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[210.61.187.174]) by smtp.gmail.com with ESMTPSA id 41be03b00d2f7-b15f8597e0bsm8550119a12.44.2025.04.29.01.51.26 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 29 Apr 2025 01:51:34 -0700 (PDT) From: Guodong Xu To: ukleinek@kernel.org, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, alex@ghiti.fr, dlan@gentoo.org, p.zabel@pengutronix.de, drew@pdp7.com, inochiama@gmail.com, geert+renesas@glider.be, heylenay@4d2.org, tglx@linutronix.de, hal.feng@starfivetech.com, unicorn_wang@outlook.com, duje.mihanovic@skole.hr, heikki.krogerus@linux.intel.com Cc: elder@riscstar.com, linux-pwm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org, spacemit@lists.linux.dev, guodong@riscstar.com Subject: [PATCH v3 2/6] pwm: pxa: add optional reset control Date: Tue, 29 Apr 2025 16:50:44 +0800 Message-ID: <20250429085048.1310409-3-guodong@riscstar.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250429085048.1310409-1-guodong@riscstar.com> References: <20250429085048.1310409-1-guodong@riscstar.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Support optional reset control for the PWM PXA driver. During the probe, it acquires the reset controller using devm_reset_control_get_optional_exclusive_deasserted() to get and deassert the reset controller to enable the PWM channel. Signed-off-by: Guodong Xu --- v3: Dropped the addition of a reset_control field to the struct pxa_pwm_chip Using a local variable for reset in pwm_probe() instead v2: No change drivers/pwm/pwm-pxa.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/pwm/pwm-pxa.c b/drivers/pwm/pwm-pxa.c index 430bd6a709e9..f6a862531601 100644 --- a/drivers/pwm/pwm-pxa.c +++ b/drivers/pwm/pwm-pxa.c @@ -25,6 +25,7 @@ #include #include #include +#include =20 #include =20 @@ -160,6 +161,7 @@ static int pwm_probe(struct platform_device *pdev) const struct platform_device_id *id =3D platform_get_device_id(pdev); struct pwm_chip *chip; struct pxa_pwm_chip *pc; + struct reset_control *rst; int ret =3D 0; =20 if (IS_ENABLED(CONFIG_OF) && id =3D=3D NULL) @@ -179,6 +181,11 @@ static int pwm_probe(struct platform_device *pdev) if (IS_ERR(pc->clk)) return PTR_ERR(pc->clk); =20 + rst =3D devm_reset_control_get_optional_exclusive_deasserted(&pdev->dev, + NULL); + if (IS_ERR(rst)) + return PTR_ERR(rst); + chip->ops =3D &pxa_pwm_ops; =20 if (IS_ENABLED(CONFIG_OF)) --=20 2.43.0