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[82.127.142.33]) by smtp.gmail.com with ESMTPSA id f67sm19873313wme.16.2019.11.18.03.00.41 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 18 Nov 2019 03:00:42 -0800 (PST) From: =?UTF-8?q?Cl=C3=A9ment=20P=C3=A9ron?= To: Thierry Reding , =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?= , Rob Herring , Mark Rutland , Maxime Ripard , Chen-Yu Tsai , Philipp Zabel Cc: linux-pwm@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-sunxi@googlegroups.com, Jernej Skrabec , =?UTF-8?q?Cl=C3=A9ment=20P=C3=A9ron?= Subject: [PATCH v6 4/8] pwm: sun4i: Add an optional probe for bus clock Date: Mon, 18 Nov 2019 12:00:30 +0100 Message-Id: <20191118110034.19444-5-peron.clem@gmail.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20191118110034.19444-1-peron.clem@gmail.com> References: <20191118110034.19444-1-peron.clem@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Jernej Skrabec H6 PWM core needs bus clock to be enabled in order to work. Add an optional probe for it. Signed-off-by: Jernej Skrabec Signed-off-by: Clément Péron --- drivers/pwm/pwm-sun4i.c | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) diff --git a/drivers/pwm/pwm-sun4i.c b/drivers/pwm/pwm-sun4i.c index 6d97fef4ed43..ce83d479ba0e 100644 --- a/drivers/pwm/pwm-sun4i.c +++ b/drivers/pwm/pwm-sun4i.c @@ -78,6 +78,7 @@ struct sun4i_pwm_data { struct sun4i_pwm_chip { struct pwm_chip chip; + struct clk *bus_clk; struct clk *clk; struct reset_control *rst; void __iomem *base; @@ -391,6 +392,14 @@ static int sun4i_pwm_probe(struct platform_device *pdev) } } + pwm->bus_clk = devm_clk_get_optional(&pdev->dev, "bus"); + if (IS_ERR(pwm->bus_clk)) { + if (PTR_ERR(pwm->rst) != -EPROBE_DEFER) + dev_err(&pdev->dev, "get bus clock failed %pe\n", + pwm->bus_clk); + return PTR_ERR(pwm->bus_clk); + } + pwm->rst = devm_reset_control_get_optional_shared(&pdev->dev, NULL); if (IS_ERR(pwm->rst)) { if (PTR_ERR(pwm->rst) != -EPROBE_DEFER) @@ -406,6 +415,16 @@ static int sun4i_pwm_probe(struct platform_device *pdev) return ret; } + /* + * We're keeping the bus clock on for the sake of simplicity. + * Actually it only needs to be on for hardware register accesses. + */ + ret = clk_prepare_enable(pwm->bus_clk); + if (ret) { + dev_err(&pdev->dev, "Cannot prepare and enable bus_clk\n"); + goto err_bus; + } + pwm->chip.dev = &pdev->dev; pwm->chip.ops = &sun4i_pwm_ops; pwm->chip.base = -1; @@ -426,6 +445,8 @@ static int sun4i_pwm_probe(struct platform_device *pdev) return 0; err_pwm_add: + clk_disable_unprepare(pwm->bus_clk); +err_bus: reset_control_assert(pwm->rst); return ret; @@ -440,6 +461,7 @@ static int sun4i_pwm_remove(struct platform_device *pdev) if (ret) return ret; + clk_disable_unprepare(pwm->bus_clk); reset_control_assert(pwm->rst); return 0; -- 2.20.1 From mboxrd@z Thu Jan 1 00:00:00 1970 From: =?UTF-8?q?Cl=C3=A9ment=20P=C3=A9ron?= Subject: [PATCH v6 4/8] pwm: sun4i: Add an optional probe for bus clock Date: Mon, 18 Nov 2019 12:00:30 +0100 Message-ID: <20191118110034.19444-5-peron.clem@gmail.com> References: <20191118110034.19444-1-peron.clem@gmail.com> Reply-To: peron.clem-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Return-path: Sender: linux-sunxi-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org In-Reply-To: <20191118110034.19444-1-peron.clem-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> List-Post: , List-Help: , List-Archive: , List-Unsubscribe: , To: Thierry Reding , =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?= , Rob Herring , Mark Rutland , Maxime Ripard , Chen-Yu Tsai , Philipp Zabel Cc: linux-pwm-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-sunxi-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org, Jernej Skrabec , =?UTF-8?q?Cl=C3=A9ment=20P=C3=A9ron?= List-Id: linux-pwm@vger.kernel.org From: Jernej Skrabec H6 PWM core needs bus clock to be enabled in order to work. Add an optional probe for it. Signed-off-by: Jernej Skrabec Signed-off-by: Cl=C3=A9ment P=C3=A9ron --- drivers/pwm/pwm-sun4i.c | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) diff --git a/drivers/pwm/pwm-sun4i.c b/drivers/pwm/pwm-sun4i.c index 6d97fef4ed43..ce83d479ba0e 100644 --- a/drivers/pwm/pwm-sun4i.c +++ b/drivers/pwm/pwm-sun4i.c @@ -78,6 +78,7 @@ struct sun4i_pwm_data { =20 struct sun4i_pwm_chip { struct pwm_chip chip; + struct clk *bus_clk; struct clk *clk; struct reset_control *rst; void __iomem *base; @@ -391,6 +392,14 @@ static int sun4i_pwm_probe(struct platform_device *pde= v) } } =20 + pwm->bus_clk =3D devm_clk_get_optional(&pdev->dev, "bus"); + if (IS_ERR(pwm->bus_clk)) { + if (PTR_ERR(pwm->rst) !=3D -EPROBE_DEFER) + dev_err(&pdev->dev, "get bus clock failed %pe\n", + pwm->bus_clk); + return PTR_ERR(pwm->bus_clk); + } + pwm->rst =3D devm_reset_control_get_optional_shared(&pdev->dev, NULL); if (IS_ERR(pwm->rst)) { if (PTR_ERR(pwm->rst) !=3D -EPROBE_DEFER) @@ -406,6 +415,16 @@ static int sun4i_pwm_probe(struct platform_device *pde= v) return ret; } =20 + /* + * We're keeping the bus clock on for the sake of simplicity. + * Actually it only needs to be on for hardware register accesses. + */ + ret =3D clk_prepare_enable(pwm->bus_clk); + if (ret) { + dev_err(&pdev->dev, "Cannot prepare and enable bus_clk\n"); + goto err_bus; + } + pwm->chip.dev =3D &pdev->dev; pwm->chip.ops =3D &sun4i_pwm_ops; pwm->chip.base =3D -1; @@ -426,6 +445,8 @@ static int sun4i_pwm_probe(struct platform_device *pdev= ) return 0; =20 err_pwm_add: + clk_disable_unprepare(pwm->bus_clk); +err_bus: reset_control_assert(pwm->rst); =20 return ret; @@ -440,6 +461,7 @@ static int sun4i_pwm_remove(struct platform_device *pde= v) if (ret) return ret; =20 + clk_disable_unprepare(pwm->bus_clk); reset_control_assert(pwm->rst); =20 return 0; --=20 2.20.1 --=20 You received this message because you are subscribed to the Google Groups "= linux-sunxi" group. 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[82.127.142.33]) by smtp.gmail.com with ESMTPSA id f67sm19873313wme.16.2019.11.18.03.00.41 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 18 Nov 2019 03:00:42 -0800 (PST) From: =?UTF-8?q?Cl=C3=A9ment=20P=C3=A9ron?= To: Thierry Reding , =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?= , Rob Herring , Mark Rutland , Maxime Ripard , Chen-Yu Tsai , Philipp Zabel Subject: [PATCH v6 4/8] pwm: sun4i: Add an optional probe for bus clock Date: Mon, 18 Nov 2019 12:00:30 +0100 Message-Id: <20191118110034.19444-5-peron.clem@gmail.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20191118110034.19444-1-peron.clem@gmail.com> References: <20191118110034.19444-1-peron.clem@gmail.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191118_030044_032468_B6B4A663 X-CRM114-Status: GOOD ( 14.53 ) 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: linux-pwm@vger.kernel.org, Jernej Skrabec , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-sunxi@googlegroups.com, =?UTF-8?q?Cl=C3=A9ment=20P=C3=A9ron?= , linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org RnJvbTogSmVybmVqIFNrcmFiZWMgPGplcm5lai5za3JhYmVjQHNpb2wubmV0PgoKSDYgUFdNIGNv cmUgbmVlZHMgYnVzIGNsb2NrIHRvIGJlIGVuYWJsZWQgaW4gb3JkZXIgdG8gd29yay4KCkFkZCBh biBvcHRpb25hbCBwcm9iZSBmb3IgaXQuCgpTaWduZWQtb2ZmLWJ5OiBKZXJuZWogU2tyYWJlYyA8 amVybmVqLnNrcmFiZWNAc2lvbC5uZXQ+ClNpZ25lZC1vZmYtYnk6IENsw6ltZW50IFDDqXJvbiA8 cGVyb24uY2xlbUBnbWFpbC5jb20+Ci0tLQogZHJpdmVycy9wd20vcHdtLXN1bjRpLmMgfCAyMiAr KysrKysrKysrKysrKysrKysrKysrCiAxIGZpbGUgY2hhbmdlZCwgMjIgaW5zZXJ0aW9ucygrKQoK ZGlmZiAtLWdpdCBhL2RyaXZlcnMvcHdtL3B3bS1zdW40aS5jIGIvZHJpdmVycy9wd20vcHdtLXN1 bjRpLmMKaW5kZXggNmQ5N2ZlZjRlZDQzLi5jZTgzZDQ3OWJhMGUgMTAwNjQ0Ci0tLSBhL2RyaXZl cnMvcHdtL3B3bS1zdW40aS5jCisrKyBiL2RyaXZlcnMvcHdtL3B3bS1zdW40aS5jCkBAIC03OCw2 ICs3OCw3IEBAIHN0cnVjdCBzdW40aV9wd21fZGF0YSB7CiAKIHN0cnVjdCBzdW40aV9wd21fY2hp cCB7CiAJc3RydWN0IHB3bV9jaGlwIGNoaXA7CisJc3RydWN0IGNsayAqYnVzX2NsazsKIAlzdHJ1 Y3QgY2xrICpjbGs7CiAJc3RydWN0IHJlc2V0X2NvbnRyb2wgKnJzdDsKIAl2b2lkIF9faW9tZW0g KmJhc2U7CkBAIC0zOTEsNiArMzkyLDE0IEBAIHN0YXRpYyBpbnQgc3VuNGlfcHdtX3Byb2JlKHN0 cnVjdCBwbGF0Zm9ybV9kZXZpY2UgKnBkZXYpCiAJCX0KIAl9CiAKKwlwd20tPmJ1c19jbGsgPSBk ZXZtX2Nsa19nZXRfb3B0aW9uYWwoJnBkZXYtPmRldiwgImJ1cyIpOworCWlmIChJU19FUlIocHdt LT5idXNfY2xrKSkgeworCQlpZiAoUFRSX0VSUihwd20tPnJzdCkgIT0gLUVQUk9CRV9ERUZFUikK KwkJCWRldl9lcnIoJnBkZXYtPmRldiwgImdldCBidXMgY2xvY2sgZmFpbGVkICVwZVxuIiwKKwkJ CQlwd20tPmJ1c19jbGspOworCQlyZXR1cm4gUFRSX0VSUihwd20tPmJ1c19jbGspOworCX0KKwog CXB3bS0+cnN0ID0gZGV2bV9yZXNldF9jb250cm9sX2dldF9vcHRpb25hbF9zaGFyZWQoJnBkZXYt PmRldiwgTlVMTCk7CiAJaWYgKElTX0VSUihwd20tPnJzdCkpIHsKIAkJaWYgKFBUUl9FUlIocHdt LT5yc3QpICE9IC1FUFJPQkVfREVGRVIpCkBAIC00MDYsNiArNDE1LDE2IEBAIHN0YXRpYyBpbnQg c3VuNGlfcHdtX3Byb2JlKHN0cnVjdCBwbGF0Zm9ybV9kZXZpY2UgKnBkZXYpCiAJCXJldHVybiBy ZXQ7CiAJfQogCisJLyoKKwkgKiBXZSdyZSBrZWVwaW5nIHRoZSBidXMgY2xvY2sgb24gZm9yIHRo ZSBzYWtlIG9mIHNpbXBsaWNpdHkuCisJICogQWN0dWFsbHkgaXQgb25seSBuZWVkcyB0byBiZSBv biBmb3IgaGFyZHdhcmUgcmVnaXN0ZXIgYWNjZXNzZXMuCisJICovCisJcmV0ID0gY2xrX3ByZXBh cmVfZW5hYmxlKHB3bS0+YnVzX2Nsayk7CisJaWYgKHJldCkgeworCQlkZXZfZXJyKCZwZGV2LT5k ZXYsICJDYW5ub3QgcHJlcGFyZSBhbmQgZW5hYmxlIGJ1c19jbGtcbiIpOworCQlnb3RvIGVycl9i dXM7CisJfQorCiAJcHdtLT5jaGlwLmRldiA9ICZwZGV2LT5kZXY7CiAJcHdtLT5jaGlwLm9wcyA9 ICZzdW40aV9wd21fb3BzOwogCXB3bS0+Y2hpcC5iYXNlID0gLTE7CkBAIC00MjYsNiArNDQ1LDgg QEAgc3RhdGljIGludCBzdW40aV9wd21fcHJvYmUoc3RydWN0IHBsYXRmb3JtX2RldmljZSAqcGRl dikKIAlyZXR1cm4gMDsKIAogZXJyX3B3bV9hZGQ6CisJY2xrX2Rpc2FibGVfdW5wcmVwYXJlKHB3 bS0+YnVzX2Nsayk7CitlcnJfYnVzOgogCXJlc2V0X2NvbnRyb2xfYXNzZXJ0KHB3bS0+cnN0KTsK IAogCXJldHVybiByZXQ7CkBAIC00NDAsNiArNDYxLDcgQEAgc3RhdGljIGludCBzdW40aV9wd21f cmVtb3ZlKHN0cnVjdCBwbGF0Zm9ybV9kZXZpY2UgKnBkZXYpCiAJaWYgKHJldCkKIAkJcmV0dXJu IHJldDsKIAorCWNsa19kaXNhYmxlX3VucHJlcGFyZShwd20tPmJ1c19jbGspOwogCXJlc2V0X2Nv bnRyb2xfYXNzZXJ0KHB3bS0+cnN0KTsKIAogCXJldHVybiAwOwotLSAKMi4yMC4xCgoKX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KbGludXgtYXJtLWtlcm5l bCBtYWlsaW5nIGxpc3QKbGludXgtYXJtLWtlcm5lbEBsaXN0cy5pbmZyYWRlYWQub3JnCmh0dHA6 Ly9saXN0cy5pbmZyYWRlYWQub3JnL21haWxtYW4vbGlzdGluZm8vbGludXgtYXJtLWtlcm5lbAo=