From: Alex Riesen <alexander.riesen@cetitec.com>
To: Kieran Bingham <kieran.bingham@ideasonboard.com>
Cc: Mauro Carvalho Chehab <mchehab@kernel.org>,
Hans Verkuil <hverkuil-cisco@xs4all.nl>,
Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
Rob Herring <robh+dt@kernel.org>,
"Mark Rutland" <mark.rutland@arm.com>,
<devel@driverdev.osuosl.org>, <linux-media@vger.kernel.org>,
<linux-kernel@vger.kernel.org>, <devicetree@vger.kernel.org>,
<linux-renesas-soc@vger.kernel.org>
Subject: [PATCH 1/8] media: adv748x: add a device-specific wrapper for register block read
Date: Mon, 13 Jan 2020 15:15:09 +0100 [thread overview]
Message-ID: <20200113141509.GB3606@pflmari> (raw)
In-Reply-To: <cover.1578924232.git.alexander.riesen@cetitec.com>
Some of the devices I2C-accessible registers (for instance, cs_data for
stereo channel information or tmds_params for TMDS channel information)
located in adjacent cells. According to manufacturers information, these
registers can be read using block transactions.
Signed-off-by: Alexander Riesen <alexander.riesen@cetitec.com>
---
drivers/media/i2c/adv748x/adv748x-core.c | 15 +++++++++++++++
drivers/media/i2c/adv748x/adv748x.h | 2 ++
2 files changed, 17 insertions(+)
diff --git a/drivers/media/i2c/adv748x/adv748x-core.c b/drivers/media/i2c/adv748x/adv748x-core.c
index 23e02ff27b17..bc49aa93793c 100644
--- a/drivers/media/i2c/adv748x/adv748x-core.c
+++ b/drivers/media/i2c/adv748x/adv748x-core.c
@@ -97,6 +97,21 @@ static const struct adv748x_register_map adv748x_default_addresses[] = {
[ADV748X_PAGE_TXA] = { "txa", 0x4a },
};
+int adv748x_read_block(struct adv748x_state *state, u8 client_page, u8 reg,
+ void *val, size_t reg_count)
+{
+ struct i2c_client *client = state->i2c_clients[client_page];
+ int err;
+
+ err = regmap_bulk_read(state->regmap[client_page], reg, val, reg_count);
+ if (err) {
+ adv_err(state, "error reading %02x, %02x-%02lx: %d\n",
+ client->addr, reg, reg + reg_count - 1, err);
+ return err;
+ }
+ return 0;
+}
+
static int adv748x_read_check(struct adv748x_state *state,
int client_page, u8 reg)
{
diff --git a/drivers/media/i2c/adv748x/adv748x.h b/drivers/media/i2c/adv748x/adv748x.h
index 5042f9e94aee..db6346a06351 100644
--- a/drivers/media/i2c/adv748x/adv748x.h
+++ b/drivers/media/i2c/adv748x/adv748x.h
@@ -387,6 +387,8 @@ struct adv748x_state {
/* Register handling */
int adv748x_read(struct adv748x_state *state, u8 addr, u8 reg);
+int adv748x_read_block(struct adv748x_state *state, u8 page, u8 reg,
+ void *val, size_t reg_count);
int adv748x_write(struct adv748x_state *state, u8 page, u8 reg, u8 value);
int adv748x_write_block(struct adv748x_state *state, int client_page,
unsigned int init_reg, const void *val,
--
2.24.1.508.g91d2dafee0
next prev parent reply other threads:[~2020-01-13 14:15 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-13 14:19 [PATCH 0/8] media: i2c: adv748x: add support for HDMI audio Alex Riesen
2020-01-13 14:15 ` Alex Riesen [this message]
2020-01-13 14:15 ` [PATCH 2/8] media: adv748x: add audio mute control and output selection ioctls Alex Riesen
2020-03-13 8:16 ` Hans Verkuil
2020-03-13 10:26 ` Alex Riesen
2020-03-13 10:52 ` Hans Verkuil
2020-03-13 11:00 ` Alex Riesen
2020-01-13 14:15 ` [PATCH 3/8] media: adv748x: add log_status ioctl Alex Riesen
2020-01-13 14:15 ` [PATCH 4/8] media: adv748x: reserve space for the audio (I2S) port in the driver structures Alex Riesen
2020-01-13 14:15 ` [PATCH 5/8] media: adv748x: add an ASoC DAI definition to the driver Alex Riesen
2020-01-13 14:15 ` [PATCH 6/8] media: adv748x: reduce amount of code for bitwise modification of device registers Alex Riesen
2020-01-13 14:15 ` [PATCH 7/8] dt-bindings: adv748x: add information about serial audio interface (I2S/TDM) Alex Riesen
2020-01-13 22:32 ` Rob Herring
2020-01-13 14:15 ` [PATCH 8/8] arm64: dts: renesas: salvator: add a connection from adv748x codec (HDMI input) to the R-Car SoC Alex Riesen
2020-03-02 12:28 ` Geert Uytterhoeven
2020-03-02 13:40 ` Alex Riesen
2020-03-02 13:47 ` Geert Uytterhoeven
2020-03-02 15:07 ` Alex Riesen
2020-03-02 15:32 ` Geert Uytterhoeven
2020-03-02 16:09 ` Alex Riesen
2020-03-02 16:13 ` Geert Uytterhoeven
2020-03-05 14:36 ` Alex Riesen
2020-03-06 12:21 ` Geert Uytterhoeven
2020-03-06 13:16 ` Laurent Pinchart
2020-03-06 13:41 ` Alex Riesen
2020-03-06 13:45 ` Laurent Pinchart
2020-03-09 1:31 ` Kuninori Morimoto
2020-03-09 11:09 ` Alex Riesen
2020-03-10 1:07 ` Kuninori Morimoto
2020-03-10 8:17 ` Alex Riesen
2020-03-10 10:39 ` Laurent Pinchart
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