forked from ~ljy/RK356X_SDK_RELEASE
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2024-01-05 071106ecf68c401173c58808b1cf5f68cc50d390 
 kernel/drivers/i2c/busses/i2c-qcom-geni.c
....@@ -1,6 +1,7 @@
11 // SPDX-License-Identifier: GPL-2.0
22 // Copyright (c) 2017-2018, The Linux Foundation. All rights reserved.
33 
4
+#include <linux/acpi.h>
45 #include <linux/clk.h>
56 #include <linux/dma-mapping.h>
67 #include <linux/err.h>
....@@ -9,7 +10,6 @@
910 #include <linux/io.h>
1011 #include <linux/module.h>
1112 #include <linux/of.h>
12
-#include <linux/of_platform.h>
1313 #include <linux/platform_device.h>
1414 #include <linux/pm_runtime.h>
1515 #include <linux/qcom-geni-se.h>
....@@ -86,6 +86,9 @@
8686 	u32 clk_freq_out;
8787 	const struct geni_i2c_clk_fld *clk_fld;
8888 	int suspended;
89
+	void *dma_buf;
90
+	size_t xfer_len;
91
+	dma_addr_t dma_addr;
8992 };
9093 
9194 struct geni_i2c_err_log {
....@@ -201,21 +204,22 @@
201204 static irqreturn_t geni_i2c_irq(int irq, void *dev)
202205 {
203206 	struct geni_i2c_dev *gi2c = dev;
204
-	int j;
207
+	void __iomem *base = gi2c->se.base;
208
+	int j, p;
205209 	u32 m_stat;
206210 	u32 rx_st;
207211 	u32 dm_tx_st;
208212 	u32 dm_rx_st;
209213 	u32 dma;
214
+	u32 val;
210215 	struct i2c_msg *cur;
211
-	unsigned long flags;
212216 
213
-	spin_lock_irqsave(&gi2c->lock, flags);
214
-	m_stat = readl_relaxed(gi2c->se.base + SE_GENI_M_IRQ_STATUS);
215
-	rx_st = readl_relaxed(gi2c->se.base + SE_GENI_RX_FIFO_STATUS);
216
-	dm_tx_st = readl_relaxed(gi2c->se.base + SE_DMA_TX_IRQ_STAT);
217
-	dm_rx_st = readl_relaxed(gi2c->se.base + SE_DMA_RX_IRQ_STAT);
218
-	dma = readl_relaxed(gi2c->se.base + SE_GENI_DMA_MODE_EN);
217
+	spin_lock(&gi2c->lock);
218
+	m_stat = readl_relaxed(base + SE_GENI_M_IRQ_STATUS);
219
+	rx_st = readl_relaxed(base + SE_GENI_RX_FIFO_STATUS);
220
+	dm_tx_st = readl_relaxed(base + SE_DMA_TX_IRQ_STAT);
221
+	dm_rx_st = readl_relaxed(base + SE_DMA_RX_IRQ_STAT);
222
+	dma = readl_relaxed(base + SE_GENI_DMA_MODE_EN);
219223 	cur = gi2c->cur;
220224 
221225 	if (!cur ||
....@@ -238,26 +242,17 @@
238242 
239243 		/* Disable the TX Watermark interrupt to stop TX */
240244 		if (!dma)
241
-			writel_relaxed(0, gi2c->se.base +
242
-					   SE_GENI_TX_WATERMARK_REG);
243
-		goto irqret;
244
-	}
245
-
246
-	if (dma) {
245
+			writel_relaxed(0, base + SE_GENI_TX_WATERMARK_REG);
246
+	} else if (dma) {
247247 		dev_dbg(gi2c->se.dev, "i2c dma tx:0x%x, dma rx:0x%x\n",
248248 			dm_tx_st, dm_rx_st);
249
-		goto irqret;
250
-	}
251
-
252
-	if (cur->flags & I2C_M_RD &&
253
-	    m_stat & (M_RX_FIFO_WATERMARK_EN | M_RX_FIFO_LAST_EN)) {
249
+	} else if (cur->flags & I2C_M_RD &&
250
+		   m_stat & (M_RX_FIFO_WATERMARK_EN | M_RX_FIFO_LAST_EN)) {
254251 		u32 rxcnt = rx_st & RX_FIFO_WC_MSK;
255252 
256253 		for (j = 0; j < rxcnt; j++) {
257
-			u32 val;
258
-			int p = 0;
259
-
260
-			val = readl_relaxed(gi2c->se.base + SE_GENI_RX_FIFOn);
254
+			p = 0;
255
+			val = readl_relaxed(base + SE_GENI_RX_FIFOn);
261256 			while (gi2c->cur_rd < cur->len && p < sizeof(val)) {
262257 				cur->buf[gi2c->cur_rd++] = val & 0xff;
263258 				val >>= 8;
....@@ -270,44 +265,39 @@
270265 		   m_stat & M_TX_FIFO_WATERMARK_EN) {
271266 		for (j = 0; j < gi2c->tx_wm; j++) {
272267 			u32 temp;
273
-			u32 val = 0;
274
-			int p = 0;
275268 
269
+			val = 0;
270
+			p = 0;
276271 			while (gi2c->cur_wr < cur->len && p < sizeof(val)) {
277272 				temp = cur->buf[gi2c->cur_wr++];
278273 				val |= temp << (p * 8);
279274 				p++;
280275 			}
281
-			writel_relaxed(val, gi2c->se.base + SE_GENI_TX_FIFOn);
276
+			writel_relaxed(val, base + SE_GENI_TX_FIFOn);
282277 			/* TX Complete, Disable the TX Watermark interrupt */
283278 			if (gi2c->cur_wr == cur->len) {
284
-				writel_relaxed(0, gi2c->se.base +
285
-						SE_GENI_TX_WATERMARK_REG);
279
+				writel_relaxed(0, base + SE_GENI_TX_WATERMARK_REG);
286280 				break;
287281 			}
288282 		}
289283 	}
290
-irqret:
284
+
291285 	if (m_stat)
292
-		writel_relaxed(m_stat, gi2c->se.base + SE_GENI_M_IRQ_CLEAR);
286
+		writel_relaxed(m_stat, base + SE_GENI_M_IRQ_CLEAR);
293287 
294
-	if (dma) {
295
-		if (dm_tx_st)
296
-			writel_relaxed(dm_tx_st, gi2c->se.base +
297
-						SE_DMA_TX_IRQ_CLR);
298
-		if (dm_rx_st)
299
-			writel_relaxed(dm_rx_st, gi2c->se.base +
300
-						SE_DMA_RX_IRQ_CLR);
301
-	}
288
+	if (dma && dm_tx_st)
289
+		writel_relaxed(dm_tx_st, base + SE_DMA_TX_IRQ_CLR);
290
+	if (dma && dm_rx_st)
291
+		writel_relaxed(dm_rx_st, base + SE_DMA_RX_IRQ_CLR);
292
+
302293 	/* if this is err with done-bit not set, handle that through timeout. */
303
-	if (m_stat & M_CMD_DONE_EN || m_stat & M_CMD_ABORT_EN)
304
-		complete(&gi2c->done);
305
-	else if (dm_tx_st & TX_DMA_DONE || dm_tx_st & TX_RESET_DONE)
306
-		complete(&gi2c->done);
307
-	else if (dm_rx_st & RX_DMA_DONE || dm_rx_st & RX_RESET_DONE)
294
+	if (m_stat & M_CMD_DONE_EN || m_stat & M_CMD_ABORT_EN ||
295
+	    dm_tx_st & TX_DMA_DONE || dm_tx_st & TX_RESET_DONE ||
296
+	    dm_rx_st & RX_DMA_DONE || dm_rx_st & RX_RESET_DONE)
308297 		complete(&gi2c->done);
309298 
310
-	spin_unlock_irqrestore(&gi2c->lock, flags);
299
+	spin_unlock(&gi2c->lock);
300
+
311301 	return IRQ_HANDLED;
312302 }
313303 
....@@ -361,92 +351,112 @@
361351 		dev_err(gi2c->se.dev, "Timeout resetting TX_FSM\n");
362352 }
363353 
354
+static void geni_i2c_rx_msg_cleanup(struct geni_i2c_dev *gi2c,
355
+				     struct i2c_msg *cur)
356
+{
357
+	gi2c->cur_rd = 0;
358
+	if (gi2c->dma_buf) {
359
+		if (gi2c->err)
360
+			geni_i2c_rx_fsm_rst(gi2c);
361
+		geni_se_rx_dma_unprep(&gi2c->se, gi2c->dma_addr, gi2c->xfer_len);
362
+		i2c_put_dma_safe_msg_buf(gi2c->dma_buf, cur, !gi2c->err);
363
+	}
364
+}
365
+
366
+static void geni_i2c_tx_msg_cleanup(struct geni_i2c_dev *gi2c,
367
+				     struct i2c_msg *cur)
368
+{
369
+	gi2c->cur_wr = 0;
370
+	if (gi2c->dma_buf) {
371
+		if (gi2c->err)
372
+			geni_i2c_tx_fsm_rst(gi2c);
373
+		geni_se_tx_dma_unprep(&gi2c->se, gi2c->dma_addr, gi2c->xfer_len);
374
+		i2c_put_dma_safe_msg_buf(gi2c->dma_buf, cur, !gi2c->err);
375
+	}
376
+}
377
+
364378 static int geni_i2c_rx_one_msg(struct geni_i2c_dev *gi2c, struct i2c_msg *msg,
365379 				u32 m_param)
366380 {
367
-	dma_addr_t rx_dma;
368
-	enum geni_se_xfer_mode mode;
369
-	unsigned long time_left = XFER_TIMEOUT;
370
-	void *dma_buf;
381
+	dma_addr_t rx_dma = 0;
382
+	unsigned long time_left;
383
+	void *dma_buf = NULL;
384
+	struct geni_se *se = &gi2c->se;
385
+	size_t len = msg->len;
386
+	struct i2c_msg *cur;
371387 
372
-	gi2c->cur = msg;
373
-	mode = GENI_SE_FIFO;
374
-	dma_buf = i2c_get_dma_safe_msg_buf(msg, 32);
388
+	if (!of_machine_is_compatible("lenovo,yoga-c630"))
389
+		dma_buf = i2c_get_dma_safe_msg_buf(msg, 32);
390
+
375391 	if (dma_buf)
376
-		mode = GENI_SE_DMA;
392
+		geni_se_select_mode(se, GENI_SE_DMA);
393
+	else
394
+		geni_se_select_mode(se, GENI_SE_FIFO);
377395 
378
-	geni_se_select_mode(&gi2c->se, mode);
379
-	writel_relaxed(msg->len, gi2c->se.base + SE_I2C_RX_TRANS_LEN);
380
-	geni_se_setup_m_cmd(&gi2c->se, I2C_READ, m_param);
381
-	if (mode == GENI_SE_DMA) {
382
-		int ret;
396
+	writel_relaxed(len, se->base + SE_I2C_RX_TRANS_LEN);
397
+	geni_se_setup_m_cmd(se, I2C_READ, m_param);
383398 
384
-		ret = geni_se_rx_dma_prep(&gi2c->se, dma_buf, msg->len,
385
-								&rx_dma);
386
-		if (ret) {
387
-			mode = GENI_SE_FIFO;
388
-			geni_se_select_mode(&gi2c->se, mode);
389
-			i2c_put_dma_safe_msg_buf(dma_buf, msg, false);
390
-		}
399
+	if (dma_buf && geni_se_rx_dma_prep(se, dma_buf, len, &rx_dma)) {
400
+		geni_se_select_mode(se, GENI_SE_FIFO);
401
+		i2c_put_dma_safe_msg_buf(dma_buf, msg, false);
402
+		dma_buf = NULL;
403
+	} else {
404
+		gi2c->xfer_len = len;
405
+		gi2c->dma_addr = rx_dma;
406
+		gi2c->dma_buf = dma_buf;
391407 	}
392408 
409
+	cur = gi2c->cur;
393410 	time_left = wait_for_completion_timeout(&gi2c->done, XFER_TIMEOUT);
394411 	if (!time_left)
395412 		geni_i2c_abort_xfer(gi2c);
396413 
397
-	gi2c->cur_rd = 0;
398
-	if (mode == GENI_SE_DMA) {
399
-		if (gi2c->err)
400
-			geni_i2c_rx_fsm_rst(gi2c);
401
-		geni_se_rx_dma_unprep(&gi2c->se, rx_dma, msg->len);
402
-		i2c_put_dma_safe_msg_buf(dma_buf, msg, !gi2c->err);
403
-	}
414
+	geni_i2c_rx_msg_cleanup(gi2c, cur);
415
+
404416 	return gi2c->err;
405417 }
406418 
407419 static int geni_i2c_tx_one_msg(struct geni_i2c_dev *gi2c, struct i2c_msg *msg,
408420 				u32 m_param)
409421 {
410
-	dma_addr_t tx_dma;
411
-	enum geni_se_xfer_mode mode;
422
+	dma_addr_t tx_dma = 0;
412423 	unsigned long time_left;
413
-	void *dma_buf;
424
+	void *dma_buf = NULL;
425
+	struct geni_se *se = &gi2c->se;
426
+	size_t len = msg->len;
427
+	struct i2c_msg *cur;
414428 
415
-	gi2c->cur = msg;
416
-	mode = GENI_SE_FIFO;
417
-	dma_buf = i2c_get_dma_safe_msg_buf(msg, 32);
429
+	if (!of_machine_is_compatible("lenovo,yoga-c630"))
430
+		dma_buf = i2c_get_dma_safe_msg_buf(msg, 32);
431
+
418432 	if (dma_buf)
419
-		mode = GENI_SE_DMA;
433
+		geni_se_select_mode(se, GENI_SE_DMA);
434
+	else
435
+		geni_se_select_mode(se, GENI_SE_FIFO);
420436 
421
-	geni_se_select_mode(&gi2c->se, mode);
422
-	writel_relaxed(msg->len, gi2c->se.base + SE_I2C_TX_TRANS_LEN);
423
-	geni_se_setup_m_cmd(&gi2c->se, I2C_WRITE, m_param);
424
-	if (mode == GENI_SE_DMA) {
425
-		int ret;
437
+	writel_relaxed(len, se->base + SE_I2C_TX_TRANS_LEN);
438
+	geni_se_setup_m_cmd(se, I2C_WRITE, m_param);
426439 
427
-		ret = geni_se_tx_dma_prep(&gi2c->se, dma_buf, msg->len,
428
-								&tx_dma);
429
-		if (ret) {
430
-			mode = GENI_SE_FIFO;
431
-			geni_se_select_mode(&gi2c->se, mode);
432
-			i2c_put_dma_safe_msg_buf(dma_buf, msg, false);
433
-		}
440
+	if (dma_buf && geni_se_tx_dma_prep(se, dma_buf, len, &tx_dma)) {
441
+		geni_se_select_mode(se, GENI_SE_FIFO);
442
+		i2c_put_dma_safe_msg_buf(dma_buf, msg, false);
443
+		dma_buf = NULL;
444
+	} else {
445
+		gi2c->xfer_len = len;
446
+		gi2c->dma_addr = tx_dma;
447
+		gi2c->dma_buf = dma_buf;
434448 	}
435449 
436
-	if (mode == GENI_SE_FIFO) /* Get FIFO IRQ */
437
-		writel_relaxed(1, gi2c->se.base + SE_GENI_TX_WATERMARK_REG);
450
+	if (!dma_buf) /* Get FIFO IRQ */
451
+		writel_relaxed(1, se->base + SE_GENI_TX_WATERMARK_REG);
438452 
453
+	cur = gi2c->cur;
439454 	time_left = wait_for_completion_timeout(&gi2c->done, XFER_TIMEOUT);
440455 	if (!time_left)
441456 		geni_i2c_abort_xfer(gi2c);
442457 
443
-	gi2c->cur_wr = 0;
444
-	if (mode == GENI_SE_DMA) {
445
-		if (gi2c->err)
446
-			geni_i2c_tx_fsm_rst(gi2c);
447
-		geni_se_tx_dma_unprep(&gi2c->se, tx_dma, msg->len);
448
-		i2c_put_dma_safe_msg_buf(dma_buf, msg, !gi2c->err);
449
-	}
458
+	geni_i2c_tx_msg_cleanup(gi2c, cur);
459
+
450460 	return gi2c->err;
451461 }
452462 
....@@ -474,6 +484,7 @@
474484 
475485 		m_param |= ((msgs[i].addr << SLV_ADDR_SHFT) & SLV_ADDR_MSK);
476486 
487
+		gi2c->cur = &msgs[i];
477488 		if (msgs[i].flags & I2C_M_RD)
478489 			ret = geni_i2c_rx_one_msg(gi2c, &msgs[i], m_param);
479490 		else
....@@ -502,48 +513,54 @@
502513 	.functionality	= geni_i2c_func,
503514 };
504515 
516
+#ifdef CONFIG_ACPI
517
+static const struct acpi_device_id geni_i2c_acpi_match[] = {
518
+	{ "QCOM0220"},
519
+	{ },
520
+};
521
+MODULE_DEVICE_TABLE(acpi, geni_i2c_acpi_match);
522
+#endif
523
+
505524 static int geni_i2c_probe(struct platform_device *pdev)
506525 {
507526 	struct geni_i2c_dev *gi2c;
508527 	struct resource *res;
509528 	u32 proto, tx_depth;
510529 	int ret;
530
+	struct device *dev = &pdev->dev;
511531 
512
-	gi2c = devm_kzalloc(&pdev->dev, sizeof(*gi2c), GFP_KERNEL);
532
+	gi2c = devm_kzalloc(dev, sizeof(*gi2c), GFP_KERNEL);
513533 	if (!gi2c)
514534 		return -ENOMEM;
515535 
516
-	gi2c->se.dev = &pdev->dev;
517
-	gi2c->se.wrapper = dev_get_drvdata(pdev->dev.parent);
536
+	gi2c->se.dev = dev;
537
+	gi2c->se.wrapper = dev_get_drvdata(dev->parent);
518538 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
519
-	gi2c->se.base = devm_ioremap_resource(&pdev->dev, res);
539
+	gi2c->se.base = devm_ioremap_resource(dev, res);
520540 	if (IS_ERR(gi2c->se.base))
521541 		return PTR_ERR(gi2c->se.base);
522542 
523
-	gi2c->se.clk = devm_clk_get(&pdev->dev, "se");
524
-	if (IS_ERR(gi2c->se.clk)) {
525
-		ret = PTR_ERR(gi2c->se.clk);
526
-		dev_err(&pdev->dev, "Err getting SE Core clk %d\n", ret);
527
-		return ret;
528
-	}
543
+	gi2c->se.clk = devm_clk_get(dev, "se");
544
+	if (IS_ERR(gi2c->se.clk) && !has_acpi_companion(dev))
545
+		return PTR_ERR(gi2c->se.clk);
529546 
530
-	ret = device_property_read_u32(&pdev->dev, "clock-frequency",
531
-							&gi2c->clk_freq_out);
547
+	ret = device_property_read_u32(dev, "clock-frequency",
548
+				       &gi2c->clk_freq_out);
532549 	if (ret) {
533
-		dev_info(&pdev->dev,
534
-			"Bus frequency not specified, default to 100kHz.\n");
550
+		dev_info(dev, "Bus frequency not specified, default to 100kHz.\n");
535551 		gi2c->clk_freq_out = KHZ(100);
536552 	}
537553 
554
+	if (has_acpi_companion(dev))
555
+		ACPI_COMPANION_SET(&gi2c->adap.dev, ACPI_COMPANION(dev));
556
+
538557 	gi2c->irq = platform_get_irq(pdev, 0);
539
-	if (gi2c->irq < 0) {
540
-		dev_err(&pdev->dev, "IRQ error for i2c-geni\n");
558
+	if (gi2c->irq < 0)
541559 		return gi2c->irq;
542
-	}
543560 
544561 	ret = geni_i2c_clk_map_idx(gi2c);
545562 	if (ret) {
546
-		dev_err(&pdev->dev, "Invalid clk frequency %d Hz: %d\n",
563
+		dev_err(dev, "Invalid clk frequency %d Hz: %d\n",
547564 			gi2c->clk_freq_out, ret);
548565 		return ret;
549566 	}
....@@ -552,29 +569,45 @@
552569 	init_completion(&gi2c->done);
553570 	spin_lock_init(&gi2c->lock);
554571 	platform_set_drvdata(pdev, gi2c);
555
-	ret = devm_request_irq(&pdev->dev, gi2c->irq, geni_i2c_irq,
556
-			       IRQF_TRIGGER_HIGH, "i2c_geni", gi2c);
572
+	ret = devm_request_irq(dev, gi2c->irq, geni_i2c_irq, 0,
573
+			       dev_name(dev), gi2c);
557574 	if (ret) {
558
-		dev_err(&pdev->dev, "Request_irq failed:%d: err:%d\n",
575
+		dev_err(dev, "Request_irq failed:%d: err:%d\n",
559576 			gi2c->irq, ret);
560577 		return ret;
561578 	}
562579 	/* Disable the interrupt so that the system can enter low-power mode */
563580 	disable_irq(gi2c->irq);
564581 	i2c_set_adapdata(&gi2c->adap, gi2c);
565
-	gi2c->adap.dev.parent = &pdev->dev;
566
-	gi2c->adap.dev.of_node = pdev->dev.of_node;
582
+	gi2c->adap.dev.parent = dev;
583
+	gi2c->adap.dev.of_node = dev->of_node;
567584 	strlcpy(gi2c->adap.name, "Geni-I2C", sizeof(gi2c->adap.name));
585
+
586
+	ret = geni_icc_get(&gi2c->se, "qup-memory");
587
+	if (ret)
588
+		return ret;
589
+	/*
590
+	 * Set the bus quota for core and cpu to a reasonable value for
591
+	 * register access.
592
+	 * Set quota for DDR based on bus speed.
593
+	 */
594
+	gi2c->se.icc_paths[GENI_TO_CORE].avg_bw = GENI_DEFAULT_BW;
595
+	gi2c->se.icc_paths[CPU_TO_GENI].avg_bw = GENI_DEFAULT_BW;
596
+	gi2c->se.icc_paths[GENI_TO_DDR].avg_bw = Bps_to_icc(gi2c->clk_freq_out);
597
+
598
+	ret = geni_icc_set_bw(&gi2c->se);
599
+	if (ret)
600
+		return ret;
568601 
569602 	ret = geni_se_resources_on(&gi2c->se);
570603 	if (ret) {
571
-		dev_err(&pdev->dev, "Error turning on resources %d\n", ret);
604
+		dev_err(dev, "Error turning on resources %d\n", ret);
572605 		return ret;
573606 	}
574607 	proto = geni_se_read_proto(&gi2c->se);
575608 	tx_depth = geni_se_get_tx_fifo_depth(&gi2c->se);
576609 	if (proto != GENI_SE_I2C) {
577
-		dev_err(&pdev->dev, "Invalid proto %d\n", proto);
610
+		dev_err(dev, "Invalid proto %d\n", proto);
578611 		geni_se_resources_off(&gi2c->se);
579612 		return -ENXIO;
580613 	}
....@@ -584,11 +617,15 @@
584617 							true, true, true);
585618 	ret = geni_se_resources_off(&gi2c->se);
586619 	if (ret) {
587
-		dev_err(&pdev->dev, "Error turning off resources %d\n", ret);
620
+		dev_err(dev, "Error turning off resources %d\n", ret);
588621 		return ret;
589622 	}
590623 
591
-	dev_dbg(&pdev->dev, "i2c fifo/se-dma mode. fifo depth:%d\n", tx_depth);
624
+	ret = geni_icc_disable(&gi2c->se);
625
+	if (ret)
626
+		return ret;
627
+
628
+	dev_dbg(dev, "i2c fifo/se-dma mode. fifo depth:%d\n", tx_depth);
592629 
593630 	gi2c->suspended = 1;
594631 	pm_runtime_set_suspended(gi2c->se.dev);
....@@ -598,10 +635,12 @@
598635 
599636 	ret = i2c_add_adapter(&gi2c->adap);
600637 	if (ret) {
601
-		dev_err(&pdev->dev, "Error adding i2c adapter %d\n", ret);
638
+		dev_err(dev, "Error adding i2c adapter %d\n", ret);
602639 		pm_runtime_disable(gi2c->se.dev);
603640 		return ret;
604641 	}
642
+
643
+	dev_dbg(dev, "Geni-I2C adaptor successfully added\n");
605644 
606645 	return 0;
607646 }
....@@ -613,6 +652,14 @@
613652 	i2c_del_adapter(&gi2c->adap);
614653 	pm_runtime_disable(gi2c->se.dev);
615654 	return 0;
655
+}
656
+
657
+static void geni_i2c_shutdown(struct platform_device *pdev)
658
+{
659
+	struct geni_i2c_dev *gi2c = platform_get_drvdata(pdev);
660
+
661
+	/* Make client i2c transfers start failing */
662
+	i2c_mark_adapter_suspended(&gi2c->adap);
616663 }
617664 
618665 static int __maybe_unused geni_i2c_runtime_suspend(struct device *dev)
....@@ -630,13 +677,17 @@
630677 		gi2c->suspended = 1;
631678 	}
632679 
633
-	return 0;
680
+	return geni_icc_disable(&gi2c->se);
634681 }
635682 
636683 static int __maybe_unused geni_i2c_runtime_resume(struct device *dev)
637684 {
638685 	int ret;
639686 	struct geni_i2c_dev *gi2c = dev_get_drvdata(dev);
687
+
688
+	ret = geni_icc_enable(&gi2c->se);
689
+	if (ret)
690
+		return ret;
640691 
641692 	ret = geni_se_resources_on(&gi2c->se);
642693 	if (ret)
....@@ -651,6 +702,8 @@
651702 {
652703 	struct geni_i2c_dev *gi2c = dev_get_drvdata(dev);
653704 
705
+	i2c_mark_adapter_suspended(&gi2c->adap);
706
+
654707 	if (!gi2c->suspended) {
655708 		geni_i2c_runtime_suspend(dev);
656709 		pm_runtime_disable(dev);
....@@ -660,8 +713,16 @@
660713 	return 0;
661714 }
662715 
716
+static int __maybe_unused geni_i2c_resume_noirq(struct device *dev)
717
+{
718
+	struct geni_i2c_dev *gi2c = dev_get_drvdata(dev);
719
+
720
+	i2c_mark_adapter_resumed(&gi2c->adap);
721
+	return 0;
722
+}
723
+
663724 static const struct dev_pm_ops geni_i2c_pm_ops = {
664
-	SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(geni_i2c_suspend_noirq, NULL)
725
+	SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(geni_i2c_suspend_noirq, geni_i2c_resume_noirq)
665726 	SET_RUNTIME_PM_OPS(geni_i2c_runtime_suspend, geni_i2c_runtime_resume,
666727 									NULL)
667728 };
....@@ -675,10 +736,12 @@
675736 static struct platform_driver geni_i2c_driver = {
676737 	.probe  = geni_i2c_probe,
677738 	.remove = geni_i2c_remove,
739
+	.shutdown = geni_i2c_shutdown,
678740 	.driver = {
679741 		.name = "geni_i2c",
680742 		.pm = &geni_i2c_pm_ops,
681743 		.of_match_table = geni_i2c_dt_match,
744
+		.acpi_match_table = ACPI_PTR(geni_i2c_acpi_match),
682745 	},
683746 };
684747