Le mar. 28 juil. 2020 à 11:21, Krzysztof Kozlowski <k...@kernel.org> a
écrit :
On Mon, Jul 27, 2020 at 06:20:34PM +0200, Paul Cercueil wrote:
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 <h...@goldelico.com>
Signed-off-by: Paul Cercueil <p...@crapouillou.net>
---
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));
Shouldn't you map only 0x54 size as well?
I can do that.
Cheers,
-Paul
