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* [PATCH v10 0/4] add support for FRAM
@ 2021-06-11  9:45 Jiri Prchal
  2021-06-11  9:45 ` [PATCH v10 1/4] nvmem: prepare basics for FRAM support Jiri Prchal
                   ` (4 more replies)
  0 siblings, 5 replies; 10+ messages in thread
From: Jiri Prchal @ 2021-06-11  9:45 UTC (permalink / raw)
  To: devicetree, linux-kernel
  Cc: Rob Herring, Christian Eggers, Arnd Bergmann, Greg Kroah-Hartman,
	Jiri Prchal

Adds support for Cypress FRAMs.

Jiri Prchal (4):
  nvmem: prepare basics for FRAM support
  nvmem: eeprom: at25: add support for FRAM
  dt-bindings: nvmem: at25: add for FRAM support
  nvmem: eeprom: at25: export FRAM serial num

 .../ABI/testing/sysfs-class-spi-eeprom        |  19 +++
 .../devicetree/bindings/eeprom/at25.yaml      |  31 +++-
 drivers/misc/eeprom/Kconfig                   |   5 +-
 drivers/misc/eeprom/at25.c                    | 161 ++++++++++++++----
 drivers/nvmem/core.c                          |   4 +
 include/linux/nvmem-provider.h                |   1 +
 6 files changed, 183 insertions(+), 38 deletions(-)
 create mode 100644 Documentation/ABI/testing/sysfs-class-spi-eeprom

-- 
2.25.1


^ permalink raw reply	[flat|nested] 10+ messages in thread

* [PATCH v10 1/4] nvmem: prepare basics for FRAM support
  2021-06-11  9:45 [PATCH v10 0/4] add support for FRAM Jiri Prchal
@ 2021-06-11  9:45 ` Jiri Prchal
  2021-06-11  9:45 ` [PATCH v10 2/4] nvmem: eeprom: at25: add support for FRAM Jiri Prchal
                   ` (3 subsequent siblings)
  4 siblings, 0 replies; 10+ messages in thread
From: Jiri Prchal @ 2021-06-11  9:45 UTC (permalink / raw)
  To: devicetree, linux-kernel
  Cc: Rob Herring, Christian Eggers, Arnd Bergmann, Greg Kroah-Hartman,
	Jiri Prchal

Added enum and string for FRAM (ferroelectric RAM) to expose it as file
named "fram".
Added documentation of sysfs file.

Signed-off-by: Jiri Prchal <jiri.prchal@aksignal.cz>
---
v2: no change here
v3: resend and added more recipients
v4: resend
v5: no change here
v6: changed commit subject
v7: no change here
v8: changed subject
v9: no change here
v10: moved documentation to here
---
 Documentation/ABI/testing/sysfs-class-spi-eeprom | 8 ++++++++
 drivers/nvmem/core.c                             | 4 ++++
 include/linux/nvmem-provider.h                   | 1 +
 3 files changed, 13 insertions(+)
 create mode 100644 Documentation/ABI/testing/sysfs-class-spi-eeprom

diff --git a/Documentation/ABI/testing/sysfs-class-spi-eeprom b/Documentation/ABI/testing/sysfs-class-spi-eeprom
new file mode 100644
index 000000000000..7447e242d415
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-class-spi-eeprom
@@ -0,0 +1,8 @@
+What:		/sys/class/spi_master/spi<bus>/spi<bus>.<dev>/fram
+Date:		June 2021
+KernelVersion:	5.14
+Contact:	Jiri Prchal <jiri.prchal@aksignal.cz>
+Description:
+	Contains the FRAM binary data. Same as EEPROM, just another file
+	name to indicate that it employs ferroelectric process.
+	It performs write operations at bus speed - no write delays.
diff --git a/drivers/nvmem/core.c b/drivers/nvmem/core.c
index 177f5bf27c6d..01ef9a934b0a 100644
--- a/drivers/nvmem/core.c
+++ b/drivers/nvmem/core.c
@@ -180,6 +180,7 @@ static const char * const nvmem_type_str[] = {
 	[NVMEM_TYPE_EEPROM] = "EEPROM",
 	[NVMEM_TYPE_OTP] = "OTP",
 	[NVMEM_TYPE_BATTERY_BACKED] = "Battery backed",
+	[NVMEM_TYPE_FRAM] = "FRAM",
 };
 
 #ifdef CONFIG_DEBUG_LOCK_ALLOC
@@ -359,6 +360,9 @@ static int nvmem_sysfs_setup_compat(struct nvmem_device *nvmem,
 	if (!config->base_dev)
 		return -EINVAL;
 
+	if (config->type == NVMEM_TYPE_FRAM)
+		bin_attr_nvmem_eeprom_compat.attr.name = "fram";
+
 	nvmem->eeprom = bin_attr_nvmem_eeprom_compat;
 	nvmem->eeprom.attr.mode = nvmem_bin_attr_get_umode(nvmem);
 	nvmem->eeprom.size = nvmem->size;
diff --git a/include/linux/nvmem-provider.h b/include/linux/nvmem-provider.h
index e162b757b6d5..890003565761 100644
--- a/include/linux/nvmem-provider.h
+++ b/include/linux/nvmem-provider.h
@@ -25,6 +25,7 @@ enum nvmem_type {
 	NVMEM_TYPE_EEPROM,
 	NVMEM_TYPE_OTP,
 	NVMEM_TYPE_BATTERY_BACKED,
+	NVMEM_TYPE_FRAM,
 };
 
 #define NVMEM_DEVID_NONE	(-1)
-- 
2.25.1


^ permalink raw reply	[flat|nested] 10+ messages in thread

* [PATCH v10 2/4] nvmem: eeprom: at25: add support for FRAM
  2021-06-11  9:45 [PATCH v10 0/4] add support for FRAM Jiri Prchal
  2021-06-11  9:45 ` [PATCH v10 1/4] nvmem: prepare basics for FRAM support Jiri Prchal
@ 2021-06-11  9:45 ` Jiri Prchal
  2021-06-16 18:59   ` kernel test robot
  2021-06-22  7:44   ` kernel test robot
  2021-06-11  9:46 ` [PATCH v10 3/4] dt-bindings: nvmem: at25: add for FRAM support Jiri Prchal
                   ` (2 subsequent siblings)
  4 siblings, 2 replies; 10+ messages in thread
From: Jiri Prchal @ 2021-06-11  9:45 UTC (permalink / raw)
  To: devicetree, linux-kernel
  Cc: Rob Herring, Christian Eggers, Arnd Bergmann, Greg Kroah-Hartman,
	Jiri Prchal, kernel test robot

Added support for Cypress FRAMs FM25V[N]*.
These frams have ID and some of them have serial number too.
Size of them is recognized by ID. They don't have pages, it could
be read or written at once, but it's limited in this driver to
io limit 4096.

Signed-off-by: Jiri Prchal <jiri.prchal@aksignal.cz>
---
v2: fixed warning at %zd at int
Reported-by: kernel test robot <lkp@intel.com>
v3: resend and added more recipients
v4: resend
v5: used in-kernel function int_pow
v6: no change here
v7: moved definition of sernum size to patch 4
v8: changed buffer type to u8
v9: removed needless has_sernum
v10: removed double cast, added types of FRAM
---
 drivers/misc/eeprom/Kconfig |   5 +-
 drivers/misc/eeprom/at25.c  | 134 ++++++++++++++++++++++++++++--------
 2 files changed, 107 insertions(+), 32 deletions(-)

diff --git a/drivers/misc/eeprom/Kconfig b/drivers/misc/eeprom/Kconfig
index 0f791bfdc1f5..f0a7531f354c 100644
--- a/drivers/misc/eeprom/Kconfig
+++ b/drivers/misc/eeprom/Kconfig
@@ -32,12 +32,13 @@ config EEPROM_AT24
 	  will be called at24.
 
 config EEPROM_AT25
-	tristate "SPI EEPROMs from most vendors"
+	tristate "SPI EEPROMs (FRAMs) from most vendors"
 	depends on SPI && SYSFS
 	select NVMEM
 	select NVMEM_SYSFS
 	help
-	  Enable this driver to get read/write support to most SPI EEPROMs,
+	  Enable this driver to get read/write support to most SPI EEPROMs
+	  and Cypress FRAMs,
 	  after you configure the board init code to know about each eeprom
 	  on your target board.
 
diff --git a/drivers/misc/eeprom/at25.c b/drivers/misc/eeprom/at25.c
index b76e4901b4a4..6ac2ddfd6833 100644
--- a/drivers/misc/eeprom/at25.c
+++ b/drivers/misc/eeprom/at25.c
@@ -1,6 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * at25.c -- support most SPI EEPROMs, such as Atmel AT25 models
+ *	     and Cypress FRAMs FM25 models
  *
  * Copyright (C) 2006 David Brownell
  */
@@ -16,6 +17,9 @@
 #include <linux/spi/spi.h>
 #include <linux/spi/eeprom.h>
 #include <linux/property.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/math.h>
 
 /*
  * NOTE: this is an *EEPROM* driver.  The vagaries of product naming
@@ -42,6 +46,9 @@ struct at25_data {
 #define	AT25_WRSR	0x01		/* write status register */
 #define	AT25_READ	0x03		/* read byte(s) */
 #define	AT25_WRITE	0x02		/* write byte(s)/sector */
+#define	FM25_SLEEP	0xb9		/* enter sleep mode */
+#define	FM25_RDID	0x9f		/* read device ID */
+#define	FM25_RDSN	0xc3		/* read S/N */
 
 #define	AT25_SR_nRDY	0x01		/* nRDY = write-in-progress */
 #define	AT25_SR_WEN	0x02		/* write enable (latched) */
@@ -51,6 +58,8 @@ struct at25_data {
 
 #define	AT25_INSTR_BIT3	0x08		/* Additional address bit in instr */
 
+#define	FM25_ID_LEN	9		/* ID length */
+
 #define EE_MAXADDRLEN	3		/* 24 bit addresses, up to 2 MBytes */
 
 /* Specs often allow 5 msec for a page write, sometimes 20 msec;
@@ -58,6 +67,9 @@ struct at25_data {
  */
 #define	EE_TIMEOUT	25
 
+#define	IS_EEPROM	0
+#define	IS_FRAM		1
+
 /*-------------------------------------------------------------------------*/
 
 #define	io_limit	PAGE_SIZE	/* bytes */
@@ -129,6 +141,36 @@ static int at25_ee_read(void *priv, unsigned int offset,
 	return status;
 }
 
+/*
+ * read extra registers as ID or serial number
+ */
+static int fm25_aux_read(struct at25_data *at25, u8 *buf, uint8_t command,
+			 int len)
+{
+	int status;
+	struct spi_transfer t[2];
+	struct spi_message m;
+
+	spi_message_init(&m);
+	memset(t, 0, sizeof(t));
+
+	t[0].tx_buf = &command;
+	t[0].len = 1;
+	spi_message_add_tail(&t[0], &m);
+
+	t[1].rx_buf = buf;
+	t[1].len = len;
+	spi_message_add_tail(&t[1], &m);
+
+	mutex_lock(&at25->lock);
+
+	status = spi_sync(at25->spi, &m);
+	dev_dbg(&at25->spi->dev, "read %d aux bytes --> %d\n", len, status);
+
+	mutex_unlock(&at25->lock);
+	return status;
+}
+
 static int at25_ee_write(void *priv, unsigned int off, void *val, size_t count)
 {
 	struct at25_data *at25 = priv;
@@ -303,34 +345,37 @@ static int at25_fw_to_chip(struct device *dev, struct spi_eeprom *chip)
 	return 0;
 }
 
+static const struct of_device_id at25_of_match[] = {
+	{ .compatible = "atmel,at25", .data = (const void *)IS_EEPROM },
+	{ .compatible = "cypress,fm25", .data = (const void *)IS_FRAM },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, at25_of_match);
+
 static int at25_probe(struct spi_device *spi)
 {
 	struct at25_data	*at25 = NULL;
 	struct spi_eeprom	chip;
 	int			err;
 	int			sr;
-	int			addrlen;
+	u8 id[FM25_ID_LEN];
+	const struct of_device_id *match;
+	int is_fram = 0;
+
+	match = of_match_device(of_match_ptr(at25_of_match), &spi->dev);
+	if (match)
+		is_fram = (int)match->data;
 
 	/* Chip description */
 	if (!spi->dev.platform_data) {
-		err = at25_fw_to_chip(&spi->dev, &chip);
-		if (err)
-			return err;
+		if (!is_fram) {
+			err = at25_fw_to_chip(&spi->dev, &chip);
+			if (err)
+				return err;
+		}
 	} else
 		chip = *(struct spi_eeprom *)spi->dev.platform_data;
 
-	/* For now we only support 8/16/24 bit addressing */
-	if (chip.flags & EE_ADDR1)
-		addrlen = 1;
-	else if (chip.flags & EE_ADDR2)
-		addrlen = 2;
-	else if (chip.flags & EE_ADDR3)
-		addrlen = 3;
-	else {
-		dev_dbg(&spi->dev, "unsupported address type\n");
-		return -EINVAL;
-	}
-
 	/* Ping the chip ... the status register is pretty portable,
 	 * unlike probing manufacturer IDs.  We do expect that system
 	 * firmware didn't write it in the past few milliseconds!
@@ -349,9 +394,44 @@ static int at25_probe(struct spi_device *spi)
 	at25->chip = chip;
 	at25->spi = spi;
 	spi_set_drvdata(spi, at25);
-	at25->addrlen = addrlen;
 
-	at25->nvmem_config.type = NVMEM_TYPE_EEPROM;
+	if (is_fram) {
+		/* Get ID of chip */
+		fm25_aux_read(at25, id, FM25_RDID, FM25_ID_LEN);
+		if (id[6] != 0xc2) {
+			dev_err(&spi->dev,
+				"Error: no Cypress FRAM (id %02x)\n", id[6]);
+			return -ENODEV;
+		}
+		/* set size found in ID */
+		if (id[7] < 0x21 || id[7] > 0x26) {
+			dev_err(&spi->dev, "Error: unsupported size (id %02x)\n", id[7]);
+			return -ENODEV;
+		}
+		chip.byte_len = int_pow(2, id[7] - 0x21 + 4) * 1024;
+
+		if (at25->chip.byte_len > 64 * 1024)
+			at25->chip.flags |= EE_ADDR3;
+		else
+			at25->chip.flags |= EE_ADDR2;
+
+		at25->chip.page_size = PAGE_SIZE;
+		strncpy(at25->chip.name, "fm25", sizeof(at25->chip.name));
+	}
+
+	/* For now we only support 8/16/24 bit addressing */
+	if (at25->chip.flags & EE_ADDR1)
+		at25->addrlen = 1;
+	else if (at25->chip.flags & EE_ADDR2)
+		at25->addrlen = 2;
+	else if (at25->chip.flags & EE_ADDR3)
+		at25->addrlen = 3;
+	else {
+		dev_dbg(&spi->dev, "unsupported address type\n");
+		return -EINVAL;
+	}
+
+	at25->nvmem_config.type = is_fram ? NVMEM_TYPE_FRAM : NVMEM_TYPE_EEPROM;
 	at25->nvmem_config.name = dev_name(&spi->dev);
 	at25->nvmem_config.dev = &spi->dev;
 	at25->nvmem_config.read_only = chip.flags & EE_READONLY;
@@ -370,23 +450,17 @@ static int at25_probe(struct spi_device *spi)
 	if (IS_ERR(at25->nvmem))
 		return PTR_ERR(at25->nvmem);
 
-	dev_info(&spi->dev, "%d %s %s eeprom%s, pagesize %u\n",
-		(chip.byte_len < 1024) ? chip.byte_len : (chip.byte_len / 1024),
-		(chip.byte_len < 1024) ? "Byte" : "KByte",
-		at25->chip.name,
-		(chip.flags & EE_READONLY) ? " (readonly)" : "",
-		at25->chip.page_size);
+	dev_info(&spi->dev, "%d %s %s %s%s, pagesize %u\n",
+		 (chip.byte_len < 1024) ? chip.byte_len : (chip.byte_len / 1024),
+		 (chip.byte_len < 1024) ? "Byte" : "KByte",
+		 at25->chip.name, is_fram ? "fram" : "eeprom",
+		 (chip.flags & EE_READONLY) ? " (readonly)" : "",
+		 at25->chip.page_size);
 	return 0;
 }
 
 /*-------------------------------------------------------------------------*/
 
-static const struct of_device_id at25_of_match[] = {
-	{ .compatible = "atmel,at25", },
-	{ }
-};
-MODULE_DEVICE_TABLE(of, at25_of_match);
-
 static struct spi_driver at25_driver = {
 	.driver = {
 		.name		= "at25",
-- 
2.25.1


^ permalink raw reply	[flat|nested] 10+ messages in thread

* [PATCH v10 3/4] dt-bindings: nvmem: at25: add for FRAM support
  2021-06-11  9:45 [PATCH v10 0/4] add support for FRAM Jiri Prchal
  2021-06-11  9:45 ` [PATCH v10 1/4] nvmem: prepare basics for FRAM support Jiri Prchal
  2021-06-11  9:45 ` [PATCH v10 2/4] nvmem: eeprom: at25: add support for FRAM Jiri Prchal
@ 2021-06-11  9:46 ` Jiri Prchal
  2021-06-11  9:46 ` [PATCH v10 4/4] nvmem: eeprom: at25: export FRAM serial num Jiri Prchal
  2021-06-11 10:25 ` [PATCH v10 0/4] add support for FRAM Greg Kroah-Hartman
  4 siblings, 0 replies; 10+ messages in thread
From: Jiri Prchal @ 2021-06-11  9:46 UTC (permalink / raw)
  To: devicetree, linux-kernel
  Cc: Rob Herring, Christian Eggers, Arnd Bergmann, Greg Kroah-Hartman,
	Jiri Prchal, Rob Herring

Added dt binding documentation.

Signed-off-by: Jiri Prchal <jiri.prchal@aksignal.cz>
Reviewed-by: Rob Herring <robh@kernel.org>
---
v2: fixed dt_binding_check warnings thanks to Rob Herring
v3: resend and added more recipients
v4: resend
v5: no change here
v6: no change here
v7: no change here
v8: changed subject
v9: no change here
v10: no change here
---
 .../devicetree/bindings/eeprom/at25.yaml      | 31 +++++++++++++++----
 1 file changed, 25 insertions(+), 6 deletions(-)

diff --git a/Documentation/devicetree/bindings/eeprom/at25.yaml b/Documentation/devicetree/bindings/eeprom/at25.yaml
index 121a601db22e..840ee7a83a14 100644
--- a/Documentation/devicetree/bindings/eeprom/at25.yaml
+++ b/Documentation/devicetree/bindings/eeprom/at25.yaml
@@ -4,14 +4,16 @@
 $id: "http://devicetree.org/schemas/eeprom/at25.yaml#"
 $schema: "http://devicetree.org/meta-schemas/core.yaml#"
 
-title: SPI EEPROMs compatible with Atmel's AT25
+title: SPI EEPROMs or FRAMs compatible with Atmel's AT25
 
 maintainers:
   - Christian Eggers <ceggers@arri.de>
 
 properties:
   $nodename:
-    pattern: "^eeprom@[0-9a-f]{1,2}$"
+    anyOf:
+      - pattern: "^eeprom@[0-9a-f]{1,2}$"
+      - pattern: "^fram@[0-9a-f]{1,2}$"
 
   # There are multiple known vendors who manufacture EEPROM chips compatible
   # with Atmel's AT25. The compatible string requires two items where the
@@ -31,6 +33,7 @@ properties:
               - microchip,25lc040
               - st,m95m02
               - st,m95256
+              - cypress,fm25
 
           - const: atmel,at25
 
@@ -48,7 +51,7 @@ properties:
     $ref: /schemas/types.yaml#/definitions/uint32
     enum: [1, 8, 16, 32, 64, 128, 256, 512, 1024, 2048, 4096, 8192, 16384, 32768, 65536, 131072]
     description:
-      Size of the eeprom page.
+      Size of the eeprom page. FRAMs don't have pages.
 
   size:
     $ref: /schemas/types.yaml#/definitions/uint32
@@ -101,9 +104,19 @@ required:
   - compatible
   - reg
   - spi-max-frequency
-  - pagesize
-  - size
-  - address-width
+
+allOf:
+  - if:
+      properties:
+        compatible:
+          not:
+            contains:
+              const: cypress,fm25
+    then:
+      required:
+        - pagesize
+        - size
+        - address-width
 
 additionalProperties: false
 
@@ -126,4 +139,10 @@ examples:
             size = <32768>;
             address-width = <16>;
         };
+
+        fram@1 {
+            compatible = "cypress,fm25", "atmel,at25";
+            reg = <1>;
+            spi-max-frequency = <40000000>;
+        };
     };
-- 
2.25.1


^ permalink raw reply	[flat|nested] 10+ messages in thread

* [PATCH v10 4/4] nvmem: eeprom: at25: export FRAM serial num
  2021-06-11  9:45 [PATCH v10 0/4] add support for FRAM Jiri Prchal
                   ` (2 preceding siblings ...)
  2021-06-11  9:46 ` [PATCH v10 3/4] dt-bindings: nvmem: at25: add for FRAM support Jiri Prchal
@ 2021-06-11  9:46 ` Jiri Prchal
  2021-06-16 20:10   ` kernel test robot
  2021-06-22  9:33   ` kernel test robot
  2021-06-11 10:25 ` [PATCH v10 0/4] add support for FRAM Greg Kroah-Hartman
  4 siblings, 2 replies; 10+ messages in thread
From: Jiri Prchal @ 2021-06-11  9:46 UTC (permalink / raw)
  To: devicetree, linux-kernel
  Cc: Rob Herring, Christian Eggers, Arnd Bergmann, Greg Kroah-Hartman,
	Jiri Prchal

This exports serial number of FRAM in sysfs file named "sernum".
Formatted in hex, each byte separated by space.
Example:
$ cat /sys/class/spi_master/spi0/spi0.0/sernum
ef cd ab 89 67 45 23 01

Signed-off-by: Jiri Prchal <jiri.prchal@aksignal.cz>
---
v2: no change here
v3: resend and added more recipients
v4: resend
v5: reworked up on Greg comments: no spaces in string, sysfs done correctly
v6: no change here
v7: moved FM25_SN_LEN, static array, used sysfs_emit, DEVICE_ATTR_RO
v8: clarify sysfs_emit format
v9: sizeof parentheses, export with spaces MSB first
v10: moved documentation to here
---
 .../ABI/testing/sysfs-class-spi-eeprom        | 11 ++++++++
 drivers/misc/eeprom/at25.c                    | 27 +++++++++++++++++++
 2 files changed, 38 insertions(+)

diff --git a/Documentation/ABI/testing/sysfs-class-spi-eeprom b/Documentation/ABI/testing/sysfs-class-spi-eeprom
index 7447e242d415..1ff757982079 100644
--- a/Documentation/ABI/testing/sysfs-class-spi-eeprom
+++ b/Documentation/ABI/testing/sysfs-class-spi-eeprom
@@ -6,3 +6,14 @@ Description:
 	Contains the FRAM binary data. Same as EEPROM, just another file
 	name to indicate that it employs ferroelectric process.
 	It performs write operations at bus speed - no write delays.
+
+What:		/sys/class/spi_master/spi<bus>/spi<bus>.<dev>/sernum
+Date:		May 2021
+KernelVersion:	5.14
+Contact:	Jiri Prchal <jiri.prchal@aksignal.cz>
+Description:
+	Contains the serial number of the Cypress FRAM (FM25VN) if it is
+	present.  It will be displayed as a 8 byte hex string, as read
+	from the device.
+
+	This is a read-only attribute.
diff --git a/drivers/misc/eeprom/at25.c b/drivers/misc/eeprom/at25.c
index 6ac2ddfd6833..6e26de68a001 100644
--- a/drivers/misc/eeprom/at25.c
+++ b/drivers/misc/eeprom/at25.c
@@ -31,6 +31,7 @@
  *   AT25M02, AT25128B
  */
 
+#define	FM25_SN_LEN	8		/* serial number length */
 struct at25_data {
 	struct spi_device	*spi;
 	struct mutex		lock;
@@ -38,6 +39,7 @@ struct at25_data {
 	unsigned		addrlen;
 	struct nvmem_config	nvmem_config;
 	struct nvmem_device	*nvmem;
+	u8 sernum[FM25_SN_LEN];
 };
 
 #define	AT25_WREN	0x06		/* latch the write enable */
@@ -171,6 +173,21 @@ static int fm25_aux_read(struct at25_data *at25, u8 *buf, uint8_t command,
 	return status;
 }
 
+static ssize_t sernum_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	struct at25_data *at25;
+
+	at25 = dev_get_drvdata(dev);
+	return sysfs_emit(buf, "%*ph\n", sizeof(at25->sernum), at25->sernum);
+}
+static DEVICE_ATTR_RO(sernum);
+
+static struct attribute *sernum_attrs[] = {
+	&dev_attr_sernum.attr,
+	NULL,
+};
+ATTRIBUTE_GROUPS(sernum);
+
 static int at25_ee_write(void *priv, unsigned int off, void *val, size_t count)
 {
 	struct at25_data *at25 = priv;
@@ -359,6 +376,8 @@ static int at25_probe(struct spi_device *spi)
 	int			err;
 	int			sr;
 	u8 id[FM25_ID_LEN];
+	u8 sernum[FM25_SN_LEN];
+	int i;
 	const struct of_device_id *match;
 	int is_fram = 0;
 
@@ -415,6 +434,13 @@ static int at25_probe(struct spi_device *spi)
 		else
 			at25->chip.flags |= EE_ADDR2;
 
+		if (id[8]) {
+			fm25_aux_read(at25, sernum, FM25_RDSN, FM25_SN_LEN);
+			/* swap byte order */
+			for (i = 0; i < FM25_SN_LEN; i++)
+				at25->sernum[i] = sernum[FM25_SN_LEN - 1 - i];
+		}
+
 		at25->chip.page_size = PAGE_SIZE;
 		strncpy(at25->chip.name, "fm25", sizeof(at25->chip.name));
 	}
@@ -465,6 +491,7 @@ static struct spi_driver at25_driver = {
 	.driver = {
 		.name		= "at25",
 		.of_match_table = at25_of_match,
+		.dev_groups	= sernum_groups,
 	},
 	.probe		= at25_probe,
 };
-- 
2.25.1


^ permalink raw reply	[flat|nested] 10+ messages in thread

* Re: [PATCH v10 0/4] add support for FRAM
  2021-06-11  9:45 [PATCH v10 0/4] add support for FRAM Jiri Prchal
                   ` (3 preceding siblings ...)
  2021-06-11  9:46 ` [PATCH v10 4/4] nvmem: eeprom: at25: export FRAM serial num Jiri Prchal
@ 2021-06-11 10:25 ` Greg Kroah-Hartman
  4 siblings, 0 replies; 10+ messages in thread
From: Greg Kroah-Hartman @ 2021-06-11 10:25 UTC (permalink / raw)
  To: Jiri Prchal
  Cc: devicetree, linux-kernel, Rob Herring, Christian Eggers, Arnd Bergmann

On Fri, Jun 11, 2021 at 11:45:57AM +0200, Jiri Prchal wrote:
> Adds support for Cypress FRAMs.
> 
> Jiri Prchal (4):
>   nvmem: prepare basics for FRAM support
>   nvmem: eeprom: at25: add support for FRAM
>   dt-bindings: nvmem: at25: add for FRAM support
>   nvmem: eeprom: at25: export FRAM serial num
> 
>  .../ABI/testing/sysfs-class-spi-eeprom        |  19 +++
>  .../devicetree/bindings/eeprom/at25.yaml      |  31 +++-
>  drivers/misc/eeprom/Kconfig                   |   5 +-
>  drivers/misc/eeprom/at25.c                    | 161 ++++++++++++++----
>  drivers/nvmem/core.c                          |   4 +
>  include/linux/nvmem-provider.h                |   1 +
>  6 files changed, 183 insertions(+), 38 deletions(-)
>  create mode 100644 Documentation/ABI/testing/sysfs-class-spi-eeprom
> 
> -- 
> 2.25.1
> 

Looks good to me, now queued up.  Thanks for sticking with this!

greg k-h

^ permalink raw reply	[flat|nested] 10+ messages in thread

* Re: [PATCH v10 2/4] nvmem: eeprom: at25: add support for FRAM
  2021-06-11  9:45 ` [PATCH v10 2/4] nvmem: eeprom: at25: add support for FRAM Jiri Prchal
@ 2021-06-16 18:59   ` kernel test robot
  2021-06-22  7:44   ` kernel test robot
  1 sibling, 0 replies; 10+ messages in thread
From: kernel test robot @ 2021-06-16 18:59 UTC (permalink / raw)
  To: Jiri Prchal, devicetree, linux-kernel
  Cc: kbuild-all, clang-built-linux, Rob Herring, Christian Eggers,
	Arnd Bergmann, Greg Kroah-Hartman, Jiri Prchal,
	kernel test robot

[-- Attachment #1: Type: text/plain, Size: 5861 bytes --]

Hi Jiri,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on robh/for-next]
[also build test WARNING on linux/master linus/master v5.13-rc6]
[cannot apply to char-misc/char-misc-testing next-20210616]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Jiri-Prchal/add-support-for-FRAM/20210616-203024
base:   https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git for-next
config: x86_64-randconfig-a015-20210615 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 64720f57bea6a6bf033feef4a5751ab9c0c3b401)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # install x86_64 cross compiling tool for clang build
        # apt-get install binutils-x86-64-linux-gnu
        # https://github.com/0day-ci/linux/commit/663658b01091a6ef4239088cc41d96821ab6d43e
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Jiri-Prchal/add-support-for-FRAM/20210616-203024
        git checkout 663658b01091a6ef4239088cc41d96821ab6d43e
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

>> drivers/misc/eeprom/at25.c:367:13: warning: cast to smaller integer type 'int' from 'const void *' [-Wvoid-pointer-to-int-cast]
                   is_fram = (int)match->data;
                             ^~~~~~~~~~~~~~~~
   1 warning generated.


vim +367 drivers/misc/eeprom/at25.c

   354	
   355	static int at25_probe(struct spi_device *spi)
   356	{
   357		struct at25_data	*at25 = NULL;
   358		struct spi_eeprom	chip;
   359		int			err;
   360		int			sr;
   361		u8 id[FM25_ID_LEN];
   362		const struct of_device_id *match;
   363		int is_fram = 0;
   364	
   365		match = of_match_device(of_match_ptr(at25_of_match), &spi->dev);
   366		if (match)
 > 367			is_fram = (int)match->data;
   368	
   369		/* Chip description */
   370		if (!spi->dev.platform_data) {
   371			if (!is_fram) {
   372				err = at25_fw_to_chip(&spi->dev, &chip);
   373				if (err)
   374					return err;
   375			}
   376		} else
   377			chip = *(struct spi_eeprom *)spi->dev.platform_data;
   378	
   379		/* Ping the chip ... the status register is pretty portable,
   380		 * unlike probing manufacturer IDs.  We do expect that system
   381		 * firmware didn't write it in the past few milliseconds!
   382		 */
   383		sr = spi_w8r8(spi, AT25_RDSR);
   384		if (sr < 0 || sr & AT25_SR_nRDY) {
   385			dev_dbg(&spi->dev, "rdsr --> %d (%02x)\n", sr, sr);
   386			return -ENXIO;
   387		}
   388	
   389		at25 = devm_kzalloc(&spi->dev, sizeof(struct at25_data), GFP_KERNEL);
   390		if (!at25)
   391			return -ENOMEM;
   392	
   393		mutex_init(&at25->lock);
   394		at25->chip = chip;
   395		at25->spi = spi;
   396		spi_set_drvdata(spi, at25);
   397	
   398		if (is_fram) {
   399			/* Get ID of chip */
   400			fm25_aux_read(at25, id, FM25_RDID, FM25_ID_LEN);
   401			if (id[6] != 0xc2) {
   402				dev_err(&spi->dev,
   403					"Error: no Cypress FRAM (id %02x)\n", id[6]);
   404				return -ENODEV;
   405			}
   406			/* set size found in ID */
   407			if (id[7] < 0x21 || id[7] > 0x26) {
   408				dev_err(&spi->dev, "Error: unsupported size (id %02x)\n", id[7]);
   409				return -ENODEV;
   410			}
   411			chip.byte_len = int_pow(2, id[7] - 0x21 + 4) * 1024;
   412	
   413			if (at25->chip.byte_len > 64 * 1024)
   414				at25->chip.flags |= EE_ADDR3;
   415			else
   416				at25->chip.flags |= EE_ADDR2;
   417	
   418			at25->chip.page_size = PAGE_SIZE;
   419			strncpy(at25->chip.name, "fm25", sizeof(at25->chip.name));
   420		}
   421	
   422		/* For now we only support 8/16/24 bit addressing */
   423		if (at25->chip.flags & EE_ADDR1)
   424			at25->addrlen = 1;
   425		else if (at25->chip.flags & EE_ADDR2)
   426			at25->addrlen = 2;
   427		else if (at25->chip.flags & EE_ADDR3)
   428			at25->addrlen = 3;
   429		else {
   430			dev_dbg(&spi->dev, "unsupported address type\n");
   431			return -EINVAL;
   432		}
   433	
   434		at25->nvmem_config.type = is_fram ? NVMEM_TYPE_FRAM : NVMEM_TYPE_EEPROM;
   435		at25->nvmem_config.name = dev_name(&spi->dev);
   436		at25->nvmem_config.dev = &spi->dev;
   437		at25->nvmem_config.read_only = chip.flags & EE_READONLY;
   438		at25->nvmem_config.root_only = true;
   439		at25->nvmem_config.owner = THIS_MODULE;
   440		at25->nvmem_config.compat = true;
   441		at25->nvmem_config.base_dev = &spi->dev;
   442		at25->nvmem_config.reg_read = at25_ee_read;
   443		at25->nvmem_config.reg_write = at25_ee_write;
   444		at25->nvmem_config.priv = at25;
   445		at25->nvmem_config.stride = 1;
   446		at25->nvmem_config.word_size = 1;
   447		at25->nvmem_config.size = chip.byte_len;
   448	
   449		at25->nvmem = devm_nvmem_register(&spi->dev, &at25->nvmem_config);
   450		if (IS_ERR(at25->nvmem))
   451			return PTR_ERR(at25->nvmem);
   452	
   453		dev_info(&spi->dev, "%d %s %s %s%s, pagesize %u\n",
   454			 (chip.byte_len < 1024) ? chip.byte_len : (chip.byte_len / 1024),
   455			 (chip.byte_len < 1024) ? "Byte" : "KByte",
   456			 at25->chip.name, is_fram ? "fram" : "eeprom",
   457			 (chip.flags & EE_READONLY) ? " (readonly)" : "",
   458			 at25->chip.page_size);
   459		return 0;
   460	}
   461	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

[-- Attachment #2: .config.gz --]
[-- Type: application/gzip, Size: 40655 bytes --]

^ permalink raw reply	[flat|nested] 10+ messages in thread

* Re: [PATCH v10 4/4] nvmem: eeprom: at25: export FRAM serial num
  2021-06-11  9:46 ` [PATCH v10 4/4] nvmem: eeprom: at25: export FRAM serial num Jiri Prchal
@ 2021-06-16 20:10   ` kernel test robot
  2021-06-22  9:33   ` kernel test robot
  1 sibling, 0 replies; 10+ messages in thread
From: kernel test robot @ 2021-06-16 20:10 UTC (permalink / raw)
  To: Jiri Prchal, devicetree, linux-kernel
  Cc: kbuild-all, clang-built-linux, Rob Herring, Christian Eggers,
	Arnd Bergmann, Greg Kroah-Hartman, Jiri Prchal

[-- Attachment #1: Type: text/plain, Size: 2662 bytes --]

Hi Jiri,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on robh/for-next]
[also build test WARNING on linux/master linus/master v5.13-rc6]
[cannot apply to char-misc/char-misc-testing next-20210616]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Jiri-Prchal/add-support-for-FRAM/20210616-203024
base:   https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git for-next
config: x86_64-randconfig-a015-20210615 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 64720f57bea6a6bf033feef4a5751ab9c0c3b401)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # install x86_64 cross compiling tool for clang build
        # apt-get install binutils-x86-64-linux-gnu
        # https://github.com/0day-ci/linux/commit/a1e83140e4bcb84fc663fdb074e2cbb5a771bfc8
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Jiri-Prchal/add-support-for-FRAM/20210616-203024
        git checkout a1e83140e4bcb84fc663fdb074e2cbb5a771bfc8
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

>> drivers/misc/eeprom/at25.c:181:28: warning: field width should have type 'int', but argument has type 'unsigned long' [-Wformat]
           return sysfs_emit(buf, "%*ph\n", sizeof(at25->sernum), at25->sernum);
                                   ~~^      ~~~~~~~~~~~~~~~~~~~~
   drivers/misc/eeprom/at25.c:386:13: warning: cast to smaller integer type 'int' from 'const void *' [-Wvoid-pointer-to-int-cast]
                   is_fram = (int)match->data;
                             ^~~~~~~~~~~~~~~~
   2 warnings generated.


vim +181 drivers/misc/eeprom/at25.c

   175	
   176	static ssize_t sernum_show(struct device *dev, struct device_attribute *attr, char *buf)
   177	{
   178		struct at25_data *at25;
   179	
   180		at25 = dev_get_drvdata(dev);
 > 181		return sysfs_emit(buf, "%*ph\n", sizeof(at25->sernum), at25->sernum);
   182	}
   183	static DEVICE_ATTR_RO(sernum);
   184	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

[-- Attachment #2: .config.gz --]
[-- Type: application/gzip, Size: 40655 bytes --]

^ permalink raw reply	[flat|nested] 10+ messages in thread

* Re: [PATCH v10 2/4] nvmem: eeprom: at25: add support for FRAM
  2021-06-11  9:45 ` [PATCH v10 2/4] nvmem: eeprom: at25: add support for FRAM Jiri Prchal
  2021-06-16 18:59   ` kernel test robot
@ 2021-06-22  7:44   ` kernel test robot
  1 sibling, 0 replies; 10+ messages in thread
From: kernel test robot @ 2021-06-22  7:44 UTC (permalink / raw)
  To: Jiri Prchal, devicetree, linux-kernel
  Cc: kbuild-all, Rob Herring, Christian Eggers, Arnd Bergmann,
	Greg Kroah-Hartman, Jiri Prchal, kernel test robot

[-- Attachment #1: Type: text/plain, Size: 5668 bytes --]

Hi Jiri,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on robh/for-next]
[also build test WARNING on linux/master linus/master v5.13-rc7]
[cannot apply to char-misc/char-misc-testing next-20210621]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Jiri-Prchal/add-support-for-FRAM/20210616-203024
base:   https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git for-next
config: mips-randconfig-r035-20210622 (attached as .config)
compiler: mips64-linux-gcc (GCC) 9.3.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/0day-ci/linux/commit/663658b01091a6ef4239088cc41d96821ab6d43e
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Jiri-Prchal/add-support-for-FRAM/20210616-203024
        git checkout 663658b01091a6ef4239088cc41d96821ab6d43e
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=mips 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

   drivers/misc/eeprom/at25.c: In function 'at25_probe':
>> drivers/misc/eeprom/at25.c:367:13: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
     367 |   is_fram = (int)match->data;
         |             ^


vim +367 drivers/misc/eeprom/at25.c

   354	
   355	static int at25_probe(struct spi_device *spi)
   356	{
   357		struct at25_data	*at25 = NULL;
   358		struct spi_eeprom	chip;
   359		int			err;
   360		int			sr;
   361		u8 id[FM25_ID_LEN];
   362		const struct of_device_id *match;
   363		int is_fram = 0;
   364	
   365		match = of_match_device(of_match_ptr(at25_of_match), &spi->dev);
   366		if (match)
 > 367			is_fram = (int)match->data;
   368	
   369		/* Chip description */
   370		if (!spi->dev.platform_data) {
   371			if (!is_fram) {
   372				err = at25_fw_to_chip(&spi->dev, &chip);
   373				if (err)
   374					return err;
   375			}
   376		} else
   377			chip = *(struct spi_eeprom *)spi->dev.platform_data;
   378	
   379		/* Ping the chip ... the status register is pretty portable,
   380		 * unlike probing manufacturer IDs.  We do expect that system
   381		 * firmware didn't write it in the past few milliseconds!
   382		 */
   383		sr = spi_w8r8(spi, AT25_RDSR);
   384		if (sr < 0 || sr & AT25_SR_nRDY) {
   385			dev_dbg(&spi->dev, "rdsr --> %d (%02x)\n", sr, sr);
   386			return -ENXIO;
   387		}
   388	
   389		at25 = devm_kzalloc(&spi->dev, sizeof(struct at25_data), GFP_KERNEL);
   390		if (!at25)
   391			return -ENOMEM;
   392	
   393		mutex_init(&at25->lock);
   394		at25->chip = chip;
   395		at25->spi = spi;
   396		spi_set_drvdata(spi, at25);
   397	
   398		if (is_fram) {
   399			/* Get ID of chip */
   400			fm25_aux_read(at25, id, FM25_RDID, FM25_ID_LEN);
   401			if (id[6] != 0xc2) {
   402				dev_err(&spi->dev,
   403					"Error: no Cypress FRAM (id %02x)\n", id[6]);
   404				return -ENODEV;
   405			}
   406			/* set size found in ID */
   407			if (id[7] < 0x21 || id[7] > 0x26) {
   408				dev_err(&spi->dev, "Error: unsupported size (id %02x)\n", id[7]);
   409				return -ENODEV;
   410			}
   411			chip.byte_len = int_pow(2, id[7] - 0x21 + 4) * 1024;
   412	
   413			if (at25->chip.byte_len > 64 * 1024)
   414				at25->chip.flags |= EE_ADDR3;
   415			else
   416				at25->chip.flags |= EE_ADDR2;
   417	
   418			at25->chip.page_size = PAGE_SIZE;
   419			strncpy(at25->chip.name, "fm25", sizeof(at25->chip.name));
   420		}
   421	
   422		/* For now we only support 8/16/24 bit addressing */
   423		if (at25->chip.flags & EE_ADDR1)
   424			at25->addrlen = 1;
   425		else if (at25->chip.flags & EE_ADDR2)
   426			at25->addrlen = 2;
   427		else if (at25->chip.flags & EE_ADDR3)
   428			at25->addrlen = 3;
   429		else {
   430			dev_dbg(&spi->dev, "unsupported address type\n");
   431			return -EINVAL;
   432		}
   433	
   434		at25->nvmem_config.type = is_fram ? NVMEM_TYPE_FRAM : NVMEM_TYPE_EEPROM;
   435		at25->nvmem_config.name = dev_name(&spi->dev);
   436		at25->nvmem_config.dev = &spi->dev;
   437		at25->nvmem_config.read_only = chip.flags & EE_READONLY;
   438		at25->nvmem_config.root_only = true;
   439		at25->nvmem_config.owner = THIS_MODULE;
   440		at25->nvmem_config.compat = true;
   441		at25->nvmem_config.base_dev = &spi->dev;
   442		at25->nvmem_config.reg_read = at25_ee_read;
   443		at25->nvmem_config.reg_write = at25_ee_write;
   444		at25->nvmem_config.priv = at25;
   445		at25->nvmem_config.stride = 1;
   446		at25->nvmem_config.word_size = 1;
   447		at25->nvmem_config.size = chip.byte_len;
   448	
   449		at25->nvmem = devm_nvmem_register(&spi->dev, &at25->nvmem_config);
   450		if (IS_ERR(at25->nvmem))
   451			return PTR_ERR(at25->nvmem);
   452	
   453		dev_info(&spi->dev, "%d %s %s %s%s, pagesize %u\n",
   454			 (chip.byte_len < 1024) ? chip.byte_len : (chip.byte_len / 1024),
   455			 (chip.byte_len < 1024) ? "Byte" : "KByte",
   456			 at25->chip.name, is_fram ? "fram" : "eeprom",
   457			 (chip.flags & EE_READONLY) ? " (readonly)" : "",
   458			 at25->chip.page_size);
   459		return 0;
   460	}
   461	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

[-- Attachment #2: .config.gz --]
[-- Type: application/gzip, Size: 25700 bytes --]

^ permalink raw reply	[flat|nested] 10+ messages in thread

* Re: [PATCH v10 4/4] nvmem: eeprom: at25: export FRAM serial num
  2021-06-11  9:46 ` [PATCH v10 4/4] nvmem: eeprom: at25: export FRAM serial num Jiri Prchal
  2021-06-16 20:10   ` kernel test robot
@ 2021-06-22  9:33   ` kernel test robot
  1 sibling, 0 replies; 10+ messages in thread
From: kernel test robot @ 2021-06-22  9:33 UTC (permalink / raw)
  To: Jiri Prchal, devicetree, linux-kernel
  Cc: kbuild-all, Rob Herring, Christian Eggers, Arnd Bergmann,
	Greg Kroah-Hartman, Jiri Prchal

[-- Attachment #1: Type: text/plain, Size: 2667 bytes --]

Hi Jiri,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on robh/for-next]
[also build test WARNING on linux/master linus/master v5.13-rc7]
[cannot apply to char-misc/char-misc-testing next-20210621]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Jiri-Prchal/add-support-for-FRAM/20210616-203024
base:   https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git for-next
config: mips-randconfig-r035-20210622 (attached as .config)
compiler: mips64-linux-gcc (GCC) 9.3.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/0day-ci/linux/commit/a1e83140e4bcb84fc663fdb074e2cbb5a771bfc8
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Jiri-Prchal/add-support-for-FRAM/20210616-203024
        git checkout a1e83140e4bcb84fc663fdb074e2cbb5a771bfc8
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=mips 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

   drivers/misc/eeprom/at25.c: In function 'sernum_show':
>> drivers/misc/eeprom/at25.c:181:27: warning: field width specifier '*' expects argument of type 'int', but argument 3 has type 'long unsigned int' [-Wformat=]
     181 |  return sysfs_emit(buf, "%*ph\n", sizeof(at25->sernum), at25->sernum);
         |                          ~^~      ~~~~~~~~~~~~~~~~~~~~
         |                           |       |
         |                           int     long unsigned int
   drivers/misc/eeprom/at25.c: In function 'at25_probe':
   drivers/misc/eeprom/at25.c:386:13: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
     386 |   is_fram = (int)match->data;
         |             ^


vim +181 drivers/misc/eeprom/at25.c

   175	
   176	static ssize_t sernum_show(struct device *dev, struct device_attribute *attr, char *buf)
   177	{
   178		struct at25_data *at25;
   179	
   180		at25 = dev_get_drvdata(dev);
 > 181		return sysfs_emit(buf, "%*ph\n", sizeof(at25->sernum), at25->sernum);
   182	}
   183	static DEVICE_ATTR_RO(sernum);
   184	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

[-- Attachment #2: .config.gz --]
[-- Type: application/gzip, Size: 25700 bytes --]

^ permalink raw reply	[flat|nested] 10+ messages in thread

end of thread, other threads:[~2021-06-22  9:33 UTC | newest]

Thread overview: 10+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-06-11  9:45 [PATCH v10 0/4] add support for FRAM Jiri Prchal
2021-06-11  9:45 ` [PATCH v10 1/4] nvmem: prepare basics for FRAM support Jiri Prchal
2021-06-11  9:45 ` [PATCH v10 2/4] nvmem: eeprom: at25: add support for FRAM Jiri Prchal
2021-06-16 18:59   ` kernel test robot
2021-06-22  7:44   ` kernel test robot
2021-06-11  9:46 ` [PATCH v10 3/4] dt-bindings: nvmem: at25: add for FRAM support Jiri Prchal
2021-06-11  9:46 ` [PATCH v10 4/4] nvmem: eeprom: at25: export FRAM serial num Jiri Prchal
2021-06-16 20:10   ` kernel test robot
2021-06-22  9:33   ` kernel test robot
2021-06-11 10:25 ` [PATCH v10 0/4] add support for FRAM Greg Kroah-Hartman

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