diff options
| author | Yangbo Lu <yangbo.lu@nxp.com> | 2020-09-18 11:48:01 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2020-09-19 02:49:20 +0200 |
| commit | 6d23d831e9bd0b1d2bcd9a1ecdc6ac8e6d162c36 (patch) | |
| tree | 42d2f1227f70842e4576295c01f064aaf7567889 /drivers/ptp | |
| parent | dt-binding: ptp_qoriq: support fsl,tmr-fiper3 property (diff) | |
| download | linux-6d23d831e9bd0b1d2bcd9a1ecdc6ac8e6d162c36.tar.xz linux-6d23d831e9bd0b1d2bcd9a1ecdc6ac8e6d162c36.zip | |
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.c | 20 |
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(®s->fiper_regs->tmr_fiper1, ptp_qoriq->tmr_fiper1); ptp_qoriq->write(®s->fiper_regs->tmr_fiper2, ptp_qoriq->tmr_fiper2); + + if (ptp_qoriq->fiper3_support) + ptp_qoriq->write(®s->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(®s->ctrl_regs->tmr_prsc, ptp_qoriq->tmr_prsc); ptp_qoriq->write(®s->fiper_regs->tmr_fiper1, ptp_qoriq->tmr_fiper1); ptp_qoriq->write(®s->fiper_regs->tmr_fiper2, ptp_qoriq->tmr_fiper2); + + if (ptp_qoriq->fiper3_support) + ptp_qoriq->write(®s->fiper_regs->tmr_fiper3, + ptp_qoriq->tmr_fiper3); + set_alarm(ptp_qoriq); ptp_qoriq->write(®s->ctrl_regs->tmr_ctrl, tmr_ctrl|FIPERST|RTPE|TE|FRD); |