Re: [PATCH v2 11/11] i2c: npcm: Support NPCM845

[Tyrone Ting <warp5tw@gmail.com>]

Hi Krzysztof:

Thank you for your comments and they'll be addressed.

Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com> 於 2022年2月20日
週日 下午5:36寫道：
>
> On 20/02/2022 04:53, Tyrone Ting wrote:
> > From: Tyrone Ting <kfting@nuvoton.com>
> >
> > Add NPCM8XX I2C support.
> > The NPCM8XX uses a similar i2c module as NPCM7XX.
> > The internal HW FIFO is larger in NPCM8XX.
> >
> > Signed-off-by: Tyrone Ting <kfting@nuvoton.com>
> > Signed-off-by: Tali Perry <tali.perry1@gmail.com>
> > ---
> >  drivers/i2c/busses/Kconfig       |  8 +--
> >  drivers/i2c/busses/Makefile      |  2 +-
> >  drivers/i2c/busses/i2c-npcm7xx.c | 87 ++++++++++++++++++++++----------
> >  3 files changed, 66 insertions(+), 31 deletions(-)
> >
> > diff --git a/drivers/i2c/busses/Kconfig b/drivers/i2c/busses/Kconfig
> > index 42da31c1ab70..ab9ee2de5e00 100644
> > --- a/drivers/i2c/busses/Kconfig
> > +++ b/drivers/i2c/busses/Kconfig
> > @@ -817,13 +817,13 @@ config I2C_NOMADIK
> >         I2C interface from ST-Ericsson's Nomadik and Ux500 architectures,
> >         as well as the STA2X11 PCIe I/O HUB.
> >
> > -config I2C_NPCM7XX
> > +config I2C_NPCM
> >       tristate "Nuvoton I2C Controller"
> > -     depends on ARCH_NPCM7XX || COMPILE_TEST
> > +     depends on ARCH_NPCM || COMPILE_TEST
> >       help
> >         If you say yes to this option, support will be included for the
> > -       Nuvoton I2C controller, which is available on the NPCM7xx BMC
> > -       controller.
> > +       Nuvoton I2C controller, which is available on the NPCM BMC
> > +       controllers.
> >         Driver can also support slave mode (select I2C_SLAVE).
> >
> >  config I2C_OCORES
> > diff --git a/drivers/i2c/busses/Makefile b/drivers/i2c/busses/Makefile
> > index 1d00dce77098..01fdf74a5565 100644
> > --- a/drivers/i2c/busses/Makefile
> > +++ b/drivers/i2c/busses/Makefile
> > @@ -80,7 +80,7 @@ obj-$(CONFIG_I2C_MT7621)    += i2c-mt7621.o
> >  obj-$(CONFIG_I2C_MV64XXX)    += i2c-mv64xxx.o
> >  obj-$(CONFIG_I2C_MXS)                += i2c-mxs.o
> >  obj-$(CONFIG_I2C_NOMADIK)    += i2c-nomadik.o
> > -obj-$(CONFIG_I2C_NPCM7XX)    += i2c-npcm7xx.o
> > +obj-$(CONFIG_I2C_NPCM)               += i2c-npcm7xx.o
> >  obj-$(CONFIG_I2C_OCORES)     += i2c-ocores.o
> >  obj-$(CONFIG_I2C_OMAP)               += i2c-omap.o
> >  obj-$(CONFIG_I2C_OWL)                += i2c-owl.o
> > diff --git a/drivers/i2c/busses/i2c-npcm7xx.c b/drivers/i2c/busses/i2c-npcm7xx.c
> > index 2cbf9c679aed..b281e0424e3e 100644
> > --- a/drivers/i2c/busses/i2c-npcm7xx.c
> > +++ b/drivers/i2c/busses/i2c-npcm7xx.c
> > @@ -17,6 +17,7 @@
> >  #include <linux/mfd/syscon.h>
> >  #include <linux/module.h>
> >  #include <linux/of.h>
> > +#include <linux/of_device.h>
> >  #include <linux/platform_device.h>
> >  #include <linux/regmap.h>
> >
> > @@ -91,7 +92,7 @@ enum i2c_addr {
> >
> >  /* init register and default value required to enable module */
> >  #define NPCM_I2CSEGCTL                       0xE4
> > -#define NPCM_I2CSEGCTL_INIT_VAL              0x0333F000
> > +#define NPCM_I2CSEGCTL_INIT_VAL              bus->data->segctl_init_val
> >
> >  /* Common regs */
> >  #define NPCM_I2CSDA                  0x00
> > @@ -228,8 +229,7 @@ static const int npcm_i2caddr[I2C_NUM_OWN_ADDR] = {
> >  #define NPCM_I2CFIF_CTS_CLR_FIFO     BIT(6)
> >  #define NPCM_I2CFIF_CTS_SLVRSTR              BIT(7)
> >
> > -/* NPCM_I2CTXF_CTL reg fields */
> > -#define NPCM_I2CTXF_CTL_TX_THR               GENMASK(4, 0)
> > +/* NPCM_I2CTXF_CTL reg field */
> >  #define NPCM_I2CTXF_CTL_THR_TXIE     BIT(6)
> >
> >  /* NPCM_I2CT_OUT reg fields */
> > @@ -238,22 +238,22 @@ static const int npcm_i2caddr[I2C_NUM_OWN_ADDR] = {
> >  #define NPCM_I2CT_OUT_T_OUTST                BIT(7)
> >
> >  /* NPCM_I2CTXF_STS reg fields */
> > -#define NPCM_I2CTXF_STS_TX_BYTES     GENMASK(4, 0)
> > +#define NPCM_I2CTXF_STS_TX_BYTES     bus->data->txf_sts_tx_bytes
>
> It's not a clean code to use defines for complex types. It's not a
> constant anymore, so just use bus->data->txf_sts_tx_bytes directly.
>
> The same in other places.
>
> >  #define NPCM_I2CTXF_STS_TX_THST              BIT(6)
> >
>
> Best regards,
> Krzysztof

Best regards,
Tyrone