Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932714AbdCWIHG (ORCPT ); Thu, 23 Mar 2017 04:07:06 -0400 Received: from mailgw02.mediatek.com ([210.61.82.184]:49521 "EHLO mailgw02.mediatek.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1753603AbdCWIHE (ORCPT ); Thu, 23 Mar 2017 04:07:04 -0400 Message-ID: <1490256416.14184.2.camel@mtkswgap22> Subject: Re: [PATCH net-next v2 5/5] net-next: dsa: add dsa support for Mediatek MT7530 switch From: Sean Wang To: Andrew Lunn CC: , , , , , , , , , , , , Date: Thu, 23 Mar 2017 16:06:56 +0800 In-Reply-To: <20170323072233.GA10076@lunn.ch> References: <1490088910-19405-1-git-send-email-sean.wang@mediatek.com> <1490088910-19405-6-git-send-email-sean.wang@mediatek.com> <20170323072233.GA10076@lunn.ch> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.2.3-0ubuntu6 Content-Transfer-Encoding: 7bit MIME-Version: 1.0 X-MTK: N Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3919 Lines: 115 Hi Andrew, The purpose for the regmap table registered is to provide a way which helps us to look up a specific register on the switch through regmap-debugfs. And not all ranges of register is defined so I only include the meaningful ones in a sparse way for the table. Sean On Thu, 2017-03-23 at 08:22 +0100, Andrew Lunn wrote: > > +static int > > +mt7623_trgmii_write(struct mt7530_priv *priv, u32 reg, u32 val) > > +{ > > + int ret; > > + > > + ret = regmap_write(priv->ethernet, TRGMII_BASE(reg), val); > > + if (ret < 0) > > + dev_err(priv->dev, > > + "failed to priv write register\n"); > > + return ret; > > +} > > + > > +static u32 > > +mt7623_trgmii_read(struct mt7530_priv *priv, u32 reg) > > +{ > > + int ret; > > + u32 val; > > + > > + ret = regmap_read(priv->ethernet, TRGMII_BASE(reg), &val); > > + if (ret < 0) { > > + dev_err(priv->dev, > > + "failed to priv read register\n"); > > + return ret; > > + } > > + > > + return val; > > +} > > Hi Sean > > These appear to be the only two accessors which use the regmap. > > > +static int > > +mt7530_regmap_read(void *ctx, uint32_t reg, uint32_t *val) > > +{ > > + struct mt7530_priv *priv = (struct mt7530_priv *)ctx; > > + > > + /* BIT(15) is used as indication for pseudo registers > > + * which would be translated into the general MDIO > > + * access to leverage the unique regmap sys interface. > > + */ > > + if (reg & BIT(15)) > > + *val = mdiobus_read_nested(priv->bus, > > + (reg & 0xf00) >> 8, > > + (reg & 0xff) >> 2); > > + else > > + *val = mt7530_read(priv, reg); > > + > > + return 0; > > +} > > ..... > > > +static const struct regmap_range mt7530_readable_ranges[] = { > > + regmap_reg_range(0x0000, 0x00ac), /* Global control */ > > + regmap_reg_range(0x2000, 0x202c), /* Port Control - P0 */ > > + regmap_reg_range(0x2100, 0x212c), /* Port Control - P1 */ > > + regmap_reg_range(0x2200, 0x222c), /* Port Control - P2 */ > > + regmap_reg_range(0x2300, 0x232c), /* Port Control - P3 */ > > + regmap_reg_range(0x2400, 0x242c), /* Port Control - P4 */ > > + regmap_reg_range(0x2500, 0x252c), /* Port Control - P5 */ > > + regmap_reg_range(0x2600, 0x262c), /* Port Control - P6 */ > > + regmap_reg_range(0x30e0, 0x30f8), /* Port MAC - SYS */ > > + regmap_reg_range(0x3000, 0x3014), /* Port MAC - P0 */ > > + regmap_reg_range(0x3100, 0x3114), /* Port MAC - P1 */ > > + regmap_reg_range(0x3200, 0x3214), /* Port MAC - P2*/ > > + regmap_reg_range(0x3300, 0x3314), /* Port MAC - P3*/ > > + regmap_reg_range(0x3400, 0x3414), /* Port MAC - P4 */ > > + regmap_reg_range(0x3500, 0x3514), /* Port MAC - P5 */ > > + regmap_reg_range(0x3600, 0x3614), /* Port MAC - P6 */ > > + regmap_reg_range(0x4000, 0x40d4), /* MIB - P0 */ > > + regmap_reg_range(0x4100, 0x41d4), /* MIB - P1 */ > > + regmap_reg_range(0x4200, 0x42d4), /* MIB - P2 */ > > + regmap_reg_range(0x4300, 0x43d4), /* MIB - P3 */ > > + regmap_reg_range(0x4400, 0x44d4), /* MIB - P4 */ > > + regmap_reg_range(0x4500, 0x45d4), /* MIB - P5 */ > > + regmap_reg_range(0x4600, 0x46d4), /* MIB - P6 */ > > + regmap_reg_range(0x4fe0, 0x4ff4), /* SYS */ > > + regmap_reg_range(0x7000, 0x700c), /* SYS 2 */ > > + regmap_reg_range(0x7018, 0x7028), /* SYS 3 */ > > + regmap_reg_range(0x7800, 0x7830), /* SYS 4 */ > > + regmap_reg_range(0x7a00, 0x7a7c), /* TRGMII */ > > + regmap_reg_range(0x8000, 0x8078), /* Psedo address for Phy - P0 */ > > + regmap_reg_range(0x8100, 0x8178), /* Psedo address for Phy - P1 */ > > + regmap_reg_range(0x8200, 0x8278), /* Psedo address for Phy - P2 */ > > + regmap_reg_range(0x8300, 0x8378), /* Psedo address for Phy - P3 */ > > + regmap_reg_range(0x8400, 0x8478), /* Psedo address for Phy - P4 */ > > +}; > > It looks like your regmap accessor are only used for 0x7a00 to 0x7a7c. > > It is not clear why you even bother with a regmap. If you have it, why > not use it for all registers within the regmap? > > Andrew