On Mon, Sep 19, 2016 at 01:45:38PM +0200, Fabien Lahoudere wrote:
> Each USB controller have different behaviour, so in order to avoid to have
> several "swicth(data->index)" and lock/unlock, we prefer to get the index
> switch and then test for features if they exist for this index.
> This patch also remove useless test of reg and val. Those two values cannot
> be NULL.
Sorry, I can't see the benefits of this change.
Considering certain controller doesn't have oc feature, with current
code it only needs one comparison (flag disable_oc), but with your
changes, it needs two comparisons.
Peter
>
> Signed-off-by: Fabien Lahoudere <fabien.lahoudere@xxxxxxxxxxxxxxx>
> ---
> drivers/usb/chipidea/usbmisc_imx.c | 38 ++++++++++++++++++++++++--------------
> 1 file changed, 24 insertions(+), 14 deletions(-)
>
> diff --git a/drivers/usb/chipidea/usbmisc_imx.c b/drivers/usb/chipidea/usbmisc_imx.c
> index 20d02a5..9549821 100644
> --- a/drivers/usb/chipidea/usbmisc_imx.c
> +++ b/drivers/usb/chipidea/usbmisc_imx.c
> @@ -199,31 +199,41 @@ static int usbmisc_imx53_init(struct imx_usbmisc_data *data)
> val |= MX53_USB_PLL_DIV_24_MHZ;
> writel(val, usbmisc->base + MX53_USB_OTG_PHY_CTRL_1_OFFSET);
>
> - if (data->disable_oc) {
> - spin_lock_irqsave(&usbmisc->lock, flags);
> - switch (data->index) {
> - case 0:
> + spin_lock_irqsave(&usbmisc->lock, flags);
> +
> + switch (data->index) {
> + case 0:
> + if (data->disable_oc) {
> reg = usbmisc->base + MX53_USB_OTG_PHY_CTRL_0_OFFSET;
> val = readl(reg) | MX53_BM_OVER_CUR_DIS_OTG;
> - break;
> - case 1:
> + writel(val, reg);
> + }
> + break;
> + case 1:
> + if (data->disable_oc) {
> reg = usbmisc->base + MX53_USB_OTG_PHY_CTRL_0_OFFSET;
> val = readl(reg) | MX53_BM_OVER_CUR_DIS_H1;
> - break;
> - case 2:
> + writel(val, reg);
> + }
> + break;
> + case 2:
> + if (data->disable_oc) {
> reg = usbmisc->base + MX53_USB_UH2_CTRL_OFFSET;
> val = readl(reg) | MX53_BM_OVER_CUR_DIS_UHx;
> - break;
> - case 3:
> + writel(val, reg);
> + }
> + break;
> + case 3:
> + if (data->disable_oc) {
> reg = usbmisc->base + MX53_USB_UH3_CTRL_OFFSET;
> val = readl(reg) | MX53_BM_OVER_CUR_DIS_UHx;
> - break;
> - }
> - if (reg && val)
> writel(val, reg);
> - spin_unlock_irqrestore(&usbmisc->lock, flags);
> + }
> + break;
> }
>
> + spin_unlock_irqrestore(&usbmisc->lock, flags);
> +
> return 0;
> }
>
> --
> 2.1.4
>
--
Best Regards,
Peter Chen
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