[U-Boot] [PATCH v1 01/03] spmi: msm: display the PMIC Arb version (debug)

[Jorge Ramirez-Ortiz <jorge.ramirez.ortiz@gmail.com>]

From: Jorge Ramirez-Ortiz <jorge.ramirez-ortiz@linaro.org>

Signed-off-by: Jorge Ramirez-Ortiz <jorge.ramirez-ortiz@linaro.org>
---
 drivers/spmi/spmi-msm.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/drivers/spmi/spmi-msm.c b/drivers/spmi/spmi-msm.c
index c226913..e9bfbb0 100644
--- a/drivers/spmi/spmi-msm.c
+++ b/drivers/spmi/spmi-msm.c
@@ -17,6 +17,11 @@
 
 DECLARE_GLOBAL_DATA_PTR;
 
+
+/* PMIC Arbiter configuration registers */
+#define PMIC_ARB_VERSION		0x0000
+#define PMIC_ARB_VERSION_V2_MIN		0x20010000
+
 #define ARB_CHANNEL_OFFSET(n)		(0x4 * (n))
 #define SPMI_CH_OFFSET(chnl)		((chnl) * 0x8000)
 
@@ -148,6 +153,8 @@ static int msm_spmi_probe(struct udevice *dev)
 	struct udevice *parent = dev->parent;
 	struct msm_spmi_priv *priv = dev_get_priv(dev);
 	int node = dev_of_offset(dev);
+	u32 hw_ver;
+	bool is_v1;
 	int i;
 
 	priv->arb_chnl = devfdt_get_addr(dev);
@@ -155,6 +162,12 @@ static int msm_spmi_probe(struct udevice *dev)
 			dev_of_offset(parent), node, "reg", 1, NULL, false);
 	priv->spmi_obs = fdtdec_get_addr_size_auto_parent(gd->fdt_blob,
 			dev_of_offset(parent), node, "reg", 2, NULL, false);
+
+	hw_ver = readl(priv->arb_chnl + PMIC_ARB_VERSION - 0x800);
+	is_v1  = (hw_ver < PMIC_ARB_VERSION_V2_MIN);
+
+	dev_dbg(dev, "PMIC Arb Version-%d (0x%x)\n", (is_v1 ? 1 : 2), hw_ver);
+
 	if (priv->arb_chnl == FDT_ADDR_T_NONE ||
 	    priv->spmi_core == FDT_ADDR_T_NONE ||
 	    priv->spmi_obs == FDT_ADDR_T_NONE)
-- 
2.7.4