[PATCH 1/6 v4] serial: qcom: add support for GENI serial driver
Generic Interface (GENI) Serial Engine (SE) based uart can be found on newer qualcomm SOCs, starting from SDM845. Tested on Samsung SM-G9600(starqltechn) by chain-loading u-boot with stock bootloader. Signed-off-by: Dzmitry Sankouski Cc: Ramon Fried Cc: Tom Rini --- Changes for v2: - change functions return type to void, where possible - remove '.' from summary line Changes for v3: - move function open brace on new line - use tab between define name and value - define: wrap expression with braces, remove braces from constants Changes for v4: - add linux/delay.h header MAINTAINERS | 1 + .../serial/msm-geni-serial.txt| 6 + drivers/serial/Kconfig| 17 + drivers/serial/Makefile | 1 + drivers/serial/serial_msm_geni.c | 603 ++ 5 files changed, 628 insertions(+) create mode 100644 doc/device-tree-bindings/serial/msm-geni-serial.txt create mode 100644 drivers/serial/serial_msm_geni.c diff --git a/MAINTAINERS b/MAINTAINERS index 776ff703b9..52ddc99cda 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -390,6 +390,7 @@ F: drivers/gpio/msm_gpio.c F: drivers/mmc/msm_sdhci.c F: drivers/phy/msm8916-usbh-phy.c F: drivers/serial/serial_msm.c +F: drivers/serial/serial_msm_geni.c F: drivers/smem/msm_smem.c F: drivers/usb/host/ehci-msm.c diff --git a/doc/device-tree-bindings/serial/msm-geni-serial.txt b/doc/device-tree-bindings/serial/msm-geni-serial.txt new file mode 100644 index 00..9eadc2561b --- /dev/null +++ b/doc/device-tree-bindings/serial/msm-geni-serial.txt @@ -0,0 +1,6 @@ +Qualcomm GENI UART + +Required properties: +- compatible: must be "qcom,msm-geni-uart" +- reg: start address and size of the registers +- clock: interface clock (must accept baudrate as a frequency) diff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig index 93348c0929..b420a5720d 100644 --- a/drivers/serial/Kconfig +++ b/drivers/serial/Kconfig @@ -278,6 +278,14 @@ config DEBUG_UART_S5P will need to provide parameters to make this work. The driver will be available until the real driver-model serial is running. +config DEBUG_UART_MSM_GENI + bool "Qualcomm snapdragon" + depends on ARCH_SNAPDRAGON + help + Select this to enable a debug UART using the serial_msm driver. You + will need to provide parameters to make this work. The driver will + be available until the real driver-model serial is running. + config DEBUG_UART_MESON bool "Amlogic Meson" depends on MESON_SERIAL @@ -783,6 +791,15 @@ config MSM_SERIAL for example APQ8016 and MSM8916. Single baudrate is supported in current implementation (115200). +config MSM_GENI_SERIAL + bool "Qualcomm on-chip GENI UART" + help + Support UART based on Generic Interface (GENI) Serial Engine (SE), used on Qualcomm Snapdragon SoCs. + Should support all qualcomm SOCs with Qualcomm Universal Peripheral (QUP) Wrapper cores, + i.e. newer ones, starting from SDM845. + Driver works in FIFO mode. + Multiple baudrates supported. + config OCTEON_SERIAL_BOOTCMD bool "MIPS Octeon PCI remote bootcmd input" depends on ARCH_OCTEON diff --git a/drivers/serial/Makefile b/drivers/serial/Makefile index 3cbea8156f..d44caf4ea2 100644 --- a/drivers/serial/Makefile +++ b/drivers/serial/Makefile @@ -62,6 +62,7 @@ obj-$(CONFIG_PIC32_SERIAL) += serial_pic32.o obj-$(CONFIG_BCM283X_MU_SERIAL) += serial_bcm283x_mu.o obj-$(CONFIG_BCM283X_PL011_SERIAL) += serial_bcm283x_pl011.o obj-$(CONFIG_MSM_SERIAL) += serial_msm.o +obj-$(CONFIG_MSM_GENI_SERIAL) += serial_msm_geni.o obj-$(CONFIG_MVEBU_A3700_UART) += serial_mvebu_a3700.o obj-$(CONFIG_MPC8XX_CONS) += serial_mpc8xx.o obj-$(CONFIG_NULLDEV_SERIAL) += serial_nulldev.o diff --git a/drivers/serial/serial_msm_geni.c b/drivers/serial/serial_msm_geni.c new file mode 100644 index 00..c656d54cbb --- /dev/null +++ b/drivers/serial/serial_msm_geni.c @@ -0,0 +1,603 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Qualcomm GENI serial engine UART driver + * + * (C) Copyright 2021 Dzmitry Sankouski + * + * Based on Linux driver. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define UART_OVERSAMPLING 32 +#define STALE_TIMEOUT 160 +#define SE_UART_RX_STALE_CNT 0x294 +#define S_GENI_CMD_ABORT (BIT(1)) + +#define SE_GENI_S_CMD_CTRL_REG 0x634 +#define SE_GENI_M_CMD_CTRL_REG 0x604 + +/* GENI_M_CMD_CTRL_REG */ +#define M_GENI_CMD_CANCEL (BIT(2)) +#define M_GENI_CMD_ABORT (BIT(1)) +#define M_GENI_DISABLE (BIT(0)) + +/* GENI_S_CMD0 fields */ +#define S_OPCODE_MSK (GENMASK(31, 27)) +#define S_OPCODE_SHFT 27 +#define S_PARAMS_MSK (GENMASK(26, 0)) + +/* GENI_STATUS fields */ +#define M_GENI_CMD_ACTIVE (BIT(0)) +#def
[PATCH 1/6 v4] serial: qcom: add support for GENI serial driver
Generic Interface (GENI) Serial Engine (SE) based uart can be found on newer qualcomm SOCs, starting from SDM845. Tested on Samsung SM-G9600(starqltechn) by chain-loading u-boot with stock bootloader. Signed-off-by: Dzmitry Sankouski Cc: Ramon Fried Cc: Tom Rini --- Changes for v2: - change functions return type to void, where possible - remove '.' from summary line Changes for v3: - move function open brace on new line - use tab between define name and value - define: wrap expression with braces, remove braces from constants Changes for v4: - add linux/delay.h header MAINTAINERS | 1 + .../serial/msm-geni-serial.txt| 6 + drivers/serial/Kconfig| 17 + drivers/serial/Makefile | 1 + drivers/serial/serial_msm_geni.c | 603 ++ 5 files changed, 628 insertions(+) create mode 100644 doc/device-tree-bindings/serial/msm-geni-serial.txt create mode 100644 drivers/serial/serial_msm_geni.c diff --git a/MAINTAINERS b/MAINTAINERS index 776ff703b9..52ddc99cda 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -390,6 +390,7 @@ F: drivers/gpio/msm_gpio.c F: drivers/mmc/msm_sdhci.c F: drivers/phy/msm8916-usbh-phy.c F: drivers/serial/serial_msm.c +F: drivers/serial/serial_msm_geni.c F: drivers/smem/msm_smem.c F: drivers/usb/host/ehci-msm.c diff --git a/doc/device-tree-bindings/serial/msm-geni-serial.txt b/doc/device-tree-bindings/serial/msm-geni-serial.txt new file mode 100644 index 00..9eadc2561b --- /dev/null +++ b/doc/device-tree-bindings/serial/msm-geni-serial.txt @@ -0,0 +1,6 @@ +Qualcomm GENI UART + +Required properties: +- compatible: must be "qcom,msm-geni-uart" +- reg: start address and size of the registers +- clock: interface clock (must accept baudrate as a frequency) diff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig index 93348c0929..b420a5720d 100644 --- a/drivers/serial/Kconfig +++ b/drivers/serial/Kconfig @@ -278,6 +278,14 @@ config DEBUG_UART_S5P will need to provide parameters to make this work. The driver will be available until the real driver-model serial is running. +config DEBUG_UART_MSM_GENI + bool "Qualcomm snapdragon" + depends on ARCH_SNAPDRAGON + help + Select this to enable a debug UART using the serial_msm driver. You + will need to provide parameters to make this work. The driver will + be available until the real driver-model serial is running. + config DEBUG_UART_MESON bool "Amlogic Meson" depends on MESON_SERIAL @@ -783,6 +791,15 @@ config MSM_SERIAL for example APQ8016 and MSM8916. Single baudrate is supported in current implementation (115200). +config MSM_GENI_SERIAL + bool "Qualcomm on-chip GENI UART" + help + Support UART based on Generic Interface (GENI) Serial Engine (SE), used on Qualcomm Snapdragon SoCs. + Should support all qualcomm SOCs with Qualcomm Universal Peripheral (QUP) Wrapper cores, + i.e. newer ones, starting from SDM845. + Driver works in FIFO mode. + Multiple baudrates supported. + config OCTEON_SERIAL_BOOTCMD bool "MIPS Octeon PCI remote bootcmd input" depends on ARCH_OCTEON diff --git a/drivers/serial/Makefile b/drivers/serial/Makefile index 3cbea8156f..d44caf4ea2 100644 --- a/drivers/serial/Makefile +++ b/drivers/serial/Makefile @@ -62,6 +62,7 @@ obj-$(CONFIG_PIC32_SERIAL) += serial_pic32.o obj-$(CONFIG_BCM283X_MU_SERIAL) += serial_bcm283x_mu.o obj-$(CONFIG_BCM283X_PL011_SERIAL) += serial_bcm283x_pl011.o obj-$(CONFIG_MSM_SERIAL) += serial_msm.o +obj-$(CONFIG_MSM_GENI_SERIAL) += serial_msm_geni.o obj-$(CONFIG_MVEBU_A3700_UART) += serial_mvebu_a3700.o obj-$(CONFIG_MPC8XX_CONS) += serial_mpc8xx.o obj-$(CONFIG_NULLDEV_SERIAL) += serial_nulldev.o diff --git a/drivers/serial/serial_msm_geni.c b/drivers/serial/serial_msm_geni.c new file mode 100644 index 00..c656d54cbb --- /dev/null +++ b/drivers/serial/serial_msm_geni.c @@ -0,0 +1,603 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Qualcomm GENI serial engine UART driver + * + * (C) Copyright 2021 Dzmitry Sankouski + * + * Based on Linux driver. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define UART_OVERSAMPLING 32 +#define STALE_TIMEOUT 160 +#define SE_UART_RX_STALE_CNT 0x294 +#define S_GENI_CMD_ABORT (BIT(1)) + +#define SE_GENI_S_CMD_CTRL_REG 0x634 +#define SE_GENI_M_CMD_CTRL_REG 0x604 + +/* GENI_M_CMD_CTRL_REG */ +#define M_GENI_CMD_CANCEL (BIT(2)) +#define M_GENI_CMD_ABORT (BIT(1)) +#define M_GENI_DISABLE (BIT(0)) + +/* GENI_S_CMD0 fields */ +#define S_OPCODE_MSK (GENMASK(31, 27)) +#define S_OPCODE_SHFT 27 +#define S_PARAMS_MSK (GENMASK(26, 0)) + +/* GENI_STATUS fields */ +#define M_GENI_CMD_ACTIVE (BIT(0)) +#def
Re: [PATCH 1/6 v4] serial: qcom: add support for GENI serial driver
Hi Dzmitry, On Fri, 8 Oct 2021 at 00:46, Dzmitry Sankouski wrote: > > Generic Interface (GENI) Serial Engine (SE) based uart > can be found on newer qualcomm SOCs, starting from SDM845. > Tested on Samsung SM-G9600(starqltechn) > by chain-loading u-boot with stock bootloader. > > Signed-off-by: Dzmitry Sankouski > Cc: Ramon Fried > Cc: Tom Rini > --- > Changes for v2: > - change functions return type to void, where possible > - remove '.' from summary line > Changes for v3: > - move function open brace on new line > - use tab between define name and value > - define: wrap expression with braces, remove braces from constants > Changes for v4: > - add linux/delay.h header > > MAINTAINERS | 1 + > .../serial/msm-geni-serial.txt| 6 + > drivers/serial/Kconfig| 17 + > drivers/serial/Makefile | 1 + > drivers/serial/serial_msm_geni.c | 603 ++ > 5 files changed, 628 insertions(+) > create mode 100644 doc/device-tree-bindings/serial/msm-geni-serial.txt > create mode 100644 drivers/serial/serial_msm_geni.c Reviewed-by: Simon Glass Some nits below > > diff --git a/MAINTAINERS b/MAINTAINERS > index 776ff703b9..52ddc99cda 100644 > --- a/MAINTAINERS > +++ b/MAINTAINERS > @@ -390,6 +390,7 @@ F: drivers/gpio/msm_gpio.c > F: drivers/mmc/msm_sdhci.c > F: drivers/phy/msm8916-usbh-phy.c > F: drivers/serial/serial_msm.c > +F: drivers/serial/serial_msm_geni.c > F: drivers/smem/msm_smem.c > F: drivers/usb/host/ehci-msm.c > > diff --git a/doc/device-tree-bindings/serial/msm-geni-serial.txt > b/doc/device-tree-bindings/serial/msm-geni-serial.txt > new file mode 100644 > index 00..9eadc2561b > --- /dev/null > +++ b/doc/device-tree-bindings/serial/msm-geni-serial.txt > @@ -0,0 +1,6 @@ > +Qualcomm GENI UART > + > +Required properties: > +- compatible: must be "qcom,msm-geni-uart" > +- reg: start address and size of the registers > +- clock: interface clock (must accept baudrate as a frequency) > diff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig > index 93348c0929..b420a5720d 100644 > --- a/drivers/serial/Kconfig > +++ b/drivers/serial/Kconfig > @@ -278,6 +278,14 @@ config DEBUG_UART_S5P > will need to provide parameters to make this work. The driver will > be available until the real driver-model serial is running. > > +config DEBUG_UART_MSM_GENI Do you need this? Most drivers just use the existing DEBUG_UART Kconfig. > + bool "Qualcomm snapdragon" > + depends on ARCH_SNAPDRAGON > + help > + Select this to enable a debug UART using the serial_msm driver. You > + will need to provide parameters to make this work. The driver will > + be available until the real driver-model serial is running. > + > config DEBUG_UART_MESON > bool "Amlogic Meson" > depends on MESON_SERIAL > @@ -783,6 +791,15 @@ config MSM_SERIAL > for example APQ8016 and MSM8916. > Single baudrate is supported in current implementation (115200). > > +config MSM_GENI_SERIAL > + bool "Qualcomm on-chip GENI UART" > + help > + Support UART based on Generic Interface (GENI) Serial Engine (SE), > used on Qualcomm Snapdragon SoCs. > + Should support all qualcomm SOCs with Qualcomm Universal Peripheral > (QUP) Wrapper cores, 80cols > + i.e. newer ones, starting from SDM845. > + Driver works in FIFO mode. > + Multiple baudrates supported. > + > config OCTEON_SERIAL_BOOTCMD > bool "MIPS Octeon PCI remote bootcmd input" > depends on ARCH_OCTEON > diff --git a/drivers/serial/Makefile b/drivers/serial/Makefile > index 3cbea8156f..d44caf4ea2 100644 > --- a/drivers/serial/Makefile > +++ b/drivers/serial/Makefile > @@ -62,6 +62,7 @@ obj-$(CONFIG_PIC32_SERIAL) += serial_pic32.o > obj-$(CONFIG_BCM283X_MU_SERIAL) += serial_bcm283x_mu.o > obj-$(CONFIG_BCM283X_PL011_SERIAL) += serial_bcm283x_pl011.o > obj-$(CONFIG_MSM_SERIAL) += serial_msm.o > +obj-$(CONFIG_MSM_GENI_SERIAL) += serial_msm_geni.o > obj-$(CONFIG_MVEBU_A3700_UART) += serial_mvebu_a3700.o > obj-$(CONFIG_MPC8XX_CONS) += serial_mpc8xx.o > obj-$(CONFIG_NULLDEV_SERIAL) += serial_nulldev.o > diff --git a/drivers/serial/serial_msm_geni.c > b/drivers/serial/serial_msm_geni.c > new file mode 100644 > index 00..c656d54cbb > --- /dev/null > +++ b/drivers/serial/serial_msm_geni.c > @@ -0,0 +1,603 @@ > +// SPDX-License-Identifier: GPL-2.0+ > +/* > + * Qualcomm GENI serial engine UART driver > + * > + * (C) Copyright 2021 Dzmitry Sankouski > + * > + * Based on Linux driver. > + */ > + > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > + > +#define UART_OVERSAMPLING 32 > +#define STALE_TIMEOUT 160 > +#define SE_UART_RX_STALE_CNT 0x294 > +#define S_GEN
Re: [PATCH 1/6 v4] serial: qcom: add support for GENI serial driver
чт, 14 окт. 2021 г. в 18:10, Simon Glass : > Hi Dzmitry, > > On Fri, 8 Oct 2021 at 00:46, Dzmitry Sankouski > wrote: > > > > Generic Interface (GENI) Serial Engine (SE) based uart > > can be found on newer qualcomm SOCs, starting from SDM845. > > Tested on Samsung SM-G9600(starqltechn) > > by chain-loading u-boot with stock bootloader. > > > > Signed-off-by: Dzmitry Sankouski > > Cc: Ramon Fried > > Cc: Tom Rini > > --- > > Changes for v2: > > - change functions return type to void, where possible > > - remove '.' from summary line > > Changes for v3: > > - move function open brace on new line > > - use tab between define name and value > > - define: wrap expression with braces, remove braces from constants > > Changes for v4: > > - add linux/delay.h header > > > > MAINTAINERS | 1 + > > .../serial/msm-geni-serial.txt| 6 + > > drivers/serial/Kconfig| 17 + > > drivers/serial/Makefile | 1 + > > drivers/serial/serial_msm_geni.c | 603 ++ > > 5 files changed, 628 insertions(+) > > create mode 100644 doc/device-tree-bindings/serial/msm-geni-serial.txt > > create mode 100644 drivers/serial/serial_msm_geni.c > > Reviewed-by: Simon Glass > > Some nits below > > > > > diff --git a/MAINTAINERS b/MAINTAINERS > > index 776ff703b9..52ddc99cda 100644 > > --- a/MAINTAINERS > > +++ b/MAINTAINERS > > @@ -390,6 +390,7 @@ F: drivers/gpio/msm_gpio.c > > F: drivers/mmc/msm_sdhci.c > > F: drivers/phy/msm8916-usbh-phy.c > > F: drivers/serial/serial_msm.c > > +F: drivers/serial/serial_msm_geni.c > > F: drivers/smem/msm_smem.c > > F: drivers/usb/host/ehci-msm.c > > > > diff --git a/doc/device-tree-bindings/serial/msm-geni-serial.txt > b/doc/device-tree-bindings/serial/msm-geni-serial.txt > > new file mode 100644 > > index 00..9eadc2561b > > --- /dev/null > > +++ b/doc/device-tree-bindings/serial/msm-geni-serial.txt > > @@ -0,0 +1,6 @@ > > +Qualcomm GENI UART > > + > > +Required properties: > > +- compatible: must be "qcom,msm-geni-uart" > > +- reg: start address and size of the registers > > +- clock: interface clock (must accept baudrate as a frequency) > > diff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig > > index 93348c0929..b420a5720d 100644 > > --- a/drivers/serial/Kconfig > > +++ b/drivers/serial/Kconfig > > @@ -278,6 +278,14 @@ config DEBUG_UART_S5P > > will need to provide parameters to make this work. The driver > will > > be available until the real driver-model serial is running. > > > > +config DEBUG_UART_MSM_GENI > > Do you need this? Most drivers just use the existing DEBUG_UART Kconfig. > Documentation for CONFIG_DEBUG_UART says: `- Enable the CONFIG for your UART to tell it to provide this interface (e.g. CONFIG_DEBUG_UART_NS16550)` Debug functionality is controlled by chip specific CONFIG_DEBUG_UART_*. So no serial driver uses plain DEBUG_UART for adding debug functionality. > > + bool "Qualcomm snapdragon" > > + depends on ARCH_SNAPDRAGON > > + help > > + Select this to enable a debug UART using the serial_msm > driver. You > > + will need to provide parameters to make this work. The driver > will > > + be available until the real driver-model serial is running. > > + > > config DEBUG_UART_MESON > > bool "Amlogic Meson" > > depends on MESON_SERIAL > > @@ -783,6 +791,15 @@ config MSM_SERIAL > > for example APQ8016 and MSM8916. > > Single baudrate is supported in current implementation > (115200). > > > > +config MSM_GENI_SERIAL > > + bool "Qualcomm on-chip GENI UART" > > + help > > + Support UART based on Generic Interface (GENI) Serial Engine > (SE), used on Qualcomm Snapdragon SoCs. > > + Should support all qualcomm SOCs with Qualcomm Universal > Peripheral (QUP) Wrapper cores, > > 80cols > > > + i.e. newer ones, starting from SDM845. > > + Driver works in FIFO mode. > > + Multiple baudrates supported. > > + > > config OCTEON_SERIAL_BOOTCMD > > bool "MIPS Octeon PCI remote bootcmd input" > > depends on ARCH_OCTEON > > diff --git a/drivers/serial/Makefile b/drivers/serial/Makefile > > index 3cbea8156f..d44caf4ea2 100644 > > --- a/drivers/serial/Makefile > > +++ b/drivers/serial/Makefile > > @@ -62,6 +62,7 @@ obj-$(CONFIG_PIC32_SERIAL) += serial_pic32.o > > obj-$(CONFIG_BCM283X_MU_SERIAL) += serial_bcm283x_mu.o > > obj-$(CONFIG_BCM283X_PL011_SERIAL) += serial_bcm283x_pl011.o > > obj-$(CONFIG_MSM_SERIAL) += serial_msm.o > > +obj-$(CONFIG_MSM_GENI_SERIAL) += serial_msm_geni.o > > obj-$(CONFIG_MVEBU_A3700_UART) += serial_mvebu_a3700.o > > obj-$(CONFIG_MPC8XX_CONS) += serial_mpc8xx.o > > obj-$(CONFIG_NULLDEV_SERIAL) += serial_nulldev.o > > diff --git a/drivers/serial/serial_msm_geni.c > b/drivers/serial/serial_msm_geni.c > > new file mode 100644
Re: [PATCH 1/6 v4] serial: qcom: add support for GENI serial driver
Hi Dzmitry, On Fri, 15 Oct 2021 at 10:22, Dzmitry Sankouski wrote: > > > чт, 14 окт. 2021 г. в 18:10, Simon Glass : >> >> Hi Dzmitry, >> >> On Fri, 8 Oct 2021 at 00:46, Dzmitry Sankouski wrote: >> > >> > Generic Interface (GENI) Serial Engine (SE) based uart >> > can be found on newer qualcomm SOCs, starting from SDM845. >> > Tested on Samsung SM-G9600(starqltechn) >> > by chain-loading u-boot with stock bootloader. >> > >> > Signed-off-by: Dzmitry Sankouski >> > Cc: Ramon Fried >> > Cc: Tom Rini >> > --- >> > Changes for v2: >> > - change functions return type to void, where possible >> > - remove '.' from summary line >> > Changes for v3: >> > - move function open brace on new line >> > - use tab between define name and value >> > - define: wrap expression with braces, remove braces from constants >> > Changes for v4: >> > - add linux/delay.h header >> > >> > MAINTAINERS | 1 + >> > .../serial/msm-geni-serial.txt| 6 + >> > drivers/serial/Kconfig| 17 + >> > drivers/serial/Makefile | 1 + >> > drivers/serial/serial_msm_geni.c | 603 ++ >> > 5 files changed, 628 insertions(+) >> > create mode 100644 doc/device-tree-bindings/serial/msm-geni-serial.txt >> > create mode 100644 drivers/serial/serial_msm_geni.c >> >> Reviewed-by: Simon Glass >> >> Some nits below >> >> > >> > diff --git a/MAINTAINERS b/MAINTAINERS >> > index 776ff703b9..52ddc99cda 100644 >> > --- a/MAINTAINERS >> > +++ b/MAINTAINERS >> > @@ -390,6 +390,7 @@ F: drivers/gpio/msm_gpio.c >> > F: drivers/mmc/msm_sdhci.c >> > F: drivers/phy/msm8916-usbh-phy.c >> > F: drivers/serial/serial_msm.c >> > +F: drivers/serial/serial_msm_geni.c >> > F: drivers/smem/msm_smem.c >> > F: drivers/usb/host/ehci-msm.c >> > >> > diff --git a/doc/device-tree-bindings/serial/msm-geni-serial.txt >> > b/doc/device-tree-bindings/serial/msm-geni-serial.txt >> > new file mode 100644 >> > index 00..9eadc2561b >> > --- /dev/null >> > +++ b/doc/device-tree-bindings/serial/msm-geni-serial.txt >> > @@ -0,0 +1,6 @@ >> > +Qualcomm GENI UART >> > + >> > +Required properties: >> > +- compatible: must be "qcom,msm-geni-uart" >> > +- reg: start address and size of the registers >> > +- clock: interface clock (must accept baudrate as a frequency) >> > diff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig >> > index 93348c0929..b420a5720d 100644 >> > --- a/drivers/serial/Kconfig >> > +++ b/drivers/serial/Kconfig >> > @@ -278,6 +278,14 @@ config DEBUG_UART_S5P >> > will need to provide parameters to make this work. The driver >> > will >> > be available until the real driver-model serial is running. >> > >> > +config DEBUG_UART_MSM_GENI >> >> Do you need this? Most drivers just use the existing DEBUG_UART Kconfig. > > > Documentation for CONFIG_DEBUG_UART says: > `- Enable the CONFIG for your UART to tell it to provide this interface >(e.g. CONFIG_DEBUG_UART_NS16550)` > Debug functionality is controlled by chip specific CONFIG_DEBUG_UART_*. > So no serial driver uses plain DEBUG_UART for adding debug functionality. Ah yes. Well I suppose I am allow to forgot something I wrote 6 years ago. For my own information, the reason is basically because we can only have one debug UART, but can have multiple UART drivers with driver model. So we need to select which to use as a debug UART. It is a bit unfortunate, since in the vast majority of cases, we only have a single UART driver in use. Regards, Simon
