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[PATCH v3 6/9] phy: ti-pipe3: use *syscon* framework API to power on/off the PHY

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  [PATCH v3 6/9] phy: ti-pipe3: use *syscon* framework API to power on/off the PHY Kishon Vijay Abraham I <kishon@ti.com> - 2015-12-15 10:20 +0100
    Re: [PATCH v3 6/9] phy: ti-pipe3: use *syscon* framework API to  power on/off the PHY Rob Herring <robh@kernel.org> - 2015-12-20 04:40 +0100
      Re: [PATCH v3 6/9] phy: ti-pipe3: use *syscon* framework API to power  on/off the PHY Kishon Vijay Abraham I <kishon@ti.com> - 2015-12-21 09:40 +0100

#1291950 — [PATCH v3 6/9] phy: ti-pipe3: use *syscon* framework API to power on/off the PHY

Deprecate using phy-omap-control driver to power on/off the PHY and
use *syscon* framework to do the same.

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
---
 Documentation/devicetree/bindings/phy/ti-phy.txt |   10 ++-
 drivers/phy/phy-ti-pipe3.c                       |   90 ++++++++++++++++++----
 2 files changed, 85 insertions(+), 15 deletions(-)

diff --git a/Documentation/devicetree/bindings/phy/ti-phy.txt b/Documentation/devicetree/bindings/phy/ti-phy.txt
index 9cf9446..e06f980 100644
--- a/Documentation/devicetree/bindings/phy/ti-phy.txt
+++ b/Documentation/devicetree/bindings/phy/ti-phy.txt
@@ -77,8 +77,6 @@ Required properties:
    * "div-clk" - apll clock
 
 Optional properties:
- - ctrl-module : phandle of the control module used by PHY driver to power on
-   the PHY.
  - id: If there are multiple instance of the same type, in order to
    differentiate between each instance "id" can be used (e.g., multi-lane PCIe
    PHY). If "id" is not provided, it is set to default value of '1'.
@@ -86,6 +84,14 @@ Optional properties:
    CTRL_CORE_SMA_SW_0 register and register offset to the CTRL_CORE_SMA_SW_0
    register that contains the SATA_PLL_SOFT_RESET bit. Only valid for sata_phy.
 
+Deprecated properties:
+ - ctrl-module : phandle of the control module used by PHY driver to power on
+   the PHY.
+
+Recommended properies:
+ - syscon-phy-power : phandle/offset pair. Phandle to the system control
+   module and the register offset to power on/off the PHY.
+
 This is usually a subnode of ocp2scp to which it is connected.
 
 usb3phy@4a084400 {
diff --git a/drivers/phy/phy-ti-pipe3.c b/drivers/phy/phy-ti-pipe3.c
index 0ce4194..bc03625 100644
--- a/drivers/phy/phy-ti-pipe3.c
+++ b/drivers/phy/phy-ti-pipe3.c
@@ -56,6 +56,15 @@
 
 #define SATA_PLL_SOFT_RESET	BIT(18)
 
+#define PIPE3_PHY_PWRCTL_CLK_CMD_MASK	0x003FC000
+#define PIPE3_PHY_PWRCTL_CLK_CMD_SHIFT	14
+
+#define PIPE3_PHY_PWRCTL_CLK_FREQ_MASK	0xFFC00000
+#define PIPE3_PHY_PWRCTL_CLK_FREQ_SHIFT	22
+
+#define PIPE3_PHY_TX_RX_POWERON		0x3
+#define PIPE3_PHY_TX_RX_POWEROFF	0x0
+
 /*
  * This is an Empirical value that works, need to confirm the actual
  * value required for the PIPE3PHY_PLL_CONFIGURATION2.PLL_IDLE status
@@ -86,8 +95,10 @@ struct ti_pipe3 {
 	struct clk		*refclk;
 	struct clk		*div_clk;
 	struct pipe3_dpll_map	*dpll_map;
+	struct regmap		*phy_power_syscon; /* ctrl. reg. acces */
 	struct regmap		*dpll_reset_syscon; /* ctrl. reg. acces */
 	unsigned int		dpll_reset_reg; /* reg. index within syscon */
+	unsigned int		power_reg; /* power reg. index within syscon */
 	bool			sata_refclk_enabled;
 };
 
@@ -144,18 +155,53 @@ static void ti_pipe3_disable_clocks(struct ti_pipe3 *phy);
 
 static int ti_pipe3_power_off(struct phy *x)
 {
+	u32 val;
+	int ret;
 	struct ti_pipe3 *phy = phy_get_drvdata(x);
 
-	omap_control_phy_power(phy->control_dev, 0);
+	if (phy->phy_power_syscon) {
+		val = PIPE3_PHY_TX_RX_POWEROFF <<
+			PIPE3_PHY_PWRCTL_CLK_CMD_SHIFT;
+
+		ret = regmap_update_bits(phy->phy_power_syscon, phy->power_reg,
+					 PIPE3_PHY_PWRCTL_CLK_CMD_MASK, val);
+		if (ret < 0)
+			return ret;
+	} else {
+		omap_control_phy_power(phy->control_dev, 0);
+	}
 
 	return 0;
 }
 
 static int ti_pipe3_power_on(struct phy *x)
 {
+	u32 val;
+	u32 mask;
+	int ret;
+	unsigned long rate;
 	struct ti_pipe3 *phy = phy_get_drvdata(x);
 
-	omap_control_phy_power(phy->control_dev, 1);
+	if (phy->phy_power_syscon) {
+		rate = clk_get_rate(phy->sys_clk);
+		if (!rate) {
+			dev_err(phy->dev, "Invalid clock rate\n");
+			return -EINVAL;
+		}
+		rate = rate / 1000000;
+		mask = OMAP_CTRL_PIPE3_PHY_PWRCTL_CLK_CMD_MASK |
+			  OMAP_CTRL_PIPE3_PHY_PWRCTL_CLK_FREQ_MASK;
+		val = PIPE3_PHY_TX_RX_POWERON <<
+			PIPE3_PHY_PWRCTL_CLK_CMD_SHIFT;
+		val |= rate << OMAP_CTRL_PIPE3_PHY_PWRCTL_CLK_FREQ_SHIFT;
+
+		ret = regmap_update_bits(phy->phy_power_syscon, phy->power_reg,
+					 mask, val);
+		if (ret < 0)
+			return ret;
+	} else {
+		omap_control_phy_power(phy->control_dev, 1);
+	}
 
 	return 0;
 }
@@ -334,7 +380,8 @@ static int ti_pipe3_get_clk(struct ti_pipe3 *phy)
 		phy->wkupclk = ERR_PTR(-ENODEV);
 	}
 
-	if (!of_device_is_compatible(node, "ti,phy-pipe3-pcie")) {
+	if (!of_device_is_compatible(node, "ti,phy-pipe3-pcie") ||
+	    phy->phy_power_syscon) {
 		phy->sys_clk = devm_clk_get(dev, "sysclk");
 		if (IS_ERR(phy->sys_clk)) {
 			dev_err(dev, "unable to get sysclk\n");
@@ -383,19 +430,36 @@ static int ti_pipe3_get_sysctrl(struct ti_pipe3 *phy)
 	struct device_node *control_node;
 	struct platform_device *control_pdev;
 
-	control_node = of_parse_phandle(node, "ctrl-module", 0);
-	if (!control_node) {
-		dev_err(dev, "Failed to get control device phandle\n");
-		return -EINVAL;
+	phy->phy_power_syscon = syscon_regmap_lookup_by_phandle(node,
+							"syscon-phy-power");
+	if (IS_ERR(phy->phy_power_syscon)) {
+		dev_dbg(dev,
+			"can't get syscon-phy-power, using control device\n");
+		phy->phy_power_syscon = NULL;
+	} else {
+		if (of_property_read_u32_index(node,
+					       "syscon-phy-power", 1,
+					       &phy->power_reg)) {
+			dev_err(dev, "couldn't get power reg. offset\n");
+			return -EINVAL;
+		}
 	}
 
-	control_pdev = of_find_device_by_node(control_node);
-	if (!control_pdev) {
-		dev_err(dev, "Failed to get control device\n");
-		return -EINVAL;
-	}
+	if (!phy->phy_power_syscon) {
+		control_node = of_parse_phandle(node, "ctrl-module", 0);
+		if (!control_node) {
+			dev_err(dev, "Failed to get control device phandle\n");
+			return -EINVAL;
+		}
 
-	phy->control_dev = &control_pdev->dev;
+		control_pdev = of_find_device_by_node(control_node);
+		if (!control_pdev) {
+			dev_err(dev, "Failed to get control device\n");
+			return -EINVAL;
+		}
+
+		phy->control_dev = &control_pdev->dev;
+	}
 
 	if (of_device_is_compatible(node, "ti,phy-pipe3-sata")) {
 		phy->dpll_reset_syscon = syscon_regmap_lookup_by_phandle(node,
-- 
1.7.9.5

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#1295509 — Re: [PATCH v3 6/9] phy: ti-pipe3: use *syscon* framework API to power on/off the PHY

On Tue, Dec 15, 2015 at 02:46:05PM +0530, Kishon Vijay Abraham I wrote:
> Deprecate using phy-omap-control driver to power on/off the PHY and
> use *syscon* framework to do the same.
> 
> Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
> ---
>  Documentation/devicetree/bindings/phy/ti-phy.txt |   10 ++-
>  drivers/phy/phy-ti-pipe3.c                       |   90 ++++++++++++++++++----
>  2 files changed, 85 insertions(+), 15 deletions(-)

For the binding:

Acked-by: Rob Herring <robh@kernel.org>

One comment on the driver though.

[...]

> --- a/drivers/phy/phy-ti-pipe3.c
> +++ b/drivers/phy/phy-ti-pipe3.c

[...]

> @@ -144,18 +155,53 @@ static void ti_pipe3_disable_clocks(struct ti_pipe3 *phy);
>  
>  static int ti_pipe3_power_off(struct phy *x)
>  {
> +	u32 val;
> +	int ret;
>  	struct ti_pipe3 *phy = phy_get_drvdata(x);
>  
> -	omap_control_phy_power(phy->control_dev, 0);
> +	if (phy->phy_power_syscon) {

Writing this as:

if (!phy->phy_power_syscon) {
	...
	return 0;
}

//regmap code


will make it simpler to remove the deprecated code later.


> +		val = PIPE3_PHY_TX_RX_POWEROFF <<
> +			PIPE3_PHY_PWRCTL_CLK_CMD_SHIFT;
> +
> +		ret = regmap_update_bits(phy->phy_power_syscon, phy->power_reg,
> +					 PIPE3_PHY_PWRCTL_CLK_CMD_MASK, val);
> +		if (ret < 0)
> +			return ret;
> +	} else {
> +		omap_control_phy_power(phy->control_dev, 0);
> +	}
>  
>  	return 0;
--
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#1295825 — Re: [PATCH v3 6/9] phy: ti-pipe3: use *syscon* framework API to power on/off the PHY

Hi

On Sunday 20 December 2015 09:08 AM, Rob Herring wrote:
> On Tue, Dec 15, 2015 at 02:46:05PM +0530, Kishon Vijay Abraham I wrote:
>> Deprecate using phy-omap-control driver to power on/off the PHY and
>> use *syscon* framework to do the same.
>>
>> Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
>> ---
>>  Documentation/devicetree/bindings/phy/ti-phy.txt |   10 ++-
>>  drivers/phy/phy-ti-pipe3.c                       |   90 ++++++++++++++++++----
>>  2 files changed, 85 insertions(+), 15 deletions(-)
> 
> For the binding:
> 
> Acked-by: Rob Herring <robh@kernel.org>
> 
> One comment on the driver though.
> 
> [...]
> 
>> --- a/drivers/phy/phy-ti-pipe3.c
>> +++ b/drivers/phy/phy-ti-pipe3.c
> 
> [...]
> 
>> @@ -144,18 +155,53 @@ static void ti_pipe3_disable_clocks(struct ti_pipe3 *phy);
>>  
>>  static int ti_pipe3_power_off(struct phy *x)
>>  {
>> +	u32 val;
>> +	int ret;
>>  	struct ti_pipe3 *phy = phy_get_drvdata(x);
>>  
>> -	omap_control_phy_power(phy->control_dev, 0);
>> +	if (phy->phy_power_syscon) {
> 
> Writing this as:
> 
> if (!phy->phy_power_syscon) {
> 	...
> 	return 0;
> }
> 
> //regmap code
> 
> 
> will make it simpler to remove the deprecated code later.

hmm.. I will make this change in all the applicable patches.

Thanks
Kishon
> 
> 
>> +		val = PIPE3_PHY_TX_RX_POWEROFF <<
>> +			PIPE3_PHY_PWRCTL_CLK_CMD_SHIFT;
>> +
>> +		ret = regmap_update_bits(phy->phy_power_syscon, phy->power_reg,
>> +					 PIPE3_PHY_PWRCTL_CLK_CMD_MASK, val);
>> +		if (ret < 0)
>> +			return ret;
>> +	} else {
>> +		omap_control_phy_power(phy->control_dev, 0);
>> +	}
>>  
>>  	return 0;
--
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