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[v3,0/2] i2c: exynos5: add support for ExynosAutov9 SoC

Message ID 20211112010137.149174-1-jaewon02.kim@samsung.com
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Series i2c: exynos5: add support for ExynosAutov9 SoC | expand

Message

Jaewon Kim Nov. 12, 2021, 1:01 a.m. UTC 
Serial IPs(UART, I2C, SPI) are integrated into New IP-Core
called USI(Universal Serial Interface).

As it is integrated into USI, there are additinal HW changes.
Registers to control USI and sysreg to set serial IPs have been added.
Also, some timing registres have been changed.

Changes in v3:
 - Changes has_usi variable type
 - Changes comment style

Changes in v2:
 - Changes compatible name to "samsung,exynosautov9-hsi2c"
 - Changes I2C type name to "I2C_TYPE_EXYNOSAUTOV9" from "I2C_TYPE_USI"
 - Changes to clear after reset instread of clearing reset
 - Add description about system register for USI
 - fix typo in description

Jaewon Kim (2):
  dt-bindings: i2c: exynos5: add exynosautov9-hsi2c compatible
  i2c: exynos5: add support for ExynosAutov9 SoC

 .../devicetree/bindings/i2c/i2c-exynos5.txt   |   7 +
 drivers/i2c/busses/i2c-exynos5.c              | 135 ++++++++++++++++--
 2 files changed, 132 insertions(+), 10 deletions(-)

Comments

Sam Protsenko Nov. 15, 2021, 6:56 p.m. UTC | #1 
On Fri, 12 Nov 2021 at 03:06, Jaewon Kim <jaewon02.kim@samsung.com> wrote:
>
> This patch adds new "samsung,exynosautov9-hsi2c" compatible.
> It is for i2c compatible with HSI2C available on Exynos SoC with USI.
>
> Signed-off-by: Jaewon Kim <jaewon02.kim@samsung.com>
> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
> ---

Reviewed-by: Sam Protsenko <semen.protsenko@linaro.org>

>  Documentation/devicetree/bindings/i2c/i2c-exynos5.txt | 7 +++++++
>  1 file changed, 7 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/i2c/i2c-exynos5.txt b/Documentation/devicetree/bindings/i2c/i2c-exynos5.txt
> index 2dbc0b62daa6..39f4067d9d1f 100644
> --- a/Documentation/devicetree/bindings/i2c/i2c-exynos5.txt
> +++ b/Documentation/devicetree/bindings/i2c/i2c-exynos5.txt
> @@ -14,6 +14,8 @@ Required properties:
>                                 on Exynos5260 SoCs.
>         -> "samsung,exynos7-hsi2c", for i2c compatible with HSI2C available
>                                 on Exynos7 SoCs.
> +       -> "samsung,exynosautov9-hsi2c", for i2c compatible with HSI2C available
> +                               on ExynosAutov9 SoCs.
>
>    - reg: physical base address of the controller and length of memory mapped
>      region.
> @@ -31,6 +33,11 @@ Optional properties:
>         at 100khz.
>      -> If specified, the bus operates in high-speed mode only if the
>         clock-frequency is >= 1Mhz.
> +  - samsung,sysreg : system registers controller phandle to control USI.
> +    -> If I2C integrated to USI(Universal Serial Interface), this property
> +       is required. When using Exynos USI block, it needs to select which type
> +       of Serial IPs(UART, SPI, I2C) to use with system register. So, it
> +       requires samsung,sysreg phandle and offset value of system register.
>
>  Example:
>
> --
> 2.33.1
>