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Sun, 02 Aug 2020 22:18:57 -0800 Received: from mtkmbs05n1.mediatek.inc (172.21.101.15) by MTKMBS62DR.mediatek.inc (172.29.94.18) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Sun, 2 Aug 2020 23:17:11 -0700 Received: from mtkcas07.mediatek.inc (172.21.101.84) by mtkmbs05n1.mediatek.inc (172.21.101.15) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Mon, 3 Aug 2020 14:17:10 +0800 Received: from localhost.localdomain (10.17.3.153) by mtkcas07.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Mon, 3 Aug 2020 14:17:10 +0800 From: Crystal Guo To: , , Subject: [v2,4/6] reset-controller: ti: introduce a new reset handler Date: Mon, 3 Aug 2020 14:15:09 +0800 Message-ID: <20200803061511.29555-5-crystal.guo@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20200803061511.29555-1-crystal.guo@mediatek.com> References: <20200803061511.29555-1-crystal.guo@mediatek.com> MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200803_021906_637523_98E6C4CC X-CRM114-Status: GOOD ( 13.76 ) X-Spam-Score: -0.2 (/) X-Spam-Report: SpamAssassin version 3.4.4 on merlin.infradead.org summary: Content analysis details: (-0.2 points) pts rule name description ---- ---------------------- -------------------------------------------------- 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.0 SPF_PASS SPF: sender matches SPF record 0.0 MIME_BASE64_TEXT RAW: Message text disguised using base64 encoding -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain 0.0 UNPARSEABLE_RELAY Informational: message has unparseable relay lines X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Crystal Guo , yong.liang@mediatek.com, srv_heupstream@mediatek.com, seiya.wang@mediatek.com, linux-kernel@vger.kernel.org, fan.chen@mediatek.com, linux-mediatek@lists.infradead.org, yingjoe.chen@mediatek.com, stanley.chu@mediatek.com, linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org Add ti_syscon_reset() to integrate assert and deassert together. If some modules need do serialized assert and deassert operations to reset itself, reset_control_reset can be called for convenience. Change-Id: I9046992b115a46f3594de57fa89c6a2de9957d49 --- drivers/reset/reset-ti-syscon.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/drivers/reset/reset-ti-syscon.c b/drivers/reset/reset-ti-syscon.c index a2635c21db7f..1c74bcb9a6c3 100644 --- a/drivers/reset/reset-ti-syscon.c +++ b/drivers/reset/reset-ti-syscon.c @@ -56,6 +56,7 @@ struct ti_syscon_reset_data { struct regmap *regmap; struct ti_syscon_reset_control *controls; unsigned int nr_controls; + bool assert_deassert_together; }; #define to_ti_syscon_reset_data(rcdev) \ @@ -158,10 +159,24 @@ static int ti_syscon_reset_status(struct reset_controller_dev *rcdev, !(control->flags & STATUS_SET); } +static int ti_syscon_reset(struct reset_controller_dev *rcdev, + unsigned long id) +{ + struct ti_syscon_reset_data *data = to_ti_syscon_reset_data(rcdev); + + if (data->assert_deassert_together) { + ti_syscon_reset_assert(rcdev, id); + return ti_syscon_reset_deassert(rcdev, id); + } else { + return -ENOTSUPP; + } +} + static const struct reset_control_ops ti_syscon_reset_ops = { .assert = ti_syscon_reset_assert, .deassert = ti_syscon_reset_deassert, .status = ti_syscon_reset_status, + .reset = ti_syscon_reset, }; static int ti_syscon_reset_probe(struct platform_device *pdev) @@ -204,6 +219,11 @@ static int ti_syscon_reset_probe(struct platform_device *pdev) controls[i].flags = be32_to_cpup(list++); } + if (of_property_read_bool(np, "assert-deassert-together")) + data->assert_deassert_together = true; + else + data->assert_deassert_together = false; + data->rcdev.ops = &ti_syscon_reset_ops; data->rcdev.owner = THIS_MODULE; data->rcdev.of_node = np;