Re: [PATCH v2 7/7] net: phy: realtek: configure RTL8211E LEDs

Matthias Kaehlcke
2019-07-03T20:46:03Z

On Wed, Jul 03, 2019 at 10:28:17PM +0200, Heiner Kallweit wrote:
> On 03.07.2019 21:37, Matthias Kaehlcke wrote:
> > Configure the RTL8211E LEDs behavior when the device tree property
> > 'realtek,led-modes' is specified.
> >
> > Signed-off-by: Matthias Kaehlcke <mka@chromium.org>
> > ---
> > Changes in v2:
> > - patch added to the series
> > ---
> > drivers/net/phy/realtek.c | 63 +++++++++++++++++++++++++++++++++++++--
> > 1 file changed, 61 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/net/phy/realtek.c b/drivers/net/phy/realtek.c
> > index 45fee4612031..559aec547738 100644
> > --- a/drivers/net/phy/realtek.c
> > +++ b/drivers/net/phy/realtek.c
> > @@ -9,6 +9,7 @@
> > * Copyright (c) 2004 Freescale Semiconductor, Inc.
> > */
> > #include <linux/bitops.h>
> > +#include <linux/bits.h>
> > #include <linux/device.h>
> > #include <linux/module.h>
> > #include <linux/of.h>
> > @@ -35,6 +36,15 @@
> > #define RTL8211E_EEE_LED_MODE1 0x05
> > #define RTL8211E_EEE_LED_MODE2 0x06
> >
> > +/* RTL8211E extension page 44 */
> > +#define RTL8211E_LACR 0x1a
> > +#define RLT8211E_LACR_LEDACTCTRL_SHIFT 4
> > +#define RLT8211E_LACR_LEDACTCTRL_MASK GENMASK(6, 4)
> > +#define RTL8211E_LCR 0x1c
> > +#define RTL8211E_LCR_LEDCTRL_MASK (GENMASK(2, 0) | \
> > + GENMASK(6, 4) | \
> > + GENMASK(10, 8))
> > +
> > /* RTL8211E extension page 160 */
> > #define RTL8211E_SCR 0x1a
> > #define RTL8211E_SCR_DISABLE_RXC_SSC BIT(2)
> > @@ -124,6 +134,56 @@ static int rtl8211e_disable_eee_led_mode(struct phy_device *phydev)
> > return phy_restore_page(phydev, oldpage, ret);
> > }
> >
> > +static int rtl8211e_config_leds(struct phy_device *phydev)
> > +{
> > + struct device *dev = &phydev->mdio.dev;
> > + int count, i, oldpage, ret;
> > + u16 lacr_bits = 0, lcr_bits = 0;
> > +
> > + if (!dev->of_node)
> > + return 0;
> > +
> > + if (of_property_read_bool(dev->of_node, "realtek,eee-led-mode-disable"))
> > + rtl8211e_disable_eee_led_mode(phydev);
> > +
> > + count = of_property_count_elems_of_size(dev->of_node,
> > + "realtek,led-modes",
> > + sizeof(u32));
> > + if (count < 0 || count > 3)
> > + return -EINVAL;
> > +
> > + for (i = 0; i < count; i++) {
> > + u32 val;
> > +
> > + of_property_read_u32_index(dev->of_node,
> > + "realtek,led-modes", i, &val);
> > + lacr_bits |= (u16)(val >> 16) <<
> > + (RLT8211E_LACR_LEDACTCTRL_SHIFT + i);
>
> This may be done in an easier to read way:
>
> if (val & RTL8211E_LINK_ACTIVITY)
> lacr_bits |= BIT(RLT8211E_LACR_LEDACTCTRL_SHIFT + i);

indeed, that's more readable, thanks for the suggestion!

> > + lcr_bits |= (u16)(val & 0xf) << (i * 4);
> > + }
> > +
> > + oldpage = rtl8211e_select_ext_page(phydev, 44);
> > + if (oldpage < 0) {
> > + dev_err(dev, "failed to select extended page: %d\n", oldpage);
>
> In a PHY driver it may be more appropriate to use phydev_err() et al,
> even though effectively it's the same.

sounds good, I'll change it to the phydev_err() et al.

Thanks for the reviews!

Matthias