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Wed, 11 Feb 2026 15:59:09 -0800 (PST) From: Yauhen Kharuzhy To: Dmitry Torokhov , linux-input@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Hans de Goede , Yauhen Kharuzhy Subject: [PATCH 3/5] input: drv260x: Check the device ID at initialization Date: Thu, 12 Feb 2026 01:46:53 +0200 Message-ID: <20260211235902.4156624-4-jekhor@gmail.com> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20260211235902.4156624-1-jekhor@gmail.com> References: <20260211235902.4156624-1-jekhor@gmail.com> Precedence: bulk X-Mailing-List: linux-input@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit To ensure that the device is accessible on the I2C bus, read the status register and check the Device ID field in drv260x_init(). Signed-off-by: Yauhen Kharuzhy --- drivers/input/misc/drv260x.c | 44 ++++++++++++++++++++++++++++++++++++ 1 file changed, 44 insertions(+) diff --git a/drivers/input/misc/drv260x.c b/drivers/input/misc/drv260x.c index f613c81fa2ba..f08a3d6c3ed8 100644 --- a/drivers/input/misc/drv260x.c +++ b/drivers/input/misc/drv260x.c @@ -56,6 +56,13 @@ #define DRV260X_LRA_RES_PERIOD 0x22 #define DRV260X_MAX_REG 0x23 +#define DRV260X_STATUS_ID_MASK 0xe0 +#define DRV260X_STATUS_ID_SHIFT 5 +#define DRV260X_ID_DRV2605 3 +#define DRV260X_ID_DRV2604 4 +#define DRV260X_ID_DRV2604L 6 +#define DRV260X_ID_DRV2605L 7 + #define DRV260X_GO_BIT 0x01 /* Library Selection */ @@ -305,10 +312,47 @@ static const struct reg_sequence drv260x_erm_cal_regs[] = { { DRV260X_CTRL4, DRV260X_AUTOCAL_TIME_500MS }, }; +struct drv260x_id_map { + u8 id; + char *name; +}; + +static const struct drv260x_id_map drv_260x_devids[] = { + { DRV260X_ID_DRV2605, "DRV2605"}, + { DRV260X_ID_DRV2604, "DRV2604"}, + { DRV260X_ID_DRV2604L, "DRV2604L"}, + { DRV260X_ID_DRV2605L, "DRV2605L"}, +}; + +static char *drv260x_get_model(u8 id) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(drv_260x_devids); i++) + if (id == drv_260x_devids[i].id) + return drv_260x_devids[i].name; + + return NULL; +} + static int drv260x_init(struct drv260x_data *haptics) { int error; unsigned int cal_buf; + u8 id; + + error = regmap_read(haptics->regmap, DRV260X_STATUS, &cal_buf); + if (error) { + dev_err(&haptics->client->dev, + "Failed to read DRV260X_status register: %d\n", + error); + return error; + } + + id = (cal_buf & DRV260X_STATUS_ID_MASK) >> DRV260X_STATUS_ID_SHIFT; + + dev_info(&haptics->client->dev, "ID: %u (%s)\n", id, + drv260x_get_model(id)); error = regmap_write(haptics->regmap, DRV260X_RATED_VOLT, haptics->rated_voltage); -- 2.51.0