Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756076Ab1DVQDl (ORCPT ); Fri, 22 Apr 2011 12:03:41 -0400 Received: from metis.ext.pengutronix.de ([92.198.50.35]:44215 "EHLO metis.ext.pengutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756026Ab1DVQDk (ORCPT ); Fri, 22 Apr 2011 12:03:40 -0400 Message-ID: <4DB1A6CE.2080803@pengutronix.de> Date: Fri, 22 Apr 2011 18:03:26 +0200 From: Marc Kleine-Budde Organization: Pengutronix User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.14) Gecko/20110223 Thunderbird/3.1.8 MIME-Version: 1.0 To: Subhasish Ghosh CC: davinci-linux-open-source@linux.davincidsp.com, Kevin Hilman , sachi@mistralsolutions.com, Russell King , nsekhar@ti.com, open list , m-watkins@ti.com, linux-arm-kernel@lists.infradead.org Subject: Re: [PATCH v4 11/11] da850: pruss CAN board specific additions. References: <1303474109-6212-1-git-send-email-subhasish@mistralsolutions.com> <1303474109-6212-12-git-send-email-subhasish@mistralsolutions.com> In-Reply-To: <1303474109-6212-12-git-send-email-subhasish@mistralsolutions.com> X-Enigmail-Version: 1.1.2 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="------------enigC6C8A98F4FBE583E5BD5B940" X-SA-Exim-Connect-IP: 2001:6f8:1178:4:5054:ff:fe8d:eefb X-SA-Exim-Mail-From: mkl@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-kernel@vger.kernel.org Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4027 Lines: 123 This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enigC6C8A98F4FBE583E5BD5B940 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable On 04/22/2011 02:08 PM, Subhasish Ghosh wrote: > This patch adds the pruss CAN pinmux and registers the device > with the pruss mfd driver. >=20 > Signed-off-by: Subhasish Ghosh > --- > arch/arm/mach-davinci/board-da850-evm.c | 46 +++++++++++++++++++++++= ++++++++ > 1 files changed, 46 insertions(+), 0 deletions(-) >=20 > diff --git a/arch/arm/mach-davinci/board-da850-evm.c b/arch/arm/mach-da= vinci/board-da850-evm.c > index e7fdf31..e1ff18c 100644 > --- a/arch/arm/mach-davinci/board-da850-evm.c > +++ b/arch/arm/mach-davinci/board-da850-evm.c > @@ -48,6 +48,7 @@ > =20 > #define DA850_MMCSD_CD_PIN GPIO_TO_PIN(4, 0) > #define DA850_MMCSD_WP_PIN GPIO_TO_PIN(4, 1) > +#define DA850_PRUSS_CAN_TRX_PIN GPIO_TO_PIN(2, 0) > =20 > #define DA850_MII_MDIO_CLKEN_PIN GPIO_TO_PIN(2, 6) > =20 > @@ -1117,6 +1118,43 @@ static __init int da850_evm_init_cpufreq(void) > static __init int da850_evm_init_cpufreq(void) { return 0; } > #endif > =20 > +static const short da850_evm_pruss_can_pins[] =3D { > + DA850_PRUSS_PRU0_R31_0, DA850_PRUSS_PRU1_R30_15, > + DA850_PRUSS_PRU1_R31_18, DA850_GPIO2_0, > + -1 > +}; > + > +static int __init da850_evm_pruss_can_setup(void) > +{ > + int ret, val =3D 0; > + void __iomem *cfg_chip3_reg; > + > + ret =3D davinci_cfg_reg_list(da850_evm_pruss_can_pins); > + if (ret) > + pr_warning("%s: da850_evm_pruss_can_pins mux setup " > + "failed:%d\n", __func__, ret); > + cfg_chip3_reg =3D DA8XX_SYSCFG0_VIRT(DA8XX_CFGCHIP3_REG); > + val =3D __raw_readl(cfg_chip3_reg); > + val |=3D BIT(3); > + __raw_writel(val, cfg_chip3_reg); > + > + /* value =3D 0 to enable the CAN transceiver */ > + ret =3D gpio_request_one(DA850_PRUSS_CAN_TRX_PIN, > + GPIOF_OUT_INIT_LOW, "pruss_can_en"); > + if (ret) { > + pr_warning("Cannot setup GPIO %d\n", DA850_PRUSS_CAN_TRX_PIN); > + gpio_free(DA850_PRUSS_CAN_TRX_PIN); > + } > + > + return ret; > +} > + > +static struct da850_evm_pruss_can_data can_data =3D { > + .version =3D 1, > + .setup =3D da850_evm_pruss_can_setup, I suggest to do the pinmux setup unconditionally before registering the can driver. Rename setup into transceiver_switch and extend the driver to switch on and off the transceiver. Call the transceiver switch from open and close in the can drver. > +}; > + > + > static const short da850_evm_pruss_suart_pins[] =3D { > DA850_AHCLKX, DA850_ACLKX, DA850_AFSX, > DA850_AHCLKR, DA850_ACLKR, DA850_AFSR, > @@ -1161,6 +1199,14 @@ static struct mfd_cell cell[] =3D { > .resources =3D da850_evm_pruss_suart_resource, > }, > { > + .id =3D 1, > + .name =3D "da8xx_pruss_can", > + .platform_data =3D &can_data, > + .data_size =3D sizeof(can_data), > + .num_resources =3D 0, > + .resources =3D NULL, > + }, > + { > .name =3D NULL, > }, > }; Marc --=20 Pengutronix e.K. | Marc Kleine-Budde | Industrial Linux Solutions | Phone: +49-231-2826-924 | Vertretung West/Dortmund | Fax: +49-5121-206917-5555 | Amtsgericht Hildesheim, HRA 2686 | http://www.pengutronix.de | --------------enigC6C8A98F4FBE583E5BD5B940 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAk2xps4ACgkQjTAFq1RaXHPAIACcCca7OfD7ScOpk3d+DV0wnjic naMAn0dqrKUPEnXw/TqrnG51Q0+11+RO =zNsb -----END PGP SIGNATURE----- --------------enigC6C8A98F4FBE583E5BD5B940-- -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/