memory: jz4780_nemc: Only request IO memory the driver will use (f046e4a3) · Commits · 戴 / test

drivers/memory/jz4780-nemc.c

+16 −1

Original line number	Diff line number	Diff line
		@@ -8,6 +8,7 @@

		#include <linux/clk.h>
		#include <linux/init.h>
		#include <linux/io.h>
		#include <linux/math64.h>
		#include <linux/of.h>
		#include <linux/of_address.h>
		@@ -22,6 +23,8 @@
		#define NEMC_SMCRn(n) (0x14 + (((n) - 1) * 4))
		#define NEMC_NFCSR 0x50

		#define NEMC_REG_LEN 0x54

		#define NEMC_SMCR_SMT BIT(0)
		#define NEMC_SMCR_BW_SHIFT 6
		#define NEMC_SMCR_BW_MASK (0x3 << NEMC_SMCR_BW_SHIFT)
		@@ -288,7 +291,19 @@ static int jz4780_nemc_probe(struct platform_device *pdev)
		nemc->dev = dev;

		res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
		nemc->base = devm_ioremap_resource(dev, res);

		/*
		* The driver currently only uses the registers up to offset
		* NEMC_REG_LEN. Since the EFUSE registers are in the middle of the
		* NEMC registers, we only request the registers we will use for now;
		* that way the EFUSE driver can probe too.
		*/
		if (!devm_request_mem_region(dev, res->start, NEMC_REG_LEN, dev_name(dev))) {
		dev_err(dev, "unable to request I/O memory region\n");
		return -EBUSY;
		}

		nemc->base = devm_ioremap(dev, res->start, NEMC_REG_LEN);
		if (IS_ERR(nemc->base)) {
		dev_err(dev, "failed to get I/O memory\n");
		return PTR_ERR(nemc->base);