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bh=0YO9X8JrVMhxS3C8ry3P1NpNE6uCJVJpb/vpFCRQayg=; b=jWfOUUHFF7c9k5p4sPSVyD9XLjArQfx27UgcLJHPDBYHYxUD492PPsYhkfSLEhOaZh tVqd+x6bPP4xsY8JnPHX6LLjK5DcC2U9qPFVSPYDSy7uVZb7fjJWJviPU+ThlDZeLajd b5dDcJhx2tpA5+OVdK7Bana1S3WmpYfC8e2GlfA1Pgq7xR0UxbWzqgb3Xff24qEyazYs H+T1OyY1xaIfMHTU1gl2R0ba88HTuVVTY399+6SQhSLXbDvHmWj25Enr3dcEG7J4L8Fw LY0QjqvzNNjInoxDYDj0xF8v9O2vTUqE95Hs+73/04aU+m4pmjK2mb2dlFA9kFm5UDkR xvOg== X-Gm-Message-State: APjAAAXJCdEqFCbDDEyWMCl6e+OmCThhsemtECuNS6q1J2HaSVivWKvL IIO0Fk2IXOCENFveXgQtpMk= X-Google-Smtp-Source: APXvYqxL6GxakGiydUYH7NlDpEoU/Uu55hmMkr19MRFB1ktpzJaP36AAZU5i0ateJw4T+t+kQFk8tg== X-Received: by 2002:a5d:8702:: with SMTP id u2mr13323425iom.228.1562964201758; Fri, 12 Jul 2019 13:43:21 -0700 (PDT) Received: from localhost.localdomain ([198.52.185.227]) by smtp.gmail.com with ESMTPSA id l14sm9725013iob.1.2019.07.12.13.43.20 (version=TLS1_3 cipher=AEAD-AES256-GCM-SHA384 bits=256/256); Fri, 12 Jul 2019 13:43:21 -0700 (PDT) From: Sven Van Asbroeck X-Google-Original-From: Sven Van Asbroeck To: Shawn Guo , Rob Herring Subject: [PATCH 1/2] bus: imx-weim: optionally enable burst clock mode Date: Fri, 12 Jul 2019 16:43:15 -0400 Message-Id: <20190712204316.16783-1-TheSven73@gmail.com> X-Mailer: git-send-email 2.17.1 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190712_134324_509983_C522CFFF X-CRM114-Status: GOOD ( 12.35 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , devicetree@vger.kernel.org, Kees Cook , Arnd Bergmann , Sascha Hauer , linux-kernel@vger.kernel.org, NXP Linux Team , Pengutronix Kernel Team , Fabio Estevam , linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP To enable burst clock mode, add the fsl,burst-clk-enable property to the weim bus's devicetree node. Example: weim: weim@21b8000 { compatible = "fsl,imx6q-weim"; reg = <0x021b8000 0x4000>; clocks = <&clks 196>; #address-cells = <2>; #size-cells = <1>; ranges = <0 0 0x08000000 0x08000000>; fsl,weim-cs-gpr = <&gpr>; fsl,burst-clk-enable; client-device@0,0 { compatible = "something"; reg = <0 0 0x02000000>; #address-cells = <1>; #size-cells = <1>; bank-width = <2>; fsl,weim-cs-timing = <0x00620081 0x00000001 0x1c022000 0x0000c000 0x1404a38e 0x00000000>; }; }; Signed-off-by: Sven Van Asbroeck Reviewed-by: Fabio Estevam --- drivers/bus/imx-weim.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/drivers/bus/imx-weim.c b/drivers/bus/imx-weim.c index db74334ca5ef..cb7d5504a22a 100644 --- a/drivers/bus/imx-weim.c +++ b/drivers/bus/imx-weim.c @@ -19,6 +19,8 @@ struct imx_weim_devtype { unsigned int cs_count; unsigned int cs_regs_count; unsigned int cs_stride; + unsigned int wcr_offset; + unsigned int wcr_bcm; }; static const struct imx_weim_devtype imx1_weim_devtype = { @@ -37,6 +39,8 @@ static const struct imx_weim_devtype imx50_weim_devtype = { .cs_count = 4, .cs_regs_count = 6, .cs_stride = 0x18, + .wcr_offset = 0x90, + .wcr_bcm = BIT(0), }; static const struct imx_weim_devtype imx51_weim_devtype = { @@ -192,6 +196,7 @@ static int __init weim_parse_dt(struct platform_device *pdev, struct device_node *child; int ret, have_child = 0; struct cs_timing_state ts = {}; + u32 reg; if (devtype == &imx50_weim_devtype) { ret = imx_weim_gpr_setup(pdev); @@ -199,6 +204,17 @@ static int __init weim_parse_dt(struct platform_device *pdev, return ret; } + if (of_property_read_bool(pdev->dev.of_node, "fsl,burst-clk-enable")) { + if (devtype->wcr_bcm) { + reg = readl(base + devtype->wcr_offset); + writel(reg | devtype->wcr_bcm, + base + devtype->wcr_offset); + } else { + dev_err(&pdev->dev, "burst clk mode not supported.\n"); + return -EINVAL; + } + } + for_each_available_child_of_node(pdev->dev.of_node, child) { ret = weim_timing_setup(&pdev->dev, child, base, devtype, &ts); if (ret)