[PATCH 4/7] phy: ti-pipe3: use *syscon* framework API to set PCS value of the PHY

[Kishon Vijay Abraham I]

Deprecate using phy-omap-control driver to set PCS value of the PHY
and start using *syscon* API to do the same.

Signed-off-by: Kishon Vijay Abraham I <kis...@ti.com>
Acked-by: Roger Quadros <rog...@ti.com>
---
 Documentation/devicetree/bindings/phy/ti-phy.txt |    2 ++
 drivers/phy/phy-ti-pipe3.c                       |   34 +++++++++++++++++++++-
 2 files changed, 35 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/phy/ti-phy.txt 
b/Documentation/devicetree/bindings/phy/ti-phy.txt
index e06f980..49e5b0c 100644
--- a/Documentation/devicetree/bindings/phy/ti-phy.txt
+++ b/Documentation/devicetree/bindings/phy/ti-phy.txt
@@ -83,6 +83,8 @@ Optional properties:
  - syscon-pllreset: Handle to system control region that contains the
    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.
+ - syscon-pcs : phandle/offset pair. Phandle to the system control module and 
the
+   register offset to write the PCS delay value.
 
 Deprecated properties:
  - ctrl-module : phandle of the control module used by PHY driver to power on
diff --git a/drivers/phy/phy-ti-pipe3.c b/drivers/phy/phy-ti-pipe3.c
index a7c20e8..8dc606d 100644
--- a/drivers/phy/phy-ti-pipe3.c
+++ b/drivers/phy/phy-ti-pipe3.c
@@ -65,6 +65,9 @@
 #define PIPE3_PHY_TX_RX_POWERON                0x3
 #define PIPE3_PHY_TX_RX_POWEROFF       0x0
 
+#define PCIE_PCS_MASK                  0xFF0000
+#define PCIE_PCS_DELAY_COUNT_SHIFT     0x10
+
 /*
  * This is an Empirical value that works, need to confirm the actual
  * value required for the PIPE3PHY_PLL_CONFIGURATION2.PLL_IDLE status
@@ -96,9 +99,11 @@ struct ti_pipe3 {
        struct clk              *div_clk;
        struct pipe3_dpll_map   *dpll_map;
        struct regmap           *phy_power_syscon; /* ctrl. reg. acces */
+       struct regmap           *pcs_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 */
+       unsigned int            pcie_pcs_reg; /* pcs reg. index in syscon */
        bool                    sata_refclk_enabled;
 };
 
@@ -275,7 +280,16 @@ static int ti_pipe3_init(struct phy *x)
         * 18-1804.
         */
        if (of_device_is_compatible(phy->dev->of_node, "ti,phy-pipe3-pcie")) {
-               omap_control_pcie_pcs(phy->control_dev, 0x96);
+               if (phy->pcs_syscon) {
+                       val = 0x96 << OMAP_CTRL_PCIE_PCS_DELAY_COUNT_SHIFT;
+                       ret = regmap_update_bits(phy->pcs_syscon,
+                                                phy->pcie_pcs_reg,
+                                                PCIE_PCS_MASK, val);
+                       if (ret < 0)
+                               return ret;
+               } else {
+                       omap_control_pcie_pcs(phy->control_dev, 0x96);
+               }
                return 0;
        }
 
@@ -491,6 +505,24 @@ static int ti_pipe3_get_sysctrl(struct ti_pipe3 *phy)
                phy->control_dev = &control_pdev->dev;
        }
 
+       if (of_device_is_compatible(node, "ti,phy-pipe3-pcie")) {
+               phy->pcs_syscon = syscon_regmap_lookup_by_phandle(node,
+                                                                 "syscon-pcs");
+               if (IS_ERR(phy->pcs_syscon)) {
+                       dev_dbg(dev,
+                               "can't get syscon-pcs, using omap control\n");
+                       phy->pcs_syscon = NULL;
+               } else {
+                       if (of_property_read_u32_index(node,
+                                                      "syscon-pcs", 1,
+                                                      &phy->pcie_pcs_reg)) {
+                               dev_err(dev,
+                                       "couldn't get pcie pcs reg. offset\n");
+                               return -EINVAL;
+                       }
+               }
+       }
+
        if (of_device_is_compatible(node, "ti,phy-pipe3-sata")) {
                phy->dpll_reset_syscon = syscon_regmap_lookup_by_phandle(node,
                                                        "syscon-pllreset");
-- 
1.7.9.5

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