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Wed, 19 Nov 2025 03:53:28 -0800 (PST) From: Encrow Thorne Date: Wed, 19 Nov 2025 19:46:44 +0800 Subject: [PATCH 2/3] i2c: k1: add reset support Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20251119-i2c-k1_reset-support-v1-2-0e9e82bf9b65@gmail.com> References: <20251119-i2c-k1_reset-support-v1-0-0e9e82bf9b65@gmail.com> In-Reply-To: <20251119-i2c-k1_reset-support-v1-0-0e9e82bf9b65@gmail.com> To: Troy Mitchell , Andi Shyti , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Yixun Lan , Philipp Zabel , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti Cc: Troy Mitchell , linux-i2c@vger.kernel.org, devicetree@vger.kernel.org, linux-riscv@lists.infradead.org, spacemit@lists.linux.dev, linux-kernel@vger.kernel.org, Encrow Thorne X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=ed25519-sha256; t=1763553189; l=1326; i=jyc0019@gmail.com; s=20251009; h=from:subject:message-id; bh=wTE8n3djZOFBW0Hn/pyVrrtw+swJ6pskokEvgXPqj2g=; b=5RS6cTQPwPDN1vYMenh1/T6oCu1CCVSmO2dMgtFDaHcqcKQ5jm6tl9fU0b/ialCby2DQo8WcY UhTQmN0qij1BbrInMIivwpwRgL5t5RjCVIFFOS2v5J35vm0U4BBgqtw X-Developer-Key: i=jyc0019@gmail.com; a=ed25519; pk=nnjLv04DUE0FXih6IcJUOjWFTEoo4xYQOu7m5RRHvZ4= Add reset control handling to the K1 I2C driver. Signed-off-by: Encrow Thorne --- drivers/i2c/busses/i2c-k1.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/drivers/i2c/busses/i2c-k1.c b/drivers/i2c/busses/i2c-k1.c index 6b918770e612..64d817d8315d 100644 --- a/drivers/i2c/busses/i2c-k1.c +++ b/drivers/i2c/busses/i2c-k1.c @@ -10,6 +10,7 @@ #include #include #include + #include /* spacemit i2c registers */ #define SPACEMIT_ICR 0x0 /* Control register */ @@ -113,6 +114,7 @@ struct spacemit_i2c_dev { void __iomem *base; int irq; u32 clock_freq; + struct reset_control *resets; struct i2c_msg *msgs; u32 msg_num; @@ -571,6 +573,15 @@ static int spacemit_i2c_probe(struct platform_device *pdev) if (IS_ERR(clk)) return dev_err_probe(dev, PTR_ERR(clk), "failed to enable bus clock"); + i2c->resets = devm_reset_control_get_optional(dev, NULL); + if (IS_ERR(i2c->resets)) + return dev_err_probe(dev, PTR_ERR(i2c->resets), + "failed to get reset\n"); + + reset_control_assert(i2c->resets); + udelay(2); + reset_control_deassert(i2c->resets); + spacemit_i2c_reset(i2c); i2c_set_adapdata(&i2c->adapt, i2c); -- 2.25.1