When checking dts involving the r9a06g032.dtsi file, the following kind
of warnings are reported:
Missing property '#address-cells' in node xxx, using 0 as fallback
Indeed, #address-cells is not present in the GIC interrupt controller
node.
Fix it adding the missing property.
Value '0' is correct because:
1. GIC interrupt controller does not have children,
2. interrupt-map property in PCI node and in IRQ mux node consists of
several components and the component related to "parent unit
address", which size is defined by '#address-cells' of the node
pointed to by the interrupt-parent component, is not used (=0)
No functional change.
Signed-off-by: Herve Codina (Schneider Electric) <herve.codina@bootlin.com>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://patch.msgid.link/20260325095718.388157-1-herve.codina@bootlin.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
The Renesas RZ/V2N SoC (a.k.a. r9a09g056) comes with 4 CA55
cores and 1 CM33 core.
While the user manual doesn't explicitly specify which cores
should have access to particular watchdogs, it turns out that
(similarly to the Renesas RZ/V2H(P)) it only makes sense for
Linux to use WDT1.
Remove DT nodes wdt{0,2,3} from the RZ/V2N SoC specific dtsi
to make it compliant with the original design intent.
This change is harmless as there are no users for the nodes
being stripped out of this device tree.
Signed-off-by: Fabrizio Castro <fabrizio.castro.jz@renesas.com>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://patch.msgid.link/20260324225239.19136-2-fabrizio.castro.jz@renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
The RZ/G3E SMARC SoM has a fixed 100 MHz reference clock generator
for PCIe. Model it as a fixed-clock and assign it to the PCIe port.
Signed-off-by: John Madieu <john.madieu.xa@bp.renesas.com>
Tested-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
Tested-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com> # RZ/V2N EVK
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://patch.msgid.link/20260318085119.44717-4-john.madieu.xa@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
The KSZ9131 schema does not document the "txdv-skew-psec" property,
neither does the kernel driver support this property. It does however
document and support the "txen-skew-psec" property. Fix what is likely
a copy-paste error from the matching "rxdv-skew-psec" property, use the
"txen-skew-psec" property instead of the "txdv-skew-psec" property.
Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
Tested-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://patch.msgid.link/20260313164008.40933-5-marek.vasut+renesas@mailbox.org
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
The Microchip KSZ9131 PHY schema indicates that the compatible string
"ethernet-phy-id0022.1640" must not be followed by any other compatible
string. Drop trailing "ethernet-phy-ieee802.3-c22" to match the schema.
Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://patch.msgid.link/20260313164008.40933-4-marek.vasut+renesas@mailbox.org
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
The Realtek RTL8211F PHY schema indicates that the compatible string
"ethernet-phy-id001c.c916" must not be followed by any other compatible
string. Drop trailing "ethernet-phy-ieee802.3-c22" to match the schema.
Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://patch.msgid.link/20260313164008.40933-3-marek.vasut+renesas@mailbox.org
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
The Realtek RTL8211E PHY schema indicates that the compatible string
"ethernet-phy-id001c.c915" must not be followed by any other compatible
string. Drop trailing "ethernet-phy-ieee802.3-c22" to match the schema.
Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://patch.msgid.link/20260313164008.40933-2-marek.vasut+renesas@mailbox.org
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Add interrupt support for the GMAC1 and GMAC2 PHYs on the RZ/T2H EVK
board. The PHYs are connected to the ICU via IRQ3 and IRQ13 lines
respectively.
Define RZT2H_IRQxx macros in the SoC DTSI to map the ICU IRQ_NS lines
to their absolute ICU interrupt space offsets.
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://patch.msgid.link/20260312160407.3387840-3-prabhakar.mahadev-lad.rj@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Add interrupt support for the GMAC1 and GMAC2 PHYs on the RZ/N2H EVK
board. The PHYs are connected to the ICU via IRQ14 and IRQ15 lines
respectively.
Define RZN2H_IRQxx macros in the SoC DTSI to map the ICU IRQ_NS lines
to their absolute ICU interrupt space offsets.
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://patch.msgid.link/20260312160407.3387840-2-prabhakar.mahadev-lad.rj@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Add device tree overlay to support the MayQueen PixPaper e-paper display
on the Renesas RZ/V2H EVK (KAKIP board). The display is connected via
SPI0 interface and uses GPIO pins for reset, busy, and DC control.
The overlay configures:
- RSPI0 pinmux for SPI communication (MOSI, MISO, CLK, CE0),
- PixPaper display device with proper GPIO assignments,
- SPI frequency set to 1MHz for stable operation.
This enables support for the Open-EP Community pixpaper-213-c module on
the RZ/V2H platform.
Signed-off-by: Wig Cheng <onlywig@gmail.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://patch.msgid.link/20260124163611.3279104-1-onlywig@gmail.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Document the required JP23 jumper positions for supplying SD0 when
selecting between the onboard eMMC and the SD card slot.
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://patch.msgid.link/20260123225957.1007089-4-prabhakar.mahadev-lad.rj@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Clarify the board setup requirements for using SDHI0 on the RZ/T2H EVK by
documenting the CN78 jumper positions needed to supply SD0 power for
either the default eMMC configuration or the SD card slot configuration.
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://patch.msgid.link/20260123225957.1007089-3-prabhakar.mahadev-lad.rj@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Add the wakeup-source property to the ST1232 touchscreen node in the
device tree so that the touchscreen interrupt can wake the system from
suspend when the panel is touched.
Signed-off-by: bui duc phuc <phucduc.bui@gmail.com>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Tested-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://patch.msgid.link/20260309000319.74880-3-phucduc.bui@gmail.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
The Armadillo-800EVA board provides an SD card slot and an AWL13 SDIO
interface connected to the SDHI1 controller. Routing between these two
interfaces is controlled by a mechanical DIP switch and a set of
multiplexers.
To support this, add:
- A fixed 3.3V regulator for SDHI1 power, controlled by PORT16 (G2),
- SDHI1 pinmux groups for data, control, and card detection,
- A gpio-hog for PORT6 (J5) to control the SDHI1/AWLAN multiplexer.
PORT176 (N21) is already configured as output-high in this DTS (via
lcd0-mux-hog), routing the SDSLOT2_ENABLE signal to PORT6. Since the
hardware includes an external 10k pull-up resistor (R94) on this line,
PORT6 is configured as an input to allow the physical DIP switch to
determine the routing without SoC interference.
Both configurations have been verified:
- SD card (CON8): detected as mmcblk1, high-speed SDHC,
- SDIO (CON14): detected as mmc1, high-speed SDIO.
Signed-off-by: bui duc phuc <phucduc.bui@gmail.com>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Tested-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://patch.msgid.link/20260224074532.60046-1-phucduc.bui@gmail.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Make use of the interrupts wired to the Micrel PHYs via the GPIO IRQ
mux.
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Herve Codina <herve.codina@bootlin.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://patch.msgid.link/20260311200307.16034-2-wsa+renesas@sang-engineering.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Enable the QSPI controller to access the connected SPI NOR flash. The
NOR datasheet may suggest faster tuning parameters but those did not
work on my board.
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://patch.msgid.link/20260305220023.28257-2-wsa+renesas@sang-engineering.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Add a node describing the QSPI controller.
There are 2 clocks feeding this controller:
- one for the reference clock
- one that feeds both the ahb and the apb interfaces
As the binding expect either the ref clock, or all three (ref, ahb and
apb) clocks, it makes sense to provide the same clock twice.
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Miquel Raynal (Schneider Electric) <miquel.raynal@bootlin.com>
Link: https://patch.msgid.link/20260205-schneider-6-19-rc1-qspi-v5-4-843632b3c674@bootlin.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
RZ/N2H (R9A09G087) has three DMA controllers that can be used by
peripherals like SPI to offload data transfers from the CPU.
Wire up the DMA channels for the SPI peripherals.
Signed-off-by: Cosmin Tanislav <cosmin-gabriel.tanislav.xa@renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://patch.msgid.link/20260128215132.1353381-4-cosmin-gabriel.tanislav.xa@renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
RZ/T2H (R9A09G077) has three DMA controllers that can be used by
peripherals like SPI to offload data transfers from the CPU.
Wire up the DMA channels for the SPI peripherals.
Signed-off-by: Cosmin Tanislav <cosmin-gabriel.tanislav.xa@renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://patch.msgid.link/20260128215132.1353381-3-cosmin-gabriel.tanislav.xa@renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Describe the 9FGV0841 PCIe and USB3.0 clock generator present on Ebisu
board. The clock generator supplies 100 MHz differential clock for both
PCIe slot and BT/WLAN expansion port, as well as for the USB 3.0 PHY.
This configuration is valid for SW49 in OFF position, which means the
PCIe signals are routed to the PCIe slot and U11 9FGV0841 PCIe clock
generator output 3 supplies clock to the PCIe slot.
In case the SW49 is set to ON position, which means the PCIe signals
are routed to the EX BT/WLAN expansion port, and U11 9FGV0841 PCIe
clock generator output 4 supplies clock to the port and &pciec0_rp
clocks should be changed to "clocks = <&pcie_usb_clk 4>;". Once the
BT/WLAN port is tested, this can be implemented using a DTO. Until
then, assume SW49 is set to OFF position.
Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://patch.msgid.link/20260118135038.8033-10-marek.vasut+renesas@mailbox.org
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Describe the 9FGV0841 PCIe and USB3.0 clock generator present on ULCB
boards. The clock generator supplies 100 MHz differential clock for
both PCIe ports, the USB 3.0 PHY and SATA.
SATA is not yet described in the ULCB DT, therefore the connection to
this clock generator is not described here either.
The H3 ULCB schematic does describe connection from output DIF7 to
USB3S1_CLK_*, but these signals do not exist on the SoC, therefore
this connection is also not described.
Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://patch.msgid.link/20260118135038.8033-9-marek.vasut+renesas@mailbox.org
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Describe the 9FGV0841 PCIe and USB3.0 clock generator present on both
Salvator-X and Salvator-XS boards. The clock generator supplies 100 MHz
differential clock for both PCIe ports, as well as for the USB 3.0 PHY.
Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://patch.msgid.link/20260118135038.8033-8-marek.vasut+renesas@mailbox.org
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Add USB 3.0 PHY and PHY clock node for R-Car E3. The PHY node is
different in that it does not have control registers and extal clock,
which are not routed to the SoC pads on R-Car E3, therefore describe the
PHY as usb-nop-xceiv simple PHY. Add USB3S0 clock pad fixed-clock node,
the frequency has to be overridden at board level.
Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://patch.msgid.link/20260118135038.8033-7-marek.vasut+renesas@mailbox.org
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Add node which describes the root port in the PCIe controller DT node.
This can be used together with the pwrctrl driver to control clock and
power supply to a PCIe slot.
Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://patch.msgid.link/20260118135038.8033-6-marek.vasut+renesas@mailbox.org
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Add nodes which describe the root ports in the PCIe controller DT nodes.
This can be used together with the pwrctrl driver to control clock and
power supply to a PCIe slot.
Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://patch.msgid.link/20260118135038.8033-5-marek.vasut+renesas@mailbox.org
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Add nodes which describe the root ports in the PCIe controller DT nodes.
This can be used together with the pwrctrl driver to control clock and
power supply to a PCIe slot.
Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://patch.msgid.link/20260118135038.8033-4-marek.vasut+renesas@mailbox.org
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Add nodes which describe the root ports in the PCIe controller DT nodes.
This can be used together with the pwrctrl driver to control clock and
power supply to a PCIe slot.
Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://patch.msgid.link/20260118135038.8033-3-marek.vasut+renesas@mailbox.org
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Add nodes which describe the root ports in the PCIe controller DT nodes.
This can be used together with the pwrctrl driver to control clock and
power supply to a PCIe slot.
Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://patch.msgid.link/20260118135038.8033-2-marek.vasut+renesas@mailbox.org
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
In RZ/N1 SoCs, CPUs are allowed to work at 125, 250 or 500 MHz when the
'ref' clock frequency value is set to 500 MHz which is the default 'ref'
clock frequency value.
Add support for CPU frequency scaling defining those 3 frequencies in
the opp-table with the assumption that the 'ref' clock is set to its
default value.
Signed-off-by: Herve Codina (Schneider Electric) <herve.codina@bootlin.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://patch.msgid.link/20260115164905.1203453-1-herve.codina@bootlin.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
The U-Boot SPL is responsible for initializing the hardware and it does
also initialize HSCIF0 and its pinmux, mark the HSCIF0 pinmux as needed
in all bootloader stages. The SPL also uses OTP to determine the exact
V4H SoC variant during DRAM initialization, to determine which is the
maximum allowed DRAM rate, mark OTP as required in all bootloader stages
as well.
Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://patch.msgid.link/20260112234642.225993-1-marek.vasut+renesas@mailbox.org
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
The default settings for the Versa3 device on the Renesas RZ/G3S SMARC
SoM board have PLL2 disabled. PLL2 was later enabled together with audio
support, as it is required to support both 44.1 kHz and 48 kHz audio.
With PLL2 enabled, it was observed that Linux occasionally either hangs
during boot (the last log message being related to the I2C probe) or
randomly crashes. This was mainly reproducible on cold boots. During
debugging, it was also noticed that the Unicode replacement character (�)
sometimes appears on the serial console. Further investigation traced this
to the configuration applied through the Versa3 register at offset 0x1c,
which controls PLL enablement.
The appearance of the Unicode replacement character suggested an issue
with the SoC reference clock. The RZ/G3S reference clock is provided by
the Versa3 clock generator (REF output).
After checking with the Renesas Versa3 hardware team, it was found that
this is related to the PLL2 lock bit being set through the
renesas,settings DT property.
The PLL lock bit must be set to avoid unstable clock output from the PLL.
However, due to the Versa3 hardware design, when a PLL lock bit is set,
all outputs (including the REF clock) are temporarily disabled until the
configured PLLs become stable.
As an alternative, the bypass bit can be used. This does not interrupt the
PLL2 output or any other Versa3 outputs, but it may result in temporary
instability on PLL2 output while the configuration is applied. Since PLL2
feeds only the audio path and audio is not used during early boot, this is
acceptable and does not affect system boot.
Drop the PLL2 lock bit and set the bypass bit instead.
This has been tested with more than 1000 cold boots.
Fixes: a94253232b ("arm64: dts: renesas: rzg3s-smarc-som: Add versa3 clock generator node")
Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://patch.msgid.link/20260302135703.162601-1-claudiu.beznea.uj@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
The CPG register regions were incorrectly sized. Update them to match
the actual hardware specification:
- First region (0x80280000): 0x1000 -> 0x10000 (64kiB)
- Second region (0x81280000): 0x9000 -> 0x10000 (64kiB)
Fixes: 4b3d31f0b8 ("arm64: dts: renesas: Add initial SoC DTSI for the RZ/N2H SoC")
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://patch.msgid.link/20260213131742.3606334-3-prabhakar.mahadev-lad.rj@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
The CPG register regions were incorrectly sized. Update them to match
the actual hardware specification:
- First region (0x80280000): 0x1000 -> 0x10000 (64kiB)
- Second region (0x81280000): 0x9000 -> 0x10000 (64kiB)
Fixes: d17b34744f ("arm64: dts: renesas: Add initial support for the Renesas RZ/T2H SoC")
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://patch.msgid.link/20260213131742.3606334-2-prabhakar.mahadev-lad.rj@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
The HW user manual for the Renesas RZ/V2H(P) SoC (a.k.a r9a09g057)
states that only WDT1 is supposed to be accessed by the CA55 cores.
WDT0 is supposed to be used by the CM33 core, WDT2 is supposed
to be used by the CR8 core 0, and WDT3 is supposed to be used
by the CR8 core 1.
Remove wdt{0,2,3} from the SoC specific device tree to make it
compliant with the specification from the HW manual.
This change is harmless as there are currently no users of the
wdt{0,2,3} device tree nodes, only the wdt1 node is actually used.
Fixes: 095105496e ("arm64: dts: renesas: r9a09g057: Add WDT0-WDT3 nodes")
Signed-off-by: Fabrizio Castro <fabrizio.castro.jz@renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://patch.msgid.link/20260203124247.7320-3-fabrizio.castro.jz@renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Set an appropriate ramp delay for the SD0 I/O voltage regulator in the
CN15 SD overlay to make UHS-I voltage switching reliable during card
initialization.
This issue was observed on the RZ/V2H EVK, while the same UHS-I cards
worked on the RZ/V2N EVK without problems. Adding the ramp delay makes
the behavior consistent and avoids SD init timeouts.
Before this change SD0 could fail with:
mmc0: error -110 whilst initialising SD card
With the delay in place UHS-I cards enumerate correctly:
mmc0: new UHS-I speed SDR104 SDXC card at address aaaa
mmcblk0: mmc0:aaaa SR64G 59.5 GiB
mmcblk0: p1
Fixes: 3d6c2bc762 ("arm64: dts: renesas: Add CN15 eMMC and SD overlays for RZ/V2H and RZ/V2N EVKs")
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://patch.msgid.link/20260123225957.1007089-5-prabhakar.mahadev-lad.rj@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Add a ramp delay of 60 uV/us to the vqmmc_sdhi0 voltage regulator to
fix UHS-I SD card detection failures.
Measurements on CN78 pin 4 showed the actual voltage ramp time to be
21.86ms when switching between 3.3V and 1.8V. A 25ms ramp delay has
been configured to provide adequate margin. The calculation is based
on the voltage delta of 1.5V (3.3V - 1.8V):
1500000 uV / 60 uV/us = 25000 us (25ms)
Prior to this patch, UHS-I cards failed to initialize with:
mmc0: error -110 whilst initialising SD card
After this patch, UHS-I cards are properly detected on SD0:
mmc0: new UHS-I speed SDR104 SDXC card at address aaaa
mmcblk0: mmc0:aaaa SR64G 59.5 GiB
Fixes: d065453e5e ("arm64: dts: renesas: rzt2h-rzn2h-evk: Enable SD card slot")
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://patch.msgid.link/20260123225957.1007089-2-prabhakar.mahadev-lad.rj@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
