From mboxrd@z Thu Jan 1 00:00:00 1970 From: Wolfram Sang Subject: Re: [PATCH] i2c: designware: add reset interface Date: Tue, 13 Dec 2016 21:34:57 +0100 Message-ID: <20161213203457.GB2889@katana> References: <1479789700-19532-1-git-send-email-zhangfei.gao@linaro.org> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="WYTEVAkct0FjGQmd" Return-path: Received: from www.zeus03.de ([194.117.254.33]:57876 "EHLO mail.zeus03.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S964985AbcLMUfE (ORCPT ); Tue, 13 Dec 2016 15:35:04 -0500 Content-Disposition: inline In-Reply-To: <1479789700-19532-1-git-send-email-zhangfei.gao@linaro.org> Sender: linux-i2c-owner@vger.kernel.org List-Id: linux-i2c@vger.kernel.org To: Zhangfei Gao Cc: linux-arm-kernel@lists.infradead.org, linux-i2c@vger.kernel.org, Jarkko Nikula , Andy Shevchenko , Mika Westerberg --WYTEVAkct0FjGQmd Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Tue, Nov 22, 2016 at 12:41:40PM +0800, Zhangfei Gao wrote: > Some platforms like hi3660 need do reset first to allow accessing registe= rs >=20 > Signed-off-by: Zhangfei Gao Adding designware maintainers to CC... > --- > drivers/i2c/busses/i2c-designware-core.h | 1 + > drivers/i2c/busses/i2c-designware-platdrv.c | 5 +++++ > 2 files changed, 6 insertions(+) >=20 > diff --git a/drivers/i2c/busses/i2c-designware-core.h b/drivers/i2c/busse= s/i2c-designware-core.h > index 0d44d2a..94b14fa 100644 > --- a/drivers/i2c/busses/i2c-designware-core.h > +++ b/drivers/i2c/busses/i2c-designware-core.h > @@ -80,6 +80,7 @@ struct dw_i2c_dev { > void __iomem *base; > struct completion cmd_complete; > struct clk *clk; > + struct reset_control *rst; > u32 (*get_clk_rate_khz) (struct dw_i2c_dev *dev); > struct dw_pci_controller *controller; > int cmd_err; > diff --git a/drivers/i2c/busses/i2c-designware-platdrv.c b/drivers/i2c/bu= sses/i2c-designware-platdrv.c > index 0b42a12..fd80e58 100644 > --- a/drivers/i2c/busses/i2c-designware-platdrv.c > +++ b/drivers/i2c/busses/i2c-designware-platdrv.c > @@ -38,6 +38,7 @@ > #include > #include > #include > +#include > #include > #include > #include > @@ -176,6 +177,10 @@ static int dw_i2c_plat_probe(struct platform_device = *pdev) > dev->irq =3D irq; > platform_set_drvdata(pdev, dev); > =20 > + dev->rst =3D devm_reset_control_get(&pdev->dev, NULL); > + if (!IS_ERR(dev->rst)) > + reset_control_reset(dev->rst); > + > /* fast mode by default because of legacy reasons */ > dev->clk_freq =3D 400000; > =20 > --=20 > 2.7.4 >=20 --WYTEVAkct0FjGQmd Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIcBAEBAgAGBQJYUFtxAAoJEBQN5MwUoCm2UzcQAKasxTpPzMTl4fDpl4mPNYI/ WpVmR9xTvd5Ukf8LngwljiVpXYpnBDcxThc1Z2368uAfV/xCR/7y9WW1flwz4eYW LszBgr5/+zh7UdglamELzLe2EZphGAqzAoBZ2WOGpNXGJgN7V0VXLPjwSAXkBTih prUeLlimZ2OHHpUMd7XvoU1dRP3Gvuu6KN15HzjqHBRK5bK4+hAo0wDiA7e2kkmj BRXszp0OO1X9LRZZGg7zvjc9UPjTXJ9dv2LgRjIQMdECzjSYFLUnrMQMdQ8vcEUQ kKQuyLZAPpU9bcohM7SrY4B+W52/ELyGX4VsIEmC7I3NeKgLbx30nfc+apRqQJqt jMjngC20+0EjkaeTu1xEDsFu6aqPz7k5+NpjD5RPpyoLWcns3WbRjD02ATh6mV/o NOyMEzOlkqwIQWbgst5wHCPh2eJ+HaWzxThTlZ2Fmmn08TXXJiqlEEOJMQwSlHrr aN92w6jQw8N4j2pWZdmkkERyfam3UcL2ln01j0YEUpP3deahXbrF+R1GT+5TG99W 69c2xt4r+YQ5HMabQh/bghnNMv6qUXlZNrlUkgOvV63OKY2tjlk63uzhtWNv46SC kdO42EjOkLVsOgIz/OMVkvsOiuDU1phiQGzYCfRkXcZZgpsU4eB6SOt2g/iH+Uyd vbBIc87oKUMq3i+Mcb5w =13iO -----END PGP SIGNATURE----- --WYTEVAkct0FjGQmd--