From: Andrey Smirnov <andrew.smirnov@gmail.com>
To: linux-pci@vger.kernel.org
Cc: Andrey Smirnov <andrew.smirnov@gmail.com>,
Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
Bjorn Helgaas <bhelgaas@google.com>,
Fabio Estevam <fabio.estevam@nxp.com>,
Chris Healy <cphealy@gmail.com>,
Lucas Stach <l.stach@pengutronix.de>,
Leonard Crestez <leonard.crestez@nxp.com>,
"A.s. Dong" <aisheng.dong@nxp.com>,
Richard Zhu <hongxing.zhu@nxp.com>,
linux-imx@nxp.com, linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Subject: [PATCH 09/21] PCI: imx6: Drop imx6_pcie_link_up()
Date: Thu, 20 Dec 2018 23:27:04 -0800 [thread overview]
Message-ID: <20181221072716.29017-10-andrew.smirnov@gmail.com> (raw)
In-Reply-To: <20181221072716.29017-1-andrew.smirnov@gmail.com>
Until commit 4d107d3b5a68 ("PCI: imx6: Move link up check into
imx6_pcie_wait_for_link()") the driver relied on both LINK_UP and
LINK_IN_TRAINING to determine if PCIE link was up.
I can't seem to find out why, but code using LINK_IN_TRAINING seem to
disappear after commit 886bc5ceb5cc ("PCI: designware: Add generic
dw_pcie_wait_for_link()") and from then on only LINK_UP seems to be
tested (dw_pcie_wait_for_link() -> dw_pcie_link_up() ->
imx6_pcie_link_up()).
At the same time the default behavior of dw_pcie_link_up() went from
using just LINK_UP in commit dac29e6c5460 ("PCI: designware: Add
default link up check if sub-driver doesn't override") to using both
LINK_IN_TRAINING and LINK_UP in commit 01c076732e82 ("PCI: designware:
Check LTSSM training bit before deciding link is up").
Given all that it seems that i.MX6 doesn't really need a special
.link_up() callback and imx6_pcie_link_up() can be dropped.
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Fabio Estevam <fabio.estevam@nxp.com>
Cc: Chris Healy <cphealy@gmail.com>
Cc: Lucas Stach <l.stach@pengutronix.de>
Cc: Leonard Crestez <leonard.crestez@nxp.com>
Cc: "A.s. Dong" <aisheng.dong@nxp.com>
Cc: Richard Zhu <hongxing.zhu@nxp.com>
Cc: linux-imx@nxp.com
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
Cc: linux-pci@vger.kernel.org
Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
---
drivers/pci/controller/dwc/pci-imx6.c | 12 +-----------
1 file changed, 1 insertion(+), 11 deletions(-)
diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c
index 937d630f8c9d..74faca11eeae 100644
--- a/drivers/pci/controller/dwc/pci-imx6.c
+++ b/drivers/pci/controller/dwc/pci-imx6.c
@@ -84,8 +84,6 @@ struct imx6_pcie {
#define PL_OFFSET 0x700
#define PCIE_PHY_DEBUG_R0 (PL_OFFSET + 0x28)
#define PCIE_PHY_DEBUG_R1 (PL_OFFSET + 0x2c)
-#define PCIE_PHY_DEBUG_R1_XMLH_LINK_IN_TRAINING (1 << 29)
-#define PCIE_PHY_DEBUG_R1_XMLH_LINK_UP (1 << 4)
#define PCIE_PHY_CTRL (PL_OFFSET + 0x114)
#define PCIE_PHY_CTRL_DATA_LOC 0
@@ -732,12 +730,6 @@ static int imx6_pcie_host_init(struct pcie_port *pp)
return 0;
}
-static int imx6_pcie_link_up(struct dw_pcie *pci)
-{
- return dw_pcie_readl_dbi(pci, PCIE_PHY_DEBUG_R1) &
- PCIE_PHY_DEBUG_R1_XMLH_LINK_UP;
-}
-
static const struct dw_pcie_host_ops imx6_pcie_host_ops = {
.host_init = imx6_pcie_host_init,
};
@@ -769,9 +761,7 @@ static int imx6_add_pcie_port(struct imx6_pcie *imx6_pcie,
return 0;
}
-static const struct dw_pcie_ops dw_pcie_ops = {
- .link_up = imx6_pcie_link_up,
-};
+static const struct dw_pcie_ops dw_pcie_ops;
#ifdef CONFIG_PM_SLEEP
static void imx6_pcie_ltssm_disable(struct device *dev)
--
2.19.1
next prev parent reply other threads:[~2018-12-21 7:29 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-12-21 7:26 [PATCH 00/21] i.MX6, DesignWare PCI improvements Andrey Smirnov
2018-12-21 7:26 ` [PATCH 01/21] PCI: imx6: Simplify imx7d_pcie_wait_for_phy_pll_lock() Andrey Smirnov
2018-12-21 7:26 ` [PATCH 02/21] PCI: imx6: Remove redundant debug tracing Andrey Smirnov
2018-12-21 7:26 ` [PATCH 03/21] PCI: imx6: Return -ETIMEOUT from imx6_pcie_wait_for_speed_change() Andrey Smirnov
2018-12-21 7:26 ` [PATCH 04/21] PCI: imx6: Remove duplicate macro definitions Andrey Smirnov
2018-12-21 7:27 ` [PATCH 05/21] PCI: imx6: Remove PCIE_PL_PFLR_* constants Andrey Smirnov
2018-12-21 7:27 ` [PATCH 06/21] PCI: imx6: Remove PCIE_PHY_RX_ASIC_OUT* constants Andrey Smirnov
2018-12-21 7:27 ` [PATCH 07/21] PCI: designware: Make use of IS_ALIGNED() Andrey Smirnov
2019-01-02 9:33 ` Gustavo Pimentel
2019-01-04 18:37 ` Joe Perches
2019-01-04 18:52 ` Andrey Smirnov
2018-12-21 7:27 ` [PATCH 08/21] PCI: designware: Share code for dw_pcie_rd/wr_other_conf() Andrey Smirnov
2019-01-02 10:21 ` Gustavo Pimentel
2018-12-21 7:27 ` Andrey Smirnov [this message]
2018-12-21 18:55 ` [PATCH 09/21] PCI: imx6: Drop imx6_pcie_link_up() Trent Piepho
2018-12-22 0:39 ` Andrey Smirnov
2018-12-21 7:27 ` [PATCH 10/21] PCI: designware: imx6: Share PHY debug register definitions Andrey Smirnov
2018-12-21 7:27 ` [PATCH 11/21] PCI: designware: Make use of BIT() in constant definitions Andrey Smirnov
2018-12-26 15:14 ` Gustavo Pimentel
2019-01-02 18:28 ` Andrey Smirnov
2019-01-02 18:31 ` Gustavo Pimentel
2018-12-21 7:27 ` [PATCH 12/21] PCI: imx6: " Andrey Smirnov
2018-12-21 7:27 ` [PATCH 13/21] PCI: imx6: Simplify bit operations in PHY functions Andrey Smirnov
2018-12-21 7:27 ` [PATCH 14/21] PCI: imx6: Simplify pcie_phy_poll_ack() Andrey Smirnov
2018-12-21 7:27 ` [PATCH 15/21] PCI: imx6: Restrict PHY register data to 16-bit Andrey Smirnov
2018-12-21 7:27 ` [PATCH 16/21] PCI: imx6: Pass data to dw_pcie_writel_dbi() directly Andrey Smirnov
2018-12-21 7:27 ` [PATCH 17/21] PCI: imx6: Use common mask in imx6_pcie_reset_phy() Andrey Smirnov
2018-12-21 7:27 ` [PATCH 18/21] PCI: imx6: Simplify bit operations in imx6_setup_phy_mpll() Andrey Smirnov
2018-12-21 7:27 ` [PATCH 19/21] PCI: imx6: Remove magic numbers from imx6_pcie_establish_link() Andrey Smirnov
2018-12-21 7:27 ` [PATCH 20/21] PCI: designware: Make use of GENMASK/FIELD_PREP Andrey Smirnov
2018-12-26 15:07 ` Gustavo Pimentel
2018-12-21 7:27 ` [PATCH 21/21] PCI: designware: Remove superfluous shifting in definitions Andrey Smirnov
2018-12-26 14:49 ` Gustavo Pimentel
2018-12-26 15:26 ` [PATCH 00/21] i.MX6, DesignWare PCI improvements Gustavo Pimentel
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20181221072716.29017-10-andrew.smirnov@gmail.com \
--to=andrew.smirnov@gmail.com \
--cc=aisheng.dong@nxp.com \
--cc=bhelgaas@google.com \
--cc=cphealy@gmail.com \
--cc=fabio.estevam@nxp.com \
--cc=hongxing.zhu@nxp.com \
--cc=l.stach@pengutronix.de \
--cc=leonard.crestez@nxp.com \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-imx@nxp.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-pci@vger.kernel.org \
--cc=lorenzo.pieralisi@arm.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).