diff options
| author | Harini Katakam <harini.katakam@xilinx.com> | 2022-07-22 16:33:30 +0530 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2022-07-25 12:29:54 +0100 |
| commit | 8a1c9753f1653f30e508547a971f6a7ed365a4fb (patch) | |
| tree | 42d7015fc7e9f3e7aec48f50ef3338c7bc02f9d1 /drivers/net/ethernet/cadence/macb_main.c | |
| parent | 1d3ded642535cbb30b376dc3b321284762878e11 (diff) | |
net: macb: Update tsu clk usage in runtime suspend/resume for Versal
On Versal TSU clock cannot be disabled irrespective of whether PTP is
used. Hence introduce a new Versal config structure with a "need tsu"
caps flag and check the same in runtime_suspend/resume before cutting
off clocks.
More information on this for future reference:
This is an IP limitation on versions 1p11 and 1p12 when Qbv is enabled
(See designcfg1, bit 3). However it is better to rely on an SoC specific
check rather than the IP version because tsu clk property itself may not
represent actual HW tsu clock on some chip designs.
Signed-off-by: Harini Katakam <harini.katakam@xilinx.com>
Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com>
Reviewed-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/cadence/macb_main.c')
| -rw-r--r-- | drivers/net/ethernet/cadence/macb_main.c | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/drivers/net/ethernet/cadence/macb_main.c b/drivers/net/ethernet/cadence/macb_main.c index 7eb7822cd184..4cd4f57ca2aa 100644 --- a/drivers/net/ethernet/cadence/macb_main.c +++ b/drivers/net/ethernet/cadence/macb_main.c @@ -4773,6 +4773,16 @@ static const struct macb_config sama7g5_emac_config = { .usrio = &sama7g5_usrio, }; +static const struct macb_config versal_config = { + .caps = MACB_CAPS_GIGABIT_MODE_AVAILABLE | MACB_CAPS_JUMBO | + MACB_CAPS_GEM_HAS_PTP | MACB_CAPS_BD_RD_PREFETCH | MACB_CAPS_NEED_TSUCLK, + .dma_burst_length = 16, + .clk_init = macb_clk_init, + .init = init_reset_optional, + .jumbo_max_len = 10240, + .usrio = &macb_default_usrio, +}; + static const struct of_device_id macb_dt_ids[] = { { .compatible = "cdns,at32ap7000-macb" }, { .compatible = "cdns,at91sam9260-macb", .data = &at91sam9260_config }, @@ -4794,6 +4804,7 @@ static const struct of_device_id macb_dt_ids[] = { { .compatible = "microchip,mpfs-macb", .data = &mpfs_config }, { .compatible = "microchip,sama7g5-gem", .data = &sama7g5_gem_config }, { .compatible = "microchip,sama7g5-emac", .data = &sama7g5_emac_config }, + { .compatible = "cdns,versal-gem", .data = &versal_config}, { /* sentinel */ } }; MODULE_DEVICE_TABLE(of, macb_dt_ids); @@ -5203,7 +5214,7 @@ static int __maybe_unused macb_runtime_suspend(struct device *dev) if (!(device_may_wakeup(dev))) macb_clks_disable(bp->pclk, bp->hclk, bp->tx_clk, bp->rx_clk, bp->tsu_clk); - else + else if (!(bp->caps & MACB_CAPS_NEED_TSUCLK)) macb_clks_disable(NULL, NULL, NULL, NULL, bp->tsu_clk); return 0; @@ -5219,8 +5230,10 @@ static int __maybe_unused macb_runtime_resume(struct device *dev) clk_prepare_enable(bp->hclk); clk_prepare_enable(bp->tx_clk); clk_prepare_enable(bp->rx_clk); + clk_prepare_enable(bp->tsu_clk); + } else if (!(bp->caps & MACB_CAPS_NEED_TSUCLK)) { + clk_prepare_enable(bp->tsu_clk); } - clk_prepare_enable(bp->tsu_clk); return 0; } |