[PATCH v3 1/3] bootcount: Remove legacy I2C driver

[Philip Richard Oberfichtner]

The legacy I2C bootcounter will hereby be removed and eventually
be replaced by a driver model implementation in the follow-up commit.

The legacy driver has the following drawbacks:
	- It's not adhering to the driver model
	- Settings are grabbed from Kconfig rather than device tree
	- i2c_{read,write} are being used instead of dm_i2c_{read,write}

Signed-off-by: Philip Richard Oberfichtner <pro at denx.de>
---

Notes:
    Changes in v3: none
    Changes in v2: none

 drivers/bootcount/Kconfig         | 24 +++--------------
 drivers/bootcount/Makefile        |  1 -
 drivers/bootcount/bootcount_i2c.c | 43 -------------------------------
 3 files changed, 3 insertions(+), 65 deletions(-)
 delete mode 100644 drivers/bootcount/bootcount_i2c.c

diff --git a/drivers/bootcount/Kconfig b/drivers/bootcount/Kconfig
index 570252d186..7a2548ace2 100644
--- a/drivers/bootcount/Kconfig
+++ b/drivers/bootcount/Kconfig
@@ -79,14 +79,6 @@ config BOOTCOUNT_RAM
 	  Store the bootcount in DRAM protected against bit errors
 	  due to short power loss or holding a system in RESET.
 
-config BOOTCOUNT_I2C
-	bool "Boot counter on I2C device"
-	help
-	  Enable support for the bootcounter on an i2c (like RTC) device.
-	  CFG_SYS_I2C_RTC_ADDR = i2c chip address
-	  CONFIG_SYS_BOOTCOUNT_ADDR = i2c addr which is used for
-	                              the bootcounter.
-
 config BOOTCOUNT_AT91
 	bool "Boot counter for Atmel AT91SAM9XE"
 	depends on AT91SAM9XE
@@ -175,14 +167,6 @@ config BOOTCOUNT_BOOTLIMIT
 	  counter being cleared.
 	  If set to 0, do not set a boot limit in the environment.
 
-config BOOTCOUNT_ALEN
-	int "I2C address length"
-	default 1
-	depends on BOOTCOUNT_I2C
-	help
-	  Length of the the I2C address at SYS_BOOTCOUNT_ADDR for storing
-	  the boot counter.
-
 config SYS_BOOTCOUNT_SINGLEWORD
 	bool "Use single word to pack boot count and magic value"
 	depends on BOOTCOUNT_GENERIC
@@ -218,7 +202,7 @@ config SYS_BOOTCOUNT_ADDR
 	default 0x44E3E000 if BOOTCOUNT_AM33XX || BOOTCOUNT_AM33XX_NVMEM
 	default 0xE0115FF8 if ARCH_LS1043A || ARCH_LS1021A
 	depends on BOOTCOUNT_AM33XX || BOOTCOUNT_GENERIC || BOOTCOUNT_EXT || \
-		   BOOTCOUNT_I2C || BOOTCOUNT_AM33XX_NVMEM
+		   BOOTCOUNT_AM33XX_NVMEM
 	help
 	  Set the address used for reading and writing the boot counter.
 
@@ -226,13 +210,11 @@ config SYS_BOOTCOUNT_MAGIC
 	hex "Magic value for the boot counter"
 	default 0xB001C041 if BOOTCOUNT_GENERIC || BOOTCOUNT_EXT || \
 			      BOOTCOUNT_AM33XX || BOOTCOUNT_ENV || \
-			      BOOTCOUNT_RAM || BOOTCOUNT_I2C || \
-			      BOOTCOUNT_AT91 || DM_BOOTCOUNT
+			      BOOTCOUNT_RAM || BOOTCOUNT_AT91 || DM_BOOTCOUNT
 	default 0xB0 if BOOTCOUNT_AM33XX_NVMEM
 	depends on BOOTCOUNT_GENERIC || BOOTCOUNT_EXT || \
 		   BOOTCOUNT_AM33XX || BOOTCOUNT_ENV || \
-		   BOOTCOUNT_RAM || BOOTCOUNT_I2C || \
-		   BOOTCOUNT_AT91 || DM_BOOTCOUNT || \
+		   BOOTCOUNT_RAM || BOOTCOUNT_AT91 || DM_BOOTCOUNT || \
 		   BOOTCOUNT_AM33XX_NVMEM
 	help
 	  Set the magic value used for the boot counter.
diff --git a/drivers/bootcount/Makefile b/drivers/bootcount/Makefile
index b65959a384..d6d2389c16 100644
--- a/drivers/bootcount/Makefile
+++ b/drivers/bootcount/Makefile
@@ -6,7 +6,6 @@ obj-$(CONFIG_BOOTCOUNT_AT91)	+= bootcount_at91.o
 obj-$(CONFIG_BOOTCOUNT_AM33XX)	+= bootcount_davinci.o
 obj-$(CONFIG_BOOTCOUNT_RAM)	+= bootcount_ram.o
 obj-$(CONFIG_BOOTCOUNT_ENV)	+= bootcount_env.o
-obj-$(CONFIG_BOOTCOUNT_I2C)	+= bootcount_i2c.o
 obj-$(CONFIG_BOOTCOUNT_EXT)	+= bootcount_ext.o
 obj-$(CONFIG_BOOTCOUNT_AM33XX_NVMEM)	+= bootcount_nvmem.o
 
diff --git a/drivers/bootcount/bootcount_i2c.c b/drivers/bootcount/bootcount_i2c.c
deleted file mode 100644
index b3ac67ea35..0000000000
--- a/drivers/bootcount/bootcount_i2c.c
+++ /dev/null
@@ -1,43 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0+
-/*
- * (C) Copyright 2013
- * Heiko Schocher, DENX Software Engineering, hs at denx.de.
- */
-
-#include <bootcount.h>
-#include <linux/compiler.h>
-#include <i2c.h>
-
-#define BC_MAGIC	0xbc
-
-void bootcount_store(ulong a)
-{
-	unsigned char buf[3];
-	int ret;
-
-	buf[0] = BC_MAGIC;
-	buf[1] = (a & 0xff);
-	ret = i2c_write(CFG_SYS_I2C_RTC_ADDR, CONFIG_SYS_BOOTCOUNT_ADDR,
-		  CONFIG_BOOTCOUNT_ALEN, buf, 2);
-	if (ret != 0)
-		puts("Error writing bootcount\n");
-}
-
-ulong bootcount_load(void)
-{
-	unsigned char buf[3];
-	int ret;
-
-	ret = i2c_read(CFG_SYS_I2C_RTC_ADDR, CONFIG_SYS_BOOTCOUNT_ADDR,
-		       CONFIG_BOOTCOUNT_ALEN, buf, 2);
-	if (ret != 0) {
-		puts("Error loading bootcount\n");
-		return 0;
-	}
-	if (buf[0] == BC_MAGIC)
-		return buf[1];
-
-	bootcount_store(0);
-
-	return 0;
-}
-- 
2.42.0