phy: miphy28lp: Pass sysconfig register offsets via syscfg dt property.

Based on Arnds review comments here https://lkml.org/lkml/2014/11/13/161,
update the miphy28lp 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 miphy28lp. This change then also aligns us to how other
platforms such as keystone and bcm7445 pass there syscon offsets via DT.

I have updated the miphy28lp phy driver same way as Peter's implementation.

Signed-off-by: Gabriel Fernandez <gabriel.fernandez@linaro.org>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>

1 files changed, 32 insertions, 29 deletions

diff --git a/drivers/phy/phy-miphy28lp.c b/drivers/phy/phy-miphy28lp.c
index 27fa62c..9b2848e 100644
--- a/drivers/phy/phy-miphy28lp.c
+++ b/drivers/phy/phy-miphy28lp.c
@@ -194,6 +194,14 @@
 #define MIPHY_SATA_BANK_NB	3
 #define MIPHY_PCIE_BANK_NB	2
 
+enum {
+	SYSCFG_CTRL,
+	SYSCFG_STATUS,
+	SYSCFG_PCI,
+	SYSCFG_SATA,
+	SYSCFG_REG_MAX,
+};
+
 struct miphy28lp_phy {
 	struct phy *phy;
 	struct miphy28lp_dev *phydev;
@@ -211,10 +219,7 @@ struct miphy28lp_phy {
 	u32 sata_gen;
 
 	/* Sysconfig registers offsets needed to configure the device */
-	u32 syscfg_miphy_ctrl;
-	u32 syscfg_miphy_status;
-	u32 syscfg_pci;
-	u32 syscfg_sata;
+	u32 syscfg_reg[SYSCFG_REG_MAX];
 	u8 type;
 };
 
@@ -834,12 +839,12 @@ static int miphy_osc_is_ready(struct miphy28lp_phy *miphy_phy)
 	if (!miphy_phy->osc_rdy)
 		return 0;
 
-	if (!miphy_phy->syscfg_miphy_status)
+	if (!miphy_phy->syscfg_reg[SYSCFG_STATUS])
 		return -EINVAL;
 
 	do {
-		regmap_read(miphy_dev->regmap, miphy_phy->syscfg_miphy_status,
-			    &val);
+		regmap_read(miphy_dev->regmap,
+				miphy_phy->syscfg_reg[SYSCFG_STATUS], &val);
 
 		if ((val & MIPHY_OSC_RDY) != MIPHY_OSC_RDY)
 			cpu_relax();
@@ -888,7 +893,7 @@ static int miphy28lp_setup(struct miphy28lp_phy *miphy_phy, u32 miphy_val)
 	int err;
 	struct miphy28lp_dev *miphy_dev = miphy_phy->phydev;
 
-	if (!miphy_phy->syscfg_miphy_ctrl)
+	if (!miphy_phy->syscfg_reg[SYSCFG_CTRL])
 		return -EINVAL;
 
 	err = reset_control_assert(miphy_phy->miphy_rst);
@@ -900,7 +905,8 @@ static int miphy28lp_setup(struct miphy28lp_phy *miphy_phy, u32 miphy_val)
 	if (miphy_phy->osc_force_ext)
 		miphy_val |= MIPHY_OSC_FORCE_EXT;
 
-	regmap_update_bits(miphy_dev->regmap, miphy_phy->syscfg_miphy_ctrl,
+	regmap_update_bits(miphy_dev->regmap,
+			   miphy_phy->syscfg_reg[SYSCFG_CTRL],
 			   MIPHY_CTRL_MASK, miphy_val);
 
 	err = reset_control_deassert(miphy_phy->miphy_rst);
@@ -917,8 +923,9 @@ static int miphy28lp_init_sata(struct miphy28lp_phy *miphy_phy)
 	struct miphy28lp_dev *miphy_dev = miphy_phy->phydev;
 	int err, sata_conf = SATA_CTRL_SELECT_SATA;
 
-	if ((!miphy_phy->syscfg_sata) || (!miphy_phy->syscfg_pci)
-		|| (!miphy_phy->base))
+	if ((!miphy_phy->syscfg_reg[SYSCFG_SATA]) ||
+			(!miphy_phy->syscfg_reg[SYSCFG_PCI]) ||
+			(!miphy_phy->base))
 		return -EINVAL;
 
 	dev_info(miphy_dev->dev, "sata-up mode, addr 0x%p\n", miphy_phy->base);
@@ -926,10 +933,11 @@ static int miphy28lp_init_sata(struct miphy28lp_phy *miphy_phy)
 	/* Configure the glue-logic */
 	sata_conf |= ((miphy_phy->sata_gen - SATA_GEN1) << SATA_SPDMODE);
 
-	regmap_update_bits(miphy_dev->regmap, miphy_phy->syscfg_sata,
+	regmap_update_bits(miphy_dev->regmap,
+			   miphy_phy->syscfg_reg[SYSCFG_SATA],
 			   SATA_CTRL_MASK, sata_conf);
 
-	regmap_update_bits(miphy_dev->regmap, miphy_phy->syscfg_pci,
+	regmap_update_bits(miphy_dev->regmap, miphy_phy->syscfg_reg[SYSCFG_PCI],
 			   PCIE_CTRL_MASK, SATA_CTRL_SELECT_PCIE);
 
 	/* MiPHY path and clocking init */
@@ -951,17 +959,19 @@ static int miphy28lp_init_pcie(struct miphy28lp_phy *miphy_phy)
 	struct miphy28lp_dev *miphy_dev = miphy_phy->phydev;
 	int err;
 
-	if ((!miphy_phy->syscfg_sata) || (!miphy_phy->syscfg_pci)
+	if ((!miphy_phy->syscfg_reg[SYSCFG_SATA]) ||
+			(!miphy_phy->syscfg_reg[SYSCFG_PCI])
 		|| (!miphy_phy->base) || (!miphy_phy->pipebase))
 		return -EINVAL;
 
 	dev_info(miphy_dev->dev, "pcie-up mode, addr 0x%p\n", miphy_phy->base);
 
 	/* Configure the glue-logic */
-	regmap_update_bits(miphy_dev->regmap, miphy_phy->syscfg_sata,
+	regmap_update_bits(miphy_dev->regmap,
+			   miphy_phy->syscfg_reg[SYSCFG_SATA],
 			   SATA_CTRL_MASK, SATA_CTRL_SELECT_PCIE);
 
-	regmap_update_bits(miphy_dev->regmap, miphy_phy->syscfg_pci,
+	regmap_update_bits(miphy_dev->regmap, miphy_phy->syscfg_reg[SYSCFG_PCI],
 			   PCIE_CTRL_MASK, SYSCFG_PCIE_PCIE_VAL);
 
 	/* MiPHY path and clocking init */
@@ -1156,7 +1166,8 @@ static int miphy28lp_probe_resets(struct device_node *node,
 static int miphy28lp_of_probe(struct device_node *np,
 			      struct miphy28lp_phy *miphy_phy)
 {
-	struct resource res;
+	int i;
+	u32 ctrlreg;
 
 	miphy_phy->osc_force_ext =
 		of_property_read_bool(np, "st,osc-force-ext");
@@ -1175,18 +1186,10 @@ static int miphy28lp_of_probe(struct device_node *np,
 	if (!miphy_phy->sata_gen)
 		miphy_phy->sata_gen = SATA_GEN1;
 
-	if (!miphy28lp_get_resource_byname(np, "miphy-ctrl-glue", &res))
-		miphy_phy->syscfg_miphy_ctrl = res.start;
-
-	if (!miphy28lp_get_resource_byname(np, "miphy-status-glue", &res))
-		miphy_phy->syscfg_miphy_status = res.start;
-
-	if (!miphy28lp_get_resource_byname(np, "pcie-glue", &res))
-		miphy_phy->syscfg_pci = res.start;
-
-	if (!miphy28lp_get_resource_byname(np, "sata-glue", &res))
-		miphy_phy->syscfg_sata = res.start;
-
+	for (i = 0; i < SYSCFG_REG_MAX; i++) {
+		if (!of_property_read_u32_index(np, "st,syscfg", i, &ctrlreg))
+			miphy_phy->syscfg_reg[i] = ctrlreg;
+	}
 
 	return 0;
 }