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Sun, 02 Aug 2020 22:27:10 -0800 Received: from MTKMBS02N1.mediatek.inc (172.21.101.77) by MTKMBS62N2.mediatek.inc (172.29.193.42) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Sun, 2 Aug 2020 23:17:13 -0700 Received: from mtkcas07.mediatek.inc (172.21.101.84) by mtkmbs02n1.mediatek.inc (172.21.101.77) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Mon, 3 Aug 2020 14:17:11 +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 14:17:12 +0800 From: Crystal Guo To: , , Subject: [v2,5/6] reset-controller: ti: Introduce force-update method Date: Mon, 3 Aug 2020 14:15:10 +0800 Message-ID: <20200803061511.29555-6-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_022718_989179_07FE23D1 X-CRM114-Status: GOOD ( 13.01 ) 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 Introduce force-update method for assert and deassert interface, which force the write operation in case the read already happens to return the correct value. Signed-off-by: Crystal Guo Acked-by: Stanley Chu --- drivers/reset/reset-ti-syscon.c | 15 +++++++++++++-- 1 file changed, 13 insertions(+), 2 deletions(-) diff --git a/drivers/reset/reset-ti-syscon.c b/drivers/reset/reset-ti-syscon.c index 1c74bcb9a6c3..f4baf78afd14 100644 --- a/drivers/reset/reset-ti-syscon.c +++ b/drivers/reset/reset-ti-syscon.c @@ -57,6 +57,7 @@ struct ti_syscon_reset_data { struct ti_syscon_reset_control *controls; unsigned int nr_controls; bool assert_deassert_together; + bool update_force; }; #define to_ti_syscon_reset_data(rcdev) \ @@ -90,7 +91,10 @@ static int ti_syscon_reset_assert(struct reset_controller_dev *rcdev, mask = BIT(control->assert_bit); value = (control->flags & ASSERT_SET) ? mask : 0x0; - return regmap_update_bits(data->regmap, control->assert_offset, mask, value); + if (data->update_force) + return regmap_write_bits(data->regmap, control->assert_offset, mask, value); + else + return regmap_update_bits(data->regmap, control->assert_offset, mask, value); } /** @@ -121,7 +125,10 @@ static int ti_syscon_reset_deassert(struct reset_controller_dev *rcdev, mask = BIT(control->deassert_bit); value = (control->flags & DEASSERT_SET) ? mask : 0x0; - return regmap_update_bits(data->regmap, control->deassert_offset, mask, value); + if (data->update_force) + return regmap_write_bits(data->regmap, control->deassert_offset, mask, value); + else + return regmap_update_bits(data->regmap, control->deassert_offset, mask, value); } /** @@ -223,6 +230,10 @@ static int ti_syscon_reset_probe(struct platform_device *pdev) data->assert_deassert_together = true; else data->assert_deassert_together = false; + if (of_property_read_bool(np, "update-force")) + data->update_force = true; + else + data->update_force = false; data->rcdev.ops = &ti_syscon_reset_ops; data->rcdev.owner = THIS_MODULE;