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i2c: add bcm283x i2c host controller support

PATCH In review Daniel Brát 2 participants 2 messages Jun 15, 2022 – Jun 17, 2022

Subsystems (4)
Arm (32-bit) I2C subsystem host drivers Broadcom BCM2711/BCM2835 Arm architecture Broadcom BCM281XX/BCM11XXX/BCM216XX Arm architecture
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Daniel Brát

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#0 lore raw

PATCH v2 1/1 i2c: add bcm283x i2c host controller support

Add a driver to support the i2c host controller (BSC) found in Broadcom's bcm283x family of SoCs (used by rpi boards).

Signed-off-by Daniel Brát <[email protected]>
---
 arch/arm/configs/rpi_defconfig     |   3 +-
 arch/arm/configs/rpi_v8a_defconfig |   3 +-
 drivers/i2c/busses/Kconfig         |   4 +
 drivers/i2c/busses/Makefile        |   1 +
 drivers/i2c/busses/i2c-bcm283x.c   | 327 +++++++++++++++++++++++++++++
 5 files changed, 336 insertions(+), 2 deletions(-)
 create mode 100644 drivers/i2c/busses/i2c-bcm283x.c
arch/arm/configs/rpi_defconfig +2 -1
index e0e149748..e7d695f8a 100644
@@ -24,7 +24,6 @@ CONFIG_BOOTM_OFTREE=y
 CONFIG_BLSPEC=y
 CONFIG_CONSOLE_ALLOW_COLOR=y
 CONFIG_DEFAULT_ENVIRONMENT_GENERIC_NEW=y
-CONFIG_DEFAULT_ENVIRONMENT_PATH=""
 CONFIG_CMD_DMESG=y
 CONFIG_LONGHELP=y
 CONFIG_CMD_IOMEM=y

@@ -83,6 +82,8 @@ CONFIG_SERIAL_AMBA_PL011=y
 CONFIG_DRIVER_SERIAL_NS16550=y
 CONFIG_NET_USB=y
 CONFIG_NET_USB_SMSC95XX=y
+CONFIG_I2C=y
+CONFIG_I2C_BCM283X=y
 CONFIG_USB_HOST=y
 CONFIG_USB_DWC2_HOST=y
 CONFIG_MCI=y
arch/arm/configs/rpi_v8a_defconfig +2 -1
index 68cd2438b..e218311a7 100644
@@ -81,6 +81,8 @@ CONFIG_SERIAL_AMBA_PL011=y
 CONFIG_DRIVER_SERIAL_NS16550=y
 CONFIG_NET_USB=y
 CONFIG_NET_USB_SMSC95XX=y
+CONFIG_I2C=y
+CONFIG_I2C_BCM283X=y
 CONFIG_USB_HOST=y
 CONFIG_USB_DWC2_HOST=y
 CONFIG_USB_DWC2_GADGET=y

@@ -108,4 +110,3 @@ CONFIG_FS_FAT=y
 CONFIG_FS_FAT_WRITE=y
 CONFIG_FS_FAT_LFN=y
 CONFIG_ZLIB=y
-CONFIG_LZO_DECOMPRESS=y
drivers/i2c/busses/Kconfig +4 -0
index 58f865606..766aa5edf 100644
@@ -17,6 +17,10 @@ config I2C_AT91
 	bool "AT91 I2C Master driver"
 	depends on ARCH_AT91
 
+config I2C_BCM283X
+	bool "BCM283X I2C Master driver"
+	depends on ARCH_BCM283X || COMPILE_TEST
+
 config I2C_IMX
 	bool "MPC85xx/MPC5200/i.MX I2C Master driver"
 	depends on ARCH_IMX || ARCH_MPC85XX || ARCH_MPC5200 || ARCH_LAYERSCAPE
drivers/i2c/busses/Makefile +1 -0
index a8661f605..a1ab46fb2 100644
@@ -1,5 +1,6 @@
 # SPDX-License-Identifier: GPL-2.0-only
 obj-$(CONFIG_I2C_AT91)		+= i2c-at91.o
+obj-$(CONFIG_I2C_BCM283X)	+= i2c-bcm283x.o
 obj-$(CONFIG_I2C_GPIO)		+= i2c-gpio.o
 obj-$(CONFIG_I2C_IMX)		+= i2c-imx.o
 lwl-$(CONFIG_I2C_IMX_EARLY)	+= i2c-imx-early.o
drivers/i2c/busses/i2c-bcm283x.c new file +327 -0

327 lines not on this page · raw message

Signature · 1 line
2.17.1
#1 lore raw
Quoted 4 lines · Daniel Brát

Add a driver to support the i2c host controller (BSC) found in Broadcom's bcm283x family of SoCs (used by rpi boards).

Signed-off-by Daniel Brát <[email protected]>
Quoted 8 lines
---
 arch/arm/configs/rpi_defconfig     |   3 +-
 arch/arm/configs/rpi_v8a_defconfig |   3 +-
 drivers/i2c/busses/Kconfig         |   4 +
 drivers/i2c/busses/Makefile        |   1 +
 drivers/i2c/busses/i2c-bcm283x.c   | 327 +++++++++++++++++++++++++++++
 5 files changed, 336 insertions(+), 2 deletions(-)
 create mode 100644 drivers/i2c/busses/i2c-bcm283x.c

Much better, thanks, applied.

Sascha

Signature · 4 lines
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