1 // SPDX-License-Identifier: GPL-2.0
3 * This file is part of STM32 ADC driver
5 * Copyright (C) 2016, STMicroelectronics - All Rights Reserved
8 * Inspired from: fsl-imx25-tsadc
12 #include <linux/bitfield.h>
13 #include <linux/clk.h>
14 #include <linux/interrupt.h>
15 #include <linux/irqchip/chained_irq.h>
16 #include <linux/irqdesc.h>
17 #include <linux/irqdomain.h>
18 #include <linux/mfd/syscon.h>
19 #include <linux/module.h>
21 #include <linux/of_platform.h>
22 #include <linux/platform_device.h>
23 #include <linux/pm_runtime.h>
24 #include <linux/property.h>
25 #include <linux/regmap.h>
26 #include <linux/regulator/consumer.h>
27 #include <linux/slab.h>
28 #include <linux/units.h>
30 #include "stm32-adc-core.h"
32 #define STM32_ADC_CORE_SLEEP_DELAY_MS 2000
34 /* SYSCFG registers */
35 #define STM32MP1_SYSCFG_PMCSETR 0x04
36 #define STM32MP1_SYSCFG_PMCCLRR 0x44
38 /* SYSCFG bit fields */
39 #define STM32MP1_SYSCFG_ANASWVDD_MASK BIT(9)
41 /* SYSCFG capability flags */
42 #define HAS_VBOOSTER BIT(0)
43 #define HAS_ANASWVDD BIT(1)
46 * struct stm32_adc_common_regs - stm32 common registers
47 * @csr: common status register offset
48 * @ccr: common control register offset
49 * @eoc_msk: array of eoc (end of conversion flag) masks in csr for adc1..n
50 * @ovr_msk: array of ovr (overrun flag) masks in csr for adc1..n
51 * @ier: interrupt enable register offset for each adc
52 * @eocie_msk: end of conversion interrupt enable mask in @ier
54 struct stm32_adc_common_regs {
57 u32 eoc_msk[STM32_ADC_MAX_ADCS];
58 u32 ovr_msk[STM32_ADC_MAX_ADCS];
63 struct stm32_adc_priv;
66 * struct stm32_adc_priv_cfg - stm32 core compatible configuration data
67 * @regs: common registers for all instances
68 * @clk_sel: clock selection routine
69 * @max_clk_rate_hz: maximum analog clock rate (Hz, from datasheet)
70 * @ipid: adc identification number
71 * @has_syscfg: SYSCFG capability flags
72 * @num_irqs: number of interrupt lines
73 * @num_adcs: maximum number of ADC instances in the common registers
75 struct stm32_adc_priv_cfg {
76 const struct stm32_adc_common_regs *regs;
77 int (*clk_sel)(struct platform_device *, struct stm32_adc_priv *);
80 unsigned int has_syscfg;
81 unsigned int num_irqs;
82 unsigned int num_adcs;
86 * struct stm32_adc_priv - stm32 ADC core private data
87 * @irq: irq(s) for ADC block
88 * @nb_adc_max: actual maximum number of instance per ADC block
89 * @domain: irq domain reference
90 * @aclk: clock reference for the analog circuitry
91 * @bclk: bus clock common for all ADCs, depends on part used
92 * @max_clk_rate: desired maximum clock rate
93 * @booster: booster supply reference
94 * @vdd: vdd supply reference
95 * @vdda: vdda analog supply reference
96 * @vref: regulator reference
97 * @vdd_uv: vdd supply voltage (microvolts)
98 * @vdda_uv: vdda supply voltage (microvolts)
99 * @cfg: compatible configuration data
100 * @common: common data for all ADC instances
101 * @ccr_bak: backup CCR in low power mode
102 * @syscfg: reference to syscon, system control registers
104 struct stm32_adc_priv {
105 int irq[STM32_ADC_MAX_ADCS];
106 unsigned int nb_adc_max;
107 struct irq_domain *domain;
111 struct regulator *booster;
112 struct regulator *vdd;
113 struct regulator *vdda;
114 struct regulator *vref;
117 const struct stm32_adc_priv_cfg *cfg;
118 struct stm32_adc_common common;
120 struct regmap *syscfg;
123 static struct stm32_adc_priv *to_stm32_adc_priv(struct stm32_adc_common *com)
125 return container_of(com, struct stm32_adc_priv, common);
128 /* STM32F4 ADC internal common clock prescaler division ratios */
129 static int stm32f4_pclk_div[] = {2, 4, 6, 8};
132 * stm32f4_adc_clk_sel() - Select stm32f4 ADC common clock prescaler
133 * @pdev: platform device
134 * @priv: stm32 ADC core private data
135 * Select clock prescaler used for analog conversions, before using ADC.
137 static int stm32f4_adc_clk_sel(struct platform_device *pdev,
138 struct stm32_adc_priv *priv)
144 /* stm32f4 has one clk input for analog (mandatory), enforce it here */
146 dev_err(&pdev->dev, "No 'adc' clock found\n");
150 rate = clk_get_rate(priv->aclk);
152 dev_err(&pdev->dev, "Invalid clock rate: 0\n");
156 for (i = 0; i < ARRAY_SIZE(stm32f4_pclk_div); i++) {
157 if ((rate / stm32f4_pclk_div[i]) <= priv->max_clk_rate)
160 if (i >= ARRAY_SIZE(stm32f4_pclk_div)) {
161 dev_err(&pdev->dev, "adc clk selection failed\n");
165 priv->common.rate = rate / stm32f4_pclk_div[i];
166 val = readl_relaxed(priv->common.base + STM32F4_ADC_CCR);
167 val &= ~STM32F4_ADC_ADCPRE_MASK;
168 val |= i << STM32F4_ADC_ADCPRE_SHIFT;
169 writel_relaxed(val, priv->common.base + STM32F4_ADC_CCR);
171 dev_dbg(&pdev->dev, "Using analog clock source at %ld kHz\n",
172 priv->common.rate / 1000);
178 * struct stm32h7_adc_ck_spec - specification for stm32h7 adc clock
179 * @ckmode: ADC clock mode, Async or sync with prescaler.
180 * @presc: prescaler bitfield for async clock mode
181 * @div: prescaler division ratio
183 struct stm32h7_adc_ck_spec {
189 static const struct stm32h7_adc_ck_spec stm32h7_adc_ckmodes_spec[] = {
190 /* 00: CK_ADC[1..3]: Asynchronous clock modes */
203 /* HCLK used: Synchronous clock modes (1, 2 or 4 prescaler) */
209 static int stm32h7_adc_clk_sel(struct platform_device *pdev,
210 struct stm32_adc_priv *priv)
212 u32 ckmode, presc, val;
216 /* stm32h7 bus clock is common for all ADC instances (mandatory) */
218 dev_err(&pdev->dev, "No 'bus' clock found\n");
223 * stm32h7 can use either 'bus' or 'adc' clock for analog circuitry.
224 * So, choice is to have bus clock mandatory and adc clock optional.
225 * If optional 'adc' clock has been found, then try to use it first.
229 * Asynchronous clock modes (e.g. ckmode == 0)
230 * From spec: PLL output musn't exceed max rate
232 rate = clk_get_rate(priv->aclk);
234 dev_err(&pdev->dev, "Invalid adc clock rate: 0\n");
238 /* If duty is an error, kindly use at least /2 divider */
239 duty = clk_get_scaled_duty_cycle(priv->aclk, 100);
241 dev_warn(&pdev->dev, "adc clock duty: %d\n", duty);
243 for (i = 0; i < ARRAY_SIZE(stm32h7_adc_ckmodes_spec); i++) {
244 ckmode = stm32h7_adc_ckmodes_spec[i].ckmode;
245 presc = stm32h7_adc_ckmodes_spec[i].presc;
246 div = stm32h7_adc_ckmodes_spec[i].div;
252 * For proper operation, clock duty cycle range is 49%
253 * to 51%. Apply at least /2 prescaler otherwise.
255 if (div == 1 && (duty < 49 || duty > 51))
258 if ((rate / div) <= priv->max_clk_rate)
263 /* Synchronous clock modes (e.g. ckmode is 1, 2 or 3) */
264 rate = clk_get_rate(priv->bclk);
266 dev_err(&pdev->dev, "Invalid bus clock rate: 0\n");
270 duty = clk_get_scaled_duty_cycle(priv->bclk, 100);
272 dev_warn(&pdev->dev, "bus clock duty: %d\n", duty);
274 for (i = 0; i < ARRAY_SIZE(stm32h7_adc_ckmodes_spec); i++) {
275 ckmode = stm32h7_adc_ckmodes_spec[i].ckmode;
276 presc = stm32h7_adc_ckmodes_spec[i].presc;
277 div = stm32h7_adc_ckmodes_spec[i].div;
282 if (div == 1 && (duty < 49 || duty > 51))
285 if ((rate / div) <= priv->max_clk_rate)
289 dev_err(&pdev->dev, "adc clk selection failed\n");
293 /* rate used later by each ADC instance to control BOOST mode */
294 priv->common.rate = rate / div;
296 /* Set common clock mode and prescaler */
297 val = readl_relaxed(priv->common.base + STM32H7_ADC_CCR);
298 val &= ~(STM32H7_CKMODE_MASK | STM32H7_PRESC_MASK);
299 val |= ckmode << STM32H7_CKMODE_SHIFT;
300 val |= presc << STM32H7_PRESC_SHIFT;
301 writel_relaxed(val, priv->common.base + STM32H7_ADC_CCR);
303 dev_dbg(&pdev->dev, "Using %s clock/%d source at %ld kHz\n",
304 ckmode ? "bus" : "adc", div, priv->common.rate / 1000);
309 /* STM32F4 common registers definitions */
310 static const struct stm32_adc_common_regs stm32f4_adc_common_regs = {
311 .csr = STM32F4_ADC_CSR,
312 .ccr = STM32F4_ADC_CCR,
313 .eoc_msk = { STM32F4_EOC1, STM32F4_EOC2, STM32F4_EOC3 },
314 .ovr_msk = { STM32F4_OVR1, STM32F4_OVR2, STM32F4_OVR3 },
315 .ier = STM32F4_ADC_CR1,
316 .eocie_msk = STM32F4_EOCIE,
319 /* STM32H7 common registers definitions */
320 static const struct stm32_adc_common_regs stm32h7_adc_common_regs = {
321 .csr = STM32H7_ADC_CSR,
322 .ccr = STM32H7_ADC_CCR,
323 .eoc_msk = { STM32H7_EOC_MST, STM32H7_EOC_SLV },
324 .ovr_msk = { STM32H7_OVR_MST, STM32H7_OVR_SLV },
325 .ier = STM32H7_ADC_IER,
326 .eocie_msk = STM32H7_EOCIE,
329 /* STM32MP13 common registers definitions */
330 static const struct stm32_adc_common_regs stm32mp13_adc_common_regs = {
331 .csr = STM32H7_ADC_CSR,
332 .ccr = STM32H7_ADC_CCR,
333 .eoc_msk = { STM32H7_EOC_MST },
334 .ovr_msk = { STM32H7_OVR_MST },
335 .ier = STM32H7_ADC_IER,
336 .eocie_msk = STM32H7_EOCIE,
339 static const unsigned int stm32_adc_offset[STM32_ADC_MAX_ADCS] = {
340 0, STM32_ADC_OFFSET, STM32_ADC_OFFSET * 2,
343 static unsigned int stm32_adc_eoc_enabled(struct stm32_adc_priv *priv,
346 u32 ier, offset = stm32_adc_offset[adc];
348 ier = readl_relaxed(priv->common.base + offset + priv->cfg->regs->ier);
350 return ier & priv->cfg->regs->eocie_msk;
353 /* ADC common interrupt for all instances */
354 static void stm32_adc_irq_handler(struct irq_desc *desc)
356 struct stm32_adc_priv *priv = irq_desc_get_handler_data(desc);
357 struct irq_chip *chip = irq_desc_get_chip(desc);
361 chained_irq_enter(chip, desc);
362 status = readl_relaxed(priv->common.base + priv->cfg->regs->csr);
365 * End of conversion may be handled by using IRQ or DMA. There may be a
366 * race here when two conversions complete at the same time on several
367 * ADCs. EOC may be read 'set' for several ADCs, with:
368 * - an ADC configured to use DMA (EOC triggers the DMA request, and
369 * is then automatically cleared by DR read in hardware)
370 * - an ADC configured to use IRQs (EOCIE bit is set. The handler must
371 * be called in this case)
372 * So both EOC status bit in CSR and EOCIE control bit must be checked
373 * before invoking the interrupt handler (e.g. call ISR only for
376 for (i = 0; i < priv->nb_adc_max; i++) {
377 if ((status & priv->cfg->regs->eoc_msk[i] &&
378 stm32_adc_eoc_enabled(priv, i)) ||
379 (status & priv->cfg->regs->ovr_msk[i]))
380 generic_handle_domain_irq(priv->domain, i);
383 chained_irq_exit(chip, desc);
386 static int stm32_adc_domain_map(struct irq_domain *d, unsigned int irq,
387 irq_hw_number_t hwirq)
389 irq_set_chip_data(irq, d->host_data);
390 irq_set_chip_and_handler(irq, &dummy_irq_chip, handle_level_irq);
395 static void stm32_adc_domain_unmap(struct irq_domain *d, unsigned int irq)
397 irq_set_chip_and_handler(irq, NULL, NULL);
398 irq_set_chip_data(irq, NULL);
401 static const struct irq_domain_ops stm32_adc_domain_ops = {
402 .map = stm32_adc_domain_map,
403 .unmap = stm32_adc_domain_unmap,
404 .xlate = irq_domain_xlate_onecell,
407 static int stm32_adc_irq_probe(struct platform_device *pdev,
408 struct stm32_adc_priv *priv)
410 struct device_node *np = pdev->dev.of_node;
414 * Interrupt(s) must be provided, depending on the compatible:
415 * - stm32f4/h7 shares a common interrupt line.
416 * - stm32mp1, has one line per ADC
418 for (i = 0; i < priv->cfg->num_irqs; i++) {
419 priv->irq[i] = platform_get_irq(pdev, i);
420 if (priv->irq[i] < 0)
424 priv->domain = irq_domain_add_simple(np, STM32_ADC_MAX_ADCS, 0,
425 &stm32_adc_domain_ops,
428 dev_err(&pdev->dev, "Failed to add irq domain\n");
432 for (i = 0; i < priv->cfg->num_irqs; i++) {
433 irq_set_chained_handler(priv->irq[i], stm32_adc_irq_handler);
434 irq_set_handler_data(priv->irq[i], priv);
440 static void stm32_adc_irq_remove(struct platform_device *pdev,
441 struct stm32_adc_priv *priv)
446 for (hwirq = 0; hwirq < priv->nb_adc_max; hwirq++)
447 irq_dispose_mapping(irq_find_mapping(priv->domain, hwirq));
448 irq_domain_remove(priv->domain);
450 for (i = 0; i < priv->cfg->num_irqs; i++)
451 irq_set_chained_handler(priv->irq[i], NULL);
454 static int stm32_adc_core_switches_supply_en(struct stm32_adc_priv *priv,
460 * On STM32H7 and STM32MP1, the ADC inputs are multiplexed with analog
461 * switches (via PCSEL) which have reduced performances when their
462 * supply is below 2.7V (vdda by default):
463 * - Voltage booster can be used, to get full ADC performances
464 * (increases power consumption).
465 * - Vdd can be used to supply them, if above 2.7V (STM32MP1 only).
467 * Recommended settings for ANASWVDD and EN_BOOSTER:
468 * - vdda < 2.7V but vdd > 2.7V: ANASWVDD = 1, EN_BOOSTER = 0 (stm32mp1)
469 * - vdda < 2.7V and vdd < 2.7V: ANASWVDD = 0, EN_BOOSTER = 1
470 * - vdda >= 2.7V: ANASWVDD = 0, EN_BOOSTER = 0 (default)
472 if (priv->vdda_uv < 2700000) {
473 if (priv->syscfg && priv->vdd_uv > 2700000) {
474 ret = regulator_enable(priv->vdd);
476 dev_err(dev, "vdd enable failed %d\n", ret);
480 ret = regmap_write(priv->syscfg,
481 STM32MP1_SYSCFG_PMCSETR,
482 STM32MP1_SYSCFG_ANASWVDD_MASK);
484 regulator_disable(priv->vdd);
485 dev_err(dev, "vdd select failed, %d\n", ret);
488 dev_dbg(dev, "analog switches supplied by vdd\n");
495 * This is optional, as this is a trade-off between
496 * analog performance and power consumption.
498 ret = regulator_enable(priv->booster);
500 dev_err(dev, "booster enable failed %d\n", ret);
503 dev_dbg(dev, "analog switches supplied by booster\n");
509 /* Fallback using vdda (default), nothing to do */
510 dev_dbg(dev, "analog switches supplied by vdda (%d uV)\n",
516 static void stm32_adc_core_switches_supply_dis(struct stm32_adc_priv *priv)
518 if (priv->vdda_uv < 2700000) {
519 if (priv->syscfg && priv->vdd_uv > 2700000) {
520 regmap_write(priv->syscfg, STM32MP1_SYSCFG_PMCCLRR,
521 STM32MP1_SYSCFG_ANASWVDD_MASK);
522 regulator_disable(priv->vdd);
526 regulator_disable(priv->booster);
530 static int stm32_adc_core_hw_start(struct device *dev)
532 struct stm32_adc_common *common = dev_get_drvdata(dev);
533 struct stm32_adc_priv *priv = to_stm32_adc_priv(common);
536 ret = regulator_enable(priv->vdda);
538 dev_err(dev, "vdda enable failed %d\n", ret);
542 ret = regulator_get_voltage(priv->vdda);
544 dev_err(dev, "vdda get voltage failed, %d\n", ret);
545 goto err_vdda_disable;
549 ret = stm32_adc_core_switches_supply_en(priv, dev);
551 goto err_vdda_disable;
553 ret = regulator_enable(priv->vref);
555 dev_err(dev, "vref enable failed\n");
556 goto err_switches_dis;
559 ret = clk_prepare_enable(priv->bclk);
561 dev_err(dev, "bus clk enable failed\n");
562 goto err_regulator_disable;
565 ret = clk_prepare_enable(priv->aclk);
567 dev_err(dev, "adc clk enable failed\n");
568 goto err_bclk_disable;
571 writel_relaxed(priv->ccr_bak, priv->common.base + priv->cfg->regs->ccr);
576 clk_disable_unprepare(priv->bclk);
577 err_regulator_disable:
578 regulator_disable(priv->vref);
580 stm32_adc_core_switches_supply_dis(priv);
582 regulator_disable(priv->vdda);
587 static void stm32_adc_core_hw_stop(struct device *dev)
589 struct stm32_adc_common *common = dev_get_drvdata(dev);
590 struct stm32_adc_priv *priv = to_stm32_adc_priv(common);
592 /* Backup CCR that may be lost (depends on power state to achieve) */
593 priv->ccr_bak = readl_relaxed(priv->common.base + priv->cfg->regs->ccr);
594 clk_disable_unprepare(priv->aclk);
595 clk_disable_unprepare(priv->bclk);
596 regulator_disable(priv->vref);
597 stm32_adc_core_switches_supply_dis(priv);
598 regulator_disable(priv->vdda);
601 static int stm32_adc_core_switches_probe(struct device *dev,
602 struct stm32_adc_priv *priv)
604 struct device_node *np = dev->of_node;
607 /* Analog switches supply can be controlled by syscfg (optional) */
608 priv->syscfg = syscon_regmap_lookup_by_phandle(np, "st,syscfg");
609 if (IS_ERR(priv->syscfg)) {
610 ret = PTR_ERR(priv->syscfg);
612 return dev_err_probe(dev, ret, "Can't probe syscfg\n");
617 /* Booster can be used to supply analog switches (optional) */
618 if (priv->cfg->has_syscfg & HAS_VBOOSTER &&
619 of_property_read_bool(np, "booster-supply")) {
620 priv->booster = devm_regulator_get_optional(dev, "booster");
621 if (IS_ERR(priv->booster)) {
622 ret = PTR_ERR(priv->booster);
624 return dev_err_probe(dev, ret, "can't get booster\n");
626 priv->booster = NULL;
630 /* Vdd can be used to supply analog switches (optional) */
631 if (priv->cfg->has_syscfg & HAS_ANASWVDD &&
632 of_property_read_bool(np, "vdd-supply")) {
633 priv->vdd = devm_regulator_get_optional(dev, "vdd");
634 if (IS_ERR(priv->vdd)) {
635 ret = PTR_ERR(priv->vdd);
637 return dev_err_probe(dev, ret, "can't get vdd\n");
644 ret = regulator_enable(priv->vdd);
646 dev_err(dev, "vdd enable failed %d\n", ret);
650 ret = regulator_get_voltage(priv->vdd);
652 dev_err(dev, "vdd get voltage failed %d\n", ret);
653 regulator_disable(priv->vdd);
658 regulator_disable(priv->vdd);
664 static int stm32_adc_probe_identification(struct platform_device *pdev,
665 struct stm32_adc_priv *priv)
667 struct device_node *np = pdev->dev.of_node;
668 struct device_node *child;
673 if (!priv->cfg->ipid)
676 id = FIELD_GET(STM32MP1_IPIDR_MASK,
677 readl_relaxed(priv->common.base + STM32MP1_ADC_IPDR));
678 if (id != priv->cfg->ipid) {
679 dev_err(&pdev->dev, "Unexpected IP version: 0x%x", id);
683 for_each_child_of_node(np, child) {
684 ret = of_property_read_string(child, "compatible", &compat);
687 /* Count child nodes with stm32 adc compatible */
688 if (strstr(compat, "st,stm32") && strstr(compat, "adc"))
692 val = readl_relaxed(priv->common.base + STM32MP1_ADC_HWCFGR0);
693 priv->nb_adc_max = FIELD_GET(STM32MP1_ADCNUM_MASK, val);
694 if (count > priv->nb_adc_max) {
695 dev_err(&pdev->dev, "Unexpected child number: %d", count);
699 val = readl_relaxed(priv->common.base + STM32MP1_ADC_VERR);
700 dev_dbg(&pdev->dev, "ADC version: %lu.%lu\n",
701 FIELD_GET(STM32MP1_MAJREV_MASK, val),
702 FIELD_GET(STM32MP1_MINREV_MASK, val));
707 static int stm32_adc_probe(struct platform_device *pdev)
709 struct stm32_adc_priv *priv;
710 struct device *dev = &pdev->dev;
711 struct device_node *np = pdev->dev.of_node;
712 struct resource *res;
716 if (!pdev->dev.of_node)
719 priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
722 platform_set_drvdata(pdev, &priv->common);
724 priv->cfg = device_get_match_data(dev);
725 priv->nb_adc_max = priv->cfg->num_adcs;
726 spin_lock_init(&priv->common.lock);
728 priv->common.base = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
729 if (IS_ERR(priv->common.base))
730 return PTR_ERR(priv->common.base);
731 priv->common.phys_base = res->start;
733 priv->vdda = devm_regulator_get(&pdev->dev, "vdda");
734 if (IS_ERR(priv->vdda))
735 return dev_err_probe(&pdev->dev, PTR_ERR(priv->vdda),
736 "vdda get failed\n");
738 priv->vref = devm_regulator_get(&pdev->dev, "vref");
739 if (IS_ERR(priv->vref))
740 return dev_err_probe(&pdev->dev, PTR_ERR(priv->vref),
741 "vref get failed\n");
743 priv->aclk = devm_clk_get_optional(&pdev->dev, "adc");
744 if (IS_ERR(priv->aclk))
745 return dev_err_probe(&pdev->dev, PTR_ERR(priv->aclk),
746 "Can't get 'adc' clock\n");
748 priv->bclk = devm_clk_get_optional(&pdev->dev, "bus");
749 if (IS_ERR(priv->bclk))
750 return dev_err_probe(&pdev->dev, PTR_ERR(priv->bclk),
751 "Can't get 'bus' clock\n");
753 ret = stm32_adc_core_switches_probe(dev, priv);
757 pm_runtime_get_noresume(dev);
758 pm_runtime_set_active(dev);
759 pm_runtime_set_autosuspend_delay(dev, STM32_ADC_CORE_SLEEP_DELAY_MS);
760 pm_runtime_use_autosuspend(dev);
761 pm_runtime_enable(dev);
763 ret = stm32_adc_core_hw_start(dev);
767 ret = stm32_adc_probe_identification(pdev, priv);
771 ret = regulator_get_voltage(priv->vref);
773 dev_err(&pdev->dev, "vref get voltage failed, %d\n", ret);
776 priv->common.vref_mv = ret / 1000;
777 dev_dbg(&pdev->dev, "vref+=%dmV\n", priv->common.vref_mv);
779 ret = of_property_read_u32(pdev->dev.of_node, "st,max-clk-rate-hz",
782 priv->max_clk_rate = min(max_rate, priv->cfg->max_clk_rate_hz);
784 priv->max_clk_rate = priv->cfg->max_clk_rate_hz;
786 ret = priv->cfg->clk_sel(pdev, priv);
790 ret = stm32_adc_irq_probe(pdev, priv);
794 ret = of_platform_populate(np, NULL, NULL, &pdev->dev);
796 dev_err(&pdev->dev, "failed to populate DT children\n");
800 pm_runtime_mark_last_busy(dev);
801 pm_runtime_put_autosuspend(dev);
806 stm32_adc_irq_remove(pdev, priv);
808 stm32_adc_core_hw_stop(dev);
810 pm_runtime_disable(dev);
811 pm_runtime_set_suspended(dev);
812 pm_runtime_put_noidle(dev);
817 static void stm32_adc_remove(struct platform_device *pdev)
819 struct stm32_adc_common *common = platform_get_drvdata(pdev);
820 struct stm32_adc_priv *priv = to_stm32_adc_priv(common);
822 pm_runtime_get_sync(&pdev->dev);
823 of_platform_depopulate(&pdev->dev);
824 stm32_adc_irq_remove(pdev, priv);
825 stm32_adc_core_hw_stop(&pdev->dev);
826 pm_runtime_disable(&pdev->dev);
827 pm_runtime_set_suspended(&pdev->dev);
828 pm_runtime_put_noidle(&pdev->dev);
831 static int stm32_adc_core_runtime_suspend(struct device *dev)
833 stm32_adc_core_hw_stop(dev);
838 static int stm32_adc_core_runtime_resume(struct device *dev)
840 return stm32_adc_core_hw_start(dev);
843 static int stm32_adc_core_runtime_idle(struct device *dev)
845 pm_runtime_mark_last_busy(dev);
850 static DEFINE_RUNTIME_DEV_PM_OPS(stm32_adc_core_pm_ops,
851 stm32_adc_core_runtime_suspend,
852 stm32_adc_core_runtime_resume,
853 stm32_adc_core_runtime_idle);
855 static const struct stm32_adc_priv_cfg stm32f4_adc_priv_cfg = {
856 .regs = &stm32f4_adc_common_regs,
857 .clk_sel = stm32f4_adc_clk_sel,
858 .max_clk_rate_hz = 36000000,
863 static const struct stm32_adc_priv_cfg stm32h7_adc_priv_cfg = {
864 .regs = &stm32h7_adc_common_regs,
865 .clk_sel = stm32h7_adc_clk_sel,
866 .max_clk_rate_hz = 36000000,
867 .has_syscfg = HAS_VBOOSTER,
872 static const struct stm32_adc_priv_cfg stm32mp1_adc_priv_cfg = {
873 .regs = &stm32h7_adc_common_regs,
874 .clk_sel = stm32h7_adc_clk_sel,
875 .max_clk_rate_hz = 36000000,
876 .has_syscfg = HAS_VBOOSTER | HAS_ANASWVDD,
877 .ipid = STM32MP15_IPIDR_NUMBER,
881 static const struct stm32_adc_priv_cfg stm32mp13_adc_priv_cfg = {
882 .regs = &stm32mp13_adc_common_regs,
883 .clk_sel = stm32h7_adc_clk_sel,
884 .max_clk_rate_hz = 75 * HZ_PER_MHZ,
885 .ipid = STM32MP13_IPIDR_NUMBER,
889 static const struct of_device_id stm32_adc_of_match[] = {
891 .compatible = "st,stm32f4-adc-core",
892 .data = (void *)&stm32f4_adc_priv_cfg
894 .compatible = "st,stm32h7-adc-core",
895 .data = (void *)&stm32h7_adc_priv_cfg
897 .compatible = "st,stm32mp1-adc-core",
898 .data = (void *)&stm32mp1_adc_priv_cfg
900 .compatible = "st,stm32mp13-adc-core",
901 .data = (void *)&stm32mp13_adc_priv_cfg
905 MODULE_DEVICE_TABLE(of, stm32_adc_of_match);
907 static struct platform_driver stm32_adc_driver = {
908 .probe = stm32_adc_probe,
909 .remove_new = stm32_adc_remove,
911 .name = "stm32-adc-core",
912 .of_match_table = stm32_adc_of_match,
913 .pm = pm_ptr(&stm32_adc_core_pm_ops),
916 module_platform_driver(stm32_adc_driver);
919 MODULE_DESCRIPTION("STMicroelectronics STM32 ADC core driver");
920 MODULE_LICENSE("GPL v2");
921 MODULE_ALIAS("platform:stm32-adc-core");