[PATCH v4] bus: imx-weim: support CS GPR configuration
From: Shawn Guo <hidden>
Date: 2014-02-16 14:31:16
Also in:
linux-devicetree
On Sun, Feb 16, 2014 at 06:22:44PM +0400, Alexander Shiyan wrote:
???????????, 16 ??????? 2014, 22:03 +08:00 ?? Shawn Guo [off-list ref]:quoted
For imx50-weim and imx6q-weim type of devices, there might a WEIM CS space configuration register in General Purpose Register controller, e.g. IOMUXC_GPR1 on i.MX6Q....quoted
+static int __init imx_weim_gpr_setup(struct platform_device *pdev) +{ + struct device_node *np = pdev->dev.of_node; + struct property *prop; + const __be32 *p; + struct regmap *gpr; + u32 gprvals[4] = { + 05, /* CS0(128M) CS1(0M) CS2(0M) CS3(0M) */ + 033, /* CS0(64M) CS1(64M) CS2(0M) CS3(0M) */ + 0113, /* CS0(64M) CS1(32M) CS2(32M) CS3(0M) */ + 01111, /* CS0(64M) CS1(32M) CS2(32M) CS3(0M) */ + }; + u32 gprval = 0; + u32 val; + int cs = 0; + int i = 0; + + gpr = syscon_regmap_lookup_by_phandle(np, "fsl,weim-cs-gpr"); + if (IS_ERR(gpr)) { + dev_dbg(&pdev->dev, "failed to find weim-cs-gpr\n"); + return 0;Only one comment: You do not use these error codes in the probe(), so let's declare this function as void.
Oh, yes. I should check return of imx_weim_gpr_setup() in probe(). Will add in the next version. Shawn