linux-kernel - [PATCH v2 2/2] mfd: tps65215: Remove regmap

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Message-ID: <20250103225732.196636-3-s-ramamoorthy@ti.com>
Date: Fri, 3 Jan 2025 16:57:32 -0600
From: Shree Ramamoorthy <s-ramamoorthy@...com>
To: <aaro.koskinen@....fi>, <andreas@...nade.info>, <khilman@...libre.com>,
        <rogerq@...nel.org>, <tony@...mide.com>, <lee@...nel.org>,
        <linux-omap@...r.kernel.org>, <linux-kernel@...r.kernel.org>
CC: <m-leonard@...com>, <praneeth@...com>, <christophe.jaillet@...adoo.fr>
Subject: [PATCH v2 2/2] mfd: tps65215: Remove regmap_read check

The chipid macro/variable and regmap_read function call is not needed
because the TPS65219_REG_TI_DEV_ID register value is not a consistent value
across TPS65219 PMIC config versions. Reading from the DEV_ID register
without a consistent value to compare it to isn't useful. There isn't a
way to verify the match data ID is the same ID read from the DEV_ID device
register. 0xF0 isn't a DEV_ID value consistent across TPS65219 NVM
configurations.

For TPS65215, there is a consistent value in bits 5-0 of the DEV_ID
register. However, there are other error checks in place within probe()
that apply to both PMICs rather than keeping this isolated check for one
PMIC.

Signed-off-by: Shree Ramamoorthy <s-ramamoorthy@...com>
---
 drivers/mfd/tps65219.c       | 6 ------
 include/linux/mfd/tps65219.h | 2 --
 2 files changed, 8 deletions(-)

diff --git a/drivers/mfd/tps65219.c b/drivers/mfd/tps65219.c
index 816b271990a2..d3267bf7cd77 100644
--- a/drivers/mfd/tps65219.c
+++ b/drivers/mfd/tps65219.c
@@ -382,12 +382,6 @@ static int tps65219_probe(struct i2c_client *client)
 	if (ret)
 		return ret;
 
-	ret = regmap_read(tps->regmap, TPS65219_REG_TI_DEV_ID, &tps->chip_id);
-	if (ret) {
-		dev_err(tps->dev, "Failed to read device ID: %d\n", ret);
-		return ret;
-	}
-
 	ret = devm_mfd_add_devices(tps->dev, PLATFORM_DEVID_AUTO,
 				   pmic->cells, pmic->n_cells,
 				   NULL, 0, regmap_irq_get_domain(tps->irq_data));
diff --git a/include/linux/mfd/tps65219.h b/include/linux/mfd/tps65219.h
index 9892b6e4c85c..535115bfa4a4 100644
--- a/include/linux/mfd/tps65219.h
+++ b/include/linux/mfd/tps65219.h
@@ -15,8 +15,6 @@
 #include <linux/regmap.h>
 #include <linux/regulator/driver.h>
 
-/* TPS chip id list */
-#define TPS65219					0xF0
 /* Chip id list*/
 enum pmic_id {
 	TPS65215,
-- 
2.34.1