From patchwork Fri Aug 21 14:42:40 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Grzegorz Jaszczyk X-Patchwork-Id: 11729635 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 88D0E722 for ; Fri, 21 Aug 2020 14:45:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7278521775 for ; Fri, 21 Aug 2020 14:45:23 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="O/rp+j/m" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727982AbgHUOpW (ORCPT ); Fri, 21 Aug 2020 10:45:22 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46684 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727817AbgHUOo3 (ORCPT ); Fri, 21 Aug 2020 10:44:29 -0400 Received: from mail-lj1-x242.google.com (mail-lj1-x242.google.com [IPv6:2a00:1450:4864:20::242]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1B25DC061755 for ; Fri, 21 Aug 2020 07:44:28 -0700 (PDT) Received: by mail-lj1-x242.google.com with SMTP id v4so2156908ljd.0 for ; Fri, 21 Aug 2020 07:44:28 -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=3iZtNbqc1mBJJJjWeSLbgS2Cn5Da5RL7AKHBFy+181Q=; b=O/rp+j/mkB/qPlnoIM4brPw7wKuHchbCzNlJAK9refknfOTqNp8S9SD94tcBhaAaGU bvr+qINvuhsIjJjWcYElzw5nzGWCK6eBylvqlAaH/EgtKke/80kgCrfzN/iClSfG7QW+ C8TkYjtUI7o6dO1RJl1g8cushOqXEEVsKRBaFOfFFMgTc8T+n/FYRNrWbsPGYotewsaW upa0na5T5n/UxA1j7i3XjAYfdoZeEaVLFYqQyuD9/hUIg8eYPl+FZ1EDQQWyxTpvDmkl frhhwbgUK2oRmpMhqlja8ogqUpVMP4t4gvY/Cl2cA4BI+R34usSfTZCaIbqvGkq8j+QZ YNhw== 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=3iZtNbqc1mBJJJjWeSLbgS2Cn5Da5RL7AKHBFy+181Q=; b=V/gWvh7+XA8MhIlfbkwBM44ra8kGqX8ZCOTYT085YOKGGWDtMSC22xtde0S36MRN6k X0ynzRKsBH7QJx4In4+jkll+rTFm+C/o68X9/sWN0f0fOJpV9GhDJyNttvnJYXaTb0Ei iwPdq+eDAct14LHXtWMYtA8fMfiQ/X+mWg9eGwp53i2BYC7XsKp7ntnSwhBskbK0XXox C3c8DJxaPc0IJgDR9uT36nnXD3Kd48jY2+tPdXz0F0cfrvlaMc3VzeCf5GFxTpA+6x12 1Yx7om6tqQWRSxUs1TFa5M85pdT+rKcV6k0fWvPcy/4O/Z4JvwaYVBt0q2CseeMJW6XC sNgQ== X-Gm-Message-State: AOAM533YGpP7NYx78ZJYNiNRTe6fLyp1/sLxnxSZNp227//oM4rk9wQn m6oPzbzpjHrfsvErV0Shd8K5uw== X-Google-Smtp-Source: ABdhPJx1dh3XKL1n3kASOWvLKD/q4ylgbtRjFmMJei1J6JhlNOHQME7Fbz/tJ31RLYgisdtynECWtg== X-Received: by 2002:a2e:a586:: with SMTP id m6mr1793847ljp.458.1598021066514; Fri, 21 Aug 2020 07:44:26 -0700 (PDT) Received: from gilgamesh.semihalf.com (193-106-246-138.noc.fibertech.net.pl. [193.106.246.138]) by smtp.gmail.com with ESMTPSA id u10sm425301lfo.39.2020.08.21.07.44.25 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Fri, 21 Aug 2020 07:44:26 -0700 (PDT) From: Grzegorz Jaszczyk To: ssantosh@kernel.org, s-anna@ti.com Cc: grzegorz.jaszczyk@linaro.org, santosh.shilimkar@oracle.com, robh+dt@kernel.org, lee.jones@linaro.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-omap@vger.kernel.org, linux-arm-kernel@lists.infradead.org, praneeth@ti.com, tony@atomide.com, "Andrew F . Davis" Subject: [PATCH v2 3/7] soc: ti: pruss: Add support for PRU-ICSSs on AM437x SoCs Date: Fri, 21 Aug 2020 16:42:40 +0200 Message-Id: <1598020964-29877-4-git-send-email-grzegorz.jaszczyk@linaro.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1598020964-29877-1-git-send-email-grzegorz.jaszczyk@linaro.org> References: <1598020964-29877-1-git-send-email-grzegorz.jaszczyk@linaro.org> Sender: linux-omap-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org From: Suman Anna The AM437x SoCs have two different PRU-ICSS subsystems: PRU-ICSS1 and a smaller PRU-ICSS0. Enhance the PRUSS platform driver to support both the PRU-ICSS sub-systems on these SoCs. The PRU-ICSS1 on AM437x is very similar to the PRU-ICSS on AM33xx except for few minor differences - increased Instruction RAM, increased Shared Data RAM2, and 1 less interrupt (PRUSS host interrupt 7 which is redirected to the other PRUSS) towards the MPU INTC. The PRU-ICSS0 is a cut-down version of the IP, with less DRAM per PRU, no Shared DRAM etc. It also does not have direct access to L3 bus regions, there is a single interface to L3 for both PRUSS0 and PRUSS1, and it would have to go through the PRUSS1's interface. The PRUSS_SYSCFG register is reserved on PRUSS0, so any external access requires the programming the corresponding PRUSS_SYSCFG register in PRUSS1. It does have its own dedicated I/O lines though. Note that this instance does not support any PRU Ethernet related use cases. The adaptation uses SoC-specific compatibles in the driver and uses a newly introduced pruss_match_private_data structure and the pruss_get_private_data() function to retrieve a PRUSS instance specific data using a device-name based lookup logic. The reset and the L3 external access are managed by the parent interconnect ti-sysc bus driver so that PRUSS1 and PRUSS0 can be independently supported. Signed-off-by: Suman Anna Signed-off-by: Andrew F. Davis Signed-off-by: Grzegorz Jaszczyk --- v1->v2: - No changes. --- drivers/soc/ti/Kconfig | 2 +- drivers/soc/ti/pruss.c | 35 ++++++++++++++++++++++++++++++++++- 2 files changed, 35 insertions(+), 2 deletions(-) diff --git a/drivers/soc/ti/Kconfig b/drivers/soc/ti/Kconfig index b934bc3..40d6a22 100644 --- a/drivers/soc/ti/Kconfig +++ b/drivers/soc/ti/Kconfig @@ -103,7 +103,7 @@ config TI_K3_SOCINFO config TI_PRUSS tristate "TI PRU-ICSS Subsystem Platform drivers" - depends on SOC_AM33XX + depends on SOC_AM33XX || SOC_AM43XX select MFD_SYSCON help TI PRU-ICSS Subsystem platform specific support. diff --git a/drivers/soc/ti/pruss.c b/drivers/soc/ti/pruss.c index c071bb2..04938ba 100644 --- a/drivers/soc/ti/pruss.c +++ b/drivers/soc/ti/pruss.c @@ -17,6 +17,14 @@ #include #include +/** + * struct pruss_private_data - PRUSS driver private data + * @has_no_sharedram: flag to indicate the absence of PRUSS Shared Data RAM + */ +struct pruss_private_data { + bool has_no_sharedram; +}; + static int pruss_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; @@ -25,8 +33,15 @@ static int pruss_probe(struct platform_device *pdev) struct pruss *pruss; struct resource res; int ret, i, index; + const struct pruss_private_data *data; const char *mem_names[PRUSS_MEM_MAX] = { "dram0", "dram1", "shrdram2" }; + data = of_device_get_match_data(&pdev->dev); + if (IS_ERR(data)) { + dev_err(dev, "missing private data\n"); + return -ENODEV; + } + ret = dma_set_coherent_mask(dev, DMA_BIT_MASK(32)); if (ret) { dev_err(dev, "failed to set the DMA coherent mask"); @@ -45,7 +60,14 @@ static int pruss_probe(struct platform_device *pdev) return -ENODEV; } - for (i = 0; i < ARRAY_SIZE(mem_names); i++) { + for (i = 0; i < PRUSS_MEM_MAX; i++) { + /* + * On AM437x one of two PRUSS units don't contain Shared RAM, + * skip it + */ + if (data && data->has_no_sharedram && i == PRUSS_MEM_SHRD_RAM2) + continue; + index = of_property_match_string(child, "reg-names", mem_names[i]); if (index < 0) { @@ -126,8 +148,19 @@ static int pruss_remove(struct platform_device *pdev) return 0; } +/* instance-specific driver private data */ +static const struct pruss_private_data am437x_pruss1_data = { + .has_no_sharedram = false, +}; + +static const struct pruss_private_data am437x_pruss0_data = { + .has_no_sharedram = true, +}; + static const struct of_device_id pruss_of_match[] = { { .compatible = "ti,am3356-pruss" }, + { .compatible = "ti,am4376-pruss0", .data = &am437x_pruss0_data, }, + { .compatible = "ti,am4376-pruss1", .data = &am437x_pruss1_data, }, {}, }; MODULE_DEVICE_TABLE(of, pruss_of_match);