Re: [PATCH 1/3] arm: socfpga: Enable ECC of L2 and OCRAM on startup.

On 10/04/2014 11:21 PM, Masami Hiramatsu wrote:

(2014/10/02 1:31), tthayer-yzvPICuk2ABMcg4IHK0kFoH6Mc4MB0Vx@public.gmane.org wrote:

quoted

+void socfpga_init_ocram_ecc(void)
+{
+	struct device_node *np;
+	const __be32 *prop;
+	u32 ocr_edac_addr, iram_addr, len;
+	void __iomem  *mapped_ocr_edac_addr;
+	size_t size;
+	struct gen_pool *gp;
+
+	np = of_find_compatible_node(NULL, NULL, "altr,ocram-edac");
+	if (!np) {
+		pr_err("SOCFPGA: Unable to find altr,ocram-edac in dtb\n");
+		return;
+	}
+
+	prop = of_get_property(np, "reg", &size);
+	ocr_edac_addr = be32_to_cpup(prop++);
+	len = be32_to_cpup(prop);
+	if (!prop || size < sizeof(*prop)) {
+		pr_err("SOCFPGA: Unable to find OCRAM ECC mapping in dtb\n");
+		return;
+	}
+
+	gp = of_get_named_gen_pool(np, "iram", 0);
+	if (!gp) {
+		pr_err("SOCFPGA: OCRAM cannot find gen pool\n");
+		return;
+	}
+
+	np = of_find_compatible_node(NULL, NULL, "mmio-sram");
+	if (!np) {
+		pr_err("SOCFPGA: Unable to find mmio-sram in dtb\n");
+		return;
+	}
+	/* Determine the OCRAM address and size */
+	prop = of_get_property(np, "reg", &size);
+	iram_addr = be32_to_cpup(prop++);
+	len = be32_to_cpup(prop);
+
+	if (!prop || size < sizeof(*prop)) {
+		pr_err("SOCFPGA: Unable to find OCRAM mapping in dtb\n");
+		return;
+	}
+
+	iram_addr = gen_pool_alloc(gp, len);
+	if (iram_addr == 0) {
+		pr_err("SOCFPGA: cannot alloc from gen pool\n");
+		return;
+	}
+
+	memset((void *)iram_addr, 0, len);
+
+	mapped_ocr_edac_addr = ioremap(ocr_edac_addr, 4);
+
+	gen_pool_free(gp, iram_addr, len);
+
+	/* Clear any pending OCRAM ECC interrupts, then enable ECC */
+	writel(0x18, mapped_ocr_edac_addr);
+	writel(0x19, mapped_ocr_edac_addr);

Should we better iounmap() here?
It seems no one can use mapped_ocr_edac_addr afterwords.

Yes, I will make this change. Thank you!

quoted

+
+	pr_debug("SOCFPGA: Success Initializing OCRAM\n");
+}
+

Thank you,

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