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> |
Gregory CLEMENT | 6fe9cbd | 2012-06-13 18:58:09 +0200 | [diff] [blame] | 46 | |
Gregory CLEMENT | 6fe9cbd | 2012-06-13 18:58:09 +0200 | [diff] [blame] | 47 | /* |
| 48 | * Timer block registers. |
| 49 | */ |
| 50 | #define TIMER_CTRL_OFF 0x0000 |
Ezequiel Garcia | ad48bd6 | 2013-08-13 11:43:10 -0300 | [diff] [blame] | 51 | #define TIMER0_EN BIT(0) |
| 52 | #define TIMER0_RELOAD_EN BIT(1) |
| 53 | #define TIMER0_25MHZ BIT(11) |
Gregory CLEMENT | 6fe9cbd | 2012-06-13 18:58:09 +0200 | [diff] [blame] | 54 | #define TIMER0_DIV(div) ((div) << 19) |
Ezequiel Garcia | ad48bd6 | 2013-08-13 11:43:10 -0300 | [diff] [blame] | 55 | #define TIMER1_EN BIT(2) |
| 56 | #define TIMER1_RELOAD_EN BIT(3) |
| 57 | #define TIMER1_25MHZ BIT(12) |
Gregory CLEMENT | 6fe9cbd | 2012-06-13 18:58:09 +0200 | [diff] [blame] | 58 | #define TIMER1_DIV(div) ((div) << 22) |
| 59 | #define TIMER_EVENTS_STATUS 0x0004 |
| 60 | #define TIMER0_CLR_MASK (~0x1) |
| 61 | #define TIMER1_CLR_MASK (~0x100) |
| 62 | #define TIMER0_RELOAD_OFF 0x0010 |
| 63 | #define TIMER0_VAL_OFF 0x0014 |
| 64 | #define TIMER1_RELOAD_OFF 0x0018 |
| 65 | #define TIMER1_VAL_OFF 0x001c |
| 66 | |
Gregory CLEMENT | ddd3f69 | 2013-01-25 18:32:42 +0100 | [diff] [blame] | 67 | #define LCL_TIMER_EVENTS_STATUS 0x0028 |
Gregory CLEMENT | 6fe9cbd | 2012-06-13 18:58:09 +0200 | [diff] [blame] | 68 | /* Global timers are connected to the coherency fabric clock, and the |
| 69 | below divider reduces their incrementing frequency. */ |
| 70 | #define TIMER_DIVIDER_SHIFT 5 |
| 71 | #define TIMER_DIVIDER (1 << TIMER_DIVIDER_SHIFT) |
| 72 | |
| 73 | /* |
| 74 | * SoC-specific data. |
| 75 | */ |
Gregory CLEMENT | ddd3f69 | 2013-01-25 18:32:42 +0100 | [diff] [blame] | 76 | static void __iomem *timer_base, *local_base; |
| 77 | static unsigned int timer_clk; |
| 78 | static bool timer25Mhz = true; |
Ezequiel Garcia | 08cb8e4 | 2013-12-02 11:39:56 +0100 | [diff] [blame] | 79 | static u32 enable_mask; |
Gregory CLEMENT | 6fe9cbd | 2012-06-13 18:58:09 +0200 | [diff] [blame] | 80 | |
| 81 | /* |
| 82 | * Number of timer ticks per jiffy. |
| 83 | */ |
| 84 | static u32 ticks_per_jiffy; |
| 85 | |
Stephen Boyd | 5ddb6d2 | 2013-02-15 17:02:16 -0800 | [diff] [blame] | 86 | static struct clock_event_device __percpu *armada_370_xp_evt; |
Gregory CLEMENT | ddd3f69 | 2013-01-25 18:32:42 +0100 | [diff] [blame] | 87 | |
Ezequiel Garcia | 3579698 | 2013-08-13 11:43:11 -0300 | [diff] [blame] | 88 | static void local_timer_ctrl_clrset(u32 clr, u32 set) |
| 89 | { |
| 90 | writel((readl(local_base + TIMER_CTRL_OFF) & ~clr) | set, |
| 91 | local_base + TIMER_CTRL_OFF); |
| 92 | } |
Gregory CLEMENT | 6fe9cbd | 2012-06-13 18:58:09 +0200 | [diff] [blame] | 93 | |
Stephen Boyd | d9dbcbe | 2013-07-18 16:21:27 -0700 | [diff] [blame] | 94 | static u64 notrace armada_370_xp_read_sched_clock(void) |
Gregory CLEMENT | 6fe9cbd | 2012-06-13 18:58:09 +0200 | [diff] [blame] | 95 | { |
| 96 | return ~readl(timer_base + TIMER0_VAL_OFF); |
| 97 | } |
| 98 | |
| 99 | /* |
| 100 | * Clockevent handling. |
| 101 | */ |
| 102 | static int |
| 103 | armada_370_xp_clkevt_next_event(unsigned long delta, |
| 104 | struct clock_event_device *dev) |
| 105 | { |
Gregory CLEMENT | 6fe9cbd | 2012-06-13 18:58:09 +0200 | [diff] [blame] | 106 | /* |
| 107 | * Clear clockevent timer interrupt. |
| 108 | */ |
Gregory CLEMENT | ddd3f69 | 2013-01-25 18:32:42 +0100 | [diff] [blame] | 109 | writel(TIMER0_CLR_MASK, local_base + LCL_TIMER_EVENTS_STATUS); |
Gregory CLEMENT | 6fe9cbd | 2012-06-13 18:58:09 +0200 | [diff] [blame] | 110 | |
| 111 | /* |
| 112 | * Setup new clockevent timer value. |
| 113 | */ |
Gregory CLEMENT | ddd3f69 | 2013-01-25 18:32:42 +0100 | [diff] [blame] | 114 | writel(delta, local_base + TIMER0_VAL_OFF); |
Gregory CLEMENT | 6fe9cbd | 2012-06-13 18:58:09 +0200 | [diff] [blame] | 115 | |
| 116 | /* |
| 117 | * Enable the timer. |
| 118 | */ |
Ezequiel Garcia | 08cb8e4 | 2013-12-02 11:39:56 +0100 | [diff] [blame] | 119 | local_timer_ctrl_clrset(TIMER0_RELOAD_EN, enable_mask); |
Gregory CLEMENT | 6fe9cbd | 2012-06-13 18:58:09 +0200 | [diff] [blame] | 120 | return 0; |
| 121 | } |
| 122 | |
| 123 | static void |
| 124 | armada_370_xp_clkevt_mode(enum clock_event_mode mode, |
| 125 | struct clock_event_device *dev) |
| 126 | { |
Gregory CLEMENT | 6fe9cbd | 2012-06-13 18:58:09 +0200 | [diff] [blame] | 127 | if (mode == CLOCK_EVT_MODE_PERIODIC) { |
Gregory CLEMENT | ddd3f69 | 2013-01-25 18:32:42 +0100 | [diff] [blame] | 128 | |
Gregory CLEMENT | 6fe9cbd | 2012-06-13 18:58:09 +0200 | [diff] [blame] | 129 | /* |
| 130 | * Setup timer to fire at 1/HZ intervals. |
| 131 | */ |
Gregory CLEMENT | ddd3f69 | 2013-01-25 18:32:42 +0100 | [diff] [blame] | 132 | writel(ticks_per_jiffy - 1, local_base + TIMER0_RELOAD_OFF); |
| 133 | writel(ticks_per_jiffy - 1, local_base + TIMER0_VAL_OFF); |
Gregory CLEMENT | 6fe9cbd | 2012-06-13 18:58:09 +0200 | [diff] [blame] | 134 | |
| 135 | /* |
| 136 | * Enable timer. |
| 137 | */ |
Ezequiel Garcia | 08cb8e4 | 2013-12-02 11:39:56 +0100 | [diff] [blame] | 138 | local_timer_ctrl_clrset(0, TIMER0_RELOAD_EN | enable_mask); |
Gregory CLEMENT | 6fe9cbd | 2012-06-13 18:58:09 +0200 | [diff] [blame] | 139 | } else { |
| 140 | /* |
| 141 | * Disable timer. |
| 142 | */ |
Ezequiel Garcia | 3579698 | 2013-08-13 11:43:11 -0300 | [diff] [blame] | 143 | local_timer_ctrl_clrset(TIMER0_EN, 0); |
Gregory CLEMENT | 6fe9cbd | 2012-06-13 18:58:09 +0200 | [diff] [blame] | 144 | |
| 145 | /* |
| 146 | * ACK pending timer interrupt. |
| 147 | */ |
Gregory CLEMENT | ddd3f69 | 2013-01-25 18:32:42 +0100 | [diff] [blame] | 148 | writel(TIMER0_CLR_MASK, local_base + LCL_TIMER_EVENTS_STATUS); |
Gregory CLEMENT | 6fe9cbd | 2012-06-13 18:58:09 +0200 | [diff] [blame] | 149 | } |
| 150 | } |
| 151 | |
Stephen Boyd | 5ddb6d2 | 2013-02-15 17:02:16 -0800 | [diff] [blame] | 152 | static int armada_370_xp_clkevt_irq; |
Gregory CLEMENT | 6fe9cbd | 2012-06-13 18:58:09 +0200 | [diff] [blame] | 153 | |
| 154 | static irqreturn_t armada_370_xp_timer_interrupt(int irq, void *dev_id) |
| 155 | { |
| 156 | /* |
| 157 | * ACK timer interrupt and call event handler. |
| 158 | */ |
Stephen Boyd | 5ddb6d2 | 2013-02-15 17:02:16 -0800 | [diff] [blame] | 159 | struct clock_event_device *evt = dev_id; |
Gregory CLEMENT | 6fe9cbd | 2012-06-13 18:58:09 +0200 | [diff] [blame] | 160 | |
Gregory CLEMENT | ddd3f69 | 2013-01-25 18:32:42 +0100 | [diff] [blame] | 161 | writel(TIMER0_CLR_MASK, local_base + LCL_TIMER_EVENTS_STATUS); |
| 162 | evt->event_handler(evt); |
Gregory CLEMENT | 6fe9cbd | 2012-06-13 18:58:09 +0200 | [diff] [blame] | 163 | |
| 164 | return IRQ_HANDLED; |
| 165 | } |
| 166 | |
Gregory CLEMENT | ddd3f69 | 2013-01-25 18:32:42 +0100 | [diff] [blame] | 167 | /* |
| 168 | * Setup the local clock events for a CPU. |
| 169 | */ |
Paul Gortmaker | 8c37bb3 | 2013-06-19 11:32:08 -0400 | [diff] [blame] | 170 | static int armada_370_xp_timer_setup(struct clock_event_device *evt) |
Gregory CLEMENT | ddd3f69 | 2013-01-25 18:32:42 +0100 | [diff] [blame] | 171 | { |
Ezequiel Garcia | 3579698 | 2013-08-13 11:43:11 -0300 | [diff] [blame] | 172 | u32 clr = 0, set = 0; |
Gregory CLEMENT | ddd3f69 | 2013-01-25 18:32:42 +0100 | [diff] [blame] | 173 | int cpu = smp_processor_id(); |
| 174 | |
Gregory CLEMENT | ddd3f69 | 2013-01-25 18:32:42 +0100 | [diff] [blame] | 175 | if (timer25Mhz) |
Ezequiel Garcia | 3579698 | 2013-08-13 11:43:11 -0300 | [diff] [blame] | 176 | set = TIMER0_25MHZ; |
Gregory CLEMENT | ddd3f69 | 2013-01-25 18:32:42 +0100 | [diff] [blame] | 177 | else |
Ezequiel Garcia | 3579698 | 2013-08-13 11:43:11 -0300 | [diff] [blame] | 178 | clr = TIMER0_25MHZ; |
| 179 | local_timer_ctrl_clrset(clr, set); |
Gregory CLEMENT | ddd3f69 | 2013-01-25 18:32:42 +0100 | [diff] [blame] | 180 | |
Stephen Boyd | 5ddb6d2 | 2013-02-15 17:02:16 -0800 | [diff] [blame] | 181 | evt->name = "armada_370_xp_per_cpu_tick", |
| 182 | evt->features = CLOCK_EVT_FEAT_ONESHOT | |
| 183 | CLOCK_EVT_FEAT_PERIODIC; |
| 184 | evt->shift = 32, |
| 185 | evt->rating = 300, |
Gregory CLEMENT | ddd3f69 | 2013-01-25 18:32:42 +0100 | [diff] [blame] | 186 | evt->set_next_event = armada_370_xp_clkevt_next_event, |
| 187 | evt->set_mode = armada_370_xp_clkevt_mode, |
Stephen Boyd | 5ddb6d2 | 2013-02-15 17:02:16 -0800 | [diff] [blame] | 188 | evt->irq = armada_370_xp_clkevt_irq; |
Gregory CLEMENT | ddd3f69 | 2013-01-25 18:32:42 +0100 | [diff] [blame] | 189 | evt->cpumask = cpumask_of(cpu); |
| 190 | |
Gregory CLEMENT | ddd3f69 | 2013-01-25 18:32:42 +0100 | [diff] [blame] | 191 | clockevents_config_and_register(evt, timer_clk, 1, 0xfffffffe); |
| 192 | enable_percpu_irq(evt->irq, 0); |
| 193 | |
| 194 | return 0; |
| 195 | } |
| 196 | |
Olof Johansson | 47dcd35 | 2013-07-23 14:51:34 -0700 | [diff] [blame] | 197 | static void armada_370_xp_timer_stop(struct clock_event_device *evt) |
Gregory CLEMENT | ddd3f69 | 2013-01-25 18:32:42 +0100 | [diff] [blame] | 198 | { |
| 199 | evt->set_mode(CLOCK_EVT_MODE_UNUSED, evt); |
| 200 | disable_percpu_irq(evt->irq); |
| 201 | } |
| 202 | |
Olof Johansson | 47dcd35 | 2013-07-23 14:51:34 -0700 | [diff] [blame] | 203 | static int armada_370_xp_timer_cpu_notify(struct notifier_block *self, |
Stephen Boyd | 5ddb6d2 | 2013-02-15 17:02:16 -0800 | [diff] [blame] | 204 | unsigned long action, void *hcpu) |
| 205 | { |
| 206 | /* |
| 207 | * Grab cpu pointer in each case to avoid spurious |
| 208 | * preemptible warnings |
| 209 | */ |
| 210 | switch (action & ~CPU_TASKS_FROZEN) { |
| 211 | case CPU_STARTING: |
| 212 | armada_370_xp_timer_setup(this_cpu_ptr(armada_370_xp_evt)); |
| 213 | break; |
| 214 | case CPU_DYING: |
| 215 | armada_370_xp_timer_stop(this_cpu_ptr(armada_370_xp_evt)); |
| 216 | break; |
| 217 | } |
| 218 | |
| 219 | return NOTIFY_OK; |
| 220 | } |
| 221 | |
Olof Johansson | 47dcd35 | 2013-07-23 14:51:34 -0700 | [diff] [blame] | 222 | static struct notifier_block armada_370_xp_timer_cpu_nb = { |
Stephen Boyd | 5ddb6d2 | 2013-02-15 17:02:16 -0800 | [diff] [blame] | 223 | .notifier_call = armada_370_xp_timer_cpu_notify, |
Gregory CLEMENT | 6fe9cbd | 2012-06-13 18:58:09 +0200 | [diff] [blame] | 224 | }; |
| 225 | |
Ezequiel Garcia | 7cd6392 | 2013-08-13 11:43:13 -0300 | [diff] [blame] | 226 | static void __init armada_370_xp_timer_common_init(struct device_node *np) |
Gregory CLEMENT | 6fe9cbd | 2012-06-13 18:58:09 +0200 | [diff] [blame] | 227 | { |
Ezequiel Garcia | 3579698 | 2013-08-13 11:43:11 -0300 | [diff] [blame] | 228 | u32 clr = 0, set = 0; |
Gregory CLEMENT | ddd3f69 | 2013-01-25 18:32:42 +0100 | [diff] [blame] | 229 | int res; |
| 230 | |
Gregory CLEMENT | 6fe9cbd | 2012-06-13 18:58:09 +0200 | [diff] [blame] | 231 | timer_base = of_iomap(np, 0); |
| 232 | WARN_ON(!timer_base); |
Gregory CLEMENT | ddd3f69 | 2013-01-25 18:32:42 +0100 | [diff] [blame] | 233 | local_base = of_iomap(np, 1); |
Gregory CLEMENT | 6fe9cbd | 2012-06-13 18:58:09 +0200 | [diff] [blame] | 234 | |
Ezequiel Garcia | 08cb8e4 | 2013-12-02 11:39:56 +0100 | [diff] [blame] | 235 | if (timer25Mhz) { |
Linus Torvalds | a4ae54f | 2013-09-16 16:10:26 -0400 | [diff] [blame] | 236 | set = TIMER0_25MHZ; |
Ezequiel Garcia | 08cb8e4 | 2013-12-02 11:39:56 +0100 | [diff] [blame] | 237 | enable_mask = TIMER0_EN; |
| 238 | } else { |
Ezequiel Garcia | 3579698 | 2013-08-13 11:43:11 -0300 | [diff] [blame] | 239 | clr = TIMER0_25MHZ; |
Ezequiel Garcia | 08cb8e4 | 2013-12-02 11:39:56 +0100 | [diff] [blame] | 240 | enable_mask = TIMER0_EN | TIMER0_DIV(TIMER_DIVIDER_SHIFT); |
| 241 | } |
Ezequiel Garcia | c8af34b | 2014-02-19 17:05:26 -0300 | [diff] [blame^] | 242 | atomic_io_modify(timer_base + TIMER_CTRL_OFF, clr | set, set); |
Ezequiel Garcia | 3579698 | 2013-08-13 11:43:11 -0300 | [diff] [blame] | 243 | local_timer_ctrl_clrset(clr, set); |
Gregory CLEMENT | 6fe9cbd | 2012-06-13 18:58:09 +0200 | [diff] [blame] | 244 | |
Gregory CLEMENT | ddd3f69 | 2013-01-25 18:32:42 +0100 | [diff] [blame] | 245 | /* |
| 246 | * We use timer 0 as clocksource, and private(local) timer 0 |
| 247 | * for clockevents |
| 248 | */ |
Stephen Boyd | 5ddb6d2 | 2013-02-15 17:02:16 -0800 | [diff] [blame] | 249 | armada_370_xp_clkevt_irq = irq_of_parse_and_map(np, 4); |
Gregory CLEMENT | 6fe9cbd | 2012-06-13 18:58:09 +0200 | [diff] [blame] | 250 | |
| 251 | ticks_per_jiffy = (timer_clk + HZ / 2) / HZ; |
| 252 | |
| 253 | /* |
Gregory CLEMENT | 6fe9cbd | 2012-06-13 18:58:09 +0200 | [diff] [blame] | 254 | * Setup free-running clocksource timer (interrupts |
| 255 | * disabled). |
| 256 | */ |
| 257 | writel(0xffffffff, timer_base + TIMER0_VAL_OFF); |
| 258 | writel(0xffffffff, timer_base + TIMER0_RELOAD_OFF); |
| 259 | |
Ezequiel Garcia | c8af34b | 2014-02-19 17:05:26 -0300 | [diff] [blame^] | 260 | atomic_io_modify(timer_base + TIMER_CTRL_OFF, |
| 261 | TIMER0_RELOAD_EN | enable_mask, |
| 262 | TIMER0_RELOAD_EN | enable_mask); |
Gregory CLEMENT | 6fe9cbd | 2012-06-13 18:58:09 +0200 | [diff] [blame] | 263 | |
Ezequiel Garcia | c813eff | 2013-11-26 18:20:14 -0300 | [diff] [blame] | 264 | /* |
| 265 | * Set scale and timer for sched_clock. |
| 266 | */ |
| 267 | sched_clock_register(armada_370_xp_read_sched_clock, 32, timer_clk); |
| 268 | |
Gregory CLEMENT | 6fe9cbd | 2012-06-13 18:58:09 +0200 | [diff] [blame] | 269 | clocksource_mmio_init(timer_base + TIMER0_VAL_OFF, |
| 270 | "armada_370_xp_clocksource", |
| 271 | timer_clk, 300, 32, clocksource_mmio_readl_down); |
| 272 | |
Stephen Boyd | 5ddb6d2 | 2013-02-15 17:02:16 -0800 | [diff] [blame] | 273 | register_cpu_notifier(&armada_370_xp_timer_cpu_nb); |
Gregory CLEMENT | 6fe9cbd | 2012-06-13 18:58:09 +0200 | [diff] [blame] | 274 | |
Stephen Boyd | 5ddb6d2 | 2013-02-15 17:02:16 -0800 | [diff] [blame] | 275 | armada_370_xp_evt = alloc_percpu(struct clock_event_device); |
Gregory CLEMENT | ddd3f69 | 2013-01-25 18:32:42 +0100 | [diff] [blame] | 276 | |
| 277 | |
| 278 | /* |
| 279 | * Setup clockevent timer (interrupt-driven). |
| 280 | */ |
Stephen Boyd | 5ddb6d2 | 2013-02-15 17:02:16 -0800 | [diff] [blame] | 281 | res = request_percpu_irq(armada_370_xp_clkevt_irq, |
Gregory CLEMENT | ddd3f69 | 2013-01-25 18:32:42 +0100 | [diff] [blame] | 282 | armada_370_xp_timer_interrupt, |
Stephen Boyd | 5ddb6d2 | 2013-02-15 17:02:16 -0800 | [diff] [blame] | 283 | "armada_370_xp_per_cpu_tick", |
| 284 | armada_370_xp_evt); |
| 285 | /* Immediately configure the timer on the boot CPU */ |
| 286 | if (!res) |
| 287 | armada_370_xp_timer_setup(this_cpu_ptr(armada_370_xp_evt)); |
Gregory CLEMENT | ddd3f69 | 2013-01-25 18:32:42 +0100 | [diff] [blame] | 288 | } |
Ezequiel Garcia | 7cd6392 | 2013-08-13 11:43:13 -0300 | [diff] [blame] | 289 | |
| 290 | static void __init armada_xp_timer_init(struct device_node *np) |
| 291 | { |
Ezequiel Garcia | 5e9fe6c | 2013-08-20 12:45:53 -0300 | [diff] [blame] | 292 | struct clk *clk = of_clk_get_by_name(np, "fixed"); |
| 293 | |
| 294 | /* The 25Mhz fixed clock is mandatory, and must always be available */ |
| 295 | BUG_ON(IS_ERR(clk)); |
| 296 | timer_clk = clk_get_rate(clk); |
Ezequiel Garcia | 7cd6392 | 2013-08-13 11:43:13 -0300 | [diff] [blame] | 297 | |
| 298 | armada_370_xp_timer_common_init(np); |
| 299 | } |
| 300 | CLOCKSOURCE_OF_DECLARE(armada_xp, "marvell,armada-xp-timer", |
| 301 | armada_xp_timer_init); |
| 302 | |
| 303 | static void __init armada_370_timer_init(struct device_node *np) |
| 304 | { |
| 305 | struct clk *clk = of_clk_get(np, 0); |
| 306 | |
Ezequiel Garcia | ec8e511 | 2013-08-20 12:45:52 -0300 | [diff] [blame] | 307 | BUG_ON(IS_ERR(clk)); |
Ezequiel Garcia | 7cd6392 | 2013-08-13 11:43:13 -0300 | [diff] [blame] | 308 | timer_clk = clk_get_rate(clk) / TIMER_DIVIDER; |
| 309 | timer25Mhz = false; |
| 310 | |
| 311 | armada_370_xp_timer_common_init(np); |
| 312 | } |
| 313 | CLOCKSOURCE_OF_DECLARE(armada_370, "marvell,armada-370-timer", |
| 314 | armada_370_timer_init); |