From: "Andreas Färber" <afaerber@suse.de>
To: linux-realtek-soc@lists.infradead.org
Cc: linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org,
"James Tai [戴志峰]" <james.tai@realtek.com>,
"Stanley Chang [昌育德]" <stanley_chang@realtek.com>,
"Edgar Lee" <cylee12@realtek.com>,
"Andreas Färber" <afaerber@suse.de>,
"Srinivas Kandagatla" <srinivas.kandagatla@linaro.org>
Subject: [PATCH v2 28/29] nvmem: core: Add nvmem_cell_read_u8()
Date: Tue, 23 Jun 2020 04:51:05 +0200 [thread overview]
Message-ID: <20200623025106.31273-29-afaerber@suse.de> (raw)
In-Reply-To: <20200623025106.31273-1-afaerber@suse.de>
Complement the u16, u32 and u64 helpers with a u8 variant to ease
accessing byte-sized values.
This helper will be useful for Realtek Digital Home Center platforms,
which store some byte and sub-byte sized values in non-volatile memory.
Signed-off-by: Andreas Färber <afaerber@suse.de>
---
v2: New
drivers/nvmem/core.c | 15 +++++++++++++++
include/linux/nvmem-consumer.h | 1 +
2 files changed, 16 insertions(+)
diff --git a/drivers/nvmem/core.c b/drivers/nvmem/core.c
index 95bed31391cd..d6bacc878500 100644
--- a/drivers/nvmem/core.c
+++ b/drivers/nvmem/core.c
@@ -1374,6 +1374,21 @@ static int nvmem_cell_read_common(struct device *dev, const char *cell_id,
return 0;
}
+/**
+ * nvmem_cell_read_u8() - Read a cell value as a u8
+ *
+ * @dev: Device that requests the nvmem cell.
+ * @cell_id: Name of nvmem cell to read.
+ * @val: pointer to output value.
+ *
+ * Return: 0 on success or negative errno.
+ */
+int nvmem_cell_read_u8(struct device *dev, const char *cell_id, u8 *val)
+{
+ return nvmem_cell_read_common(dev, cell_id, val, sizeof(*val));
+}
+EXPORT_SYMBOL_GPL(nvmem_cell_read_u8);
+
/**
* nvmem_cell_read_u16() - Read a cell value as a u16
*
diff --git a/include/linux/nvmem-consumer.h b/include/linux/nvmem-consumer.h
index 1b311d27c9b8..052293f4cbdb 100644
--- a/include/linux/nvmem-consumer.h
+++ b/include/linux/nvmem-consumer.h
@@ -61,6 +61,7 @@ void nvmem_cell_put(struct nvmem_cell *cell);
void devm_nvmem_cell_put(struct device *dev, struct nvmem_cell *cell);
void *nvmem_cell_read(struct nvmem_cell *cell, size_t *len);
int nvmem_cell_write(struct nvmem_cell *cell, void *buf, size_t len);
+int nvmem_cell_read_u8(struct device *dev, const char *cell_id, u8 *val);
int nvmem_cell_read_u16(struct device *dev, const char *cell_id, u16 *val);
int nvmem_cell_read_u32(struct device *dev, const char *cell_id, u32 *val);
int nvmem_cell_read_u64(struct device *dev, const char *cell_id, u64 *val);
--
2.26.2
next prev parent reply other threads:[~2020-06-23 2:52 UTC|newest]
Thread overview: 53+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-23 2:50 [PATCH v2 00/29] ARM: Realtek DHC SoC info Andreas Färber
2020-06-23 2:50 ` [PATCH v2 01/29] dt-bindings: soc: Add Realtek RTD1195 chip info binding Andreas Färber
2020-07-14 2:13 ` Rob Herring
2020-06-23 2:50 ` [PATCH v2 02/29] soc: Add Realtek DHC chip info driver for RTD1195 and RTD1295 Andreas Färber
2020-07-10 7:55 ` Stanley Chang[昌育德]
2020-06-23 2:50 ` [PATCH v2 03/29] arm64: dts: realtek: rtd129x: Add chip info node Andreas Färber
2020-07-10 7:56 ` Stanley Chang[昌育德]
2020-06-23 2:50 ` [PATCH v2 04/29] ARM: dts: rtd1195: " Andreas Färber
2020-07-10 7:57 ` Stanley Chang[昌育德]
2020-06-23 2:50 ` [PATCH v2 05/29] dt-bindings: soc: realtek: rtd1195-chip: Add iso-syscon property Andreas Färber
2020-07-14 2:13 ` Rob Herring
2020-06-23 2:50 ` [PATCH v2 06/29] soc: realtek: chip: Detect RTD1296 Andreas Färber
2020-07-10 7:58 ` Stanley Chang[昌育德]
2020-06-23 2:50 ` [PATCH v2 07/29] arm64: dts: realtek: rtd129x: Extend chip-info reg with CHIP_INFO1 Andreas Färber
2020-07-10 7:59 ` Stanley Chang[昌育德]
2020-06-23 2:50 ` [PATCH v2 08/29] soc: realtek: chip: Detect RTD1293 Andreas Färber
2020-06-23 2:50 ` [PATCH v2 09/29] soc: realtek: chip: Add RTD1395 info Andreas Färber
2020-07-10 8:01 ` Stanley Chang[昌育德]
2020-06-23 2:50 ` [PATCH v2 10/29] arm64: dts: realtek: rtd139x: Add chip info node Andreas Färber
2020-07-10 8:03 ` Stanley Chang[昌育德]
2020-06-23 2:50 ` [PATCH v2 11/29] soc: realtek: chip: Add RTD1619 info Andreas Färber
2020-07-10 8:02 ` Stanley Chang[昌育德]
2020-06-23 2:50 ` [PATCH v2 12/29] arm64: dts: realtek: rtd16xx: Add chip info node Andreas Färber
2020-07-10 8:02 ` Stanley Chang[昌育德]
2020-06-23 2:50 ` [PATCH v2 13/29] soc: realtek: chip: Add RTD1319 info Andreas Färber
2020-07-10 8:04 ` Stanley Chang[昌育德]
2020-06-23 2:50 ` [PATCH v2 14/29] soc: realtek: chip: Add RTD1319 revisions Andreas Färber
2020-07-10 8:04 ` Stanley Chang[昌育德]
2020-06-23 2:50 ` [PATCH v2 15/29] arm64: dts: realtek: rtd13xx: Add chip info node Andreas Färber
2020-07-10 8:06 ` Stanley Chang[昌育德]
2020-06-23 2:50 ` [PATCH v2 16/29] soc: realtek: chip: Detect RTD1392 Andreas Färber
2020-07-10 8:05 ` Stanley Chang[昌育德]
2020-06-23 2:50 ` [PATCH v2 17/29] dt-bindings: nvmem: Add Realtek RTD1195 eFuse Andreas Färber
2020-07-14 2:15 ` Rob Herring
2020-06-23 2:50 ` [PATCH v2 18/29] nvmem: Add Realtek DHC eFuse driver Andreas Färber
2020-06-23 9:32 ` Srinivas Kandagatla
2020-06-23 11:15 ` Andreas Färber
2020-07-20 9:31 ` Srinivas Kandagatla
2020-06-23 2:50 ` [PATCH v2 19/29] ARM: dts: rtd1195: Add eFuse node Andreas Färber
2020-06-23 2:50 ` [PATCH v2 20/29] arm64: dts: realtek: rtd129x: " Andreas Färber
2020-06-23 2:50 ` [PATCH v2 21/29] arm64: dts: realtek: rtd139x: " Andreas Färber
2020-06-23 2:50 ` [PATCH v2 22/29] arm64: dts: realtek: rtd16xx: " Andreas Färber
2020-06-23 2:51 ` [PATCH v2 23/29] arm64: dts: realtek: rtd13xx: " Andreas Färber
2020-06-23 2:51 ` [PATCH v2 24/29] dt-bindings: soc: realtek: rtd1195-chip: Allow nvmem-cells property Andreas Färber
2020-07-14 2:15 ` Rob Herring
2020-06-23 2:51 ` [PATCH v2 25/29] arm64: dts: realtek: rtd129x: Add eFuse package_id to chip-info Andreas Färber
2020-06-23 2:51 ` [PATCH v2 26/29] soc: realtek: chip: Detect RTD1294 Andreas Färber
2020-07-10 8:07 ` Stanley Chang[昌育德]
2020-06-23 2:51 ` [PATCH v2 27/29] nvmem: core: Grammar fixes for help text Andreas Färber
2020-06-23 9:30 ` Srinivas Kandagatla
2020-06-23 2:51 ` Andreas Färber [this message]
2020-06-23 9:30 ` [PATCH v2 28/29] nvmem: core: Add nvmem_cell_read_u8() Srinivas Kandagatla
2020-06-23 2:51 ` [PATCH v2 29/29] soc: realtek: chip: Adopt nvmem_cell_read_u8() helper Andreas Färber
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