From patchwork Mon May 20 08:31:01 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Manivannan Sadhasivam X-Patchwork-Id: 1101889 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=linux-gpio-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=pass (p=none dis=none) header.from=linaro.org Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=linaro.org header.i=@linaro.org header.b="wYliaoyk"; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 456sZ94Q1nz9s55 for ; Mon, 20 May 2019 18:31:45 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731408AbfETIbo (ORCPT ); Mon, 20 May 2019 04:31:44 -0400 Received: from mail-pf1-f196.google.com ([209.85.210.196]:47020 "EHLO mail-pf1-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729325AbfETIbo (ORCPT ); Mon, 20 May 2019 04:31:44 -0400 Received: by mail-pf1-f196.google.com with SMTP id y11so6844969pfm.13 for ; Mon, 20 May 2019 01:31:43 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=wZmd2sSqxBswncIP49DIhHiOiWPLqbCT+QWxEkOy/co=; b=wYliaoykTkMBfrBtk1tyMUrq5pCqug2hVNjNDCjfWMPgRZxZ6r8MN4oCs0as2iaX94 l49bbHxM/Ti/+pMIToe0NVyxo05Q8o0gotf2D7drpAiFeSQyPFce7ouk2hWMIO2ewDcH JC6lsKRqIABuvaVlrXyQqTXmgbzAWszMlw2xm1zaJUoJFg4G7hfuhMLQ9iRwbHUhtoM9 lj3mGApdgSgzKfp+rtMsHkY1r/mdKPtaLoBvgCZlvTPz3/Dza8DVB6dRnSx3bBJi6tTW OWmmmVXz7I6sDmRs1+j8SrGk7+yGW4Pknp8FJigwuR1P747ZiuG9Xsu2ZmtYbaJSdj7i UaKg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=wZmd2sSqxBswncIP49DIhHiOiWPLqbCT+QWxEkOy/co=; b=aIfhE/wDVETzgcB9YLr6g57bQzJLiTo86fO0RtXSHqn4HwCAmEfKrS+5mYunstla4I RYEiywTC4nHgnmAzK5shkU374gs1cg3dS/o4ZOEOiA7sON5cvs++gAyQFklm/aFC4Zcc 6XiZjG7iCxV4eFBhpGIvd8yFzRGYLlgoL1vzelSNT3ROOAHIPPplXr6UGx4sbzJKsUDa 8/6uAJ2PYFcKUKqqi5/MqE0op19VjuNvuq1IFOezdNHBJaejCgCFHdf8xqyNS7mlU7tt ZGixLE2MVLO+9n27JmLvqqTET+JwaE26obdVEnjntJ3+gBpNhcHK5j1TwxLfuY29c+Lm K9og== X-Gm-Message-State: APjAAAXa6LOFfFzdLHEnPuLygImTjZlxZqQOgl+Ha8qfxWMuEfn7r84y cX4YQ7dAqbUvDUzgCloBHdGZ X-Google-Smtp-Source: APXvYqxtgRk9hUYeKzUqFkTBf75l2tsN0xCN0ekdZ9P/6ymdT9+k/j2ax6QYys17dUs7LvLpFXwXGQ== X-Received: by 2002:a62:86c4:: with SMTP id x187mr77900616pfd.34.1558341103495; Mon, 20 May 2019 01:31:43 -0700 (PDT) Received: from localhost.localdomain ([2405:204:7203:2717:7d22:7fdb:b76e:242c]) by smtp.gmail.com with ESMTPSA id s72sm24068220pgc.65.2019.05.20.01.31.39 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 20 May 2019 01:31:43 -0700 (PDT) From: Manivannan Sadhasivam To: linus.walleij@linaro.org, robh+dt@kernel.org Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, haitao.suo@bitmain.com, darren.tsao@bitmain.com, linux-gpio@vger.kernel.org, alec.lin@bitmain.com, Manivannan Sadhasivam Subject: [PATCH 5/5] pinctrl: Add pinconf support for BM1880 SoC Date: Mon, 20 May 2019 14:01:01 +0530 Message-Id: <20190520083101.10229-6-manivannan.sadhasivam@linaro.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190520083101.10229-1-manivannan.sadhasivam@linaro.org> References: <20190520083101.10229-1-manivannan.sadhasivam@linaro.org> Sender: linux-gpio-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-gpio@vger.kernel.org Add pinconf support for Bitmain BM1880 SoC. Pinconf support includes pin bias, slew rate and schmitt trigger. Drive strength support will be added later. Signed-off-by: Manivannan Sadhasivam --- drivers/pinctrl/pinctrl-bm1880.c | 134 +++++++++++++++++++++++++++++++ 1 file changed, 134 insertions(+) diff --git a/drivers/pinctrl/pinctrl-bm1880.c b/drivers/pinctrl/pinctrl-bm1880.c index bddb705ea142..1aaed46d5c30 100644 --- a/drivers/pinctrl/pinctrl-bm1880.c +++ b/drivers/pinctrl/pinctrl-bm1880.c @@ -4,6 +4,8 @@ * * Copyright (c) 2019 Linaro Ltd. * Author: Manivannan Sadhasivam + * + * TODO: Drive strength support */ #include @@ -872,6 +874,137 @@ static int bm1880_pinmux_set_mux(struct pinctrl_dev *pctldev, return 0; } +#define BM1880_PINCONF(pin, idx) ((!((pin + 1) & 1) << 4) + idx) +#define BM1880_PINCONF_PULLCTRL(pin) BM1880_PINCONF(pin, 0) +#define BM1880_PINCONF_PULLUP(pin) BM1880_PINCONF(pin, 1) +#define BM1880_PINCONF_PULLDOWN(pin) BM1880_PINCONF(pin, 2) +#define BM1880_PINCONF_SCHMITT(pin) BM1880_PINCONF(pin, 9) +#define BM1880_PINCONF_SLEW(pin) BM1880_PINCONF(pin, 10) + +static int bm1880_pinconf_cfg_get(struct pinctrl_dev *pctldev, + unsigned int pin, + unsigned long *config) +{ + struct bm1880_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); + unsigned int param = pinconf_to_config_param(*config); + unsigned int arg = 0; + u32 regval, offset, bit_offset; + + offset = (pin >> 1) << 2; + regval = readl_relaxed(pctrl->base + BM1880_REG_MUX + offset); + + switch (param) { + case PIN_CONFIG_BIAS_PULL_UP: + bit_offset = BM1880_PINCONF_PULLUP(pin); + arg = !!(regval & BIT(bit_offset)); + break; + case PIN_CONFIG_BIAS_PULL_DOWN: + bit_offset = BM1880_PINCONF_PULLDOWN(pin); + arg = !!(regval & BIT(bit_offset)); + break; + case PIN_CONFIG_BIAS_DISABLE: + bit_offset = BM1880_PINCONF_PULLCTRL(pin); + arg = !!(regval & BIT(bit_offset)); + break; + case PIN_CONFIG_INPUT_SCHMITT_ENABLE: + bit_offset = BM1880_PINCONF_SCHMITT(pin); + arg = !!(regval & BIT(bit_offset)); + break; + case PIN_CONFIG_SLEW_RATE: + bit_offset = BM1880_PINCONF_SLEW(pin); + arg = !!(regval & BIT(bit_offset)); + break; + default: + return -ENOTSUPP; + } + + *config = pinconf_to_config_packed(param, arg); + + return 0; +} + +static int bm1880_pinconf_cfg_set(struct pinctrl_dev *pctldev, + unsigned int pin, + unsigned long *configs, + unsigned int num_configs) +{ + struct bm1880_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); + u32 regval, offset, bit_offset; + int i; + + offset = (pin >> 1) << 2; + regval = readl_relaxed(pctrl->base + BM1880_REG_MUX + offset); + + for (i = 0; i < num_configs; i++) { + unsigned int param = pinconf_to_config_param(configs[i]); + unsigned int arg = pinconf_to_config_argument(configs[i]); + + switch (param) { + case PIN_CONFIG_BIAS_PULL_UP: + bit_offset = BM1880_PINCONF_PULLUP(pin); + regval |= BIT(bit_offset); + break; + case PIN_CONFIG_BIAS_PULL_DOWN: + bit_offset = BM1880_PINCONF_PULLDOWN(pin); + regval |= BIT(bit_offset); + break; + case PIN_CONFIG_BIAS_DISABLE: + bit_offset = BM1880_PINCONF_PULLCTRL(pin); + regval |= BIT(bit_offset); + break; + case PIN_CONFIG_INPUT_SCHMITT_ENABLE: + bit_offset = BM1880_PINCONF_SCHMITT(pin); + if (arg) + regval |= BIT(bit_offset); + else + regval &= ~BIT(bit_offset); + break; + case PIN_CONFIG_SLEW_RATE: + bit_offset = BM1880_PINCONF_SLEW(pin); + if (arg) + regval |= BIT(bit_offset); + else + regval &= ~BIT(bit_offset); + break; + default: + dev_warn(pctldev->dev, + "unsupported configuration parameter '%u'\n", + param); + continue; + } + + writel_relaxed(regval, pctrl->base + BM1880_REG_MUX + offset); + } + + return 0; +} + +static int bm1880_pinconf_group_set(struct pinctrl_dev *pctldev, + unsigned int selector, + unsigned long *configs, + unsigned int num_configs) +{ + int i, ret; + struct bm1880_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); + const struct bm1880_pctrl_group *pgrp = &pctrl->groups[selector]; + + for (i = 0; i < pgrp->npins; i++) { + ret = bm1880_pinconf_cfg_set(pctldev, pgrp->pins[i], configs, + num_configs); + if (ret) + return ret; + } + + return 0; +} + +static const struct pinconf_ops bm1880_pinconf_ops = { + .is_generic = true, + .pin_config_get = bm1880_pinconf_cfg_get, + .pin_config_set = bm1880_pinconf_cfg_set, + .pin_config_group_set = bm1880_pinconf_group_set, +}; + static const struct pinmux_ops bm1880_pinmux_ops = { .get_functions_count = bm1880_pmux_get_functions_count, .get_function_name = bm1880_pmux_get_function_name, @@ -885,6 +1018,7 @@ static struct pinctrl_desc bm1880_desc = { .npins = ARRAY_SIZE(bm1880_pins), .pctlops = &bm1880_pctrl_ops, .pmxops = &bm1880_pinmux_ops, + .confops = &bm1880_pinconf_ops, .owner = THIS_MODULE, };