| Message ID | 20240417114132.6605-1-paul.barker.ct@bp.renesas.com |
|---|---|
| State | New |
| Headers | show |
| Series | pinctrl: renesas: rzg2l: Limit 2.5V power supply to Ethernet interfaces | expand |
On Wed, Apr 17, 2024 at 1:41 PM Paul Barker <paul.barker.ct@bp.renesas.com> wrote: > The RZ/G3S SoC supports configurable supply voltages for several of its > I/O interfaces. All of these interfaces support both 1.8V and 3.3V > supplies, but only the Ethernet and XSPI interfaces support a 2.5V > supply. > > Voltage selection for the XSPI interface is not yet supported, so this > leaves only the Ethernet interfaces currently supporting selection of a > 2.5V supply. So we need to return an error if there is an attempt to > select a 2.5V supply for any non-Ethernet interface. > > Fixes: 51996952b8b5 ("pinctrl: renesas: rzg2l: Add support to select power source for Ethernet pins") > Signed-off-by: Paul Barker <paul.barker.ct@bp.renesas.com> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> i.e. will queue in renesas-clk for v6.10. Gr{oetje,eeting}s, Geert
diff --git a/drivers/pinctrl/renesas/pinctrl-rzg2l.c b/drivers/pinctrl/renesas/pinctrl-rzg2l.c index eb5a8c654260..33602f0e4dad 100644 --- a/drivers/pinctrl/renesas/pinctrl-rzg2l.c +++ b/drivers/pinctrl/renesas/pinctrl-rzg2l.c @@ -892,6 +892,8 @@ static int rzg2l_set_power_source(struct rzg2l_pinctrl *pctrl, u32 pin, u32 caps val = PVDD_1800; break; case 2500: + if (!(caps & (PIN_CFG_IO_VMC_ETH0 | PIN_CFG_IO_VMC_ETH1))) + return -EINVAL; val = PVDD_2500; break; case 3300:
The RZ/G3S SoC supports configurable supply voltages for several of its I/O interfaces. All of these interfaces support both 1.8V and 3.3V supplies, but only the Ethernet and XSPI interfaces support a 2.5V supply. Voltage selection for the XSPI interface is not yet supported, so this leaves only the Ethernet interfaces currently supporting selection of a 2.5V supply. So we need to return an error if there is an attempt to select a 2.5V supply for any non-Ethernet interface. Fixes: 51996952b8b5 ("pinctrl: renesas: rzg2l: Add support to select power source for Ethernet pins") Signed-off-by: Paul Barker <paul.barker.ct@bp.renesas.com> --- drivers/pinctrl/renesas/pinctrl-rzg2l.c | 2 ++ 1 file changed, 2 insertions(+)