Merge branch 'ptp_qoriq-support-FIPER3'

Yangbo Lu says:

====================
ptp_qoriq: support FIPER3

The FIPER3 (fixed interval period pulse generator) is supported on
DPAA2 and ENETC network controller hardware. This patch-set is to
support it in ptp_qoriq driver and dt-binding.

Changes for v2:
- Some improvement in code.
- Added ACK from Vladimir.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

3 files changed, 24 insertions, 1 deletions

diff --git a/Documentation/devicetree/bindings/ptp/ptp-qoriq.txt b/Documentation/devicetree/bindings/ptp/ptp-qoriq.txt
index d48f9eb3636e..743eda754e65 100644
--- a/Documentation/devicetree/bindings/ptp/ptp-qoriq.txt
+++ b/Documentation/devicetree/bindings/ptp/ptp-qoriq.txt
@@ -18,6 +18,8 @@ Clock Properties:
   - fsl,tmr-add      Frequency compensation value.
   - fsl,tmr-fiper1   Fixed interval period pulse generator.
   - fsl,tmr-fiper2   Fixed interval period pulse generator.
+  - fsl,tmr-fiper3   Fixed interval period pulse generator.
+                     Supported only on DPAA2 and ENETC hardware.
   - fsl,max-adj      Maximum frequency adjustment in parts per billion.
   - fsl,extts-fifo   The presence of this property indicates hardware
 		     support for the external trigger stamp FIFO.
diff --git a/drivers/ptp/ptp_qoriq.c b/drivers/ptp/ptp_qoriq.c
index c09c16be0edf..beb5f74944cd 100644
--- a/drivers/ptp/ptp_qoriq.c
+++ b/drivers/ptp/ptp_qoriq.c
@@ -72,6 +72,10 @@ static void set_fipers(struct ptp_qoriq *ptp_qoriq)
 	set_alarm(ptp_qoriq);
 	ptp_qoriq->write(&regs->fiper_regs->tmr_fiper1, ptp_qoriq->tmr_fiper1);
 	ptp_qoriq->write(&regs->fiper_regs->tmr_fiper2, ptp_qoriq->tmr_fiper2);
+
+	if (ptp_qoriq->fiper3_support)
+		ptp_qoriq->write(&regs->fiper_regs->tmr_fiper3,
+				 ptp_qoriq->tmr_fiper3);
 }
 
 int extts_clean_up(struct ptp_qoriq *ptp_qoriq, int index, bool update_event)
@@ -366,6 +370,7 @@ static u32 ptp_qoriq_nominal_freq(u32 clk_src)
  *   "fsl,tmr-add"
  *   "fsl,tmr-fiper1"
  *   "fsl,tmr-fiper2"
+ *   "fsl,tmr-fiper3" (required only for DPAA2 and ENETC hardware)
  *   "fsl,max-adj"
  *
  * Return 0 if success
@@ -412,6 +417,7 @@ static int ptp_qoriq_auto_config(struct ptp_qoriq *ptp_qoriq,
 	ptp_qoriq->tmr_add = freq_comp;
 	ptp_qoriq->tmr_fiper1 = DEFAULT_FIPER1_PERIOD - ptp_qoriq->tclk_period;
 	ptp_qoriq->tmr_fiper2 = DEFAULT_FIPER2_PERIOD - ptp_qoriq->tclk_period;
+	ptp_qoriq->tmr_fiper3 = DEFAULT_FIPER3_PERIOD - ptp_qoriq->tclk_period;
 
 	/* max_adj = 1000000000 * (freq_ratio - 1.0) - 1
 	 * freq_ratio = reference_clock_freq / nominal_freq
@@ -446,6 +452,10 @@ int ptp_qoriq_init(struct ptp_qoriq *ptp_qoriq, void __iomem *base,
 	else
 		ptp_qoriq->extts_fifo_support = false;
 
+	if (of_device_is_compatible(node, "fsl,dpaa2-ptp") ||
+	    of_device_is_compatible(node, "fsl,enetc-ptp"))
+		ptp_qoriq->fiper3_support = true;
+
 	if (of_property_read_u32(node,
 				 "fsl,tclk-period", &ptp_qoriq->tclk_period) ||
 	    of_property_read_u32(node,
@@ -457,7 +467,10 @@ int ptp_qoriq_init(struct ptp_qoriq *ptp_qoriq, void __iomem *base,
 	    of_property_read_u32(node,
 				 "fsl,tmr-fiper2", &ptp_qoriq->tmr_fiper2) ||
 	    of_property_read_u32(node,
-				 "fsl,max-adj", &ptp_qoriq->caps.max_adj)) {
+				 "fsl,max-adj", &ptp_qoriq->caps.max_adj) ||
+	    (ptp_qoriq->fiper3_support &&
+	     of_property_read_u32(node, "fsl,tmr-fiper3",
+				  &ptp_qoriq->tmr_fiper3))) {
 		pr_warn("device tree node missing required elements, try automatic configuration\n");
 
 		if (ptp_qoriq_auto_config(ptp_qoriq, node))
@@ -502,6 +515,11 @@ int ptp_qoriq_init(struct ptp_qoriq *ptp_qoriq, void __iomem *base,
 	ptp_qoriq->write(&regs->ctrl_regs->tmr_prsc, ptp_qoriq->tmr_prsc);
 	ptp_qoriq->write(&regs->fiper_regs->tmr_fiper1, ptp_qoriq->tmr_fiper1);
 	ptp_qoriq->write(&regs->fiper_regs->tmr_fiper2, ptp_qoriq->tmr_fiper2);
+
+	if (ptp_qoriq->fiper3_support)
+		ptp_qoriq->write(&regs->fiper_regs->tmr_fiper3,
+				 ptp_qoriq->tmr_fiper3);
+
 	set_alarm(ptp_qoriq);
 	ptp_qoriq->write(&regs->ctrl_regs->tmr_ctrl,
 			 tmr_ctrl|FIPERST|RTPE|TE|FRD);
diff --git a/include/linux/fsl/ptp_qoriq.h b/include/linux/fsl/ptp_qoriq.h
index 884b8f8ca06d..01acebe37fab 100644
--- a/include/linux/fsl/ptp_qoriq.h
+++ b/include/linux/fsl/ptp_qoriq.h
@@ -136,6 +136,7 @@ struct ptp_qoriq_registers {
 #define DEFAULT_TMR_PRSC	2
 #define DEFAULT_FIPER1_PERIOD	1000000000
 #define DEFAULT_FIPER2_PERIOD	1000000000
+#define DEFAULT_FIPER3_PERIOD	1000000000
 
 struct ptp_qoriq {
 	void __iomem *base;
@@ -147,6 +148,7 @@ struct ptp_qoriq {
 	struct dentry *debugfs_root;
 	struct device *dev;
 	bool extts_fifo_support;
+	bool fiper3_support;
 	int irq;
 	int phc_index;
 	u32 tclk_period;  /* nanoseconds */
@@ -155,6 +157,7 @@ struct ptp_qoriq {
 	u32 cksel;
 	u32 tmr_fiper1;
 	u32 tmr_fiper2;
+	u32 tmr_fiper3;
 	u32 (*read)(unsigned __iomem *addr);
 	void (*write)(unsigned __iomem *addr, u32 val);
 };