[U-Boot] [EXT] Re: [PATCH 2/5] dm: spi: Convert Freescale ESPI driver to driver model

Chuanhua Han chuanhua.han at nxp.com
Mon May 6 06:59:22 UTC 2019



> -----Original Message-----
> From: Jagan Teki <jagan at amarulasolutions.com>
> Sent: 2019年4月26日 2:07
> To: Chuanhua Han <chuanhua.han at nxp.com>
> Cc: Jagan Teki <jagan at openedev.com>; Wolfgang Denk <wd at denx.de>;
> Shengzhou Liu <shengzhou.liu at nxp.com>; Ruchika Gupta
> <ruchika.gupta at nxp.com>; U-Boot-Denx <u-boot at lists.denx.de>; Jiafei Pan
> <jiafei.pan at nxp.com>; Yinbo Zhu <yinbo.zhu at nxp.com>
> Subject: Re: [EXT] Re: [U-Boot] [PATCH 2/5] dm: spi: Convert Freescale ESPI
> driver to driver model
> 
> Caution: EXT Email
> 
> On Thu, Apr 25, 2019 at 8:27 AM Chuanhua Han <chuanhua.han at nxp.com>
> wrote:
> >
> > Hi,jagan
> > Thank you for your replay!
> >
> > > -----Original Message-----
> > > From: Jagan Teki <jagan at amarulasolutions.com>
> > > Sent: 2019年4月24日 14:57
> > > To: Chuanhua Han <chuanhua.han at nxp.com>
> > > Cc: Jagan Teki <jagan at openedev.com>; Wolfgang Denk <wd at denx.de>;
> > > Shengzhou Liu <shengzhou.liu at nxp.com>; Ruchika Gupta
> > > <ruchika.gupta at nxp.com>; U-Boot-Denx <u-boot at lists.denx.de>; Jiafei
> > > Pan <jiafei.pan at nxp.com>; Yinbo Zhu <yinbo.zhu at nxp.com>
> > > Subject: [EXT] Re: [U-Boot] [PATCH 2/5] dm: spi: Convert Freescale
> > > ESPI driver to driver model
> > >
> > > WARNING: This email was created outside of NXP. DO NOT CLICK links
> > > or attachments unless you recognize the sender and know the content is
> safe.
> > >
> > >
> > >
> > > On Tue, Apr 23, 2019 at 4:17 PM Chuanhua Han
> <chuanhua.han at nxp.com>
> > > wrote:
> > > >
> > > > Modify the Freescale ESPI driver to support the driver model.
> > > > Also resolved the following problems:
> > > >
> > > > ===================== WARNING ====================== This board
> > > does
> > > > not use CONFIG_DM_SPI. Please update the board before v2019.04 for
> > > > no dm conversion and v2019.07 for partially dm converted drivers.
> > > > Failure to update can lead to driver/board removal See
> > > > doc/driver-model/MIGRATION.txt for more info.
> > > > ====================================================
> > > > ===================== WARNING ====================== This board
> > > does
> > > > not use CONFIG_DM_SPI_FLASH. Please update the board to use
> > > > CONFIG_SPI_FLASH before the v2019.07 release.
> > > > Failure to update by the deadline may result in board removal.
> > > > See doc/driver-model/MIGRATION.txt for more info.
> > > > ====================================================
> > > >
> > > > Signed-off-by: Chuanhua Han <chuanhua.han at nxp.com>
> > > > ---
> > > > depends on:
> > > >         -
> > > > https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2F
> > > > patc
> > > >
> > >
> hwork.ozlabs.org%2Fproject%2Fuboot%2Flist%2F%3Fseries%3D99439&d
> > > ata
> > > >
> > >
> =02%7C01%7Cchuanhua.han%40nxp.com%7Cfa6bdd7859c4411b5d8608d6c8
> > > 8223e3%7
> > > >
> > >
> C686ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C1%7C63691685860819371
> > > 5&sda
> > > >
> > >
> ta=437CqPexTmJAzhl7wZ3lAUQVbmy%2B2NvHlurTcGTJKT0%3D&reserve
> > > d=0
> > > >
> > > >  drivers/spi/fsl_espi.c | 450
> > > > +++++++++++++++++++++++++++++------------
> > > >  1 file changed, 316 insertions(+), 134 deletions(-)
> > > >
> > > > diff --git a/drivers/spi/fsl_espi.c b/drivers/spi/fsl_espi.c index
> > > > 7444ae1a06..6ebe57c30b 100644
> > > > --- a/drivers/spi/fsl_espi.c
> > > > +++ b/drivers/spi/fsl_espi.c
> > > > @@ -4,17 +4,27 @@
> > > >   *
> > > >   * Copyright 2010-2011 Freescale Semiconductor, Inc.
> > > >   * Author: Mingkai Hu (Mingkai.hu at freescale.com)
> > > > + *        Chuanhua Han (chuanhua.han at nxp.com)
> > > >   */
> > > >
> > > >  #include <common.h>
> > > > -
> > > >  #include <malloc.h>
> > > >  #include <spi.h>
> > > >  #include <asm/immap_85xx.h>
> > > > +#include <dm.h>
> > > > +#include <errno.h>
> > > > +#include <fdtdec.h>
> > > > +
> > > > +struct fsl_espi_platdata {
> > > > +       uint flags;
> > > > +       uint speed_hz;
> > > > +       uint num_chipselect;
> > > > +       fdt_addr_t regs_addr;
> > > > +};
> > > >
> > > > -struct fsl_spi_slave {
> > > > -       struct spi_slave slave;
> > > > +struct fsl_espi_priv {
> > > >         ccsr_espi_t     *espi;
> > > > +       u32 speed_hz;
> > > >         unsigned int    div16;
> > > >         unsigned int    pm;
> > > >         int             tx_timeout;
> > > > @@ -25,9 +35,18 @@ struct fsl_spi_slave {
> > > >         unsigned int    max_transfer_length;
> > > >  };
> > > >
> > > > +struct fsl_spi_slave {
> > > > +       struct spi_slave slave;
> > > > +       struct fsl_espi_priv priv; };
> > > > +
> > > >  #define to_fsl_spi_slave(s) container_of(s, struct fsl_spi_slave,
> > > > slave)
> > > > +#define to_fsl_spi_priv(p) container_of(p, struct fsl_spi_slave,
> > > > +priv)
> > > >  #define US_PER_SECOND          1000000UL
> > > >
> > > > +/* default SCK frequency, unit: HZ */
> > > > +#define FSL_ESPI_DEFAULT_SCK_FREQ   10000000
> > > > +
> > > >  #define ESPI_MAX_CS_NUM                4
> > > >  #define ESPI_FIFO_WIDTH_BIT    32
> > > >
> > > > @@ -62,121 +81,46 @@ struct fsl_spi_slave {
> > > >
> > > >  #define ESPI_MAX_DATA_TRANSFER_LEN 0xFFF0
> > > >
> > > > -struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
> > > > -               unsigned int max_hz, unsigned int mode)
> > > > -{
> > > > -       struct fsl_spi_slave *fsl;
> > > > -       sys_info_t sysinfo;
> > > > -       unsigned long spibrg = 0;
> > > > -       unsigned long spi_freq = 0;
> > > > -       unsigned char pm = 0;
> > > > -
> > > > -       if (!spi_cs_is_valid(bus, cs))
> > > > -               return NULL;
> > > > -
> > > > -       fsl = spi_alloc_slave(struct fsl_spi_slave, bus, cs);
> > > > -       if (!fsl)
> > > > -               return NULL;
> > > > -
> > > > -       fsl->espi = (void *)(CONFIG_SYS_MPC85xx_ESPI_ADDR);
> > > > -       fsl->mode = mode;
> > > > -       fsl->max_transfer_length = ESPI_MAX_DATA_TRANSFER_LEN;
> > > > -
> > > > -       /* Set eSPI BRG clock source */
> > > > -       get_sys_info(&sysinfo);
> > > > -       spibrg = sysinfo.freq_systembus / 2;
> > > > -       fsl->div16 = 0;
> > > > -       if ((spibrg / max_hz) > 32) {
> > > > -               fsl->div16 = ESPI_CSMODE_DIV16;
> > > > -               pm = spibrg / (max_hz * 16 * 2);
> > > > -               if (pm > 16) {
> > > > -                       pm = 16;
> > > > -                       debug("Requested speed is too low: %d
> Hz, %ld
> > > Hz "
> > > > -                               "is used.\n", max_hz, spibrg / (32 *
> 16));
> > > > -               }
> > > > -       } else
> > > > -               pm = spibrg / (max_hz * 2);
> > > > -       if (pm)
> > > > -               pm--;
> > > > -       fsl->pm = pm;
> > > > -
> > > > -       if (fsl->div16)
> > > > -               spi_freq = spibrg / ((pm + 1) * 2 * 16);
> > > > -       else
> > > > -               spi_freq = spibrg / ((pm + 1) * 2);
> > > > -
> > > > -       /* set tx_timeout to 10 times of one espi FIFO entry go out */
> > > > -       fsl->tx_timeout = DIV_ROUND_UP((US_PER_SECOND *
> > > ESPI_FIFO_WIDTH_BIT
> > > > -                               * 10), spi_freq);
> > > > -
> > > > -       return &fsl->slave;
> > > > -}
> > > > -
> > > > -void spi_free_slave(struct spi_slave *slave)
> > > > +#ifndef CONFIG_DM_SPI
> > >
> > > Would you try for full dm-conversion? it would be hard to move all
> > > respective defconfigs to use but better try since we have next
> > > version deadline for full dm-conversion. thanks!
> > Currently my espi driver is modified to be compatible with dm
> > configuration and non-dm configuration.
> > If uboot don't need non-dm code in the future, I will remove this
> > compatibility and only keep the dm driver code. Thank you.
> 
> Idea is to make fully dm supported and ie what we have migration deadline,
> doc/driver-model/MIGRATION.txt
Do you mean that I need to delete the original non-dm code?
Or there are some values in the dm code that do not come from dts! 
Can you tell me something about it? Thank you!


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