linux-kernel - [PATCH] mfd: ezx-pcap: Remove unused pcap_adc

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Message-ID: <20250306011027.257021-1-linux@treblig.org>
Date: Thu,  6 Mar 2025 01:10:27 +0000
From: linux@...blig.org
To: lee@...nel.org
Cc: linux-kernel@...r.kernel.org,
	"Dr. David Alan Gilbert" <linux@...blig.org>
Subject: [PATCH] mfd: ezx-pcap: Remove unused pcap_adc_sync

From: "Dr. David Alan Gilbert" <linux@...blig.org>

pcap_adc_sync() was added in 2009 by
commit 13a09f93d2bf ("mfd: add PCAP driver")
but has remained unused; the async version is still used.

Remove it.

Signed-off-by: Dr. David Alan Gilbert <linux@...blig.org>
---
 drivers/mfd/ezx-pcap.c       | 33 ---------------------------------
 include/linux/mfd/ezx-pcap.h |  1 -
 2 files changed, 34 deletions(-)

diff --git a/drivers/mfd/ezx-pcap.c b/drivers/mfd/ezx-pcap.c
index 8d006f6be48c..1be4557b7bdd 100644
--- a/drivers/mfd/ezx-pcap.c
+++ b/drivers/mfd/ezx-pcap.c
@@ -25,11 +25,6 @@ struct pcap_adc_request {
 	void *data;
 };
 
-struct pcap_adc_sync_request {
-	u16 res[2];
-	struct completion completion;
-};
-
 struct pcap_chip {
 	struct spi_device *spi;
 
@@ -335,34 +330,6 @@ int pcap_adc_async(struct pcap_chip *pcap, u8 bank, u32 flags, u8 ch[],
 }
 EXPORT_SYMBOL_GPL(pcap_adc_async);
 
-static void pcap_adc_sync_cb(void *param, u16 res[])
-{
-	struct pcap_adc_sync_request *req = param;
-
-	req->res[0] = res[0];
-	req->res[1] = res[1];
-	complete(&req->completion);
-}
-
-int pcap_adc_sync(struct pcap_chip *pcap, u8 bank, u32 flags, u8 ch[],
-								u16 res[])
-{
-	struct pcap_adc_sync_request sync_data;
-	int ret;
-
-	init_completion(&sync_data.completion);
-	ret = pcap_adc_async(pcap, bank, flags, ch, pcap_adc_sync_cb,
-								&sync_data);
-	if (ret)
-		return ret;
-	wait_for_completion(&sync_data.completion);
-	res[0] = sync_data.res[0];
-	res[1] = sync_data.res[1];
-
-	return 0;
-}
-EXPORT_SYMBOL_GPL(pcap_adc_sync);
-
 /* subdevs */
 static int pcap_remove_subdev(struct device *dev, void *unused)
 {
diff --git a/include/linux/mfd/ezx-pcap.h b/include/linux/mfd/ezx-pcap.h
index ffde195e12b7..ea51b1cdca5a 100644
--- a/include/linux/mfd/ezx-pcap.h
+++ b/include/linux/mfd/ezx-pcap.h
@@ -31,7 +31,6 @@ int ezx_pcap_set_bits(struct pcap_chip *, u8, u32, u32);
 int pcap_to_irq(struct pcap_chip *, int);
 int irq_to_pcap(struct pcap_chip *, int);
 int pcap_adc_async(struct pcap_chip *, u8, u32, u8[], void *, void *);
-int pcap_adc_sync(struct pcap_chip *, u8, u32, u8[], u16[]);
 void pcap_set_ts_bits(struct pcap_chip *, u32);
 
 #define PCAP_SECOND_PORT	1
-- 
2.48.1