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Date: Fri, 30 Jan 2015 12:48:16 +0100
From: Maxime Coquelin <maxime.coquelin@...com>
To: Kishon Vijay Abraham I <kishon@...com>,
Peter Griffin <peter.griffin@...aro.org>,
<linux-arm-kernel@...ts.infradead.org>,
<linux-kernel@...r.kernel.org>, <srinivas.kandagatla@...il.com>,
<patrice.chotard@...com>, <peppe.cavallaro@...com>, <arnd@...db.de>
Cc: <lee.jones@...aro.org>, <devicetree@...r.kernel.org>,
<netdev@...r.kernel.org>
Subject: Re: [PATCH v2 2/7] phy: miphy365x: Pass sysconfig register offsets
via syscfg dt property.
On 01/30/2015 12:08 PM, Kishon Vijay Abraham I wrote:
> Hi,
>
> On Friday 30 January 2015 04:18 PM, Maxime Coquelin wrote:
>> Hi Kishon,
>>
>> On 01/30/2015 11:35 AM, Kishon Vijay Abraham I wrote:
>>> Hi,
>>>
>>> On Wednesday 07 January 2015 08:34 PM, Peter Griffin wrote:
>>>> Based on Arnds review comments here https://lkml.org/lkml/2014/11/13/161,
>>>> update the miphy365 phy driver to access sysconfig register offsets via
>>>> syscfg dt property.
>>>>
>>>> This is because the reg property should not be mixing address spaces
>>>> like it does currently for miphy365. This change then also aligns us
>>>> to how other platforms such as keystone and bcm7445 pass there syscon
>>>> offsets via DT.
>>>>
>>>> This patch breaks DT compatibility, but this platform is considered WIP,
>>>> and is only used by a few developers who are upstreaming support for it.
>>>> This change has been done as a single atomic commit to ensure it is
>>>> bisectable.
>>> I'm dropping this from my tree since I didn't get Ack from
>>> "arch/arm/boot/dts/stih416.dtsi" Maintainer.
>> Sorry, on cover letter, I replied the series looked good to me.
>> So you can add:
>>
>> Acked-by: Maxime Coquelin <maxime.coquelin@...com>
>>
>> And even:
>>
>> Tested-by: Maxime Coquelin <maxime.coquelin@...com>
> Thanks. I'll merge them now.
> I'd assume there won't be any conflicts when it gets merged to linus tree.
Thanks Kishon,
I have merged this patch with the last DT pull-request I sent for v3.20,
and didn't had any conflicts.
So I'm confident there won't be any issue.
Br,
Maxime
>
> Cheers
> Kishon
>
>> Kind regards,
>> Maxime
>>
>>> Thanks
>>> Kishon
>>>> Signed-off-by: Peter Griffin <peter.griffin@...aro.org>
>>>> Reviewed-by: Arnd Bergmann <arnd@...db.de>
>>>> ---
>>>> .../devicetree/bindings/phy/phy-miphy365x.txt | 15 +++++------
>>>> arch/arm/boot/dts/stih416.dtsi | 10 ++++----
>>>> drivers/phy/phy-miphy365x.c | 29
>>>> ++++++++--------------
>>>> 3 files changed, 23 insertions(+), 31 deletions(-)
>>>>
>>>> diff --git a/Documentation/devicetree/bindings/phy/phy-miphy365x.txt
>>>> b/Documentation/devicetree/bindings/phy/phy-miphy365x.txt
>>>> index 42c8808..9802d5d 100644
>>>> --- a/Documentation/devicetree/bindings/phy/phy-miphy365x.txt
>>>> +++ b/Documentation/devicetree/bindings/phy/phy-miphy365x.txt
>>>> @@ -6,8 +6,10 @@ for SATA and PCIe.
>>>> Required properties (controller (parent) node):
>>>> - compatible : Should be "st,miphy365x-phy"
>>>> -- st,syscfg : Should be a phandle of the system configuration register
>>>> group
>>>> - which contain the SATA, PCIe mode setting bits
>>>> +- st,syscfg : Phandle / integer array property. Phandle of sysconfig group
>>>> + containing the miphy registers and integer array should contain
>>>> + an entry for each port sub-node, specifying the control
>>>> + register offset inside the sysconfig group.
>>>> Required nodes : A sub-node is required for each channel the controller
>>>> provides. Address range information including the usual
>>>> @@ -26,7 +28,6 @@ Required properties (port (child) node):
>>>> registers filled in "reg":
>>>> - sata: For SATA devices
>>>> - pcie: For PCIe devices
>>>> - - syscfg: To specify the syscfg based config register
>>>> Optional properties (port (child) node):
>>>> - st,sata-gen : Generation of locally attached SATA IP.
>>>> Expected values
>>>> @@ -39,20 +40,20 @@ Example:
>>>> miphy365x_phy: miphy365x@...82000 {
>>>> compatible = "st,miphy365x-phy";
>>>> - st,syscfg = <&syscfg_rear>;
>>>> + st,syscfg = <&syscfg_rear 0x824 0x828>;
>>>> #address-cells = <1>;
>>>> #size-cells = <1>;
>>>> ranges;
>>>> phy_port0: port@...82000 {
>>>> - reg = <0xfe382000 0x100>, <0xfe394000 0x100>, <0x824 0x4>;
>>>> - reg-names = "sata", "pcie", "syscfg";
>>>> + reg = <0xfe382000 0x100>, <0xfe394000 0x100>;
>>>> + reg-names = "sata", "pcie";
>>>> #phy-cells = <1>;
>>>> st,sata-gen = <3>;
>>>> };
>>>> phy_port1: port@...8a000 {
>>>> - reg = <0xfe38a000 0x100>, <0xfe804000 0x100>, <0x828 0x4>;;
>>>> + reg = <0xfe38a000 0x100>, <0xfe804000 0x100>;;
>>>> reg-names = "sata", "pcie", "syscfg";
>>>> #phy-cells = <1>;
>>>> st,pcie-tx-pol-inv;
>>>> diff --git a/arch/arm/boot/dts/stih416.dtsi b/arch/arm/boot/dts/stih416.dtsi
>>>> index fad9073..85afe01 100644
>>>> --- a/arch/arm/boot/dts/stih416.dtsi
>>>> +++ b/arch/arm/boot/dts/stih416.dtsi
>>>> @@ -283,21 +283,21 @@
>>>> miphy365x_phy: phy@...82000 {
>>>> compatible = "st,miphy365x-phy";
>>>> - st,syscfg = <&syscfg_rear>;
>>>> + st,syscfg = <&syscfg_rear 0x824 0x828>;
>>>> #address-cells = <1>;
>>>> #size-cells = <1>;
>>>> ranges;
>>>> phy_port0: port@...82000 {
>>>> #phy-cells = <1>;
>>>> - reg = <0xfe382000 0x100>, <0xfe394000 0x100>, <0x824 0x4>;
>>>> - reg-names = "sata", "pcie", "syscfg";
>>>> + reg = <0xfe382000 0x100>, <0xfe394000 0x100>;
>>>> + reg-names = "sata", "pcie";
>>>> };
>>>> phy_port1: port@...8a000 {
>>>> #phy-cells = <1>;
>>>> - reg = <0xfe38a000 0x100>, <0xfe804000 0x100>, <0x828 0x4>;
>>>> - reg-names = "sata", "pcie", "syscfg";
>>>> + reg = <0xfe38a000 0x100>, <0xfe804000 0x100>;
>>>> + reg-names = "sata", "pcie";
>>>> };
>>>> };
>>>> diff --git a/drivers/phy/phy-miphy365x.c b/drivers/phy/phy-miphy365x.c
>>>> index 6ab43a8..6c80154 100644
>>>> --- a/drivers/phy/phy-miphy365x.c
>>>> +++ b/drivers/phy/phy-miphy365x.c
>>>> @@ -141,7 +141,7 @@ struct miphy365x_phy {
>>>> bool pcie_tx_pol_inv;
>>>> bool sata_tx_pol_inv;
>>>> u32 sata_gen;
>>>> - u64 ctrlreg;
>>>> + u32 ctrlreg;
>>>> u8 type;
>>>> };
>>>> @@ -179,7 +179,7 @@ static int miphy365x_set_path(struct miphy365x_phy
>>>> *miphy_phy,
>>>> bool sata = (miphy_phy->type == MIPHY_TYPE_SATA);
>>>> return regmap_update_bits(miphy_dev->regmap,
>>>> - (unsigned int)miphy_phy->ctrlreg,
>>>> + miphy_phy->ctrlreg,
>>>> SYSCFG_SELECT_SATA_MASK,
>>>> sata << SYSCFG_SELECT_SATA_POS);
>>>> }
>>>> @@ -445,7 +445,6 @@ int miphy365x_get_addr(struct device *dev, struct
>>>> miphy365x_phy *miphy_phy,
>>>> {
>>>> struct device_node *phynode = miphy_phy->phy->dev.of_node;
>>>> const char *name;
>>>> - const __be32 *taddr;
>>>> int type = miphy_phy->type;
>>>> int ret;
>>>> @@ -455,22 +454,6 @@ int miphy365x_get_addr(struct device *dev, struct
>>>> miphy365x_phy *miphy_phy,
>>>> return ret;
>>>> }
>>>> - if (!strncmp(name, "syscfg", 6)) {
>>>> - taddr = of_get_address(phynode, index, NULL, NULL);
>>>> - if (!taddr) {
>>>> - dev_err(dev, "failed to fetch syscfg address\n");
>>>> - return -EINVAL;
>>>> - }
>>>> -
>>>> - miphy_phy->ctrlreg = of_translate_address(phynode, taddr);
>>>> - if (miphy_phy->ctrlreg == OF_BAD_ADDR) {
>>>> - dev_err(dev, "failed to translate syscfg address\n");
>>>> - return -EINVAL;
>>>> - }
>>>> -
>>>> - return 0;
>>>> - }
>>>> -
>>>> if (!((!strncmp(name, "sata", 4) && type == MIPHY_TYPE_SATA) ||
>>>> (!strncmp(name, "pcie", 4) && type == MIPHY_TYPE_PCIE)))
>>>> return 0;
>>>> @@ -606,7 +589,15 @@ static int miphy365x_probe(struct platform_device *pdev)
>>>> return ret;
>>>> phy_set_drvdata(phy, miphy_dev->phys[port]);
>>>> +
>>>> port++;
>>>> + /* sysconfig offsets are indexed from 1 */
>>>> + ret = of_property_read_u32_index(np, "st,syscfg", port,
>>>> + &miphy_phy->ctrlreg);
>>>> + if (ret) {
>>>> + dev_err(&pdev->dev, "No sysconfig offset found\n");
>>>> + return ret;
>>>> + }
>>>> }
>>>> provider = devm_of_phy_provider_register(&pdev->dev, miphy365x_xlate);
>>>>
--
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