Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750869AbcLBPjb (ORCPT ); Fri, 2 Dec 2016 10:39:31 -0500 Received: from mail-wm0-f42.google.com ([74.125.82.42]:37712 "EHLO mail-wm0-f42.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751804AbcLBPj1 (ORCPT ); Fri, 2 Dec 2016 10:39:27 -0500 From: Bartosz Golaszewski To: Kevin Hilman , Michael Turquette , Sekhar Nori , Peter Ujfalusi , Russell King , Viresh Kumar , Boris Brezillon , "Rafael J. Wysocki" , Richard Weinberger , David Woodhouse , Brian Norris , Marek Vasut , Cyrille Pitchen Cc: LKML , arm-soc , linux-pm@vger.kernel.org, Bartosz Golaszewski Subject: [PATCH v2 1/3] ARM: da850: fix infinite loop in clk_set_rate() Date: Fri, 2 Dec 2016 16:38:52 +0100 Message-Id: <1480693134-31324-2-git-send-email-bgolaszewski@baylibre.com> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1480693134-31324-1-git-send-email-bgolaszewski@baylibre.com> References: <1480693134-31324-1-git-send-email-bgolaszewski@baylibre.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1868 Lines: 54 The aemif clock is added twice to the lookup table in da850.c. This breaks the children list of pll0_sysclk3 as we're using the same list links in struct clk. When calling clk_set_rate(), we get stuck in propagate_rate(). Create a separate clock for nand, inheriting the rate of the aemif clock and retrieve it in the davinci_nand module. Signed-off-by: Bartosz Golaszewski --- arch/arm/mach-davinci/da850.c | 7 ++++++- drivers/mtd/nand/davinci_nand.c | 2 +- 2 files changed, 7 insertions(+), 2 deletions(-) diff --git a/arch/arm/mach-davinci/da850.c b/arch/arm/mach-davinci/da850.c index e770c97..1fcc986 100644 --- a/arch/arm/mach-davinci/da850.c +++ b/arch/arm/mach-davinci/da850.c @@ -367,6 +367,11 @@ static struct clk aemif_clk = { .flags = ALWAYS_ENABLED, }; +static struct clk nand_clk = { + .name = "nand", + .parent = &aemif_clk, +}; + static struct clk usb11_clk = { .name = "usb11", .parent = &pll0_sysclk4, @@ -537,7 +542,7 @@ static struct clk_lookup da850_clks[] = { CLK("da830-mmc.0", NULL, &mmcsd0_clk), CLK("da830-mmc.1", NULL, &mmcsd1_clk), CLK("ti-aemif", NULL, &aemif_clk), - CLK(NULL, "aemif", &aemif_clk), + CLK(NULL, "nand", &nand_clk), CLK("ohci-da8xx", "usb11", &usb11_clk), CLK("musb-da8xx", "usb20", &usb20_clk), CLK("spi_davinci.0", NULL, &spi0_clk), diff --git a/drivers/mtd/nand/davinci_nand.c b/drivers/mtd/nand/davinci_nand.c index 27fa8b8..5857d06 100644 --- a/drivers/mtd/nand/davinci_nand.c +++ b/drivers/mtd/nand/davinci_nand.c @@ -694,7 +694,7 @@ static int nand_davinci_probe(struct platform_device *pdev) ret = -EINVAL; - info->clk = devm_clk_get(&pdev->dev, "aemif"); + info->clk = devm_clk_get(&pdev->dev, "nand"); if (IS_ERR(info->clk)) { ret = PTR_ERR(info->clk); dev_dbg(&pdev->dev, "unable to get AEMIF clock, err %d\n", ret); -- 2.9.3