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airoha: an7581: add pending PCI patch
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Add pending PCI patch that should correctly fix mediatek driver with
Airoha SoC.

Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
This commit is contained in:
Christian Marangi 2025-01-17 22:09:05 +01:00
parent 67635578fd
commit f22febae1a
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GPG Key ID: AC001D09ADBFEAD7
8 changed files with 461 additions and 15 deletions
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58
target/linux/airoha/patches-6.6/401-PCI-mediatek-gen3-Rely-on-clk_bulk_prepare_enable-in.patch Normal file
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@ -0,0 +1,58 @@
From 0e7a622da17da0042294860cdb7a2fac091d25b1 Mon Sep 17 00:00:00 2001
Message-ID: <0e7a622da17da0042294860cdb7a2fac091d25b1.1736960708.git.lorenzo@kernel.org>
From: Lorenzo Bianconi <lorenzo@kernel.org>
Date: Wed, 8 Jan 2025 10:50:40 +0100
Subject: [PATCH 1/6] PCI: mediatek-gen3: Rely on clk_bulk_prepare_enable() in
mtk_pcie_en7581_power_up()
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Replace clk_bulk_prepare() and clk_bulk_enable() with
clk_bulk_prepare_enable() in mtk_pcie_en7581_power_up() routine.
Link: https://lore.kernel.org/r/20250108-pcie-en7581-fixes-v6-1-21ac939a3b9b@kernel.org
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
---
drivers/pci/controller/pcie-mediatek-gen3.c | 14 +++-----------
1 file changed, 3 insertions(+), 11 deletions(-)
--- a/drivers/pci/controller/pcie-mediatek-gen3.c
+++ b/drivers/pci/controller/pcie-mediatek-gen3.c
@@ -907,12 +907,6 @@ static int mtk_pcie_en7581_power_up(stru
pm_runtime_enable(dev);
pm_runtime_get_sync(dev);
- err = clk_bulk_prepare(pcie->num_clks, pcie->clks);
- if (err) {
- dev_err(dev, "failed to prepare clock\n");
- goto err_clk_prepare;
- }
-
val = FIELD_PREP(PCIE_VAL_LN0_DOWNSTREAM, 0x47) |
FIELD_PREP(PCIE_VAL_LN1_DOWNSTREAM, 0x47) |
FIELD_PREP(PCIE_VAL_LN0_UPSTREAM, 0x41) |
@@ -925,17 +919,15 @@ static int mtk_pcie_en7581_power_up(stru
FIELD_PREP(PCIE_K_FINETUNE_MAX, 0xf);
writel_relaxed(val, pcie->base + PCIE_PIPE4_PIE8_REG);
- err = clk_bulk_enable(pcie->num_clks, pcie->clks);
+ err = clk_bulk_prepare_enable(pcie->num_clks, pcie->clks);
if (err) {
dev_err(dev, "failed to prepare clock\n");
- goto err_clk_enable;
+ goto err_clk_prepare_enable;
}
return 0;
-err_clk_enable:
- clk_bulk_unprepare(pcie->num_clks, pcie->clks);
-err_clk_prepare:
+err_clk_prepare_enable:
pm_runtime_put_sync(dev);
pm_runtime_disable(dev);
reset_control_bulk_assert(pcie->soc->phy_resets.num_resets, pcie->phy_resets);

89
target/linux/airoha/patches-6.6/402-PCI-mediatek-gen3-Move-reset-assert-callbacks-in-.po.patch Normal file
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From e4c7dfd953f7618f0ccb70d87c1629634f306fab Mon Sep 17 00:00:00 2001
Message-ID: <e4c7dfd953f7618f0ccb70d87c1629634f306fab.1736960708.git.lorenzo@kernel.org>
In-Reply-To: <0e7a622da17da0042294860cdb7a2fac091d25b1.1736960708.git.lorenzo@kernel.org>
References: <0e7a622da17da0042294860cdb7a2fac091d25b1.1736960708.git.lorenzo@kernel.org>
From: Lorenzo Bianconi <lorenzo@kernel.org>
Date: Wed, 8 Jan 2025 10:50:41 +0100
Subject: [PATCH 2/6] PCI: mediatek-gen3: Move reset/assert callbacks in
.power_up()
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
In order to make the code more readable, the reset_control_bulk_assert()
function for PHY reset lines is moved to make it pair with
reset_control_bulk_deassert() in mtk_pcie_power_up() and
mtk_pcie_en7581_power_up(). The same change is done for
reset_control_assert() used to assert MAC reset line.
Introduce PCIE_MTK_RESET_TIME_US macro for the time needed to
complete PCIe reset on MediaTek controller.
Link: https://lore.kernel.org/r/20250108-pcie-en7581-fixes-v6-2-21ac939a3b9b@kernel.org
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
---
drivers/pci/controller/pcie-mediatek-gen3.c | 28 +++++++++++++--------
1 file changed, 18 insertions(+), 10 deletions(-)
--- a/drivers/pci/controller/pcie-mediatek-gen3.c
+++ b/drivers/pci/controller/pcie-mediatek-gen3.c
@@ -120,6 +120,8 @@
#define MAX_NUM_PHY_RESETS 3
+#define PCIE_MTK_RESET_TIME_US 10
+
/* Time in ms needed to complete PCIe reset on EN7581 SoC */
#define PCIE_EN7581_RESET_TIME_MS 100
@@ -875,9 +877,14 @@ static int mtk_pcie_en7581_power_up(stru
u32 val;
/*
- * Wait for the time needed to complete the bulk assert in
- * mtk_pcie_setup for EN7581 SoC.
+ * The controller may have been left out of reset by the bootloader
+ * so make sure that we get a clean start by asserting resets here.
*/
+ reset_control_bulk_assert(pcie->soc->phy_resets.num_resets,
+ pcie->phy_resets);
+ reset_control_assert(pcie->mac_reset);
+
+ /* Wait for the time needed to complete the reset lines assert. */
mdelay(PCIE_EN7581_RESET_TIME_MS);
err = phy_init(pcie->phy);
@@ -944,6 +951,15 @@ static int mtk_pcie_power_up(struct mtk_
struct device *dev = pcie->dev;
int err;
+ /*
+ * The controller may have been left out of reset by the bootloader
+ * so make sure that we get a clean start by asserting resets here.
+ */
+ reset_control_bulk_assert(pcie->soc->phy_resets.num_resets,
+ pcie->phy_resets);
+ reset_control_assert(pcie->mac_reset);
+ usleep_range(PCIE_MTK_RESET_TIME_US, 2 * PCIE_MTK_RESET_TIME_US);
+
/* PHY power on and enable pipe clock */
err = reset_control_bulk_deassert(pcie->soc->phy_resets.num_resets, pcie->phy_resets);
if (err) {
@@ -1016,14 +1032,6 @@ static int mtk_pcie_setup(struct mtk_gen
* counter since the bulk is shared.
*/
reset_control_bulk_deassert(pcie->soc->phy_resets.num_resets, pcie->phy_resets);
- /*
- * The controller may have been left out of reset by the bootloader
- * so make sure that we get a clean start by asserting resets here.
- */
- reset_control_bulk_assert(pcie->soc->phy_resets.num_resets, pcie->phy_resets);
-
- reset_control_assert(pcie->mac_reset);
- usleep_range(10, 20);
/* Don't touch the hardware registers before power up */
err = pcie->soc->power_up(pcie);

38
target/linux/airoha/patches-6.6/403-PCI-mediatek-gen3-Add-comment-about-initialization-o.patch Normal file
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@ -0,0 +1,38 @@
From 0c9d2d2ef0d916b490a9222ed20ff4616fca876d Mon Sep 17 00:00:00 2001
Message-ID: <0c9d2d2ef0d916b490a9222ed20ff4616fca876d.1736960708.git.lorenzo@kernel.org>
In-Reply-To: <0e7a622da17da0042294860cdb7a2fac091d25b1.1736960708.git.lorenzo@kernel.org>
References: <0e7a622da17da0042294860cdb7a2fac091d25b1.1736960708.git.lorenzo@kernel.org>
From: Lorenzo Bianconi <lorenzo@kernel.org>
Date: Wed, 8 Jan 2025 10:50:42 +0100
Subject: [PATCH 3/6] PCI: mediatek-gen3: Add comment about initialization
order in mtk_pcie_en7581_power_up()
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Add a comment in mtk_pcie_en7581_power_up() to clarify, unlike the other
MediaTek Gen3 controllers, the Airoha EN7581 requires PHY initialization
and power-on before PHY reset deassert.
Link: https://lore.kernel.org/r/20250108-pcie-en7581-fixes-v6-3-21ac939a3b9b@kernel.org
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
---
drivers/pci/controller/pcie-mediatek-gen3.c | 4 ++++
1 file changed, 4 insertions(+)
--- a/drivers/pci/controller/pcie-mediatek-gen3.c
+++ b/drivers/pci/controller/pcie-mediatek-gen3.c
@@ -887,6 +887,10 @@ static int mtk_pcie_en7581_power_up(stru
/* Wait for the time needed to complete the reset lines assert. */
mdelay(PCIE_EN7581_RESET_TIME_MS);
+ /*
+ * Unlike the other MediaTek Gen3 controllers, the Airoha EN7581
+ * requires PHY initialization and power-on before PHY reset deassert.
+ */
err = phy_init(pcie->phy);
if (err) {
dev_err(dev, "failed to initialize PHY\n");

62
target/linux/airoha/patches-6.6/404-PCI-mediatek-gen3-Move-reset-delay-in-mtk_pcie_en758.patch Normal file
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@ -0,0 +1,62 @@
From 90d4e466c9ea2010f33880a36317a8486ccbe082 Mon Sep 17 00:00:00 2001
Message-ID: <90d4e466c9ea2010f33880a36317a8486ccbe082.1736960708.git.lorenzo@kernel.org>
In-Reply-To: <0e7a622da17da0042294860cdb7a2fac091d25b1.1736960708.git.lorenzo@kernel.org>
References: <0e7a622da17da0042294860cdb7a2fac091d25b1.1736960708.git.lorenzo@kernel.org>
From: Lorenzo Bianconi <lorenzo@kernel.org>
Date: Wed, 8 Jan 2025 10:50:43 +0100
Subject: [PATCH 4/6] PCI: mediatek-gen3: Move reset delay in
mtk_pcie_en7581_power_up()
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Airoha EN7581 has a hw bug asserting/releasing PCIE_PE_RSTB signal
causing occasional PCIe link down issues. In order to overcome the
problem, PCIe block is reset using REG_PCI_CONTROL (0x88) and
REG_RESET_CONTROL (0x834) registers available in the clock module
running clk_bulk_prepare_enable() in mtk_pcie_en7581_power_up().
In order to make the code more readable, move the wait for the time
needed to complete the PCIe reset from en7581_pci_enable() to
mtk_pcie_en7581_power_up().
Reduce reset timeout from 250ms to the standard PCIE_T_PVPERL_MS value
(100ms) since it has no impact on the driver behavior.
Link: https://lore.kernel.org/r/20250108-pcie-en7581-fixes-v6-4-21ac939a3b9b@kernel.org
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Acked-by: Stephen Boyd <sboyd@kernel.org>
---
drivers/clk/clk-en7523.c | 1 -
drivers/pci/controller/pcie-mediatek-gen3.c | 7 +++++++
2 files changed, 7 insertions(+), 1 deletion(-)
--- a/drivers/clk/clk-en7523.c
+++ b/drivers/clk/clk-en7523.c
@@ -489,7 +489,6 @@ static int en7581_pci_enable(struct clk_
REG_PCI_CONTROL_PERSTOUT;
val = readl(np_base + REG_PCI_CONTROL);
writel(val | mask, np_base + REG_PCI_CONTROL);
- msleep(250);
return 0;
}
--- a/drivers/pci/controller/pcie-mediatek-gen3.c
+++ b/drivers/pci/controller/pcie-mediatek-gen3.c
@@ -936,6 +936,13 @@ static int mtk_pcie_en7581_power_up(stru
goto err_clk_prepare_enable;
}
+ /*
+ * Airoha EN7581 performs PCIe reset via clk callbacks since it has a
+ * hw issue with PCIE_PE_RSTB signal. Add wait for the time needed to
+ * complete the PCIe reset.
+ */
+ msleep(PCIE_T_PVPERL_MS);
+
return 0;
err_clk_prepare_enable:

44
target/linux/airoha/patches-6.6/405-PCI-mediatek-gen3-Rely-on-msleep-in-mtk_pcie_en7581_.patch Normal file
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@ -0,0 +1,44 @@
From c98bee18d0a094e37100c85effe5e161418f8644 Mon Sep 17 00:00:00 2001
Message-ID: <c98bee18d0a094e37100c85effe5e161418f8644.1736960708.git.lorenzo@kernel.org>
In-Reply-To: <0e7a622da17da0042294860cdb7a2fac091d25b1.1736960708.git.lorenzo@kernel.org>
References: <0e7a622da17da0042294860cdb7a2fac091d25b1.1736960708.git.lorenzo@kernel.org>
From: Lorenzo Bianconi <lorenzo@kernel.org>
Date: Wed, 8 Jan 2025 10:50:44 +0100
Subject: [PATCH 5/6] PCI: mediatek-gen3: Rely on msleep() in
mtk_pcie_en7581_power_up()
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Since mtk_pcie_en7581_power_up() runs in non-atomic context, rely on
msleep() routine instead of mdelay().
Link: https://lore.kernel.org/r/20250108-pcie-en7581-fixes-v6-5-21ac939a3b9b@kernel.org
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
---
drivers/pci/controller/pcie-mediatek-gen3.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/drivers/pci/controller/pcie-mediatek-gen3.c
+++ b/drivers/pci/controller/pcie-mediatek-gen3.c
@@ -885,7 +885,7 @@ static int mtk_pcie_en7581_power_up(stru
reset_control_assert(pcie->mac_reset);
/* Wait for the time needed to complete the reset lines assert. */
- mdelay(PCIE_EN7581_RESET_TIME_MS);
+ msleep(PCIE_EN7581_RESET_TIME_MS);
/*
* Unlike the other MediaTek Gen3 controllers, the Airoha EN7581
@@ -913,7 +913,7 @@ static int mtk_pcie_en7581_power_up(stru
* Wait for the time needed to complete the bulk de-assert above.
* This time is specific for EN7581 SoC.
*/
- mdelay(PCIE_EN7581_RESET_TIME_MS);
+ msleep(PCIE_EN7581_RESET_TIME_MS);
pm_runtime_enable(dev);
pm_runtime_get_sync(dev);

131
target/linux/airoha/patches-6.6/406-PCI-mediatek-gen3-Avoid-PCIe-resetting-via-PERST-for.patch Normal file
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@ -0,0 +1,131 @@
From 491cb9c5084790aafa02e843349492c284373231 Mon Sep 17 00:00:00 2001
Message-ID: <491cb9c5084790aafa02e843349492c284373231.1736960708.git.lorenzo@kernel.org>
In-Reply-To: <0e7a622da17da0042294860cdb7a2fac091d25b1.1736960708.git.lorenzo@kernel.org>
References: <0e7a622da17da0042294860cdb7a2fac091d25b1.1736960708.git.lorenzo@kernel.org>
From: Lorenzo Bianconi <lorenzo@kernel.org>
Date: Thu, 9 Jan 2025 00:30:45 +0100
Subject: [PATCH 6/6] PCI: mediatek-gen3: Avoid PCIe resetting via PERST# for
Airoha EN7581 SoC
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Airoha EN7581 has a hw bug asserting/releasing PERST# signal causing
occasional PCIe link down issues. In order to overcome the problem,
PERST# signal is not asserted/released during device probe or
suspend/resume phase and the PCIe block is reset using
en7523_reset_assert() and en7581_pci_enable().
Introduce flags field in the mtk_gen3_pcie_pdata struct in order to
specify per-SoC capabilities.
Link: https://lore.kernel.org/r/20250109-pcie-en7581-rst-fix-v4-1-4a45c89fb143@kernel.org
Tested-by: Hui Ma <hui.ma@airoha.com>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
---
drivers/pci/controller/pcie-mediatek-gen3.c | 59 ++++++++++++++-------
1 file changed, 41 insertions(+), 18 deletions(-)
--- a/drivers/pci/controller/pcie-mediatek-gen3.c
+++ b/drivers/pci/controller/pcie-mediatek-gen3.c
@@ -127,10 +127,18 @@
struct mtk_gen3_pcie;
+enum mtk_gen3_pcie_flags {
+ SKIP_PCIE_RSTB = BIT(0), /* Skip PERST# assertion during device
+ * probing or suspend/resume phase to
+ * avoid hw bugs/issues.
+ */
+};
+
/**
* struct mtk_gen3_pcie_pdata - differentiate between host generations
* @power_up: pcie power_up callback
* @phy_resets: phy reset lines SoC data.
+ * @flags: pcie device flags.
*/
struct mtk_gen3_pcie_pdata {
int (*power_up)(struct mtk_gen3_pcie *pcie);
@@ -138,6 +146,7 @@ struct mtk_gen3_pcie_pdata {
const char *id[MAX_NUM_PHY_RESETS];
int num_resets;
} phy_resets;
+ u32 flags;
};
/**
@@ -404,22 +413,33 @@ static int mtk_pcie_startup_port(struct
val |= PCIE_DISABLE_DVFSRC_VLT_REQ;
writel_relaxed(val, pcie->base + PCIE_MISC_CTRL_REG);
- /* Assert all reset signals */
- val = readl_relaxed(pcie->base + PCIE_RST_CTRL_REG);
- val |= PCIE_MAC_RSTB | PCIE_PHY_RSTB | PCIE_BRG_RSTB | PCIE_PE_RSTB;
- writel_relaxed(val, pcie->base + PCIE_RST_CTRL_REG);
-
/*
- * Described in PCIe CEM specification sections 2.2 (PERST# Signal)
- * and 2.2.1 (Initial Power-Up (G3 to S0)).
- * The deassertion of PERST# should be delayed 100ms (TPVPERL)
- * for the power and clock to become stable.
+ * Airoha EN7581 has a hw bug asserting/releasing PCIE_PE_RSTB signal
+ * causing occasional PCIe link down. In order to overcome the issue,
+ * PCIE_RSTB signals are not asserted/released at this stage and the
+ * PCIe block is reset using en7523_reset_assert() and
+ * en7581_pci_enable().
*/
- msleep(100);
-
- /* De-assert reset signals */
- val &= ~(PCIE_MAC_RSTB | PCIE_PHY_RSTB | PCIE_BRG_RSTB | PCIE_PE_RSTB);
- writel_relaxed(val, pcie->base + PCIE_RST_CTRL_REG);
+ if (!(pcie->soc->flags & SKIP_PCIE_RSTB)) {
+ /* Assert all reset signals */
+ val = readl_relaxed(pcie->base + PCIE_RST_CTRL_REG);
+ val |= PCIE_MAC_RSTB | PCIE_PHY_RSTB | PCIE_BRG_RSTB |
+ PCIE_PE_RSTB;
+ writel_relaxed(val, pcie->base + PCIE_RST_CTRL_REG);
+
+ /*
+ * Described in PCIe CEM specification revision 6.0.
+ *
+ * The deassertion of PERST# should be delayed 100ms (TPVPERL)
+ * for the power and clock to become stable.
+ */
+ msleep(PCIE_T_PVPERL_MS);
+
+ /* De-assert reset signals */
+ val &= ~(PCIE_MAC_RSTB | PCIE_PHY_RSTB | PCIE_BRG_RSTB |
+ PCIE_PE_RSTB);
+ writel_relaxed(val, pcie->base + PCIE_RST_CTRL_REG);
+ }
/* Check if the link is up or not */
err = readl_poll_timeout(pcie->base + PCIE_LINK_STATUS_REG, val,
@@ -1178,10 +1198,12 @@ static int mtk_pcie_suspend_noirq(struct
return err;
}
- /* Pull down the PERST# pin */
- val = readl_relaxed(pcie->base + PCIE_RST_CTRL_REG);
- val |= PCIE_PE_RSTB;
- writel_relaxed(val, pcie->base + PCIE_RST_CTRL_REG);
+ if (!(pcie->soc->flags & SKIP_PCIE_RSTB)) {
+ /* Assert the PERST# pin */
+ val = readl_relaxed(pcie->base + PCIE_RST_CTRL_REG);
+ val |= PCIE_PE_RSTB;
+ writel_relaxed(val, pcie->base + PCIE_RST_CTRL_REG);
+ }
dev_dbg(pcie->dev, "entered L2 states successfully");
@@ -1232,6 +1254,7 @@ static const struct mtk_gen3_pcie_pdata
.id[2] = "phy-lane2",
.num_resets = 3,
},
+ .flags = SKIP_PCIE_RSTB,
};
static const struct of_device_id mtk_pcie_of_match[] = {

28
target/linux/airoha/patches-6.6/112-PCI-mediatek-gen3-configure-PBUS_CSR-registers-for-E.patch → target/linux/airoha/patches-6.6/407-PCI-mediatek-gen3-Configure-PBUS_CSR-registers-for-E.patch
View File

@ -1,11 +1,9 @@
From 2285d3b428c7d8f1c4fda2fb995e7e46a05350e0 Mon Sep 17 00:00:00 2001
Message-ID: <2285d3b428c7d8f1c4fda2fb995e7e46a05350e0.1736324542.git.lorenzo@kernel.org>
In-Reply-To: <0c0ae72f5c84c5a29495337b254ac3cc2d5c16bb.1736324541.git.lorenzo@kernel.org>
References: <0c0ae72f5c84c5a29495337b254ac3cc2d5c16bb.1736324541.git.lorenzo@kernel.org>
From ca4217f3117dceb2d01e179d02031a8758404624 Mon Sep 17 00:00:00 2001
Message-ID: <ca4217f3117dceb2d01e179d02031a8758404624.1736961235.git.lorenzo@kernel.org>
From: Lorenzo Bianconi <lorenzo@kernel.org>
Date: Tue, 3 Sep 2024 23:14:02 +0200
Subject: [PATCH 2/2] PCI: mediatek-gen3: configure PBUS_CSR registers for
EN7581 SoC
Subject: [PATCH] PCI: mediatek-gen3: Configure PBUS_CSR registers for EN7581
SoC
Configure PBus base address and address mask in order to allow the hw
detecting if a given address is on PCIE0, PCIE1 or PCIE2.
@ -33,9 +31,9 @@ Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
#include <linux/reset.h>
#include "../pci.h"
@@ -120,6 +122,13 @@
@@ -122,6 +124,13 @@
#define MAX_NUM_PHY_RESETS 3
#define PCIE_MTK_RESET_TIME_US 10
+#define PCIE_EN7581_PBUS_ADDR(_n) (0x00 + ((_n) << 3))
+#define PCIE_EN7581_PBUS_ADDR_MASK(_n) (0x04 + ((_n) << 3))
@ -47,7 +45,7 @@ Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
/* Time in ms needed to complete PCIe reset on EN7581 SoC */
#define PCIE_EN7581_RESET_TIME_MS 100
@@ -871,7 +880,8 @@ static int mtk_pcie_parse_port(struct mt
@@ -893,7 +902,8 @@ static int mtk_pcie_parse_port(struct mt
static int mtk_pcie_en7581_power_up(struct mtk_gen3_pcie *pcie)
{
struct device *dev = pcie->dev;
@ -57,9 +55,9 @@ Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
u32 val;
/*
@@ -880,6 +890,23 @@ static int mtk_pcie_en7581_power_up(stru
*/
mdelay(PCIE_EN7581_RESET_TIME_MS);
@@ -907,6 +917,23 @@ static int mtk_pcie_en7581_power_up(stru
/* Wait for the time needed to complete the reset lines assert. */
msleep(PCIE_EN7581_RESET_TIME_MS);
+ map = syscon_regmap_lookup_by_compatible("airoha,en7581-pbus-csr");
+ if (IS_ERR(map))
@ -78,6 +76,6 @@ Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
+ regmap_write(map, PCIE_EN7581_PBUS_ADDR_MASK(slot),
+ PCIE_EN7581_PBUS_BASE_ADDR_MASK);
+
err = phy_init(pcie->phy);
if (err) {
dev_err(dev, "failed to initialize PHY\n");
/*
* Unlike the other MediaTek Gen3 controllers, the Airoha EN7581
* requires PHY initialization and power-on before PHY reset deassert.

26
target/linux/airoha/patches-6.6/408-PCI-mediatek-gen3-Remove-mac_reset-assert-leftover-f.patch Normal file
View File

@ -0,0 +1,26 @@
From c4defe43ce17a87e6341d126ba736d9f7ebdc541 Mon Sep 17 00:00:00 2001
Message-ID: <c4defe43ce17a87e6341d126ba736d9f7ebdc541.1736962769.git.lorenzo@kernel.org>
From: Lorenzo Bianconi <lorenzo@kernel.org>
Date: Wed, 15 Jan 2025 18:36:26 +0100
Subject: [PATCH] PCI: mediatek-gen3: Remove mac_reset assert leftover for
Airoha EN7581 SoC.
Remove a leftover assert for mac_reset line in mtk_pcie_en7581_power_up().
This is not armful since EN7581 does not requires mac_reset and
mac_reset is not defined in EN7581 device tree.
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
---
drivers/pci/controller/pcie-mediatek-gen3.c | 1 -
1 file changed, 1 deletion(-)
--- a/drivers/pci/controller/pcie-mediatek-gen3.c
+++ b/drivers/pci/controller/pcie-mediatek-gen3.c
@@ -912,7 +912,6 @@ static int mtk_pcie_en7581_power_up(stru
*/
reset_control_bulk_assert(pcie->soc->phy_resets.num_resets,
pcie->phy_resets);
- reset_control_assert(pcie->mac_reset);
/* Wait for the time needed to complete the reset lines assert. */
msleep(PCIE_EN7581_RESET_TIME_MS);