Messages in this thread Patch in this message |  | | From | Paul Cercueil <> | Subject | [PATCH RESEND] memory: jz4780_nemc: Only request IO memory the driver will use | Date | Thu, 23 Jul 2020 11:04:14 +0200 |
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The driver only uses the registers up to offset 0x54. 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.
Tested-by: H. Nikolaus Schaller <hns@goldelico.com> Signed-off-by: Paul Cercueil <paul@crapouillou.net> ---
Notes: Thomas: drivers/memory/ has no dedicated maintainer, so sending this patch upstream is like sending a bottle to the sea. Since it touches a driver for a Ingenic SoC, if Greg doesn't take it (I don't blame him - he's a busy man), could you take it in your tree? Thanks, -Paul
drivers/memory/jz4780-nemc.c | 15 ++++++++++++++- 1 file changed, 14 insertions(+), 1 deletion(-)
diff --git a/drivers/memory/jz4780-nemc.c b/drivers/memory/jz4780-nemc.c index b232ed279fc3..647267ea8c63 100644 --- a/drivers/memory/jz4780-nemc.c +++ b/drivers/memory/jz4780-nemc.c @@ -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> @@ -288,7 +289,19 @@ 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 only uses the registers up to offset 0x54. 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, 0x54, dev_name(dev))) { + dev_err(dev, "unable to request I/O memory region\n"); + return -EBUSY; + } + + nemc->base = devm_ioremap(dev, res->start, resource_size(res)); if (IS_ERR(nemc->base)) { dev_err(dev, "failed to get I/O memory\n"); return PTR_ERR(nemc->base); -- 2.27.0
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