On Fri, 2017-04-14 at 16:01 +0200, Marek Vasut wrote:
> On 03/14/2017 04:28 PM, Sylvain Lemieux wrote:
> > From: Liam Beguin <lbeg...@tycoint.com>
> >
> > Add DM support for i2c functions.
> >
> > Signed-off-by: Liam Beguin <lbeg...@tycoint.com>
> > Signed-off-by: Sylvain Lemieux <slemi...@tycoint.com>
> > ---
> > Note:
> > * This patch is require as part of the DM support of the LPC32xx I2C driver.
> > All I2C drivers should be converted, to DM, by the end of June 2017.
> >
> > * The USB driver is supporting the DM and non-DM API.
> >
> > * This patch depend on the following patchset:
> > https://lists.denx.de/pipermail/u-boot/2017-March/283672.html
> >
> > drivers/usb/host/ohci-lpc32xx.c | 33 +++++++++++++++++++++++++++++++--
> > 1 file changed, 31 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/usb/host/ohci-lpc32xx.c
> > b/drivers/usb/host/ohci-lpc32xx.c
> > index 9245126ed6..51be4c90c7 100644
> > --- a/drivers/usb/host/ohci-lpc32xx.c
> > +++ b/drivers/usb/host/ohci-lpc32xx.c
> > @@ -14,8 +14,10 @@
> > #include <asm/io.h>
> > #include <asm/arch/cpu.h>
> > #include <asm/arch/clk.h>
> > +#include <asm/arch/i2c.h>
> > #include <usb.h>
> > #include <i2c.h>
> > +#include <dm.h>
> >
> > /* OTG I2C controller module register structures */
> > struct otgi2c_regs {
> > @@ -83,12 +85,35 @@ static struct clk_pm_regs *clk_pwr = (struct
> > clk_pm_regs *)CLK_PM_BASE;
> >
> > static int isp1301_set_value(int reg, u8 value)
> > {
> > +#ifndef CONFIG_DM_I2C
> > return i2c_write(ISP1301_I2C_ADDR, reg, 1, &value, 1);
> > +#else
> > + struct udevice *dev;
> > + int ret;
> > +
> > + ret = i2c_get_chip_for_busnum(I2C_2, ISP1301_I2C_ADDR,
> > + 1, &dev);
>
> I'd rather see you passing udevice around than requesting it on each
> single i2c write.
>
Will do the change and submit a version 2.
> > + if (ret)
> > + return ret;
> > +
> > + return dm_i2c_write(dev, reg, &value, 1);
> > +#endif
> > }
> >
> > -static void isp1301_configure(void)
> > +static int isp1301_configure(void)
> > {
> > +#ifndef CONFIG_DM_I2C
> > i2c_set_bus_num(I2C_2);
> > +#else
> > + int ret;
> > + struct udevice *bus;
> > +
> > + ret = uclass_get_device_by_seq(UCLASS_I2C, I2C_2, &bus);
> > + if (ret) {
> > + debug("%s: No bus %d\n", __func__, I2C_2);
> > + return ret;
> > + }
> > +#endif
> >
> > /*
> > * LPC32XX only supports DAT_SE0 USB mode
> > @@ -116,6 +141,8 @@ static void isp1301_configure(void)
> >
> > /* Enable usb_need_clk clock after transceiver is initialized */
> > setbits_le32(&clk_pwr->usb_ctrl, CLK_USBCTRL_USBDVND_EN);
> > +
> > + return 0;
> > }
> >
> > static int usbpll_setup(void)
> > @@ -167,7 +194,9 @@ int usb_cpu_init(void)
> > return ret;
> >
> > /* Configure ISP1301 */
> > - isp1301_configure();
> > + ret = isp1301_configure();
> > + if (ret)
> > + return ret;
>
> Don't we need some sort of failpath now, to undo the changes ?
>
With the rework of the patch, this change is no longer needed.
> > /* setup USB clocks and PLL */
> > ret = usbpll_setup();
> >
>
>
Sylvain
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