 6fe9cbd | 2012-06-13 18:58:09 +0200 | [diff] [blame] | 299 | * Setup free-running clocksource timer (interrupts |
| 300 | * disabled). |
| 301 | */ |
| 302 | writel(0xffffffff, timer_base + TIMER0_VAL_OFF); |
| 303 | writel(0xffffffff, timer_base + TIMER0_RELOAD_OFF); |
| 304 | |
Ezequiel Garcia | c8af34b | 2014-02-19 17:05:26 -0300 | [diff] [blame] | 305 | atomic_io_modify(timer_base + TIMER_CTRL_OFF, |
| 306 | TIMER0_RELOAD_EN | enable_mask, |
| 307 | TIMER0_RELOAD_EN | enable_mask); |
Gregory CLEMENT | 6fe9cbd | 2012-06-13 18:58:09 +0200 | [diff] [blame] | 308 | |
Russell King | cb0f253 | 2015-10-19 16:19:20 +0100 | [diff] [blame] | 309 | armada_370_delay_timer.freq = timer_clk; |
| 310 | register_current_timer_delay(&armada_370_delay_timer); |
| 311 | |
Ezequiel Garcia | c813eff | 2013-11-26 18:20:14 -0300 | [diff] [blame] | 312 | /* |
| 313 | * Set scale and timer for sched_clock. |
| 314 | */ |
| 315 | sched_clock_register(armada_370_xp_read_sched_clock, 32, timer_clk); |
| 316 | |
Daniel Lezcano | 12549e2 | 2016-06-06 18:00:01 +0200 | [diff] [blame] | 317 | res = clocksource_mmio_init(timer_base + TIMER0_VAL_OFF, |
| 318 | "armada_370_xp_clocksource", |
| 319 | timer_clk, 300, 32, clocksource_mmio_readl_down); |
| 320 | if (res) { |
| 321 | pr_err("Failed to initialize clocksource mmio"); |
| 322 | return res; |
| 323 | } |
Gregory CLEMENT | 6fe9cbd | 2012-06-13 18:58:09 +0200 | [diff] [blame] | 324 | |
Stephen Boyd | 5ddb6d2 | 2013-02-15 17:02:16 -0800 | [diff] [blame] | 325 | register_cpu_notifier(&armada_370_xp_timer_cpu_nb); |
Gregory CLEMENT | 6fe9cbd | 2012-06-13 18:58:09 +0200 | [diff] [blame] | 326 | |
Stephen Boyd | 5ddb6d2 | 2013-02-15 17:02:16 -0800 | [diff] [blame] | 327 | armada_370_xp_evt = alloc_percpu(struct clock_event_device); |
Daniel Lezcano | 12549e2 | 2016-06-06 18:00:01 +0200 | [diff] [blame] | 328 | if (!armada_370_xp_evt) |
| 329 | return -ENOMEM; |
Gregory CLEMENT | ddd3f69 | 2013-01-25 18:32:42 +0100 | [diff] [blame] | 330 | |
| 331 | /* |
| 332 | * Setup clockevent timer (interrupt-driven). |
| 333 | */ |
Stephen Boyd | 5ddb6d2 | 2013-02-15 17:02:16 -0800 | [diff] [blame] | 334 | res = request_percpu_irq(armada_370_xp_clkevt_irq, |
Gregory CLEMENT | ddd3f69 | 2013-01-25 18:32:42 +0100 | [diff] [blame] | 335 | armada_370_xp_timer_interrupt, |
Stephen Boyd | 5ddb6d2 | 2013-02-15 17:02:16 -0800 | [diff] [blame] | 336 | "armada_370_xp_per_cpu_tick", |
| 337 | armada_370_xp_evt); |
| 338 | /* Immediately configure the timer on the boot CPU */ |
Daniel Lezcano | 12549e2 | 2016-06-06 18:00:01 +0200 | [diff] [blame] | 339 | if (res) { |
| 340 | pr_err("Failed to request percpu irq"); |
| 341 | return res; |
| 342 | } |
| 343 | |
| 344 | res = armada_370_xp_timer_setup(this_cpu_ptr(armada_370_xp_evt)); |
Anna-Maria Gleixner | 1d661bf | 2016-07-12 16:40:09 +0200 | [diff] [blame^] | 345 | if (res) { |
Daniel Lezcano | 12549e2 | 2016-06-06 18:00:01 +0200 | [diff] [blame] | 346 | pr_err("Failed to setup timer"); |
| 347 | return res; |
| 348 | } |
Thomas Petazzoni | f9a49ab | 2014-11-21 17:00:01 +0100 | [diff] [blame] | 349 | |
| 350 | register_syscore_ops(&armada_370_xp_timer_syscore_ops); |
Daniel Lezcano | 12549e2 | 2016-06-06 18:00:01 +0200 | [diff] [blame] | 351 | |
| 352 | return 0; |
Gregory CLEMENT | ddd3f69 | 2013-01-25 18:32:42 +0100 | [diff] [blame] | 353 | } |
Ezequiel Garcia | 7cd6392 | 2013-08-13 11:43:13 -0300 | [diff] [blame] | 354 | |
Daniel Lezcano | 12549e2 | 2016-06-06 18:00:01 +0200 | [diff] [blame] | 355 | static int __init armada_xp_timer_init(struct device_node *np) |
Ezequiel Garcia | 7cd6392 | 2013-08-13 11:43:13 -0300 | [diff] [blame] | 356 | { |
Ezequiel Garcia | 5e9fe6c | 2013-08-20 12:45:53 -0300 | [diff] [blame] | 357 | struct clk *clk = of_clk_get_by_name(np, "fixed"); |
Daniel Lezcano | 12549e2 | 2016-06-06 18:00:01 +0200 | [diff] [blame] | 358 | int ret; |
Ezequiel Garcia | 5e9fe6c | 2013-08-20 12:45:53 -0300 | [diff] [blame] | 359 | |
Daniel Lezcano | 12549e2 | 2016-06-06 18:00:01 +0200 | [diff] [blame] | 360 | clk = of_clk_get(np, 0); |
| 361 | if (IS_ERR(clk)) { |
| 362 | pr_err("Failed to get clock"); |
| 363 | return PTR_ERR(clk); |
| 364 | } |
| 365 | |
| 366 | ret = clk_prepare_enable(clk); |
| 367 | if (ret) |
| 368 | return ret; |
| 369 | |
Ezequiel Garcia | 5e9fe6c | 2013-08-20 12:45:53 -0300 | [diff] [blame] | 370 | timer_clk = clk_get_rate(clk); |
Ezequiel Garcia | 7cd6392 | 2013-08-13 11:43:13 -0300 | [diff] [blame] | 371 | |
Daniel Lezcano | 12549e2 | 2016-06-06 18:00:01 +0200 | [diff] [blame] | 372 | return armada_370_xp_timer_common_init(np); |
Ezequiel Garcia | 7cd6392 | 2013-08-13 11:43:13 -0300 | [diff] [blame] | 373 | } |
Daniel Lezcano | 177cf6e | 2016-06-07 00:27:44 +0200 | [diff] [blame] | 374 | CLOCKSOURCE_OF_DECLARE(armada_xp, "marvell,armada-xp-timer", |
Ezequiel Garcia | 7cd6392 | 2013-08-13 11:43:13 -0300 | [diff] [blame] | 375 | armada_xp_timer_init); |
| 376 | |
Daniel Lezcano | 12549e2 | 2016-06-06 18:00:01 +0200 | [diff] [blame] | 377 | static int __init armada_375_timer_init(struct device_node *np) |
Ezequiel Garcia | 4a22d9c | 2014-11-04 10:21:33 -0300 | [diff] [blame] | 378 | { |
| 379 | struct clk *clk; |
Daniel Lezcano | 12549e2 | 2016-06-06 18:00:01 +0200 | [diff] [blame] | 380 | int ret; |
Ezequiel Garcia | 4a22d9c | 2014-11-04 10:21:33 -0300 | [diff] [blame] | 381 | |
| 382 | clk = of_clk_get_by_name(np, "fixed"); |
| 383 | if (!IS_ERR(clk)) { |
Daniel Lezcano | 12549e2 | 2016-06-06 18:00:01 +0200 | [diff] [blame] | 384 | ret = clk_prepare_enable(clk); |
| 385 | if (ret) |
| 386 | return ret; |
Ezequiel Garcia | 4a22d9c | 2014-11-04 10:21:33 -0300 | [diff] [blame] | 387 | timer_clk = clk_get_rate(clk); |
| 388 | } else { |
| 389 | |
| 390 | /* |
| 391 | * This fallback is required in order to retain proper |
| 392 | * devicetree backwards compatibility. |
| 393 | */ |
| 394 | clk = of_clk_get(np, 0); |
| 395 | |
| 396 | /* Must have at least a clock */ |
Daniel Lezcano | 12549e2 | 2016-06-06 18:00:01 +0200 | [diff] [blame] | 397 | if (IS_ERR(clk)) { |
| 398 | pr_err("Failed to get clock"); |
| 399 | return PTR_ERR(clk); |
| 400 | } |
| 401 | |
| 402 | ret = clk_prepare_enable(clk); |
| 403 | if (ret) |
| 404 | return ret; |
| 405 | |
Ezequiel Garcia | 4a22d9c | 2014-11-04 10:21:33 -0300 | [diff] [blame] | 406 | timer_clk = clk_get_rate(clk) / TIMER_DIVIDER; |
| 407 | timer25Mhz = false; |
| 408 | } |
| 409 | |
Daniel Lezcano | 12549e2 | 2016-06-06 18:00:01 +0200 | [diff] [blame] | 410 | return armada_370_xp_timer_common_init(np); |
Ezequiel Garcia | 4a22d9c | 2014-11-04 10:21:33 -0300 | [diff] [blame] | 411 | } |
Daniel Lezcano | 177cf6e | 2016-06-07 00:27:44 +0200 | [diff] [blame] | 412 | CLOCKSOURCE_OF_DECLARE(armada_375, "marvell,armada-375-timer", |
Ezequiel Garcia | 4a22d9c | 2014-11-04 10:21:33 -0300 | [diff] [blame] | 413 | armada_375_timer_init); |
| 414 | |
Daniel Lezcano | 12549e2 | 2016-06-06 18:00:01 +0200 | [diff] [blame] | 415 | static int __init armada_370_timer_init(struct device_node *np) |
Ezequiel Garcia | 7cd6392 | 2013-08-13 11:43:13 -0300 | [diff] [blame] | 416 | { |
Daniel Lezcano | 12549e2 | 2016-06-06 18:00:01 +0200 | [diff] [blame] | 417 | struct clk *clk; |
| 418 | int ret; |
Ezequiel Garcia | 7cd6392 | 2013-08-13 11:43:13 -0300 | [diff] [blame] | 419 | |
Daniel Lezcano | 12549e2 | 2016-06-06 18:00:01 +0200 | [diff] [blame] | 420 | clk = of_clk_get(np, 0); |
| 421 | if (IS_ERR(clk)) { |
| 422 | pr_err("Failed to get clock"); |
| 423 | return PTR_ERR(clk); |
| 424 | } |
| 425 | |
| 426 | ret = clk_prepare_enable(clk); |
| 427 | if (ret) |
| 428 | return ret; |
| 429 | |
Ezequiel Garcia | 7cd6392 | 2013-08-13 11:43:13 -0300 | [diff] [blame] | 430 | timer_clk = clk_get_rate(clk) / TIMER_DIVIDER; |
| 431 | timer25Mhz = false; |
| 432 | |
Daniel Lezcano | 12549e2 | 2016-06-06 18:00:01 +0200 | [diff] [blame] | 433 | return armada_370_xp_timer_common_init(np); |
Ezequiel Garcia | 7cd6392 | 2013-08-13 11:43:13 -0300 | [diff] [blame] | 434 | } |
Daniel Lezcano | 177cf6e | 2016-06-07 00:27:44 +0200 | [diff] [blame] | 435 | CLOCKSOURCE_OF_DECLARE(armada_370, "marvell,armada-370-timer", |
Ezequiel Garcia | 7cd6392 | 2013-08-13 11:43:13 -0300 | [diff] [blame] | 436 | armada_370_timer_init); |