[5.10.y-cip,31/61] ravb: Add reset support

Message ID	20220110122331.24114-32-prabhakar.mahadev-lad.rj@bp.renesas.com (mailing list archive)
State	Accepted
Delegated to:	Pavel Machek
Headers	show Return-Path: <prabhakar.mahadev-lad.rj@bp.renesas.com> ip: 210.160.252.172, mailfrom: prabhakar.mahadev-lad.rj@bp.renesas.com) From: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com> To: cip-dev@lists.cip-project.org, Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@toshiba.co.jp>, Pavel Machek <pavel@denx.de> Cc: Biju Das <biju.das.jz@bp.renesas.com> Subject: [PATCH 5.10.y-cip 31/61] ravb: Add reset support Date: Mon, 10 Jan 2022 12:23:01 +0000 Message-Id: <20220110122331.24114-32-prabhakar.mahadev-lad.rj@bp.renesas.com> In-Reply-To: <20220110122331.24114-1-prabhakar.mahadev-lad.rj@bp.renesas.com> References: <20220110122331.24114-1-prabhakar.mahadev-lad.rj@bp.renesas.com>
Series	Add Ethernet support to RZ/G2L \| expand [5.10.y-cip,00/61] Add Ethernet support to RZ/G2L [5.10.y-cip,01/61] dt-bindings: net: renesas,etheravb: Add additional clocks [5.10.y-cip,02/61] dt-bindings: net: renesas,etheravb: Fix optional second clock name [5.10.y-cip,03/61] dt-bindings: net: renesas,etheravb: Document Gigabit Ethernet IP [5.10.y-cip,04/61] dt-bindings: net: renesas,etheravb: Drop "int_" prefix and "_n" suffix from inte… [5.10.y-cip,05/61] net: ethernet: ravb: Enable optional refclk [5.10.y-cip,06/61] net: ethernet: ravb: Fix release of refclk [5.10.y-cip,07/61] net: ethernet: ravb: Use devm_platform_get_and_ioremap_resource() [5.10.y-cip,08/61] ravb: Fix a typo in comment [5.10.y-cip,09/61] ravb: Remove checks for unsupported internal delay modes [5.10.y-cip,10/61] ravb: Use unsigned int for num_tx_desc variable in struct ravb_private [5.10.y-cip,11/61] ravb: Add struct ravb_hw_info to driver data [5.10.y-cip,12/61] ravb: Add aligned_tx to struct ravb_hw_info [5.10.y-cip,13/61] ravb: Add max_rx_len to struct ravb_hw_info [5.10.y-cip,14/61] ravb: Add stats_len to struct ravb_hw_info [5.10.y-cip,15/61] ravb: Add gstrings_stats and gstrings_size to struct ravb_hw_info [5.10.y-cip,16/61] ravb: Add net_features and net_hw_features to struct ravb_hw_info [5.10.y-cip,17/61] ravb: Add internal delay hw feature to struct ravb_hw_info [5.10.y-cip,18/61] ravb: Add tx_counters to struct ravb_hw_info [5.10.y-cip,19/61] ravb: Remove the macros NUM_TX_DESC_GEN[23] [5.10.y-cip,20/61] ravb: Add multi_irq to struct ravb_hw_info [5.10.y-cip,21/61] ravb: Add no_ptp_cfg_active to struct ravb_hw_info [5.10.y-cip,22/61] ravb: Add ptp_cfg_active to struct ravb_hw_info [5.10.y-cip,23/61] ravb: Factorise ravb_ring_free function [5.10.y-cip,24/61] ravb: Factorise ravb_ring_format function [5.10.y-cip,25/61] ravb: Factorise ravb_ring_init function [5.10.y-cip,26/61] ravb: Factorise ravb_rx function [5.10.y-cip,27/61] ravb: Factorise ravb_adjust_link function [5.10.y-cip,28/61] ravb: Factorise ravb_set_features [5.10.y-cip,29/61] ravb: Factorise ravb_dmac_init function [5.10.y-cip,30/61] ravb: Factorise ravb_emac_init function [5.10.y-cip,31/61] ravb: Add reset support [5.10.y-cip,32/61] ravb: Rename "ravb_set_features_rx_csum" function to "ravb_set_features_rcar" [5.10.y-cip,33/61] ravb: Rename "no_ptp_cfg_active" and "ptp_cfg_active" variables [5.10.y-cip,34/61] ravb: Add nc_queue to struct ravb_hw_info [5.10.y-cip,35/61] ravb: Add support for RZ/G2L SoC [5.10.y-cip,36/61] ravb: Initialize GbEthernet DMAC [5.10.y-cip,37/61] ravb: remove APSR_DM [5.10.y-cip,38/61] ravb: Exclude gPTP feature support for RZ/G2L [5.10.y-cip,39/61] ravb: Add tsrq to struct ravb_hw_info [5.10.y-cip,40/61] ravb: Add magic_pkt to struct ravb_hw_info [5.10.y-cip,41/61] ravb: Add half_duplex to struct ravb_hw_info [5.10.y-cip,42/61] ravb: update "undocumented" annotations [5.10.y-cip,43/61] ravb: Remove extra TAB [5.10.y-cip,44/61] ravb: Initialize GbEthernet E-MAC [5.10.y-cip,45/61] ravb: Add rx_max_buf_size to struct ravb_hw_info [5.10.y-cip,46/61] ravb: Use ALIGN macro for max_rx_len [5.10.y-cip,47/61] ravb: Fillup ravb_alloc_rx_desc_gbeth() stub [5.10.y-cip,48/61] ravb: Fillup ravb_rx_ring_free_gbeth() stub [5.10.y-cip,49/61] ravb: Fillup ravb_rx_ring_format_gbeth() stub [5.10.y-cip,50/61] ravb: Fillup ravb_rx_gbeth() stub [5.10.y-cip,51/61] ravb: Add carrier_counters to struct ravb_hw_info [5.10.y-cip,52/61] ravb: Add support to retrieve stats for GbEthernet [5.10.y-cip,53/61] ravb: Rename "tsrq" variable [5.10.y-cip,54/61] ravb: Optimize ravb_emac_init_gbeth function [5.10.y-cip,55/61] ravb: Rename "nc_queue" feature bit [5.10.y-cip,56/61] ravb: Update ravb_emac_init_gbeth() [5.10.y-cip,57/61] ravb: Fix typo AVB->DMAC [5.10.y-cip,58/61] clk: renesas: r9a07g044: Add ethernet clock sources [5.10.y-cip,59/61] clk: renesas: r9a07g044: Add GbEthernet clock/reset [5.10.y-cip,60/61] arm64: dts: renesas: r9a07g044: Add GbEthernet nodes [5.10.y-cip,61/61] arm64: dts: renesas: rzg2l-smarc-som: Enable Ethernet

Message ID

20220110122331.24114-32-prabhakar.mahadev-lad.rj@bp.renesas.com (mailing list archive)

State

Accepted

Delegated to:

Pavel Machek

Headers

From: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
To: cip-dev@lists.cip-project.org,
	Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@toshiba.co.jp>,
	Pavel Machek <pavel@denx.de>
Cc: Biju Das <biju.das.jz@bp.renesas.com>
Subject: [PATCH 5.10.y-cip 31/61] ravb: Add reset support
Date: Mon, 10 Jan 2022 12:23:01 +0000
Message-Id: <20220110122331.24114-32-prabhakar.mahadev-lad.rj@bp.renesas.com>
In-Reply-To: <20220110122331.24114-1-prabhakar.mahadev-lad.rj@bp.renesas.com>
References: <20220110122331.24114-1-prabhakar.mahadev-lad.rj@bp.renesas.com>

Series

Add Ethernet support to RZ/G2L | expand

Commit Message

Lad Prabhakar Jan. 10, 2022, 12:23 p.m. UTC

From: Biju Das <biju.das.jz@bp.renesas.com>

commit 0d13a1a464a023379291218ac051e2bf8f46b5d1 upstream.

Reset support is present on R-Car. Let's support it, if it is
available.

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
---
 drivers/net/ethernet/renesas/ravb.h      |  1 +
 drivers/net/ethernet/renesas/ravb_main.c | 11 +++++++++++
 2 files changed, 12 insertions(+)

diff --git a/drivers/net/ethernet/renesas/ravb.h b/drivers/net/ethernet/renesas/ravb.h
index 5af2391d417c..b41806e58135 100644
--- a/drivers/net/ethernet/renesas/ravb.h
+++ b/drivers/net/ethernet/renesas/ravb.h
@@ -1058,6 +1058,7 @@  struct ravb_private {
 	unsigned int num_tx_desc;	/* TX descriptors per packet */
 
 	const struct ravb_hw_info *info;
+	struct reset_control *rstc;
 };
 
 static inline u32 ravb_read(struct net_device *ndev, enum ravb_reg reg)
diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c
index 74c49c32e778..d5f6aa782b56 100644
--- a/drivers/net/ethernet/renesas/ravb_main.c
+++ b/drivers/net/ethernet/renesas/ravb_main.c
@@ -29,6 +29,7 @@ 
 #include <linux/slab.h>
 #include <linux/spinlock.h>
 #include <linux/sys_soc.h>
+#include <linux/reset.h>
 
 #include <asm/div64.h>
 
@@ -2138,6 +2139,7 @@  static int ravb_probe(struct platform_device *pdev)
 {
 	struct device_node *np = pdev->dev.of_node;
 	const struct ravb_hw_info *info;
+	struct reset_control *rstc;
 	struct ravb_private *priv;
 	struct net_device *ndev;
 	int error, irq, q;
@@ -2150,6 +2152,11 @@  static int ravb_probe(struct platform_device *pdev)
 		return -EINVAL;
 	}
 
+	rstc = devm_reset_control_get_optional_exclusive(&pdev->dev, NULL);
+	if (IS_ERR(rstc))
+		return dev_err_probe(&pdev->dev, PTR_ERR(rstc),
+				     "failed to get cpg reset\n");
+
 	ndev = alloc_etherdev_mqs(sizeof(struct ravb_private),
 				  NUM_TX_QUEUE, NUM_RX_QUEUE);
 	if (!ndev)
@@ -2160,6 +2167,7 @@  static int ravb_probe(struct platform_device *pdev)
 	ndev->features = info->net_features;
 	ndev->hw_features = info->net_hw_features;
 
+	reset_control_deassert(rstc);
 	pm_runtime_enable(&pdev->dev);
 	pm_runtime_get_sync(&pdev->dev);
 
@@ -2177,6 +2185,7 @@  static int ravb_probe(struct platform_device *pdev)
 
 	priv = netdev_priv(ndev);
 	priv->info = info;
+	priv->rstc = rstc;
 	priv->ndev = ndev;
 	priv->pdev = pdev;
 	priv->num_tx_ring[RAVB_BE] = BE_TX_RING_SIZE;
@@ -2347,6 +2356,7 @@  static int ravb_probe(struct platform_device *pdev)
 
 	pm_runtime_put(&pdev->dev);
 	pm_runtime_disable(&pdev->dev);
+	reset_control_assert(rstc);
 	return error;
 }
 
@@ -2372,6 +2382,7 @@  static int ravb_remove(struct platform_device *pdev)
 	netif_napi_del(&priv->napi[RAVB_BE]);
 	ravb_mdio_release(priv);
 	pm_runtime_disable(&pdev->dev);
+	reset_control_assert(priv->rstc);
 	free_netdev(ndev);
 	platform_set_drvdata(pdev, NULL);

[5.10.y-cip,31/61] ravb: Add reset support

Commit Message

Patch