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[2620:137:e000::1:20]) by mx.google.com with ESMTP id ot8-20020a170906ccc800b00992a9b11cf2si8188459ejb.787.2023.07.25.13.30.09; Tue, 25 Jul 2023 13:30:34 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@quicinc.com header.s=qcppdkim1 header.b=VvhV25iI; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=quicinc.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231712AbjGYTgn (ORCPT + 99 others); Tue, 25 Jul 2023 15:36:43 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35564 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231536AbjGYTgj (ORCPT ); Tue, 25 Jul 2023 15:36:39 -0400 Received: from mx0b-0031df01.pphosted.com (mx0b-0031df01.pphosted.com [205.220.180.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BAD4F2113; Tue, 25 Jul 2023 12:36:22 -0700 (PDT) Received: from pps.filterd (m0279870.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 36PFWV2A006590; Tue, 25 Jul 2023 19:36:12 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-transfer-encoding : content-type; s=qcppdkim1; bh=Rg3SV02AZwf+wvP5RwyYP+jBWI43q8TyCKnIPnHhM9E=; b=VvhV25iI0BkA7FtatC3t+Gq9LSllUAgyTOV1nlOr4bDO+o26q62VN9wVN6jNkY94yyAy K+yS5PXIMx+wEbbJtJUvwkxWzVwyHhKd2vNPhA98R/xQ9DR9nCJ+DJTidXGIvOeVm/oK Ykt3by5t+uI+kAVXzFt9OqGYjOwQ+abePVc0ELL4Y6wdGr2xezr6wobLhATTQfbBgpov sqVnw5XBirlQm6MT6KiOHLzqCVEhqMfADpU8z2NdzEH6Wg7O8V3rq6yCxQTFG2MuNiKv UPghrH94gmOv/V4obYsppz4wKrOHSD/gS9oXVas+ys8Sj0d6myCg3WtUro0FtoChUuxi rg== Received: from nalasppmta02.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3s29j5hra7-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 25 Jul 2023 19:36:11 +0000 Received: from nalasex01a.na.qualcomm.com (nalasex01a.na.qualcomm.com [10.47.209.196]) by NALASPPMTA02.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 36PJa7hM016906 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 25 Jul 2023 19:36:07 GMT Received: from hu-amelende-lv.qualcomm.com (10.49.16.6) by nalasex01a.na.qualcomm.com (10.47.209.196) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.30; Tue, 25 Jul 2023 12:36:06 -0700 From: Anjelique Melendez To: , , , , , , , CC: , , , , , , , , , Anjelique Melendez Subject: [PATCH v2 4/7] leds: rgb: leds-qcom-lpg: Add support for PPG through single SDAM Date: Tue, 25 Jul 2023 12:34:20 -0700 Message-ID: <20230725193423.25047-5-quic_amelende@quicinc.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230725193423.25047-1-quic_amelende@quicinc.com> References: <20230725193423.25047-1-quic_amelende@quicinc.com> MIME-Version: 1.0 X-Originating-IP: [10.49.16.6] X-ClientProxiedBy: nalasex01a.na.qualcomm.com (10.47.209.196) To nalasex01a.na.qualcomm.com (10.47.209.196) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-ORIG-GUID: LvK2rlORabMnsGO3I-ufhWzpIW-BXEiH X-Proofpoint-GUID: LvK2rlORabMnsGO3I-ufhWzpIW-BXEiH X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.254,Aquarius:18.0.957,Hydra:6.0.591,FMLib:17.11.176.26 definitions=2023-07-25_10,2023-07-25_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 suspectscore=0 adultscore=0 malwarescore=0 mlxlogscore=999 phishscore=0 clxscore=1015 mlxscore=0 bulkscore=0 lowpriorityscore=0 priorityscore=1501 impostorscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2306200000 definitions=main-2307250168 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_BLOCKED, SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1772425874305043183 X-GMAIL-MSGID: 1772425874305043183 In some PMICs like pmi632, the LUT pattern and LPG configuration can be stored in a single SDAM module instead of LUT peripheral. This feature is called PPG. Add support for configuring and using LUT pattern from SDAM. Signed-off-by: Anjelique Melendez --- drivers/leds/rgb/leds-qcom-lpg.c | 309 ++++++++++++++++++++++++++++--- 1 file changed, 283 insertions(+), 26 deletions(-) diff --git a/drivers/leds/rgb/leds-qcom-lpg.c b/drivers/leds/rgb/leds-qcom-lpg.c index 59581b3e25ca..6fdf736d3632 100644 --- a/drivers/leds/rgb/leds-qcom-lpg.c +++ b/drivers/leds/rgb/leds-qcom-lpg.c @@ -8,12 +8,14 @@ #include #include #include +#include #include #include #include #include #include #include +#include #define LPG_SUBTYPE_REG 0x05 #define LPG_SUBTYPE_LPG 0x2 @@ -49,9 +51,25 @@ #define LPG_RESOLUTION_9BIT BIT(9) #define LPG_RESOLUTION_15BIT BIT(15) +#define PPG_MAX_LED_BRIGHTNESS 255 + #define LPG_MAX_M 7 #define LPG_MAX_PREDIV 6 +#define DEFAULT_TICK_DURATION_US 7800 +#define RAMP_STEP_DURATION(x) (((x) * 1000 / DEFAULT_TICK_DURATION_US) & 0xff) + +/* LPG common config settings for PPG */ +#define SDAM_REG_RAMP_STEP_DURATION 0x47 +#define SDAM_LUT_COUNT_MAX 64 + +/* LPG per channel config settings for PPG */ +#define SDAM_LUT_EN_OFFSET 0x0 +#define SDAM_PATTERN_CONFIG_OFFSET 0x1 +#define SDAM_END_INDEX_OFFSET 0x3 +#define SDAM_START_INDEX_OFFSET 0x4 +#define SDAM_PBS_SCRATCH_LUT_COUNTER_OFFSET 0x6 + struct lpg_channel; struct lpg_data; @@ -65,7 +83,12 @@ struct lpg_data; * @lut_base: base address of the LUT block (optional) * @lut_size: number of entries in the LUT block * @lut_bitmap: allocation bitmap for LUT entries - * @triled_base: base address of the TRILED block (optional) + * @pbs_dev: PBS device + * @lpg_chan_nvmem: LPG nvmem peripheral device + * @pbs_en_bitmap: bitmap for tracking PBS triggers + * @lut_sdam_base: offset where LUT pattern begins in nvmem + * @ppg_en: Flag indicating whether PPG is enabled/used + * @triled_base: base address of the TRILED block (optional) * @triled_src: power-source for the TRILED * @triled_has_atc_ctl: true if there is TRI_LED_ATC_CTL register * @triled_has_src_sel: true if there is TRI_LED_SRC_SEL register @@ -86,6 +109,12 @@ struct lpg { u32 lut_size; unsigned long *lut_bitmap; + struct pbs_dev *pbs_dev; + struct nvmem_device *lpg_chan_nvmem; + unsigned long pbs_en_bitmap; + u32 lut_sdam_base; + bool ppg_en; + u32 triled_base; u32 triled_src; bool triled_has_atc_ctl; @@ -102,6 +131,8 @@ struct lpg { * @triled_mask: mask in TRILED to enable this channel * @lut_mask: mask in LUT to start pattern generator for this channel * @subtype: PMIC hardware block subtype + * @sdam_offset: Channel offset in LPG nvmem + * @lpg_idx: index of the channel * @in_use: channel is exposed to LED framework * @color: color of the LED attached to this channel * @dtest_line: DTEST line for output, or 0 if disabled @@ -113,6 +144,7 @@ struct lpg { * @pre_div_sel: divider selector of the reference clock * @pre_div_exp: exponential divider of the reference clock * @pwm_resolution_sel: pwm resolution selector + * @pattern_set: true when setting pattern * @ramp_enabled: duty cycle is driven by iterating over lookup table * @ramp_ping_pong: reverse through pattern, rather than wrapping to start * @ramp_oneshot: perform only a single pass over the pattern @@ -130,6 +162,8 @@ struct lpg_channel { unsigned int triled_mask; unsigned int lut_mask; unsigned int subtype; + u32 sdam_offset; + u32 lpg_idx; bool in_use; @@ -147,6 +181,7 @@ struct lpg_channel { unsigned int pre_div_exp; unsigned int pwm_resolution_sel; + bool pattern_set; bool ramp_enabled; bool ramp_ping_pong; bool ramp_oneshot; @@ -181,10 +216,12 @@ struct lpg_led { * struct lpg_channel_data - per channel initialization data * @base: base address for PWM channel registers * @triled_mask: bitmask for controlling this channel in TRILED + * @sdam_offset: Channel offset in LPG nvmem */ struct lpg_channel_data { unsigned int base; u8 triled_mask; + unsigned int sdam_offset; }; /** @@ -192,21 +229,87 @@ struct lpg_channel_data { * @lut_base: base address of LUT block * @lut_size: number of entries in LUT * @triled_base: base address of TRILED + * @lut_sdam_base: base address where LUT pattern begins in nvmem device * @triled_has_atc_ctl: true if there is TRI_LED_ATC_CTL register * @triled_has_src_sel: true if there is TRI_LED_SRC_SEL register * @num_channels: number of channels in LPG + * @nvmem_count: number of nvmems used for LUT and PPG config * @channels: list of channel initialization data */ struct lpg_data { unsigned int lut_base; unsigned int lut_size; unsigned int triled_base; + unsigned int lut_sdam_base; bool triled_has_atc_ctl; bool triled_has_src_sel; int num_channels; + int nvmem_count; const struct lpg_channel_data *channels; }; +static int lpg_sdam_write(struct lpg *lpg, u16 addr, u8 val) +{ + int rc; + + rc = nvmem_device_write(lpg->lpg_chan_nvmem, addr, 1, &val); + if (rc < 0) + dev_err(lpg->dev, "writing %u to SDAM addr %#x failed, rc=%d\n", + val, addr, rc); + + return rc > 0 ? 0 : rc; +} + +#define SDAM_REG_PBS_SEQ_EN 0x42 +#define PBS_SW_TRIG_BIT BIT(0) + +static int lpg_clear_pbs_trigger(struct lpg_channel *chan) +{ + int rc; + + clear_bit(chan->lpg_idx, &chan->lpg->pbs_en_bitmap); + if (!chan->lpg->pbs_en_bitmap) { + rc = lpg_sdam_write(chan->lpg, SDAM_REG_PBS_SEQ_EN, 0); + if (rc < 0) + return rc; + } + + return 0; +} + +static int lpg_set_pbs_trigger(struct lpg_channel *chan) +{ + int rc; + + if (!chan->lpg->pbs_en_bitmap) { + rc = lpg_sdam_write(chan->lpg, SDAM_REG_PBS_SEQ_EN, PBS_SW_TRIG_BIT); + if (rc < 0) + return rc; + + rc = qcom_pbs_trigger_event(chan->lpg->pbs_dev, PBS_SW_TRIG_BIT); + if (rc < 0) + return rc; + } + set_bit(chan->lpg_idx, &chan->lpg->pbs_en_bitmap); + + return 0; +} + +static void lpg_sdam_configure_triggers(struct lpg_channel *chan) +{ + if (!chan->lpg->ppg_en) + return; + + if (chan->enabled && chan->pattern_set) { + lpg_sdam_write(chan->lpg, SDAM_LUT_EN_OFFSET + chan->sdam_offset, 1); + lpg_set_pbs_trigger(chan); + chan->pattern_set = false; + } else { + lpg_sdam_write(chan->lpg, SDAM_LUT_EN_OFFSET + chan->sdam_offset, 0); + lpg_clear_pbs_trigger(chan); + } +} + static int triled_set(struct lpg *lpg, unsigned int mask, unsigned int enable) { /* Skip if we don't have a triled block */ @@ -217,6 +320,41 @@ static int triled_set(struct lpg *lpg, unsigned int mask, unsigned int enable) mask, enable); } +static int lpg_lut_store_sdam(struct lpg *lpg, struct led_pattern *pattern, + size_t len, unsigned int *lo_idx, unsigned int *hi_idx) +{ + u8 brightness; + u16 addr; + unsigned int idx; + int i, rc; + + if (len > SDAM_LUT_COUNT_MAX) { + dev_err(lpg->dev, "Pattern length (%zu) exceeds maximum pattern length (%d)\n", + len, SDAM_LUT_COUNT_MAX); + return -EINVAL; + } + + idx = bitmap_find_next_zero_area(lpg->lut_bitmap, lpg->lut_size, + 0, len, 0); + if (idx >= lpg->lut_size) + return -ENOSPC; + + for (i = 0; i < len; i++) { + brightness = pattern[i].brightness; + addr = lpg->lut_sdam_base + i + idx; + rc = lpg_sdam_write(lpg, addr, brightness); + if (rc < 0) + return rc; + } + + bitmap_set(lpg->lut_bitmap, idx, len); + + *lo_idx = idx; + *hi_idx = idx + len - 1; + + return 0; +} + static int lpg_lut_store(struct lpg *lpg, struct led_pattern *pattern, size_t len, unsigned int *lo_idx, unsigned int *hi_idx) { @@ -463,6 +601,26 @@ static void lpg_apply_pwm_value(struct lpg_channel *chan) #define LPG_PATTERN_CONFIG_PAUSE_HI BIT(1) #define LPG_PATTERN_CONFIG_PAUSE_LO BIT(0) +static void lpg_sdam_apply_lut_control(struct lpg_channel *chan) +{ + u8 val, conf = 0; + struct lpg *lpg = chan->lpg; + + if (!chan->ramp_oneshot) + conf |= LPG_PATTERN_CONFIG_REPEAT; + + lpg_sdam_write(lpg, SDAM_PBS_SCRATCH_LUT_COUNTER_OFFSET + chan->sdam_offset, 0); + lpg_sdam_write(lpg, SDAM_PATTERN_CONFIG_OFFSET + chan->sdam_offset, conf); + + lpg_sdam_write(lpg, SDAM_END_INDEX_OFFSET + chan->sdam_offset, chan->pattern_hi_idx); + lpg_sdam_write(lpg, SDAM_START_INDEX_OFFSET + chan->sdam_offset, chan->pattern_lo_idx); + + val = RAMP_STEP_DURATION(chan->ramp_tick_ms); + if (val > 0) + val--; + lpg_sdam_write(lpg, SDAM_REG_RAMP_STEP_DURATION, val); +} + static void lpg_apply_lut_control(struct lpg_channel *chan) { struct lpg *lpg = chan->lpg; @@ -476,6 +634,9 @@ static void lpg_apply_lut_control(struct lpg_channel *chan) if (!chan->ramp_enabled || chan->pattern_lo_idx == chan->pattern_hi_idx) return; + if (lpg->ppg_en) + return lpg_sdam_apply_lut_control(chan); + hi_pause = DIV_ROUND_UP(chan->ramp_hi_pause_ms, step); lo_pause = DIV_ROUND_UP(chan->ramp_lo_pause_ms, step); @@ -632,7 +793,7 @@ static void lpg_brightness_set(struct lpg_led *led, struct led_classdev *cdev, } else { lpg_calc_freq(chan, NSEC_PER_MSEC); - duty = div_u64(brightness * chan->period, cdev->max_brightness); + duty = div_u64(brightness * chan->period, LPG_RESOLUTION_9BIT); lpg_calc_duty(chan, duty); chan->enabled = true; chan->ramp_enabled = false; @@ -643,6 +804,7 @@ static void lpg_brightness_set(struct lpg_led *led, struct led_classdev *cdev, triled_mask |= chan->triled_mask; lpg_apply(chan); + lpg_sdam_configure_triggers(chan); } /* Toggle triled lines */ @@ -775,7 +937,7 @@ static int lpg_pattern_set(struct lpg_led *led, struct led_pattern *led_pattern, unsigned int lo_idx; unsigned int hi_idx; unsigned int i; - bool ping_pong = true; + bool ping_pong = false; int ret = -EINVAL; /* Hardware only support oneshot or indefinite loops */ @@ -824,7 +986,7 @@ static int lpg_pattern_set(struct lpg_led *led, struct led_pattern *led_pattern, * used to stretch the first delay of the pattern and a "high pause" * the last one. * - * In order to save space the pattern can be played in "ping pong" + * In order to save space for the pattern can be played in "ping pong" * mode, in which the pattern is first played forward, then "high * pause" is applied, then the pattern is played backwards and finally * the "low pause" is applied. @@ -837,16 +999,22 @@ static int lpg_pattern_set(struct lpg_led *led, struct led_pattern *led_pattern, * If the specified pattern is a palindrome the ping pong mode is * enabled. In this scenario the delta_t of the middle entry (i.e. the * last in the programmed pattern) determines the "high pause". + * + * NVMEM devices supporting LUT do not support "low pause", "high pause" + * or "ping pong" */ /* Detect palindromes and use "ping pong" to reduce LUT usage */ - for (i = 0; i < len / 2; i++) { - brightness_a = pattern[i].brightness; - brightness_b = pattern[len - i - 1].brightness; - - if (brightness_a != brightness_b) { - ping_pong = false; - break; + if (lpg->lut_base) { + ping_pong = true; + for (i = 0; i < len / 2; i++) { + brightness_a = pattern[i].brightness; + brightness_b = pattern[len - i - 1].brightness; + + if (brightness_a != brightness_b) { + ping_pong = false; + break; + } } } @@ -860,14 +1028,21 @@ static int lpg_pattern_set(struct lpg_led *led, struct led_pattern *led_pattern, * Validate that all delta_t in the pattern are the same, with the * exception of the middle element in case of ping_pong. */ - delta_t = pattern[1].delta_t; - for (i = 2; i < len; i++) { + if (lpg->ppg_en) { + i = 1; + delta_t = pattern[0].delta_t; + } else { + i = 2; + delta_t = pattern[1].delta_t; + } + + for (; i < len; i++) { if (pattern[i].delta_t != delta_t) { /* * Allow last entry in the full or shortened pattern to * specify hi pause. Reject other variations. */ - if (i != actual_len - 1) + if (i != actual_len - 1 || lpg->ppg_en) goto out_free_pattern; } } @@ -876,12 +1051,19 @@ static int lpg_pattern_set(struct lpg_led *led, struct led_pattern *led_pattern, if (delta_t >= BIT(9)) goto out_free_pattern; - /* Find "low pause" and "high pause" in the pattern */ - lo_pause = pattern[0].delta_t; - hi_pause = pattern[actual_len - 1].delta_t; + /* Find "low pause" and "high pause" in the pattern if not an NVMEM device*/ + if (!lpg->ppg_en) { + lo_pause = pattern[0].delta_t; + hi_pause = pattern[actual_len - 1].delta_t; + } mutex_lock(&lpg->lock); - ret = lpg_lut_store(lpg, pattern, actual_len, &lo_idx, &hi_idx); + + if (lpg->ppg_en) + ret = lpg_lut_store_sdam(lpg, pattern, actual_len, &lo_idx, &hi_idx); + else + ret = lpg_lut_store(lpg, pattern, actual_len, &lo_idx, &hi_idx); + if (ret < 0) goto out_unlock; @@ -897,6 +1079,8 @@ static int lpg_pattern_set(struct lpg_led *led, struct led_pattern *led_pattern, chan->pattern_lo_idx = lo_idx; chan->pattern_hi_idx = hi_idx; + + chan->pattern_set = lpg->ppg_en; } out_unlock: @@ -1190,8 +1374,8 @@ static int lpg_add_led(struct lpg *lpg, struct device_node *np) cdev->brightness_set_blocking = lpg_brightness_mc_set; cdev->blink_set = lpg_blink_mc_set; - /* Register pattern accessors only if we have a LUT block */ - if (lpg->lut_base) { + /* Register pattern accessors if we have a LUT block or when using PPG */ + if (lpg->lut_base || lpg->ppg_en) { cdev->pattern_set = lpg_pattern_mc_set; cdev->pattern_clear = lpg_pattern_mc_clear; } @@ -1204,15 +1388,19 @@ static int lpg_add_led(struct lpg *lpg, struct device_node *np) cdev->brightness_set_blocking = lpg_brightness_single_set; cdev->blink_set = lpg_blink_single_set; - /* Register pattern accessors only if we have a LUT block */ - if (lpg->lut_base) { + /* Register pattern accessors if we have a LUT block or when using PPG */ + if (lpg->lut_base || lpg->ppg_en) { cdev->pattern_set = lpg_pattern_single_set; cdev->pattern_clear = lpg_pattern_single_clear; } } cdev->default_trigger = of_get_property(np, "linux,default-trigger", NULL); - cdev->max_brightness = LPG_RESOLUTION_9BIT - 1; + + if (lpg->ppg_en) + cdev->max_brightness = PPG_MAX_LED_BRIGHTNESS; + else + cdev->max_brightness = LPG_RESOLUTION_9BIT - 1; if (!of_property_read_string(np, "default-state", &state) && !strcmp(state, "on")) @@ -1253,6 +1441,8 @@ static int lpg_init_channels(struct lpg *lpg) chan->base = data->channels[i].base; chan->triled_mask = data->channels[i].triled_mask; chan->lut_mask = BIT(i); + chan->sdam_offset = data->channels[i].sdam_offset; + chan->lpg_idx = i; regmap_read(lpg->map, chan->base + LPG_SUBTYPE_REG, &chan->subtype); } @@ -1299,10 +1489,13 @@ static int lpg_init_lut(struct lpg *lpg) { const struct lpg_data *data = lpg->data; - if (!data->lut_base) + if (data->lut_base) + lpg->lut_base = data->lut_base; + else if (lpg->ppg_en) + lpg->lut_sdam_base = data->lut_sdam_base; + else return 0; - lpg->lut_base = data->lut_base; lpg->lut_size = data->lut_size; lpg->lut_bitmap = devm_bitmap_zalloc(lpg->dev, lpg->lut_size, GFP_KERNEL); @@ -1312,6 +1505,60 @@ static int lpg_init_lut(struct lpg *lpg) return 0; } +static int lpg_parse_sdam(struct lpg *lpg) +{ + int rc = 0; + + if (lpg->data->nvmem_count == 0) + return 0; + + /* get the nvmem device for LPG/LUT config */ + lpg->lpg_chan_nvmem = devm_nvmem_device_get(lpg->dev, "lpg_chan_sdam"); + if (IS_ERR(lpg->lpg_chan_nvmem)) { + rc = PTR_ERR(lpg->lpg_chan_nvmem); + if (rc != -EPROBE_DEFER) + dev_err(lpg->dev, "Failed to get nvmem device, rc=%d\n", rc); + return rc; + } + + lpg->pbs_dev = get_pbs_client_device(lpg->dev); + if (IS_ERR(lpg->pbs_dev)) { + rc = PTR_ERR(lpg->pbs_dev); + if (rc != -EPROBE_DEFER) + dev_err(lpg->dev, "Failed to get PBS client device, rc=%d\n", rc); + return rc; + } + + lpg->ppg_en = true; + + return rc; +} + +static int lpg_init_sdam(struct lpg *lpg) +{ + struct lpg_channel *chan; + int i, rc; + + if (!lpg->ppg_en) + return 0; + + for (i = 0; i < lpg->num_channels; i++) { + chan = &lpg->channels[i]; + if (chan->sdam_offset) { + rc = lpg_sdam_write(lpg, SDAM_LUT_EN_OFFSET + chan->sdam_offset, 0); + if (rc < 0) + break; + + rc = lpg_sdam_write(lpg, + SDAM_PBS_SCRATCH_LUT_COUNTER_OFFSET + chan->sdam_offset, 0); + if (rc < 0) + break; + } + } + + return rc; +} + static int lpg_probe(struct platform_device *pdev) { struct device_node *np; @@ -1348,6 +1595,14 @@ static int lpg_probe(struct platform_device *pdev) if (ret < 0) return ret; + ret = lpg_parse_sdam(lpg); + if (ret < 0) + return ret; + + ret = lpg_init_sdam(lpg); + if (ret < 0) + return ret; + ret = lpg_init_lut(lpg); if (ret < 0) return ret; @@ -1363,7 +1618,9 @@ static int lpg_probe(struct platform_device *pdev) for (i = 0; i < lpg->num_channels; i++) lpg_apply_dtest(&lpg->channels[i]); - return lpg_add_pwm(lpg); + ret = lpg_add_pwm(lpg); + + return ret; } static int lpg_remove(struct platform_device *pdev)