From patchwork Thu Nov 5 00:22:13 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Min Li X-Patchwork-Id: 1394650 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming-netdev@ozlabs.org Delivered-To: patchwork-incoming-netdev@ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=netdev-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=renesas.com Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4CRPYl4VLPz9sVD for ; Thu, 5 Nov 2020 11:30:19 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732730AbgKEAaK (ORCPT ); Wed, 4 Nov 2020 19:30:10 -0500 Received: from pbmsgap01.intersil.com ([192.157.179.201]:57792 "EHLO pbmsgap01.intersil.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732071AbgKEA3u (ORCPT ); Wed, 4 Nov 2020 19:29:50 -0500 Received: from pps.filterd (pbmsgap01.intersil.com [127.0.0.1]) by pbmsgap01.intersil.com (8.16.0.42/8.16.0.42) with SMTP id 0A50MdEW026637; Wed, 4 Nov 2020 19:22:39 -0500 Received: from pbmxdp01.intersil.corp (pbmxdp01.pb.intersil.com [132.158.200.222]) by pbmsgap01.intersil.com with ESMTP id 34h3f1a9md-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-SHA384 bits=256 verify=NOT); Wed, 04 Nov 2020 19:22:39 -0500 Received: from pbmxdp03.intersil.corp (132.158.200.224) by pbmxdp01.intersil.corp (132.158.200.222) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384_P384) id 15.1.1979.3; Wed, 4 Nov 2020 19:22:38 -0500 Received: from localhost (132.158.202.109) by pbmxdp03.intersil.corp (132.158.200.224) with Microsoft SMTP Server id 15.1.1979.3 via Frontend Transport; Wed, 4 Nov 2020 19:22:37 -0500 From: To: CC: , , Min Li Subject: [PATCH v3 net-next 1/3] ptp: idt82p33: add adjphase support Date: Wed, 4 Nov 2020 19:22:13 -0500 Message-ID: <1604535735-19180-1-git-send-email-min.li.xe@renesas.com> X-Mailer: git-send-email 2.7.4 X-TM-AS-MML: disable MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.312,18.0.737 definitions=2020-11-04_17:2020-11-04,2020-11-04 signatures=0 X-Proofpoint-Spam-Details: rule=junk_notspam policy=junk score=0 adultscore=0 mlxscore=0 mlxlogscore=999 suspectscore=4 spamscore=0 phishscore=0 malwarescore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2011050000 X-Proofpoint-Spam-Reason: mlx Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Min Li Add idt82p33_adjphase() to support PHC write phase mode. Changes since v1: -Fix broken build Changes since v2: -Fix trailing space Signed-off-by: Min Li Acked-by: Richard Cochran --- drivers/ptp/ptp_idt82p33.c | 222 ++++++++++++++++++++++++++++++++------------- drivers/ptp/ptp_idt82p33.h | 2 + 2 files changed, 162 insertions(+), 62 deletions(-) diff --git a/drivers/ptp/ptp_idt82p33.c b/drivers/ptp/ptp_idt82p33.c index 179f6c4..d52fa67 100644 --- a/drivers/ptp/ptp_idt82p33.c +++ b/drivers/ptp/ptp_idt82p33.c @@ -21,6 +21,7 @@ MODULE_DESCRIPTION("Driver for IDT 82p33xxx clock devices"); MODULE_AUTHOR("IDT support-1588 "); MODULE_VERSION("1.0"); MODULE_LICENSE("GPL"); +MODULE_FIRMWARE(FW_FILENAME); /* Module Parameters */ static u32 sync_tod_timeout = SYNC_TOD_TIMEOUT_SEC; @@ -129,8 +130,9 @@ static int idt82p33_page_offset(struct idt82p33 *idt82p33, unsigned char val) static int idt82p33_rdwr(struct idt82p33 *idt82p33, unsigned int regaddr, unsigned char *buf, unsigned int count, bool write) { - u8 offset, page; int err; + u8 page; + u8 offset; page = _PAGE(regaddr); offset = _OFFSET(regaddr); @@ -145,13 +147,13 @@ static int idt82p33_rdwr(struct idt82p33 *idt82p33, unsigned int regaddr, } static int idt82p33_read(struct idt82p33 *idt82p33, unsigned int regaddr, - unsigned char *buf, unsigned int count) + unsigned char *buf, unsigned int count) { return idt82p33_rdwr(idt82p33, regaddr, buf, count, false); } static int idt82p33_write(struct idt82p33 *idt82p33, unsigned int regaddr, - unsigned char *buf, unsigned int count) + unsigned char *buf, unsigned int count) { return idt82p33_rdwr(idt82p33, regaddr, buf, count, true); } @@ -448,8 +450,11 @@ static int idt82p33_measure_tod_write_overhead(struct idt82p33_channel *channel) err = idt82p33_measure_settime_gettime_gap_overhead(channel, &gap_ns); - if (err) + if (err) { + dev_err(&idt82p33->client->dev, + "Failed in %s with err %d!\n", __func__, err); return err; + } err = idt82p33_measure_one_byte_write_overhead(channel, &one_byte_write_ns); @@ -518,13 +523,10 @@ static int idt82p33_sync_tod(struct idt82p33_channel *channel, bool enable) u8 sync_cnfg; int err; - if (enable == channel->sync_tod_on) { - if (enable && sync_tod_timeout) { - mod_delayed_work(system_wq, &channel->sync_tod_work, - sync_tod_timeout * HZ); - } - return 0; - } + /* Turn it off after sync_tod_timeout seconds */ + if (enable && sync_tod_timeout) + ptp_schedule_worker(channel->ptp_clock, + sync_tod_timeout * HZ); err = idt82p33_read(idt82p33, channel->dpll_sync_cnfg, &sync_cnfg, sizeof(sync_cnfg)); @@ -541,20 +543,13 @@ static int idt82p33_sync_tod(struct idt82p33_channel *channel, bool enable) if (err) return err; - channel->sync_tod_on = enable; - - if (enable && sync_tod_timeout) { - mod_delayed_work(system_wq, &channel->sync_tod_work, - sync_tod_timeout * HZ); - } - return 0; } -static void idt82p33_sync_tod_work_handler(struct work_struct *work) +static long idt82p33_sync_tod_work_handler(struct ptp_clock_info *ptp) { struct idt82p33_channel *channel = - container_of(work, struct idt82p33_channel, sync_tod_work.work); + container_of(ptp, struct idt82p33_channel, caps); struct idt82p33 *idt82p33 = channel->idt82p33; mutex_lock(&idt82p33->reg_lock); @@ -562,35 +557,51 @@ static void idt82p33_sync_tod_work_handler(struct work_struct *work) (void)idt82p33_sync_tod(channel, false); mutex_unlock(&idt82p33->reg_lock); + + /* Return a negative value here to not reschedule */ + return -1; } -static int idt82p33_pps_enable(struct idt82p33_channel *channel, bool enable) +static int idt82p33_output_enable(struct idt82p33_channel *channel, + bool enable, unsigned int outn) { struct idt82p33 *idt82p33 = channel->idt82p33; - u8 mask, outn, val; int err; + u8 val; + + err = idt82p33_read(idt82p33, OUT_MUX_CNFG(outn), &val, sizeof(val)); + + if (err) + return err; + + if (enable) + val &= ~SQUELCH_ENABLE; + else + val |= SQUELCH_ENABLE; + + return idt82p33_write(idt82p33, OUT_MUX_CNFG(outn), &val, sizeof(val)); +} + +static int idt82p33_output_mask_enable(struct idt82p33_channel *channel, + bool enable) +{ + u16 mask; + int err; + u8 outn; mask = channel->output_mask; outn = 0; while (mask) { - if (mask & 0x1) { - err = idt82p33_read(idt82p33, OUT_MUX_CNFG(outn), - &val, sizeof(val)); - if (err) - return err; - if (enable) - val &= ~SQUELCH_ENABLE; - else - val |= SQUELCH_ENABLE; + if (mask & 0x1) { - err = idt82p33_write(idt82p33, OUT_MUX_CNFG(outn), - &val, sizeof(val)); + err = idt82p33_output_enable(channel, enable, outn); if (err) return err; } + mask >>= 0x1; outn++; } @@ -598,6 +609,20 @@ static int idt82p33_pps_enable(struct idt82p33_channel *channel, bool enable) return 0; } +static int idt82p33_perout_enable(struct idt82p33_channel *channel, + bool enable, + struct ptp_perout_request *perout) +{ + unsigned int flags = perout->flags; + + /* Enable/disable output based on output_mask */ + if (flags == PEROUT_ENABLE_OUTPUT_MASK) + return idt82p33_output_mask_enable(channel, enable); + + /* Enable/disable individual output instead */ + return idt82p33_output_enable(channel, enable, perout->index); +} + static int idt82p33_enable_tod(struct idt82p33_channel *channel) { struct idt82p33 *idt82p33 = channel->idt82p33; @@ -611,15 +636,13 @@ static int idt82p33_enable_tod(struct idt82p33_channel *channel) if (err) return err; - err = idt82p33_pps_enable(channel, false); - - if (err) - return err; - err = idt82p33_measure_tod_write_overhead(channel); - if (err) + if (err) { + dev_err(&idt82p33->client->dev, + "Failed in %s with err %d!\n", __func__, err); return err; + } err = _idt82p33_settime(channel, &ts); @@ -638,10 +661,8 @@ static void idt82p33_ptp_clock_unregister_all(struct idt82p33 *idt82p33) channel = &idt82p33->channel[i]; - if (channel->ptp_clock) { + if (channel->ptp_clock) ptp_clock_unregister(channel->ptp_clock); - cancel_delayed_work_sync(&channel->sync_tod_work); - } } } @@ -659,14 +680,16 @@ static int idt82p33_enable(struct ptp_clock_info *ptp, if (rq->type == PTP_CLK_REQ_PEROUT) { if (!on) - err = idt82p33_pps_enable(channel, false); + err = idt82p33_perout_enable(channel, false, + &rq->perout); /* Only accept a 1-PPS aligned to the second. */ else if (rq->perout.start.nsec || rq->perout.period.sec != 1 || rq->perout.period.nsec) { err = -ERANGE; } else - err = idt82p33_pps_enable(channel, true); + err = idt82p33_perout_enable(channel, true, + &rq->perout); } mutex_unlock(&idt82p33->reg_lock); @@ -674,6 +697,49 @@ static int idt82p33_enable(struct ptp_clock_info *ptp, return err; } +static int idt82p33_adjwritephase(struct ptp_clock_info *ptp, s32 offsetNs) +{ + struct idt82p33_channel *channel = + container_of(ptp, struct idt82p33_channel, caps); + struct idt82p33 *idt82p33 = channel->idt82p33; + s64 offsetInFs; + s64 offsetRegVal; + u8 val[4] = {0}; + int err; + + offsetInFs = (s64)(-offsetNs) * 1000000; + + if (offsetInFs > WRITE_PHASE_OFFSET_LIMIT) + offsetInFs = WRITE_PHASE_OFFSET_LIMIT; + else if (offsetInFs < -WRITE_PHASE_OFFSET_LIMIT) + offsetInFs = -WRITE_PHASE_OFFSET_LIMIT; + + /* Convert from phaseOffsetInFs to register value */ + offsetRegVal = div_s64(offsetInFs * 1000, IDT_T0DPLL_PHASE_RESOL); + + val[0] = offsetRegVal & 0xFF; + val[1] = (offsetRegVal >> 8) & 0xFF; + val[2] = (offsetRegVal >> 16) & 0xFF; + val[3] = (offsetRegVal >> 24) & 0x1F; + val[3] |= PH_OFFSET_EN; + + mutex_lock(&idt82p33->reg_lock); + + err = idt82p33_dpll_set_mode(channel, PLL_MODE_WPH); + if (err) { + dev_err(&idt82p33->client->dev, + "Failed in %s with err %d!\n", __func__, err); + goto out; + } + + err = idt82p33_write(idt82p33, channel->dpll_phase_cnfg, val, + sizeof(val)); + +out: + mutex_unlock(&idt82p33->reg_lock); + return err; +} + static int idt82p33_adjfine(struct ptp_clock_info *ptp, long scaled_ppm) { struct idt82p33_channel *channel = @@ -683,6 +749,9 @@ static int idt82p33_adjfine(struct ptp_clock_info *ptp, long scaled_ppm) mutex_lock(&idt82p33->reg_lock); err = _idt82p33_adjfine(channel, scaled_ppm); + if (err) + dev_err(&idt82p33->client->dev, + "Failed in %s with err %d!\n", __func__, err); mutex_unlock(&idt82p33->reg_lock); return err; @@ -706,10 +775,15 @@ static int idt82p33_adjtime(struct ptp_clock_info *ptp, s64 delta_ns) if (err) { mutex_unlock(&idt82p33->reg_lock); + dev_err(&idt82p33->client->dev, + "Adjtime failed in %s with err %d!\n", __func__, err); return err; } err = idt82p33_sync_tod(channel, true); + if (err) + dev_err(&idt82p33->client->dev, + "Sync_tod failed in %s with err %d!\n", __func__, err); mutex_unlock(&idt82p33->reg_lock); @@ -725,6 +799,9 @@ static int idt82p33_gettime(struct ptp_clock_info *ptp, struct timespec64 *ts) mutex_lock(&idt82p33->reg_lock); err = _idt82p33_gettime(channel, ts); + if (err) + dev_err(&idt82p33->client->dev, + "Failed in %s with err %d!\n", __func__, err); mutex_unlock(&idt82p33->reg_lock); return err; @@ -740,6 +817,9 @@ static int idt82p33_settime(struct ptp_clock_info *ptp, mutex_lock(&idt82p33->reg_lock); err = _idt82p33_settime(channel, ts); + if (err) + dev_err(&idt82p33->client->dev, + "Failed in %s with err %d!\n", __func__, err); mutex_unlock(&idt82p33->reg_lock); return err; @@ -772,9 +852,6 @@ static int idt82p33_channel_init(struct idt82p33_channel *channel, int index) return -EINVAL; } - INIT_DELAYED_WORK(&channel->sync_tod_work, - idt82p33_sync_tod_work_handler); - channel->sync_tod_on = false; channel->current_freq_ppb = 0; return 0; @@ -784,11 +861,14 @@ static void idt82p33_caps_init(struct ptp_clock_info *caps) { caps->owner = THIS_MODULE; caps->max_adj = 92000; + caps->n_per_out = 11; + caps->adjphase = idt82p33_adjwritephase; caps->adjfine = idt82p33_adjfine; caps->adjtime = idt82p33_adjtime; caps->gettime64 = idt82p33_gettime; caps->settime64 = idt82p33_settime; caps->enable = idt82p33_enable; + caps->do_aux_work = idt82p33_sync_tod_work_handler; } static int idt82p33_enable_channel(struct idt82p33 *idt82p33, u32 index) @@ -802,23 +882,18 @@ static int idt82p33_enable_channel(struct idt82p33 *idt82p33, u32 index) channel = &idt82p33->channel[index]; err = idt82p33_channel_init(channel, index); - if (err) + if (err) { + dev_err(&idt82p33->client->dev, + "Channel_init failed in %s with err %d!\n", + __func__, err); return err; + } channel->idt82p33 = idt82p33; idt82p33_caps_init(&channel->caps); snprintf(channel->caps.name, sizeof(channel->caps.name), "IDT 82P33 PLL%u", index); - channel->caps.n_per_out = hweight8(channel->output_mask); - - err = idt82p33_dpll_set_mode(channel, PLL_MODE_DCO); - if (err) - return err; - - err = idt82p33_enable_tod(channel); - if (err) - return err; channel->ptp_clock = ptp_clock_register(&channel->caps, NULL); @@ -831,6 +906,22 @@ static int idt82p33_enable_channel(struct idt82p33 *idt82p33, u32 index) if (!channel->ptp_clock) return -ENOTSUPP; + err = idt82p33_dpll_set_mode(channel, PLL_MODE_DCO); + if (err) { + dev_err(&idt82p33->client->dev, + "Dpll_set_mode failed in %s with err %d!\n", + __func__, err); + return err; + } + + err = idt82p33_enable_tod(channel); + if (err) { + dev_err(&idt82p33->client->dev, + "Enable_tod failed in %s with err %d!\n", + __func__, err); + return err; + } + dev_info(&idt82p33->client->dev, "PLL%d registered as ptp%d\n", index, channel->ptp_clock->index); @@ -839,19 +930,22 @@ static int idt82p33_enable_channel(struct idt82p33 *idt82p33, u32 index) static int idt82p33_load_firmware(struct idt82p33 *idt82p33) { + char fname[128] = FW_FILENAME; const struct firmware *fw; struct idt82p33_fwrc *rec; u8 loaddr, page, val; int err; s32 len; - dev_dbg(&idt82p33->client->dev, - "requesting firmware '%s'\n", FW_FILENAME); + dev_dbg(&idt82p33->client->dev, "requesting firmware '%s'\n", fname); - err = request_firmware(&fw, FW_FILENAME, &idt82p33->client->dev); + err = request_firmware(&fw, fname, &idt82p33->client->dev); - if (err) + if (err) { + dev_err(&idt82p33->client->dev, + "Failed in %s with err %d!\n", __func__, err); return err; + } dev_dbg(&idt82p33->client->dev, "firmware size %zu bytes\n", fw->size); @@ -935,8 +1029,12 @@ static int idt82p33_probe(struct i2c_client *client, for (i = 0; i < MAX_PHC_PLL; i++) { if (idt82p33->pll_mask & (1 << i)) { err = idt82p33_enable_channel(idt82p33, i); - if (err) + if (err) { + dev_err(&idt82p33->client->dev, + "Failed in %s with err %d!\n", + __func__, err); break; + } } } } else { diff --git a/drivers/ptp/ptp_idt82p33.h b/drivers/ptp/ptp_idt82p33.h index 9d46966..3a0e001 100644 --- a/drivers/ptp/ptp_idt82p33.h +++ b/drivers/ptp/ptp_idt82p33.h @@ -56,6 +56,8 @@ #define PLL_MODE_SHIFT (0) #define PLL_MODE_MASK (0x1F) +#define PEROUT_ENABLE_OUTPUT_MASK (0xdeadbeef) + enum pll_mode { PLL_MODE_MIN = 0, PLL_MODE_AUTOMATIC = PLL_MODE_MIN, From patchwork Thu Nov 5 00:22:14 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Min Li X-Patchwork-Id: 1394645 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming-netdev@ozlabs.org Delivered-To: patchwork-incoming-netdev@ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=netdev-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=renesas.com Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4CRPWY2nL9z9sVD for ; Thu, 5 Nov 2020 11:28:25 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731645AbgKEA2U (ORCPT ); Wed, 4 Nov 2020 19:28:20 -0500 Received: from pbmsgap02.intersil.com ([192.157.179.202]:37596 "EHLO pbmsgap02.intersil.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729682AbgKEA1v (ORCPT ); Wed, 4 Nov 2020 19:27:51 -0500 X-Greylist: delayed 310 seconds by postgrey-1.27 at vger.kernel.org; Wed, 04 Nov 2020 19:27:51 EST Received: from pps.filterd (pbmsgap02.intersil.com [127.0.0.1]) by pbmsgap02.intersil.com (8.16.0.42/8.16.0.42) with SMTP id 0A50MfH4021545; Wed, 4 Nov 2020 19:22:41 -0500 Received: from pbmxdp03.intersil.corp (pbmxdp03.pb.intersil.com [132.158.200.224]) by pbmsgap02.intersil.com with ESMTP id 34h23fa6ck-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-SHA384 bits=256 verify=NOT); Wed, 04 Nov 2020 19:22:41 -0500 Received: from pbmxdp02.intersil.corp (132.158.200.223) by pbmxdp03.intersil.corp (132.158.200.224) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384_P384) id 15.1.1979.3; Wed, 4 Nov 2020 19:22:39 -0500 Received: from localhost (132.158.202.109) by pbmxdp02.intersil.corp (132.158.200.223) with Microsoft SMTP Server id 15.1.1979.3 via Frontend Transport; Wed, 4 Nov 2020 19:22:39 -0500 From: To: CC: , , Min Li Subject: [PATCH v3 net-next 2/3] ptp: idt82p33: use i2c_master_send for bus write Date: Wed, 4 Nov 2020 19:22:14 -0500 Message-ID: <1604535735-19180-2-git-send-email-min.li.xe@renesas.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1604535735-19180-1-git-send-email-min.li.xe@renesas.com> References: <1604535735-19180-1-git-send-email-min.li.xe@renesas.com> X-TM-AS-MML: disable MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.312,18.0.737 definitions=2020-11-04_17:2020-11-04,2020-11-04 signatures=0 X-Proofpoint-Spam-Details: rule=junk_notspam policy=junk score=0 mlxscore=0 adultscore=0 malwarescore=0 bulkscore=0 spamscore=0 mlxlogscore=999 phishscore=0 suspectscore=4 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2011050000 X-Proofpoint-Spam-Reason: mlx Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Min Li Refactor idt82p33_xfer and use i2c_master_send for write operation. Because some I2C controllers are only working with single-burst write transaction. Changes since v1: - Fix broken build. Signed-off-by: Min Li Acked-by: Richard Cochran --- drivers/ptp/ptp_idt82p33.c | 50 ++++++++++++++++++++++++++++++++++------------ drivers/ptp/ptp_idt82p33.h | 1 + 2 files changed, 38 insertions(+), 13 deletions(-) diff --git a/drivers/ptp/ptp_idt82p33.c b/drivers/ptp/ptp_idt82p33.c index d52fa67..b1528a0 100644 --- a/drivers/ptp/ptp_idt82p33.c +++ b/drivers/ptp/ptp_idt82p33.c @@ -78,11 +78,10 @@ static void idt82p33_timespec_to_byte_array(struct timespec64 const *ts, } } -static int idt82p33_xfer(struct idt82p33 *idt82p33, - unsigned char regaddr, - unsigned char *buf, - unsigned int count, - int write) +static int idt82p33_xfer_read(struct idt82p33 *idt82p33, + unsigned char regaddr, + unsigned char *buf, + unsigned int count) { struct i2c_client *client = idt82p33->client; struct i2c_msg msg[2]; @@ -94,7 +93,7 @@ static int idt82p33_xfer(struct idt82p33 *idt82p33, msg[0].buf = ®addr; msg[1].addr = client->addr; - msg[1].flags = write ? 0 : I2C_M_RD; + msg[1].flags = I2C_M_RD; msg[1].len = count; msg[1].buf = buf; @@ -110,6 +109,31 @@ static int idt82p33_xfer(struct idt82p33 *idt82p33, return 0; } +static int idt82p33_xfer_write(struct idt82p33 *idt82p33, + u8 regaddr, + u8 *buf, + u16 count) +{ + struct i2c_client *client = idt82p33->client; + /* we add 1 byte for device register */ + u8 msg[IDT82P33_MAX_WRITE_COUNT + 1]; + int err; + + if (count > IDT82P33_MAX_WRITE_COUNT) + return -EINVAL; + + msg[0] = regaddr; + memcpy(&msg[1], buf, count); + + err = i2c_master_send(client, msg, count + 1); + if (err < 0) { + dev_err(&client->dev, "i2c_master_send returned %d\n", err); + return err; + } + + return 0; +} + static int idt82p33_page_offset(struct idt82p33 *idt82p33, unsigned char val) { int err; @@ -117,7 +141,7 @@ static int idt82p33_page_offset(struct idt82p33 *idt82p33, unsigned char val) if (idt82p33->page_offset == val) return 0; - err = idt82p33_xfer(idt82p33, PAGE_ADDR, &val, sizeof(val), 1); + err = idt82p33_xfer_write(idt82p33, PAGE_ADDR, &val, sizeof(val)); if (err) dev_err(&idt82p33->client->dev, "failed to set page offset %d\n", val); @@ -130,20 +154,20 @@ static int idt82p33_page_offset(struct idt82p33 *idt82p33, unsigned char val) static int idt82p33_rdwr(struct idt82p33 *idt82p33, unsigned int regaddr, unsigned char *buf, unsigned int count, bool write) { + u8 offset, page; int err; - u8 page; - u8 offset; page = _PAGE(regaddr); offset = _OFFSET(regaddr); err = idt82p33_page_offset(idt82p33, page); if (err) - goto out; + return err; - err = idt82p33_xfer(idt82p33, offset, buf, count, write); -out: - return err; + if (write) + return idt82p33_xfer_write(idt82p33, offset, buf, count); + + return idt82p33_xfer_read(idt82p33, offset, buf, count); } static int idt82p33_read(struct idt82p33 *idt82p33, unsigned int regaddr, diff --git a/drivers/ptp/ptp_idt82p33.h b/drivers/ptp/ptp_idt82p33.h index 3a0e001..1c7a0f0 100644 --- a/drivers/ptp/ptp_idt82p33.h +++ b/drivers/ptp/ptp_idt82p33.h @@ -95,6 +95,7 @@ enum hw_tod_trig_sel { #define MAX_MEASURMENT_COUNT (5) #define SNAP_THRESHOLD_NS (150000) #define SYNC_TOD_TIMEOUT_SEC (5) +#define IDT82P33_MAX_WRITE_COUNT (512) #define PLLMASK_ADDR_HI 0xFF #define PLLMASK_ADDR_LO 0xA5 From patchwork Thu Nov 5 00:22:15 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Min Li X-Patchwork-Id: 1394651 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming-netdev@ozlabs.org Delivered-To: patchwork-incoming-netdev@ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=netdev-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=renesas.com Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4CRPfg1K3nz9sVN for ; Thu, 5 Nov 2020 11:34:35 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732232AbgKEAec (ORCPT ); Wed, 4 Nov 2020 19:34:32 -0500 Received: from pbmsgap01.intersil.com ([192.157.179.201]:58278 "EHLO pbmsgap01.intersil.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726608AbgKEAeb (ORCPT ); Wed, 4 Nov 2020 19:34:31 -0500 Received: from pps.filterd (pbmsgap01.intersil.com [127.0.0.1]) by pbmsgap01.intersil.com (8.16.0.42/8.16.0.42) with SMTP id 0A50MdEX026637; Wed, 4 Nov 2020 19:22:42 -0500 Received: from pbmxdp01.intersil.corp (pbmxdp01.pb.intersil.com [132.158.200.222]) by pbmsgap01.intersil.com with ESMTP id 34h3f1a9me-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-SHA384 bits=256 verify=NOT); Wed, 04 Nov 2020 19:22:42 -0500 Received: from pbmxdp03.intersil.corp (132.158.200.224) by pbmxdp01.intersil.corp (132.158.200.222) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384_P384) id 15.1.1979.3; Wed, 4 Nov 2020 19:22:41 -0500 Received: from localhost (132.158.202.109) by pbmxdp03.intersil.corp (132.158.200.224) with Microsoft SMTP Server id 15.1.1979.3 via Frontend Transport; Wed, 4 Nov 2020 19:22:41 -0500 From: To: CC: , , Min Li Subject: [PATCH v3 net-next 3/3] ptp: idt82p33: optimize _idt82p33_adjfine Date: Wed, 4 Nov 2020 19:22:15 -0500 Message-ID: <1604535735-19180-3-git-send-email-min.li.xe@renesas.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1604535735-19180-1-git-send-email-min.li.xe@renesas.com> References: <1604535735-19180-1-git-send-email-min.li.xe@renesas.com> X-TM-AS-MML: disable MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.312,18.0.737 definitions=2020-11-04_17:2020-11-04,2020-11-04 signatures=0 X-Proofpoint-Spam-Details: rule=junk_notspam policy=junk score=0 adultscore=0 mlxscore=0 mlxlogscore=741 suspectscore=4 spamscore=0 phishscore=0 malwarescore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2011050000 X-Proofpoint-Spam-Reason: mlx Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Min Li Use div_s64 so that the neg_adj is not needed. Signed-off-by: Min Li Acked-by: Richard Cochran --- drivers/ptp/ptp_idt82p33.c | 10 +--------- 1 file changed, 1 insertion(+), 9 deletions(-) diff --git a/drivers/ptp/ptp_idt82p33.c b/drivers/ptp/ptp_idt82p33.c index b1528a0..e970379d 100644 --- a/drivers/ptp/ptp_idt82p33.c +++ b/drivers/ptp/ptp_idt82p33.c @@ -320,7 +320,6 @@ static int _idt82p33_adjfine(struct idt82p33_channel *channel, long scaled_ppm) { struct idt82p33 *idt82p33 = channel->idt82p33; unsigned char buf[5] = {0}; - int neg_adj = 0; int err, i; s64 fcw; @@ -340,16 +339,9 @@ static int _idt82p33_adjfine(struct idt82p33_channel *channel, long scaled_ppm) * FCW = ------------- * 168 * 2^4 */ - if (scaled_ppm < 0) { - neg_adj = 1; - scaled_ppm = -scaled_ppm; - } fcw = scaled_ppm * 244140625ULL; - fcw = div_u64(fcw, 2688); - - if (neg_adj) - fcw = -fcw; + fcw = div_s64(fcw, 2688); for (i = 0; i < 5; i++) { buf[i] = fcw & 0xff;