Patchwork [v2,1/5] PCI: tegra: Overhaul regulator usage

login
register
mail settings
Submitter Thierry Reding
Date May 28, 2014, 2:49 p.m.
Message ID <1401288555-24197-2-git-send-email-thierry.reding@gmail.com>
Download mbox | patch
Permalink /patch/353482/
State Accepted, archived
Headers show

Comments

Thierry Reding - May 28, 2014, 2:49 p.m.
From: Thierry Reding <treding@nvidia.com>

The current usage of regulators for the Tegra PCIe block is wrong. It
doesn't accurately reflect the actual supply inputs of the IP block and
therefore isn't as flexible as it should be. Rectify this by describing
all possible supply inputs in the device tree binding documentation and
deprecate the old supply properties.

Signed-off-by: Thierry Reding <treding@nvidia.com>
---
Changes in v2:
- fix power rail assignment on Tegra30

 .../bindings/pci/nvidia,tegra20-pcie.txt           | 35 ++++++++++++++++++++--
 1 file changed, 32 insertions(+), 3 deletions(-)
Stephen Warren - May 29, 2014, 5:48 p.m.
On 05/28/2014 08:49 AM, Thierry Reding wrote:
> From: Thierry Reding <treding@nvidia.com>
> 
> The current usage of regulators for the Tegra PCIe block is wrong. It
> doesn't accurately reflect the actual supply inputs of the IP block and
> therefore isn't as flexible as it should be. Rectify this by describing
> all possible supply inputs in the device tree binding documentation and
> deprecate the old supply properties.

The series looks fine to me at a quick glance. Since Bjorn has ack'd the
PCIe driver patch, I'll apply this to the Tegra tree for 3.17. I'll put
it into a topic branch in case it needs to be merged into the PCI tree
to resolve any conflicts.
--
To unsubscribe from this list: send the line "unsubscribe linux-tegra" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

Patch

diff --git a/Documentation/devicetree/bindings/pci/nvidia,tegra20-pcie.txt b/Documentation/devicetree/bindings/pci/nvidia,tegra20-pcie.txt
index c300391e8d3e..f56d89998a44 100644
--- a/Documentation/devicetree/bindings/pci/nvidia,tegra20-pcie.txt
+++ b/Documentation/devicetree/bindings/pci/nvidia,tegra20-pcie.txt
@@ -14,9 +14,6 @@  Required properties:
 - interrupt-names: Must include the following entries:
   "intr": The Tegra interrupt that is asserted for controller interrupts
   "msi": The Tegra interrupt that is asserted when an MSI is received
-- pex-clk-supply: Supply voltage for internal reference clock
-- vdd-supply: Power supply for controller (1.05V)
-- avdd-supply: Power supply for controller (1.05V) (not required for Tegra20)
 - bus-range: Range of bus numbers associated with this controller
 - #address-cells: Address representation for root ports (must be 3)
   - cell 0 specifies the bus and device numbers of the root port:
@@ -60,6 +57,38 @@  Required properties:
   - afi
   - pcie_x
 
+Power supplies for Tegra20:
+- avdd-pex-supply: Power supply for analog PCIe logic. Must supply 1.05 V.
+- vdd-pex-supply: Power supply for digital PCIe I/O. Must supply 1.05 V.
+- avdd-pex-pll-supply: Power supply for dedicated (internal) PCIe PLL. Must
+  supply 1.05 V.
+- avdd-plle-supply: Power supply for PLLE, which is shared with SATA. Must
+  supply 1.05 V.
+- vddio-pex-clk-supply: Power supply for PCIe clock. Must supply 3.3 V.
+
+Power supplies for Tegra30:
+- Required:
+  - avdd-pex-pll-supply: Power supply for dedicated (internal) PCIe PLL. Must
+    supply 1.05 V.
+  - avdd-plle-supply: Power supply for PLLE, which is shared with SATA. Must
+    supply 1.05 V.
+  - vddio-pex-ctl-supply: Power supply for PCIe control I/O partition. Must
+    supply 1.8 V.
+  - hvdd-pex-supply: High-voltage supply for PCIe I/O and PCIe output clocks.
+    Must supply 3.3 V.
+- Optional:
+  - If lanes 0 to 3 are used:
+    - avdd-pexa-supply: Power supply for analog PCIe logic. Must supply 1.05 V.
+    - vdd-pexa-supply: Power supply for digital PCIe I/O. Must supply 1.05 V.
+  - If lanes 4 or 5 are used:
+    - avdd-pexb-supply: Power supply for analog PCIe logic. Must supply 1.05 V.
+    - vdd-pexb-supply: Power supply for digital PCIe I/O. Must supply 1.05 V.
+
+Deprecated supplies:
+- pex-clk-supply: Supply voltage for internal reference clock
+- vdd-supply: Power supply for controller (1.05V)
+- avdd-supply: Power supply for controller (1.05V) (not required for Tegra20)
+
 Root ports are defined as subnodes of the PCIe controller node.
 
 Required properties: