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authorYangbo Lu <yangbo.lu@nxp.com>2020-09-18 17:48:01 +0800
committerDavid S. Miller <davem@davemloft.net>2020-09-18 17:49:20 -0700
commit6d23d831e9bd0b1d2bcd9a1ecdc6ac8e6d162c36 (patch)
tree42d2f1227f70842e4576295c01f064aaf7567889 /drivers/ptp
parent8725e9fc61ebe396df89efd3e0245d15e416bb49 (diff)
downloadlinux-6d23d831e9bd0b1d2bcd9a1ecdc6ac8e6d162c36.tar.bz2
ptp_qoriq: support FIPER3
The FIPER3 (fixed interval period pulse generator) is supported on DPAA2 and ENETC network controller hardware. This patch is to support it in ptp_qoriq driver. Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com> Acked-by: Vladimir Oltean <vladimir.oltean@nxp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/ptp')
-rw-r--r--drivers/ptp/ptp_qoriq.c20
1 files changed, 19 insertions, 1 deletions
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);