2 * drivers/soc/tegra/pmc.c
4 * Copyright (c) 2010 Google, Inc
7 * Colin Cross <ccross@google.com>
9 * This software is licensed under the terms of the GNU General Public
10 * License version 2, as published by the Free Software Foundation, and
11 * may be copied, distributed, and modified under those terms.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
20 #define pr_fmt(fmt) "tegra-pmc: " fmt
22 #include <linux/kernel.h>
23 #include <linux/clk.h>
24 #include <linux/clk/tegra.h>
25 #include <linux/debugfs.h>
26 #include <linux/delay.h>
27 #include <linux/err.h>
28 #include <linux/export.h>
29 #include <linux/init.h>
31 #include <linux/iopoll.h>
33 #include <linux/of_address.h>
34 #include <linux/of_platform.h>
35 #include <linux/platform_device.h>
36 #include <linux/pm_domain.h>
37 #include <linux/reboot.h>
38 #include <linux/reset.h>
39 #include <linux/seq_file.h>
40 #include <linux/slab.h>
41 #include <linux/spinlock.h>
43 #include <soc/tegra/common.h>
44 #include <soc/tegra/fuse.h>
45 #include <soc/tegra/pmc.h>
48 #define PMC_CNTRL_SYSCLK_POLARITY (1 << 10) /* sys clk polarity */
49 #define PMC_CNTRL_SYSCLK_OE (1 << 11) /* system clock enable */
50 #define PMC_CNTRL_SIDE_EFFECT_LP0 (1 << 14) /* LP0 when CPU pwr gated */
51 #define PMC_CNTRL_CPU_PWRREQ_POLARITY (1 << 15) /* CPU pwr req polarity */
52 #define PMC_CNTRL_CPU_PWRREQ_OE (1 << 16) /* CPU pwr req enable */
53 #define PMC_CNTRL_INTR_POLARITY (1 << 17) /* inverts INTR polarity */
55 #define DPD_SAMPLE 0x020
56 #define DPD_SAMPLE_ENABLE (1 << 0)
57 #define DPD_SAMPLE_DISABLE (0 << 0)
59 #define PWRGATE_TOGGLE 0x30
60 #define PWRGATE_TOGGLE_START (1 << 8)
62 #define REMOVE_CLAMPING 0x34
64 #define PWRGATE_STATUS 0x38
66 #define PMC_SCRATCH0 0x50
67 #define PMC_SCRATCH0_MODE_RECOVERY (1 << 31)
68 #define PMC_SCRATCH0_MODE_BOOTLOADER (1 << 30)
69 #define PMC_SCRATCH0_MODE_RCM (1 << 1)
70 #define PMC_SCRATCH0_MODE_MASK (PMC_SCRATCH0_MODE_RECOVERY | \
71 PMC_SCRATCH0_MODE_BOOTLOADER | \
72 PMC_SCRATCH0_MODE_RCM)
74 #define PMC_CPUPWRGOOD_TIMER 0xc8
75 #define PMC_CPUPWROFF_TIMER 0xcc
77 #define PMC_SCRATCH41 0x140
79 #define PMC_SENSOR_CTRL 0x1b0
80 #define PMC_SENSOR_CTRL_SCRATCH_WRITE (1 << 2)
81 #define PMC_SENSOR_CTRL_ENABLE_RST (1 << 1)
83 #define IO_DPD_REQ 0x1b8
84 #define IO_DPD_REQ_CODE_IDLE (0 << 30)
85 #define IO_DPD_REQ_CODE_OFF (1 << 30)
86 #define IO_DPD_REQ_CODE_ON (2 << 30)
87 #define IO_DPD_REQ_CODE_MASK (3 << 30)
89 #define IO_DPD_STATUS 0x1bc
90 #define IO_DPD2_REQ 0x1c0
91 #define IO_DPD2_STATUS 0x1c4
92 #define SEL_DPD_TIM 0x1c8
94 #define PMC_SCRATCH54 0x258
95 #define PMC_SCRATCH54_DATA_SHIFT 8
96 #define PMC_SCRATCH54_ADDR_SHIFT 0
98 #define PMC_SCRATCH55 0x25c
99 #define PMC_SCRATCH55_RESET_TEGRA (1 << 31)
100 #define PMC_SCRATCH55_CNTRL_ID_SHIFT 27
101 #define PMC_SCRATCH55_PINMUX_SHIFT 24
102 #define PMC_SCRATCH55_16BITOP (1 << 15)
103 #define PMC_SCRATCH55_CHECKSUM_SHIFT 16
104 #define PMC_SCRATCH55_I2CSLV1_SHIFT 0
106 #define GPU_RG_CNTRL 0x2d4
108 struct tegra_powergate {
109 struct generic_pm_domain genpd;
110 struct tegra_pmc *pmc;
113 unsigned int num_clks;
114 struct reset_control **resets;
115 unsigned int num_resets;
118 struct tegra_pmc_soc {
119 unsigned int num_powergates;
120 const char *const *powergates;
121 unsigned int num_cpu_powergates;
122 const u8 *cpu_powergates;
124 bool has_tsense_reset;
129 * struct tegra_pmc - NVIDIA Tegra PMC
130 * @dev: pointer to PMC device structure
131 * @base: pointer to I/O remapped register region
132 * @clk: pointer to pclk clock
133 * @soc: pointer to SoC data structure
134 * @debugfs: pointer to debugfs entry
135 * @rate: currently configured rate of pclk
136 * @suspend_mode: lowest suspend mode available
137 * @cpu_good_time: CPU power good time (in microseconds)
138 * @cpu_off_time: CPU power off time (in microsecends)
139 * @core_osc_time: core power good OSC time (in microseconds)
140 * @core_pmu_time: core power good PMU time (in microseconds)
141 * @core_off_time: core power off time (in microseconds)
142 * @corereq_high: core power request is active-high
143 * @sysclkreq_high: system clock request is active-high
144 * @combined_req: combined power request for CPU & core
145 * @cpu_pwr_good_en: CPU power good signal is enabled
146 * @lp0_vec_phys: physical base address of the LP0 warm boot code
147 * @lp0_vec_size: size of the LP0 warm boot code
148 * @powergates_available: Bitmap of available power gates
149 * @powergates_lock: mutex for power gate register access
155 struct dentry *debugfs;
157 const struct tegra_pmc_soc *soc;
161 enum tegra_suspend_mode suspend_mode;
170 bool cpu_pwr_good_en;
173 DECLARE_BITMAP(powergates_available, TEGRA_POWERGATE_MAX);
175 struct mutex powergates_lock;
178 static struct tegra_pmc *pmc = &(struct tegra_pmc) {
180 .suspend_mode = TEGRA_SUSPEND_NONE,
183 static inline struct tegra_powergate *
184 to_powergate(struct generic_pm_domain *domain)
186 return container_of(domain, struct tegra_powergate, genpd);
189 static u32 tegra_pmc_readl(unsigned long offset)
191 return readl(pmc->base + offset);
194 static void tegra_pmc_writel(u32 value, unsigned long offset)
196 writel(value, pmc->base + offset);
199 static inline bool tegra_powergate_state(int id)
201 if (id == TEGRA_POWERGATE_3D && pmc->soc->has_gpu_clamps)
202 return (tegra_pmc_readl(GPU_RG_CNTRL) & 0x1) == 0;
204 return (tegra_pmc_readl(PWRGATE_STATUS) & BIT(id)) != 0;
207 static inline bool tegra_powergate_is_valid(int id)
209 return (pmc->soc && pmc->soc->powergates[id]);
212 static inline bool tegra_powergate_is_available(int id)
214 return test_bit(id, pmc->powergates_available);
217 static int tegra_powergate_lookup(struct tegra_pmc *pmc, const char *name)
221 if (!pmc || !pmc->soc || !name)
224 for (i = 0; i < pmc->soc->num_powergates; i++) {
225 if (!tegra_powergate_is_valid(i))
228 if (!strcmp(name, pmc->soc->powergates[i]))
232 dev_err(pmc->dev, "powergate %s not found\n", name);
238 * tegra_powergate_set() - set the state of a partition
240 * @new_state: new state of the partition
242 static int tegra_powergate_set(unsigned int id, bool new_state)
247 if (id == TEGRA_POWERGATE_3D && pmc->soc->has_gpu_clamps)
250 mutex_lock(&pmc->powergates_lock);
252 if (tegra_powergate_state(id) == new_state) {
253 mutex_unlock(&pmc->powergates_lock);
257 tegra_pmc_writel(PWRGATE_TOGGLE_START | id, PWRGATE_TOGGLE);
259 err = readx_poll_timeout(tegra_powergate_state, id, status,
260 status == new_state, 10, 100000);
262 mutex_unlock(&pmc->powergates_lock);
267 static int __tegra_powergate_remove_clamping(unsigned int id)
271 mutex_lock(&pmc->powergates_lock);
274 * On Tegra124 and later, the clamps for the GPU are controlled by a
275 * separate register (with different semantics).
277 if (id == TEGRA_POWERGATE_3D) {
278 if (pmc->soc->has_gpu_clamps) {
279 tegra_pmc_writel(0, GPU_RG_CNTRL);
285 * Tegra 2 has a bug where PCIE and VDE clamping masks are
286 * swapped relatively to the partition ids
288 if (id == TEGRA_POWERGATE_VDEC)
289 mask = (1 << TEGRA_POWERGATE_PCIE);
290 else if (id == TEGRA_POWERGATE_PCIE)
291 mask = (1 << TEGRA_POWERGATE_VDEC);
295 tegra_pmc_writel(mask, REMOVE_CLAMPING);
298 mutex_unlock(&pmc->powergates_lock);
303 static void tegra_powergate_disable_clocks(struct tegra_powergate *pg)
307 for (i = 0; i < pg->num_clks; i++)
308 clk_disable_unprepare(pg->clks[i]);
311 static int tegra_powergate_enable_clocks(struct tegra_powergate *pg)
316 for (i = 0; i < pg->num_clks; i++) {
317 err = clk_prepare_enable(pg->clks[i]);
326 clk_disable_unprepare(pg->clks[i]);
331 static int tegra_powergate_reset_assert(struct tegra_powergate *pg)
336 for (i = 0; i < pg->num_resets; i++) {
337 err = reset_control_assert(pg->resets[i]);
345 static int tegra_powergate_reset_deassert(struct tegra_powergate *pg)
350 for (i = 0; i < pg->num_resets; i++) {
351 err = reset_control_deassert(pg->resets[i]);
359 static int tegra_powergate_power_up(struct tegra_powergate *pg,
364 err = tegra_powergate_reset_assert(pg);
368 usleep_range(10, 20);
370 err = tegra_powergate_set(pg->id, true);
374 usleep_range(10, 20);
376 err = tegra_powergate_enable_clocks(pg);
380 usleep_range(10, 20);
382 err = __tegra_powergate_remove_clamping(pg->id);
386 usleep_range(10, 20);
388 err = tegra_powergate_reset_deassert(pg);
392 usleep_range(10, 20);
395 tegra_powergate_disable_clocks(pg);
400 tegra_powergate_disable_clocks(pg);
401 usleep_range(10, 20);
403 tegra_powergate_set(pg->id, false);
408 static int tegra_powergate_power_down(struct tegra_powergate *pg)
412 err = tegra_powergate_enable_clocks(pg);
416 usleep_range(10, 20);
418 err = tegra_powergate_reset_assert(pg);
422 usleep_range(10, 20);
424 tegra_powergate_disable_clocks(pg);
426 usleep_range(10, 20);
428 err = tegra_powergate_set(pg->id, false);
435 tegra_powergate_enable_clocks(pg);
436 usleep_range(10, 20);
437 tegra_powergate_reset_deassert(pg);
438 usleep_range(10, 20);
440 tegra_powergate_disable_clocks(pg);
445 static int tegra_genpd_power_on(struct generic_pm_domain *domain)
447 struct tegra_powergate *pg = to_powergate(domain);
448 struct tegra_pmc *pmc = pg->pmc;
451 err = tegra_powergate_power_up(pg, true);
453 dev_err(pmc->dev, "failed to turn on PM domain %s: %d\n",
454 pg->genpd.name, err);
459 static int tegra_genpd_power_off(struct generic_pm_domain *domain)
461 struct tegra_powergate *pg = to_powergate(domain);
462 struct tegra_pmc *pmc = pg->pmc;
465 err = tegra_powergate_power_down(pg);
467 dev_err(pmc->dev, "failed to turn off PM domain %s: %d\n",
468 pg->genpd.name, err);
474 * tegra_powergate_power_on() - power on partition
477 int tegra_powergate_power_on(unsigned int id)
479 if (!tegra_powergate_is_available(id))
482 return tegra_powergate_set(id, true);
486 * tegra_powergate_power_off() - power off partition
489 int tegra_powergate_power_off(unsigned int id)
491 if (!tegra_powergate_is_available(id))
494 return tegra_powergate_set(id, false);
496 EXPORT_SYMBOL(tegra_powergate_power_off);
499 * tegra_powergate_is_powered() - check if partition is powered
502 int tegra_powergate_is_powered(unsigned int id)
506 if (!tegra_powergate_is_valid(id))
509 mutex_lock(&pmc->powergates_lock);
510 status = tegra_powergate_state(id);
511 mutex_unlock(&pmc->powergates_lock);
517 * tegra_powergate_remove_clamping() - remove power clamps for partition
520 int tegra_powergate_remove_clamping(unsigned int id)
522 if (!tegra_powergate_is_available(id))
525 return __tegra_powergate_remove_clamping(id);
527 EXPORT_SYMBOL(tegra_powergate_remove_clamping);
530 * tegra_powergate_sequence_power_up() - power up partition
532 * @clk: clock for partition
533 * @rst: reset for partition
535 * Must be called with clk disabled, and returns with clk enabled.
537 int tegra_powergate_sequence_power_up(unsigned int id, struct clk *clk,
538 struct reset_control *rst)
540 struct tegra_powergate pg;
549 err = tegra_powergate_power_up(&pg, false);
551 pr_err("failed to turn on partition %d: %d\n", id, err);
555 EXPORT_SYMBOL(tegra_powergate_sequence_power_up);
559 * tegra_get_cpu_powergate_id() - convert from CPU ID to partition ID
560 * @cpuid: CPU partition ID
562 * Returns the partition ID corresponding to the CPU partition ID or a
563 * negative error code on failure.
565 static int tegra_get_cpu_powergate_id(unsigned int cpuid)
567 if (pmc->soc && cpuid < pmc->soc->num_cpu_powergates)
568 return pmc->soc->cpu_powergates[cpuid];
574 * tegra_pmc_cpu_is_powered() - check if CPU partition is powered
575 * @cpuid: CPU partition ID
577 bool tegra_pmc_cpu_is_powered(unsigned int cpuid)
581 id = tegra_get_cpu_powergate_id(cpuid);
585 return tegra_powergate_is_powered(id);
589 * tegra_pmc_cpu_power_on() - power on CPU partition
590 * @cpuid: CPU partition ID
592 int tegra_pmc_cpu_power_on(unsigned int cpuid)
596 id = tegra_get_cpu_powergate_id(cpuid);
600 return tegra_powergate_set(id, true);
604 * tegra_pmc_cpu_remove_clamping() - remove power clamps for CPU partition
605 * @cpuid: CPU partition ID
607 int tegra_pmc_cpu_remove_clamping(unsigned int cpuid)
611 id = tegra_get_cpu_powergate_id(cpuid);
615 return tegra_powergate_remove_clamping(id);
617 #endif /* CONFIG_SMP */
619 static int tegra_pmc_restart_notify(struct notifier_block *this,
620 unsigned long action, void *data)
622 const char *cmd = data;
625 value = tegra_pmc_readl(PMC_SCRATCH0);
626 value &= ~PMC_SCRATCH0_MODE_MASK;
629 if (strcmp(cmd, "recovery") == 0)
630 value |= PMC_SCRATCH0_MODE_RECOVERY;
632 if (strcmp(cmd, "bootloader") == 0)
633 value |= PMC_SCRATCH0_MODE_BOOTLOADER;
635 if (strcmp(cmd, "forced-recovery") == 0)
636 value |= PMC_SCRATCH0_MODE_RCM;
639 tegra_pmc_writel(value, PMC_SCRATCH0);
641 value = tegra_pmc_readl(0);
643 tegra_pmc_writel(value, 0);
648 static struct notifier_block tegra_pmc_restart_handler = {
649 .notifier_call = tegra_pmc_restart_notify,
653 static int powergate_show(struct seq_file *s, void *data)
658 seq_printf(s, " powergate powered\n");
659 seq_printf(s, "------------------\n");
661 for (i = 0; i < pmc->soc->num_powergates; i++) {
662 status = tegra_powergate_is_powered(i);
666 seq_printf(s, " %9s %7s\n", pmc->soc->powergates[i],
667 status ? "yes" : "no");
673 static int powergate_open(struct inode *inode, struct file *file)
675 return single_open(file, powergate_show, inode->i_private);
678 static const struct file_operations powergate_fops = {
679 .open = powergate_open,
682 .release = single_release,
685 static int tegra_powergate_debugfs_init(void)
687 pmc->debugfs = debugfs_create_file("powergate", S_IRUGO, NULL, NULL,
695 static int tegra_powergate_of_get_clks(struct tegra_powergate *pg,
696 struct device_node *np)
699 unsigned int i, count;
702 count = of_count_phandle_with_args(np, "clocks", "#clock-cells");
706 pg->clks = kcalloc(count, sizeof(clk), GFP_KERNEL);
710 for (i = 0; i < count; i++) {
711 pg->clks[i] = of_clk_get(np, i);
712 if (IS_ERR(pg->clks[i])) {
713 err = PTR_ERR(pg->clks[i]);
718 pg->num_clks = count;
724 clk_put(pg->clks[i]);
730 static int tegra_powergate_of_get_resets(struct tegra_powergate *pg,
731 struct device_node *np)
733 struct reset_control *rst;
734 unsigned int i, count;
737 count = of_count_phandle_with_args(np, "resets", "#reset-cells");
741 pg->resets = kcalloc(count, sizeof(rst), GFP_KERNEL);
745 for (i = 0; i < count; i++) {
746 pg->resets[i] = of_reset_control_get_by_index(np, i);
747 if (IS_ERR(pg->resets[i])) {
748 err = PTR_ERR(pg->resets[i]);
753 pg->num_resets = count;
759 reset_control_put(pg->resets[i]);
765 static void tegra_powergate_add(struct tegra_pmc *pmc, struct device_node *np)
767 struct tegra_powergate *pg;
771 pg = kzalloc(sizeof(*pg), GFP_KERNEL);
775 id = tegra_powergate_lookup(pmc, np->name);
780 * Clear the bit for this powergate so it cannot be managed
781 * directly via the legacy APIs for controlling powergates.
783 clear_bit(id, pmc->powergates_available);
786 pg->genpd.name = np->name;
787 pg->genpd.power_off = tegra_genpd_power_off;
788 pg->genpd.power_on = tegra_genpd_power_on;
791 if (tegra_powergate_of_get_clks(pg, np))
794 if (tegra_powergate_of_get_resets(pg, np))
797 off = !tegra_powergate_is_powered(pg->id);
799 pm_genpd_init(&pg->genpd, NULL, off);
801 if (of_genpd_add_provider_simple(np, &pg->genpd))
804 dev_dbg(pmc->dev, "added power domain %s\n", pg->genpd.name);
809 while (pg->num_resets--)
810 reset_control_put(pg->resets[pg->num_resets]);
814 while (pg->num_clks--)
815 clk_put(pg->clks[pg->num_clks]);
819 set_bit(id, pmc->powergates_available);
825 dev_err(pmc->dev, "failed to create power domain for %s\n", np->name);
828 static void tegra_powergate_init(struct tegra_pmc *pmc)
830 struct device_node *np, *child;
832 np = of_get_child_by_name(pmc->dev->of_node, "powergates");
836 for_each_child_of_node(np, child) {
837 tegra_powergate_add(pmc, child);
844 static int tegra_io_rail_prepare(unsigned int id, unsigned long *request,
845 unsigned long *status, unsigned int *bit)
847 unsigned long rate, value;
852 * There are two sets of 30 bits to select IO rails, but bits 30 and
853 * 31 are control bits rather than IO rail selection bits.
855 if (id > 63 || *bit == 30 || *bit == 31)
859 *status = IO_DPD_STATUS;
860 *request = IO_DPD_REQ;
862 *status = IO_DPD2_STATUS;
863 *request = IO_DPD2_REQ;
866 rate = clk_get_rate(pmc->clk);
868 tegra_pmc_writel(DPD_SAMPLE_ENABLE, DPD_SAMPLE);
870 /* must be at least 200 ns, in APB (PCLK) clock cycles */
871 value = DIV_ROUND_UP(1000000000, rate);
872 value = DIV_ROUND_UP(200, value);
873 tegra_pmc_writel(value, SEL_DPD_TIM);
878 static int tegra_io_rail_poll(unsigned long offset, unsigned long mask,
879 unsigned long val, unsigned long timeout)
883 timeout = jiffies + msecs_to_jiffies(timeout);
885 while (time_after(timeout, jiffies)) {
886 value = tegra_pmc_readl(offset);
887 if ((value & mask) == val)
890 usleep_range(250, 1000);
896 static void tegra_io_rail_unprepare(void)
898 tegra_pmc_writel(DPD_SAMPLE_DISABLE, DPD_SAMPLE);
901 int tegra_io_rail_power_on(unsigned int id)
903 unsigned long request, status, value;
904 unsigned int bit, mask;
907 mutex_lock(&pmc->powergates_lock);
909 err = tegra_io_rail_prepare(id, &request, &status, &bit);
915 value = tegra_pmc_readl(request);
917 value &= ~IO_DPD_REQ_CODE_MASK;
918 value |= IO_DPD_REQ_CODE_OFF;
919 tegra_pmc_writel(value, request);
921 err = tegra_io_rail_poll(status, mask, 0, 250);
923 pr_info("tegra_io_rail_poll() failed: %d\n", err);
927 tegra_io_rail_unprepare();
930 mutex_unlock(&pmc->powergates_lock);
934 EXPORT_SYMBOL(tegra_io_rail_power_on);
936 int tegra_io_rail_power_off(unsigned int id)
938 unsigned long request, status, value;
939 unsigned int bit, mask;
942 mutex_lock(&pmc->powergates_lock);
944 err = tegra_io_rail_prepare(id, &request, &status, &bit);
946 pr_info("tegra_io_rail_prepare() failed: %d\n", err);
952 value = tegra_pmc_readl(request);
954 value &= ~IO_DPD_REQ_CODE_MASK;
955 value |= IO_DPD_REQ_CODE_ON;
956 tegra_pmc_writel(value, request);
958 err = tegra_io_rail_poll(status, mask, mask, 250);
962 tegra_io_rail_unprepare();
965 mutex_unlock(&pmc->powergates_lock);
969 EXPORT_SYMBOL(tegra_io_rail_power_off);
971 #ifdef CONFIG_PM_SLEEP
972 enum tegra_suspend_mode tegra_pmc_get_suspend_mode(void)
974 return pmc->suspend_mode;
977 void tegra_pmc_set_suspend_mode(enum tegra_suspend_mode mode)
979 if (mode < TEGRA_SUSPEND_NONE || mode >= TEGRA_MAX_SUSPEND_MODE)
982 pmc->suspend_mode = mode;
985 void tegra_pmc_enter_suspend_mode(enum tegra_suspend_mode mode)
987 unsigned long long rate = 0;
991 case TEGRA_SUSPEND_LP1:
995 case TEGRA_SUSPEND_LP2:
996 rate = clk_get_rate(pmc->clk);
1003 if (WARN_ON_ONCE(rate == 0))
1006 if (rate != pmc->rate) {
1009 ticks = pmc->cpu_good_time * rate + USEC_PER_SEC - 1;
1010 do_div(ticks, USEC_PER_SEC);
1011 tegra_pmc_writel(ticks, PMC_CPUPWRGOOD_TIMER);
1013 ticks = pmc->cpu_off_time * rate + USEC_PER_SEC - 1;
1014 do_div(ticks, USEC_PER_SEC);
1015 tegra_pmc_writel(ticks, PMC_CPUPWROFF_TIMER);
1022 value = tegra_pmc_readl(PMC_CNTRL);
1023 value &= ~PMC_CNTRL_SIDE_EFFECT_LP0;
1024 value |= PMC_CNTRL_CPU_PWRREQ_OE;
1025 tegra_pmc_writel(value, PMC_CNTRL);
1029 static int tegra_pmc_parse_dt(struct tegra_pmc *pmc, struct device_node *np)
1031 u32 value, values[2];
1033 if (of_property_read_u32(np, "nvidia,suspend-mode", &value)) {
1037 pmc->suspend_mode = TEGRA_SUSPEND_LP0;
1041 pmc->suspend_mode = TEGRA_SUSPEND_LP1;
1045 pmc->suspend_mode = TEGRA_SUSPEND_LP2;
1049 pmc->suspend_mode = TEGRA_SUSPEND_NONE;
1054 pmc->suspend_mode = tegra_pm_validate_suspend_mode(pmc->suspend_mode);
1056 if (of_property_read_u32(np, "nvidia,cpu-pwr-good-time", &value))
1057 pmc->suspend_mode = TEGRA_SUSPEND_NONE;
1059 pmc->cpu_good_time = value;
1061 if (of_property_read_u32(np, "nvidia,cpu-pwr-off-time", &value))
1062 pmc->suspend_mode = TEGRA_SUSPEND_NONE;
1064 pmc->cpu_off_time = value;
1066 if (of_property_read_u32_array(np, "nvidia,core-pwr-good-time",
1067 values, ARRAY_SIZE(values)))
1068 pmc->suspend_mode = TEGRA_SUSPEND_NONE;
1070 pmc->core_osc_time = values[0];
1071 pmc->core_pmu_time = values[1];
1073 if (of_property_read_u32(np, "nvidia,core-pwr-off-time", &value))
1074 pmc->suspend_mode = TEGRA_SUSPEND_NONE;
1076 pmc->core_off_time = value;
1078 pmc->corereq_high = of_property_read_bool(np,
1079 "nvidia,core-power-req-active-high");
1081 pmc->sysclkreq_high = of_property_read_bool(np,
1082 "nvidia,sys-clock-req-active-high");
1084 pmc->combined_req = of_property_read_bool(np,
1085 "nvidia,combined-power-req");
1087 pmc->cpu_pwr_good_en = of_property_read_bool(np,
1088 "nvidia,cpu-pwr-good-en");
1090 if (of_property_read_u32_array(np, "nvidia,lp0-vec", values,
1091 ARRAY_SIZE(values)))
1092 if (pmc->suspend_mode == TEGRA_SUSPEND_LP0)
1093 pmc->suspend_mode = TEGRA_SUSPEND_LP1;
1095 pmc->lp0_vec_phys = values[0];
1096 pmc->lp0_vec_size = values[1];
1101 static void tegra_pmc_init(struct tegra_pmc *pmc)
1105 /* Always enable CPU power request */
1106 value = tegra_pmc_readl(PMC_CNTRL);
1107 value |= PMC_CNTRL_CPU_PWRREQ_OE;
1108 tegra_pmc_writel(value, PMC_CNTRL);
1110 value = tegra_pmc_readl(PMC_CNTRL);
1112 if (pmc->sysclkreq_high)
1113 value &= ~PMC_CNTRL_SYSCLK_POLARITY;
1115 value |= PMC_CNTRL_SYSCLK_POLARITY;
1117 /* configure the output polarity while the request is tristated */
1118 tegra_pmc_writel(value, PMC_CNTRL);
1120 /* now enable the request */
1121 value = tegra_pmc_readl(PMC_CNTRL);
1122 value |= PMC_CNTRL_SYSCLK_OE;
1123 tegra_pmc_writel(value, PMC_CNTRL);
1126 static void tegra_pmc_init_tsense_reset(struct tegra_pmc *pmc)
1128 static const char disabled[] = "emergency thermal reset disabled";
1129 u32 pmu_addr, ctrl_id, reg_addr, reg_data, pinmux;
1130 struct device *dev = pmc->dev;
1131 struct device_node *np;
1132 u32 value, checksum;
1134 if (!pmc->soc->has_tsense_reset)
1137 np = of_find_node_by_name(pmc->dev->of_node, "i2c-thermtrip");
1139 dev_warn(dev, "i2c-thermtrip node not found, %s.\n", disabled);
1143 if (of_property_read_u32(np, "nvidia,i2c-controller-id", &ctrl_id)) {
1144 dev_err(dev, "I2C controller ID missing, %s.\n", disabled);
1148 if (of_property_read_u32(np, "nvidia,bus-addr", &pmu_addr)) {
1149 dev_err(dev, "nvidia,bus-addr missing, %s.\n", disabled);
1153 if (of_property_read_u32(np, "nvidia,reg-addr", ®_addr)) {
1154 dev_err(dev, "nvidia,reg-addr missing, %s.\n", disabled);
1158 if (of_property_read_u32(np, "nvidia,reg-data", ®_data)) {
1159 dev_err(dev, "nvidia,reg-data missing, %s.\n", disabled);
1163 if (of_property_read_u32(np, "nvidia,pinmux-id", &pinmux))
1166 value = tegra_pmc_readl(PMC_SENSOR_CTRL);
1167 value |= PMC_SENSOR_CTRL_SCRATCH_WRITE;
1168 tegra_pmc_writel(value, PMC_SENSOR_CTRL);
1170 value = (reg_data << PMC_SCRATCH54_DATA_SHIFT) |
1171 (reg_addr << PMC_SCRATCH54_ADDR_SHIFT);
1172 tegra_pmc_writel(value, PMC_SCRATCH54);
1174 value = PMC_SCRATCH55_RESET_TEGRA;
1175 value |= ctrl_id << PMC_SCRATCH55_CNTRL_ID_SHIFT;
1176 value |= pinmux << PMC_SCRATCH55_PINMUX_SHIFT;
1177 value |= pmu_addr << PMC_SCRATCH55_I2CSLV1_SHIFT;
1180 * Calculate checksum of SCRATCH54, SCRATCH55 fields. Bits 23:16 will
1181 * contain the checksum and are currently zero, so they are not added.
1183 checksum = reg_addr + reg_data + (value & 0xff) + ((value >> 8) & 0xff)
1184 + ((value >> 24) & 0xff);
1186 checksum = 0x100 - checksum;
1188 value |= checksum << PMC_SCRATCH55_CHECKSUM_SHIFT;
1190 tegra_pmc_writel(value, PMC_SCRATCH55);
1192 value = tegra_pmc_readl(PMC_SENSOR_CTRL);
1193 value |= PMC_SENSOR_CTRL_ENABLE_RST;
1194 tegra_pmc_writel(value, PMC_SENSOR_CTRL);
1196 dev_info(pmc->dev, "emergency thermal reset enabled\n");
1202 static int tegra_pmc_probe(struct platform_device *pdev)
1205 struct resource *res;
1208 err = tegra_pmc_parse_dt(pmc, pdev->dev.of_node);
1212 /* take over the memory region from the early initialization */
1213 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1214 base = devm_ioremap_resource(&pdev->dev, res);
1216 return PTR_ERR(base);
1218 pmc->clk = devm_clk_get(&pdev->dev, "pclk");
1219 if (IS_ERR(pmc->clk)) {
1220 err = PTR_ERR(pmc->clk);
1221 dev_err(&pdev->dev, "failed to get pclk: %d\n", err);
1225 pmc->dev = &pdev->dev;
1227 tegra_pmc_init(pmc);
1229 tegra_pmc_init_tsense_reset(pmc);
1231 if (IS_ENABLED(CONFIG_DEBUG_FS)) {
1232 err = tegra_powergate_debugfs_init();
1237 err = register_restart_handler(&tegra_pmc_restart_handler);
1239 debugfs_remove(pmc->debugfs);
1240 dev_err(&pdev->dev, "unable to register restart handler, %d\n",
1245 tegra_powergate_init(pmc);
1247 mutex_lock(&pmc->powergates_lock);
1250 mutex_unlock(&pmc->powergates_lock);
1255 #if defined(CONFIG_PM_SLEEP) && defined(CONFIG_ARM)
1256 static int tegra_pmc_suspend(struct device *dev)
1258 tegra_pmc_writel(virt_to_phys(tegra_resume), PMC_SCRATCH41);
1263 static int tegra_pmc_resume(struct device *dev)
1265 tegra_pmc_writel(0x0, PMC_SCRATCH41);
1270 static SIMPLE_DEV_PM_OPS(tegra_pmc_pm_ops, tegra_pmc_suspend, tegra_pmc_resume);
1274 static const char * const tegra20_powergates[] = {
1275 [TEGRA_POWERGATE_CPU] = "cpu",
1276 [TEGRA_POWERGATE_3D] = "3d",
1277 [TEGRA_POWERGATE_VENC] = "venc",
1278 [TEGRA_POWERGATE_VDEC] = "vdec",
1279 [TEGRA_POWERGATE_PCIE] = "pcie",
1280 [TEGRA_POWERGATE_L2] = "l2",
1281 [TEGRA_POWERGATE_MPE] = "mpe",
1284 static const struct tegra_pmc_soc tegra20_pmc_soc = {
1285 .num_powergates = ARRAY_SIZE(tegra20_powergates),
1286 .powergates = tegra20_powergates,
1287 .num_cpu_powergates = 0,
1288 .cpu_powergates = NULL,
1289 .has_tsense_reset = false,
1290 .has_gpu_clamps = false,
1293 static const char * const tegra30_powergates[] = {
1294 [TEGRA_POWERGATE_CPU] = "cpu0",
1295 [TEGRA_POWERGATE_3D] = "3d0",
1296 [TEGRA_POWERGATE_VENC] = "venc",
1297 [TEGRA_POWERGATE_VDEC] = "vdec",
1298 [TEGRA_POWERGATE_PCIE] = "pcie",
1299 [TEGRA_POWERGATE_L2] = "l2",
1300 [TEGRA_POWERGATE_MPE] = "mpe",
1301 [TEGRA_POWERGATE_HEG] = "heg",
1302 [TEGRA_POWERGATE_SATA] = "sata",
1303 [TEGRA_POWERGATE_CPU1] = "cpu1",
1304 [TEGRA_POWERGATE_CPU2] = "cpu2",
1305 [TEGRA_POWERGATE_CPU3] = "cpu3",
1306 [TEGRA_POWERGATE_CELP] = "celp",
1307 [TEGRA_POWERGATE_3D1] = "3d1",
1310 static const u8 tegra30_cpu_powergates[] = {
1311 TEGRA_POWERGATE_CPU,
1312 TEGRA_POWERGATE_CPU1,
1313 TEGRA_POWERGATE_CPU2,
1314 TEGRA_POWERGATE_CPU3,
1317 static const struct tegra_pmc_soc tegra30_pmc_soc = {
1318 .num_powergates = ARRAY_SIZE(tegra30_powergates),
1319 .powergates = tegra30_powergates,
1320 .num_cpu_powergates = ARRAY_SIZE(tegra30_cpu_powergates),
1321 .cpu_powergates = tegra30_cpu_powergates,
1322 .has_tsense_reset = true,
1323 .has_gpu_clamps = false,
1326 static const char * const tegra114_powergates[] = {
1327 [TEGRA_POWERGATE_CPU] = "crail",
1328 [TEGRA_POWERGATE_3D] = "3d",
1329 [TEGRA_POWERGATE_VENC] = "venc",
1330 [TEGRA_POWERGATE_VDEC] = "vdec",
1331 [TEGRA_POWERGATE_MPE] = "mpe",
1332 [TEGRA_POWERGATE_HEG] = "heg",
1333 [TEGRA_POWERGATE_CPU1] = "cpu1",
1334 [TEGRA_POWERGATE_CPU2] = "cpu2",
1335 [TEGRA_POWERGATE_CPU3] = "cpu3",
1336 [TEGRA_POWERGATE_CELP] = "celp",
1337 [TEGRA_POWERGATE_CPU0] = "cpu0",
1338 [TEGRA_POWERGATE_C0NC] = "c0nc",
1339 [TEGRA_POWERGATE_C1NC] = "c1nc",
1340 [TEGRA_POWERGATE_DIS] = "dis",
1341 [TEGRA_POWERGATE_DISB] = "disb",
1342 [TEGRA_POWERGATE_XUSBA] = "xusba",
1343 [TEGRA_POWERGATE_XUSBB] = "xusbb",
1344 [TEGRA_POWERGATE_XUSBC] = "xusbc",
1347 static const u8 tegra114_cpu_powergates[] = {
1348 TEGRA_POWERGATE_CPU0,
1349 TEGRA_POWERGATE_CPU1,
1350 TEGRA_POWERGATE_CPU2,
1351 TEGRA_POWERGATE_CPU3,
1354 static const struct tegra_pmc_soc tegra114_pmc_soc = {
1355 .num_powergates = ARRAY_SIZE(tegra114_powergates),
1356 .powergates = tegra114_powergates,
1357 .num_cpu_powergates = ARRAY_SIZE(tegra114_cpu_powergates),
1358 .cpu_powergates = tegra114_cpu_powergates,
1359 .has_tsense_reset = true,
1360 .has_gpu_clamps = false,
1363 static const char * const tegra124_powergates[] = {
1364 [TEGRA_POWERGATE_CPU] = "crail",
1365 [TEGRA_POWERGATE_3D] = "3d",
1366 [TEGRA_POWERGATE_VENC] = "venc",
1367 [TEGRA_POWERGATE_PCIE] = "pcie",
1368 [TEGRA_POWERGATE_VDEC] = "vdec",
1369 [TEGRA_POWERGATE_MPE] = "mpe",
1370 [TEGRA_POWERGATE_HEG] = "heg",
1371 [TEGRA_POWERGATE_SATA] = "sata",
1372 [TEGRA_POWERGATE_CPU1] = "cpu1",
1373 [TEGRA_POWERGATE_CPU2] = "cpu2",
1374 [TEGRA_POWERGATE_CPU3] = "cpu3",
1375 [TEGRA_POWERGATE_CELP] = "celp",
1376 [TEGRA_POWERGATE_CPU0] = "cpu0",
1377 [TEGRA_POWERGATE_C0NC] = "c0nc",
1378 [TEGRA_POWERGATE_C1NC] = "c1nc",
1379 [TEGRA_POWERGATE_SOR] = "sor",
1380 [TEGRA_POWERGATE_DIS] = "dis",
1381 [TEGRA_POWERGATE_DISB] = "disb",
1382 [TEGRA_POWERGATE_XUSBA] = "xusba",
1383 [TEGRA_POWERGATE_XUSBB] = "xusbb",
1384 [TEGRA_POWERGATE_XUSBC] = "xusbc",
1385 [TEGRA_POWERGATE_VIC] = "vic",
1386 [TEGRA_POWERGATE_IRAM] = "iram",
1389 static const u8 tegra124_cpu_powergates[] = {
1390 TEGRA_POWERGATE_CPU0,
1391 TEGRA_POWERGATE_CPU1,
1392 TEGRA_POWERGATE_CPU2,
1393 TEGRA_POWERGATE_CPU3,
1396 static const struct tegra_pmc_soc tegra124_pmc_soc = {
1397 .num_powergates = ARRAY_SIZE(tegra124_powergates),
1398 .powergates = tegra124_powergates,
1399 .num_cpu_powergates = ARRAY_SIZE(tegra124_cpu_powergates),
1400 .cpu_powergates = tegra124_cpu_powergates,
1401 .has_tsense_reset = true,
1402 .has_gpu_clamps = true,
1405 static const char * const tegra210_powergates[] = {
1406 [TEGRA_POWERGATE_CPU] = "crail",
1407 [TEGRA_POWERGATE_3D] = "3d",
1408 [TEGRA_POWERGATE_VENC] = "venc",
1409 [TEGRA_POWERGATE_PCIE] = "pcie",
1410 [TEGRA_POWERGATE_MPE] = "mpe",
1411 [TEGRA_POWERGATE_SATA] = "sata",
1412 [TEGRA_POWERGATE_CPU1] = "cpu1",
1413 [TEGRA_POWERGATE_CPU2] = "cpu2",
1414 [TEGRA_POWERGATE_CPU3] = "cpu3",
1415 [TEGRA_POWERGATE_CPU0] = "cpu0",
1416 [TEGRA_POWERGATE_C0NC] = "c0nc",
1417 [TEGRA_POWERGATE_SOR] = "sor",
1418 [TEGRA_POWERGATE_DIS] = "dis",
1419 [TEGRA_POWERGATE_DISB] = "disb",
1420 [TEGRA_POWERGATE_XUSBA] = "xusba",
1421 [TEGRA_POWERGATE_XUSBB] = "xusbb",
1422 [TEGRA_POWERGATE_XUSBC] = "xusbc",
1423 [TEGRA_POWERGATE_VIC] = "vic",
1424 [TEGRA_POWERGATE_IRAM] = "iram",
1425 [TEGRA_POWERGATE_NVDEC] = "nvdec",
1426 [TEGRA_POWERGATE_NVJPG] = "nvjpg",
1427 [TEGRA_POWERGATE_AUD] = "aud",
1428 [TEGRA_POWERGATE_DFD] = "dfd",
1429 [TEGRA_POWERGATE_VE2] = "ve2",
1432 static const u8 tegra210_cpu_powergates[] = {
1433 TEGRA_POWERGATE_CPU0,
1434 TEGRA_POWERGATE_CPU1,
1435 TEGRA_POWERGATE_CPU2,
1436 TEGRA_POWERGATE_CPU3,
1439 static const struct tegra_pmc_soc tegra210_pmc_soc = {
1440 .num_powergates = ARRAY_SIZE(tegra210_powergates),
1441 .powergates = tegra210_powergates,
1442 .num_cpu_powergates = ARRAY_SIZE(tegra210_cpu_powergates),
1443 .cpu_powergates = tegra210_cpu_powergates,
1444 .has_tsense_reset = true,
1445 .has_gpu_clamps = true,
1448 static const struct of_device_id tegra_pmc_match[] = {
1449 { .compatible = "nvidia,tegra210-pmc", .data = &tegra210_pmc_soc },
1450 { .compatible = "nvidia,tegra132-pmc", .data = &tegra124_pmc_soc },
1451 { .compatible = "nvidia,tegra124-pmc", .data = &tegra124_pmc_soc },
1452 { .compatible = "nvidia,tegra114-pmc", .data = &tegra114_pmc_soc },
1453 { .compatible = "nvidia,tegra30-pmc", .data = &tegra30_pmc_soc },
1454 { .compatible = "nvidia,tegra20-pmc", .data = &tegra20_pmc_soc },
1458 static struct platform_driver tegra_pmc_driver = {
1460 .name = "tegra-pmc",
1461 .suppress_bind_attrs = true,
1462 .of_match_table = tegra_pmc_match,
1463 #if defined(CONFIG_PM_SLEEP) && defined(CONFIG_ARM)
1464 .pm = &tegra_pmc_pm_ops,
1467 .probe = tegra_pmc_probe,
1469 builtin_platform_driver(tegra_pmc_driver);
1472 * Early initialization to allow access to registers in the very early boot
1475 static int __init tegra_pmc_early_init(void)
1477 const struct of_device_id *match;
1478 struct device_node *np;
1479 struct resource regs;
1484 np = of_find_matching_node_and_match(NULL, tegra_pmc_match, &match);
1487 * Fall back to legacy initialization for 32-bit ARM only. All
1488 * 64-bit ARM device tree files for Tegra are required to have
1491 * This is for backwards-compatibility with old device trees
1492 * that didn't contain a PMC node. Note that in this case the
1493 * SoC data can't be matched and therefore powergating is
1496 if (IS_ENABLED(CONFIG_ARM) && soc_is_tegra()) {
1497 pr_warn("DT node not found, powergating disabled\n");
1499 regs.start = 0x7000e400;
1500 regs.end = 0x7000e7ff;
1501 regs.flags = IORESOURCE_MEM;
1503 pr_warn("Using memory region %pR\n", ®s);
1506 * At this point we're not running on Tegra, so play
1507 * nice with multi-platform kernels.
1513 * Extract information from the device tree if we've found a
1516 if (of_address_to_resource(np, 0, ®s) < 0) {
1517 pr_err("failed to get PMC registers\n");
1521 pmc->soc = match->data;
1524 pmc->base = ioremap_nocache(regs.start, resource_size(®s));
1526 pr_err("failed to map PMC registers\n");
1530 /* Create a bit-map of the available and valid partitions */
1531 for (i = 0; i < pmc->soc->num_powergates; i++)
1532 if (pmc->soc->powergates[i])
1533 set_bit(i, pmc->powergates_available);
1535 mutex_init(&pmc->powergates_lock);
1538 * Invert the interrupt polarity if a PMC device tree node exists and
1539 * contains the nvidia,invert-interrupt property.
1541 invert = of_property_read_bool(np, "nvidia,invert-interrupt");
1543 value = tegra_pmc_readl(PMC_CNTRL);
1546 value |= PMC_CNTRL_INTR_POLARITY;
1548 value &= ~PMC_CNTRL_INTR_POLARITY;
1550 tegra_pmc_writel(value, PMC_CNTRL);
1554 early_initcall(tegra_pmc_early_init);