| tsens.c (082f20b21de20285da2cbfc1be29656f0714c1b8) | tsens.c (d012f9189fda0f3a1b303780ba0bbc7298d0d349) |
|---|---|
| 1// SPDX-License-Identifier: GPL-2.0 2/* 3 * Copyright (c) 2015, The Linux Foundation. All rights reserved. 4 * Copyright (c) 2019, 2020, Linaro Ltd. 5 */ 6 7#include <linux/debugfs.h> 8#include <linux/err.h> --- 589 unchanged lines hidden (view full) --- 598 struct tsens_priv *priv = s->priv; 599 int hw_id = s->hw_id; 600 u32 temp_idx = LAST_TEMP_0 + hw_id; 601 u32 valid_idx = VALID_0 + hw_id; 602 u32 valid; 603 int ret; 604 605 /* VER_0 doesn't have VALID bit */ | 1// SPDX-License-Identifier: GPL-2.0 2/* 3 * Copyright (c) 2015, The Linux Foundation. All rights reserved. 4 * Copyright (c) 2019, 2020, Linaro Ltd. 5 */ 6 7#include <linux/debugfs.h> 8#include <linux/err.h> --- 589 unchanged lines hidden (view full) --- 598 struct tsens_priv *priv = s->priv; 599 int hw_id = s->hw_id; 600 u32 temp_idx = LAST_TEMP_0 + hw_id; 601 u32 valid_idx = VALID_0 + hw_id; 602 u32 valid; 603 int ret; 604 605 /* VER_0 doesn't have VALID bit */ |
| 606 if (tsens_version(priv) >= VER_0_1) { 607 ret = regmap_field_read(priv->rf[valid_idx], &valid); 608 if (ret) 609 return ret; 610 while (!valid) { 611 /* Valid bit is 0 for 6 AHB clock cycles. 612 * At 19.2MHz, 1 AHB clock is ~60ns. 613 * We should enter this loop very, very rarely. 614 */ 615 ndelay(400); 616 ret = regmap_field_read(priv->rf[valid_idx], &valid); 617 if (ret) 618 return ret; 619 } 620 } | 606 if (tsens_version(priv) == VER_0) 607 goto get_temp; |
| 621 | 608 |
| 609 /* Valid bit is 0 for 6 AHB clock cycles. 610 * At 19.2MHz, 1 AHB clock is ~60ns. 611 * We should enter this loop very, very rarely. 612 * Wait 1 us since it's the min of poll_timeout macro. 613 * Old value was 400 ns. 614 */ 615 ret = regmap_field_read_poll_timeout(priv->rf[valid_idx], valid, 616 valid, 1, 20 * USEC_PER_MSEC); 617 if (ret) 618 return ret; 619 620get_temp: |
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| 622 /* Valid bit is set, OK to read the temperature */ 623 *temp = tsens_hw_to_mC(s, temp_idx); 624 625 return 0; 626} 627 628int get_temp_common(const struct tsens_sensor *s, int *temp) 629{ --- 560 unchanged lines hidden --- | 621 /* Valid bit is set, OK to read the temperature */ 622 *temp = tsens_hw_to_mC(s, temp_idx); 623 624 return 0; 625} 626 627int get_temp_common(const struct tsens_sensor *s, int *temp) 628{ --- 560 unchanged lines hidden --- |