From patchwork Sat May 6 21:19:02 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?b?TWljaGHFgiBNaXJvc8WCYXc=?= X-Patchwork-Id: 679668 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3154AC7EE22 for ; Sat, 6 May 2023 21:19:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229881AbjEFVTJ (ORCPT ); Sat, 6 May 2023 17:19:09 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44630 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229446AbjEFVTI (ORCPT ); Sat, 6 May 2023 17:19:08 -0400 Received: from rere.qmqm.pl (rere.qmqm.pl [91.227.64.183]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 963E28A60; Sat, 6 May 2023 14:19:05 -0700 (PDT) Received: from remote.user (localhost [127.0.0.1]) by rere.qmqm.pl (Postfix) with ESMTPSA id 4QDL5f3CkYzBr; Sat, 6 May 2023 23:19:02 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=rere.qmqm.pl; s=1; t=1683407942; bh=awLAvYVYY1Hw6JPyY91yctNAjsWIDgy3YBAXa3CweBw=; h=Date:In-Reply-To:References:From:Subject:To:Cc:From; b=cvxrKEuiyxlHVNIwzgoglYAaCUnnYNJGRj9pddIT2xa9qsXzQS8WVnHMpoA71dC+K ARZ/r7nLjfg/GM6dATnKFV4gLrascLu9LMa9350p9sMEJU434j41mmaOOi5OI0w64S oNZxjTT00OoaGUqEmaBe0qgiYoEB68AD8POqaS3FDCJFWgtHDGCv2OSuvKmyeyTb7X /zlPmiWuY/4o+IzZ8XVIkxhs5D1vfrWPlrTkc6/hnwpVMPUvjh0cj6BCrHlpi2xBlm 8Q0USUxAWdQ0+9k/ezgslIAy3TY6Ps+HAk3zKBJoN4/v3fezuHZFg+CFHh3U0mTwrP TG3nZvtIlHFNQ== X-Virus-Status: Clean X-Virus-Scanned: clamav-milter 0.103.8 at mail Date: Sat, 06 May 2023 23:19:02 +0200 Message-Id: <0248c0737ace5db7be4e04f97985f3e7874ff1ab.1683407699.git.mirq-linux@rere.qmqm.pl> In-Reply-To: References: From: =?utf-8?b?TWljaGHFgiBNaXJvc8WCYXc=?= Subject: [PATCH v4 2/2] i2c: tegra: allow VI support to be compiled out MIME-Version: 1.0 To: Dmitry Osipenko , Jonathan Hunter , Laxman Dewangan , Thierry Reding Cc: linux-i2c@vger.kernel.org, linux-kernel@vger.kernel.org, linux-tegra@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-i2c@vger.kernel.org Save a bit of code for older Tegra platforms by compiling out VI's I2C mode support that's used only for Tegra210. $ size i2c-tegra.o text data bss dec hex filename 11381 292 8 11681 2da1 i2c-tegra.o (full) 10193 292 8 10493 28fd i2c-tegra.o (no-dvc) 9145 292 8 9445 24e5 i2c-tegra.o (no-vi,no-dvc) Signed-off-by: Michał Mirosław Reviewed-by: Dmitry Osipenko Reviewed-by: Wolfram Sang --- v4: include a missed is_vi check in i2c_writel() readback v3: add parentheses for IS_VI() macro value v2: remove KConfig symbol as per Dmitry Osipenko's suggestion. (Assuming that for Tegra210 the VI part will be used anyway.) --- drivers/i2c/busses/i2c-tegra.c | 24 ++++++++++++++---------- 1 file changed, 14 insertions(+), 10 deletions(-) diff --git a/drivers/i2c/busses/i2c-tegra.c b/drivers/i2c/busses/i2c-tegra.c index 51ef2e80e8ce..d26f94364fbc 100644 --- a/drivers/i2c/busses/i2c-tegra.c +++ b/drivers/i2c/busses/i2c-tegra.c @@ -299,6 +299,7 @@ struct tegra_i2c_dev { }; #define IS_DVC(dev) (IS_ENABLED(CONFIG_ARCH_TEGRA_2x_SOC) && (dev)->is_dvc) +#define IS_VI(dev) (IS_ENABLED(CONFIG_ARCH_TEGRA_210_SOC) && (dev)->is_vi) static void dvc_writel(struct tegra_i2c_dev *i2c_dev, u32 val, unsigned int reg) @@ -319,7 +320,7 @@ static u32 tegra_i2c_reg_addr(struct tegra_i2c_dev *i2c_dev, unsigned int reg) { if (IS_DVC(i2c_dev)) reg += (reg >= I2C_TX_FIFO) ? 0x10 : 0x40; - else if (i2c_dev->is_vi) + else if (IS_VI(i2c_dev)) reg = 0xc00 + (reg << 2); return reg; @@ -332,7 +333,7 @@ static void i2c_writel(struct tegra_i2c_dev *i2c_dev, u32 val, unsigned int reg) /* read back register to make sure that register writes completed */ if (reg != I2C_TX_FIFO) readl_relaxed(i2c_dev->base + tegra_i2c_reg_addr(i2c_dev, reg)); - else if (i2c_dev->is_vi) + else if (IS_VI(i2c_dev)) readl_relaxed(i2c_dev->base + tegra_i2c_reg_addr(i2c_dev, I2C_INT_STATUS)); } @@ -448,7 +449,7 @@ static int tegra_i2c_init_dma(struct tegra_i2c_dev *i2c_dev) u32 *dma_buf; int err; - if (i2c_dev->is_vi) + if (IS_VI(i2c_dev)) return 0; if (!i2c_dev->hw->has_apb_dma) { @@ -653,7 +654,7 @@ static int tegra_i2c_init(struct tegra_i2c_dev *i2c_dev) i2c_writel(i2c_dev, val, I2C_CNFG); i2c_writel(i2c_dev, 0, I2C_INT_MASK); - if (i2c_dev->is_vi) + if (IS_VI(i2c_dev)) tegra_i2c_vi_init(i2c_dev); switch (t->bus_freq_hz) { @@ -705,7 +706,7 @@ static int tegra_i2c_init(struct tegra_i2c_dev *i2c_dev) return err; } - if (!IS_DVC(i2c_dev) && !i2c_dev->is_vi) { + if (!IS_DVC(i2c_dev) && !IS_VI(i2c_dev)) { u32 sl_cfg = i2c_readl(i2c_dev, I2C_SL_CNFG); sl_cfg |= I2C_SL_CNFG_NACK | I2C_SL_CNFG_NEWSL; @@ -848,7 +849,7 @@ static int tegra_i2c_fill_tx_fifo(struct tegra_i2c_dev *i2c_dev) i2c_dev->msg_buf_remaining = buf_remaining; i2c_dev->msg_buf = buf + words_to_transfer * BYTES_PER_FIFO_WORD; - if (i2c_dev->is_vi) + if (IS_VI(i2c_dev)) i2c_writesl_vi(i2c_dev, buf, I2C_TX_FIFO, words_to_transfer); else i2c_writesl(i2c_dev, buf, I2C_TX_FIFO, words_to_transfer); @@ -1656,7 +1657,9 @@ static const struct tegra_i2c_hw_feature tegra194_i2c_hw = { static const struct of_device_id tegra_i2c_of_match[] = { { .compatible = "nvidia,tegra194-i2c", .data = &tegra194_i2c_hw, }, { .compatible = "nvidia,tegra186-i2c", .data = &tegra186_i2c_hw, }, +#if IS_ENABLED(CONFIG_ARCH_TEGRA_210_SOC) { .compatible = "nvidia,tegra210-i2c-vi", .data = &tegra210_i2c_hw, }, +#endif { .compatible = "nvidia,tegra210-i2c", .data = &tegra210_i2c_hw, }, { .compatible = "nvidia,tegra124-i2c", .data = &tegra124_i2c_hw, }, { .compatible = "nvidia,tegra114-i2c", .data = &tegra114_i2c_hw, }, @@ -1683,7 +1686,8 @@ static void tegra_i2c_parse_dt(struct tegra_i2c_dev *i2c_dev) of_device_is_compatible(np, "nvidia,tegra20-i2c-dvc")) i2c_dev->is_dvc = true; - if (of_device_is_compatible(np, "nvidia,tegra210-i2c-vi")) + if (IS_ENABLED(CONFIG_ARCH_TEGRA_210_SOC) && + of_device_is_compatible(np, "nvidia,tegra210-i2c-vi")) i2c_dev->is_vi = true; } @@ -1712,7 +1716,7 @@ static int tegra_i2c_init_clocks(struct tegra_i2c_dev *i2c_dev) if (i2c_dev->hw == &tegra20_i2c_hw || i2c_dev->hw == &tegra30_i2c_hw) i2c_dev->clocks[i2c_dev->nclocks++].id = "fast-clk"; - if (i2c_dev->is_vi) + if (IS_VI(i2c_dev)) i2c_dev->clocks[i2c_dev->nclocks++].id = "slow"; err = devm_clk_bulk_get(i2c_dev->dev, i2c_dev->nclocks, @@ -1830,7 +1834,7 @@ static int tegra_i2c_probe(struct platform_device *pdev) * VI I2C device shouldn't be marked as IRQ-safe because VI I2C won't * be used for atomic transfers. */ - if (!i2c_dev->is_vi) + if (!IS_VI(i2c_dev)) pm_runtime_irq_safe(i2c_dev->dev); pm_runtime_enable(i2c_dev->dev); @@ -1904,7 +1908,7 @@ static int __maybe_unused tegra_i2c_runtime_resume(struct device *dev) * power ON/OFF during runtime PM resume/suspend, meaning that * controller needs to be re-initialized after power ON. */ - if (i2c_dev->is_vi) { + if (IS_VI(i2c_dev)) { err = tegra_i2c_init(i2c_dev); if (err) goto disable_clocks;