[RESEND PATCH v2 0/4] Add support of eMMC PHY for Intel Thunder

[RESEND PATCH v2 0/4] Add support of eMMC PHY for Intel Thunder

[rashmi.a]

From: Rashmi A <rashmi.a@intel.com>

This patch set enables the support for eMMC PHY on the Intel Thunder
Bay SoC. eMMC PHY is based on arasan phy.

Patch 1 Adds arasan sdhci support for eMMC in Intel Thunder Bay.
Patch 2 Adds arasan sdhci dt bindings.
Patch 3 Holds the device tree binding documentation for eMMC PHY
	and listings of new files in MAINTAINERS file.
Patch 4 Holds the eMMC PHY driver.

Reseding V2 patchset to get the dt-binding patches reviewed.

Changes from v1:
Add arasan sdhci dt bindings

Rashmi A (4):
  mmc: sdhci-of-arasan: Add intel Thunder Bay SOC support to the arasan
    eMMC driver
  dt-bindings: mmc: Add bindings for Intel Thunder Bay SoC
  dt-bindings: phy: intel: Add Thunder Bay eMMC PHY bindings
  phy: intel: Add Thunder Bay eMMC PHY support

 .../devicetree/bindings/mmc/arasan,sdhci.yaml |  25 +
 .../phy/intel,phy-thunderbay-emmc.yaml        |  46 ++
 MAINTAINERS                                   |   7 +
 drivers/mmc/host/sdhci-of-arasan.c            |  29 +-
 drivers/phy/intel/Kconfig                     |  10 +
 drivers/phy/intel/Makefile                    |   1 +
 drivers/phy/intel/phy-intel-thunderbay-emmc.c | 511 ++++++++++++++++++
 7 files changed, 628 insertions(+), 1 deletion(-)
 create mode 100644 Documentation/devicetree/bindings/phy/intel,phy-thunderbay-emmc.yaml
 create mode 100644 drivers/phy/intel/phy-intel-thunderbay-emmc.c

-- 
2.17.1

[RESEND PATCH v2 1/4] mmc: sdhci-of-arasan: Add intel Thunder Bay SOC support to the arasan eMMC driver

[rashmi.a]

From: Rashmi A <rashmi.a@intel.com>

Intel Thunder Bay SoC eMMC controller is based on Arasan
eMMC 5.1 host controller IP

Signed-off-by: Rashmi A <rashmi.a@intel.com>
Reviewed-by: Adrian Hunter <adrian.hunter@intel.com>
---
 drivers/mmc/host/sdhci-of-arasan.c | 29 ++++++++++++++++++++++++++++-
 1 file changed, 28 insertions(+), 1 deletion(-)

diff --git a/drivers/mmc/host/sdhci-of-arasan.c b/drivers/mmc/host/sdhci-of-arasan.c
index 737e2bfdedc2..6a2e5a468424 100644
--- a/drivers/mmc/host/sdhci-of-arasan.c
+++ b/drivers/mmc/host/sdhci-of-arasan.c
@@ -191,6 +191,13 @@ static const struct sdhci_arasan_soc_ctl_map intel_lgm_sdxc_soc_ctl_map = {
 	.hiword_update = false,
 };
 
+static const struct sdhci_arasan_soc_ctl_map thunderbay_soc_ctl_map = {
+	.baseclkfreq = { .reg = 0x0, .width = 8, .shift = 14 },
+	.clockmultiplier = { .reg = 0x4, .width = 8, .shift = 14 },
+	.support64b = { .reg = 0x4, .width = 1, .shift = 24 },
+	.hiword_update = false,
+};
+
 static const struct sdhci_arasan_soc_ctl_map intel_keembay_soc_ctl_map = {
 	.baseclkfreq = { .reg = 0x0, .width = 8, .shift = 14 },
 	.clockmultiplier = { .reg = 0x4, .width = 8, .shift = 14 },
@@ -456,6 +463,15 @@ static const struct sdhci_pltfm_data sdhci_arasan_cqe_pdata = {
 			SDHCI_QUIRK2_CLOCK_DIV_ZERO_BROKEN,
 };
 
+static const struct sdhci_pltfm_data sdhci_arasan_thunderbay_pdata = {
+	.ops = &sdhci_arasan_cqe_ops,
+	.quirks = SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN | SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
+	.quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
+		SDHCI_QUIRK2_CLOCK_DIV_ZERO_BROKEN |
+		SDHCI_QUIRK2_STOP_WITH_TC |
+		SDHCI_QUIRK2_CAPS_BIT63_FOR_HS400,
+};
+
 #ifdef CONFIG_PM_SLEEP
 /**
  * sdhci_arasan_suspend - Suspend method for the driver
@@ -1132,6 +1148,12 @@ static struct sdhci_arasan_of_data sdhci_arasan_generic_data = {
 	.clk_ops = &arasan_clk_ops,
 };
 
+static const struct sdhci_arasan_of_data sdhci_arasan_thunderbay_data = {
+	.soc_ctl_map = &thunderbay_soc_ctl_map,
+	.pdata = &sdhci_arasan_thunderbay_pdata,
+	.clk_ops = &arasan_clk_ops,
+};
+
 static const struct sdhci_pltfm_data sdhci_keembay_emmc_pdata = {
 	.ops = &sdhci_arasan_cqe_ops,
 	.quirks = SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN |
@@ -1265,6 +1287,10 @@ static const struct of_device_id sdhci_arasan_of_match[] = {
 		.compatible = "intel,keembay-sdhci-5.1-sdio",
 		.data = &intel_keembay_sdio_data,
 	},
+	{
+		.compatible = "intel,thunderbay-sdhci-5.1",
+		.data = &sdhci_arasan_thunderbay_data,
+	},
 	/* Generic compatible below here */
 	{
 		.compatible = "arasan,sdhci-8.9a",
@@ -1626,7 +1652,8 @@ static int sdhci_arasan_probe(struct platform_device *pdev)
 
 	if (of_device_is_compatible(np, "intel,keembay-sdhci-5.1-emmc") ||
 	    of_device_is_compatible(np, "intel,keembay-sdhci-5.1-sd") ||
-	    of_device_is_compatible(np, "intel,keembay-sdhci-5.1-sdio")) {
+	    of_device_is_compatible(np, "intel,keembay-sdhci-5.1-sdio") ||
+	    of_device_is_compatible(np, "intel,thunderbay-sdhci-5.1")) {
 		sdhci_arasan_update_clockmultiplier(host, 0x0);
 		sdhci_arasan_update_support64b(host, 0x0);
 
-- 
2.17.1

[RESEND PATCH v2 2/4] dt-bindings: mmc: Add bindings for Intel Thunder Bay SoC

[rashmi.a]

From: Rashmi A <rashmi.a@intel.com>

Add documentation for Arasan SDHCI controller in Thunder Bay SOC.

Signed-off-by: Rashmi A <rashmi.a@intel.com>
---
 .../devicetree/bindings/mmc/arasan,sdhci.yaml | 25 +++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/Documentation/devicetree/bindings/mmc/arasan,sdhci.yaml b/Documentation/devicetree/bindings/mmc/arasan,sdhci.yaml
index 37a5fe7b26dc..23abb7e8b9d8 100644
--- a/Documentation/devicetree/bindings/mmc/arasan,sdhci.yaml
+++ b/Documentation/devicetree/bindings/mmc/arasan,sdhci.yaml
@@ -88,6 +88,12 @@ properties:
         description:
           For this device it is strongly suggested to include
           arasan,soc-ctl-syscon.
+      - items:
+          - const: intel,thunderbay-sdhci-5.1   # Intel Thunder Bay eMMC PHY
+          - const: arasan,sdhci-5.1
+        description:
+          For this device it is strongly suggested to include
+          clock-output-names and '#clock-cells'.
 
   reg:
     maxItems: 1
@@ -301,3 +307,22 @@ examples:
                    <&scmi_clk KEEM_BAY_PSS_SD0>;
           arasan,soc-ctl-syscon = <&sd0_phy_syscon>;
     };
+
+  - |
+    #define EMMC_XIN_CLK
+    #define EMMC_AXI_CLK
+    #define TBH_PSS_EMMC_RST_N
+    mmc@80420000 {
+          compatible = "intel,thunderbay-sdhci-5.1", "arasan,sdhci-5.1";
+          interrupts = <GIC_SPI 714 IRQ_TYPE_LEVEL_HIGH>;
+          reg = <0x80420000 0x400>;
+          clocks = <&scmi_clk EMMC_XIN_CLK>,
+                   <&scmi_clk EMMC_AXI_CLK>;
+          clock-names = "clk_xin", "clk_ahb";
+          phys = <&emmc_phy>;
+          phy-names = "phy_arasan";
+          assigned-clocks = <&scmi_clk EMMC_XIN_CLK>;
+          clock-output-names = "emmc_cardclock";
+          resets = <&rst_pss1 TBH_PSS_EMMC_RST_N>;
+          #clock-cells = <0x0>;
+    };
-- 
2.17.1

[RESEND PATCH v2 3/4] dt-bindings: phy: intel: Add Thunder Bay eMMC PHY bindings

[rashmi.a]

From: Rashmi A <rashmi.a@intel.com>

Binding description for Intel Thunder Bay eMMC PHY.
Added the newly introduced files into MAINTAINERS file-list

Signed-off-by: Rashmi A <rashmi.a@intel.com>
---
 .../phy/intel,phy-thunderbay-emmc.yaml        | 46 +++++++++++++++++++
 MAINTAINERS                                   |  7 +++
 2 files changed, 53 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/phy/intel,phy-thunderbay-emmc.yaml

diff --git a/Documentation/devicetree/bindings/phy/intel,phy-thunderbay-emmc.yaml b/Documentation/devicetree/bindings/phy/intel,phy-thunderbay-emmc.yaml
new file mode 100644
index 000000000000..34bdb5c4cae8
--- /dev/null
+++ b/Documentation/devicetree/bindings/phy/intel,phy-thunderbay-emmc.yaml
@@ -0,0 +1,46 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/phy/intel,phy-thunderbay-emmc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Intel Thunder Bay eMMC PHY bindings
+
+maintainers:
+  - Srikandan Nandhini <nandhini.srikandan@intel.com>
+
+properties:
+  compatible:
+    const: intel,thunderbay-emmc-phy
+
+  "#phy-cells":
+    const: 0
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  clock-names:
+    items:
+      - const: emmcclk
+
+required:
+  - "#phy-cells"
+  - compatible
+  - reg
+  - clocks
+
+additionalProperties: false
+
+examples:
+  - |
+     mmc_phy@80440800 {
+     #phy-cells = <0x0>;
+     compatible = "intel,thunderbay-emmc-phy";
+     status = "okay";
+     reg = <0x80440800 0x100>;
+     clocks = <&emmc>;
+     clock-names = "emmcclk";
+     };
diff --git a/MAINTAINERS b/MAINTAINERS
index f26920f0fa65..126f568e60ae 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -9529,6 +9529,13 @@ F:	drivers/crypto/keembay/keembay-ocs-hcu-core.c
 F:	drivers/crypto/keembay/ocs-hcu.c
 F:	drivers/crypto/keembay/ocs-hcu.h
 
+INTEL THUNDER BAY EMMC PHY DRIVER
+M:	Nandhini Srikandan <nandhini.srikandan@intel.com>
+M:	Rashmi A <rashmi.a@intel.com>
+S:	Maintained
+F:	Documentation/devicetree/bindings/phy/intel,phy-thunderbay-emmc.yaml
+F:	drivers/phy/intel/phy-intel-thunderbay-emmc.c
+
 INTEL MANAGEMENT ENGINE (mei)
 M:	Tomas Winkler <tomas.winkler@intel.com>
 L:	linux-kernel@vger.kernel.org
-- 
2.17.1

Re: [RESEND PATCH v2 3/4] dt-bindings: phy: intel: Add Thunder Bay eMMC PHY bindings

[Rob Herring]

On Wed, 27 Oct 2021 17:25:15 +0530, rashmi.a@intel.com wrote:
> From: Rashmi A <rashmi.a@intel.com>
> 
> Binding description for Intel Thunder Bay eMMC PHY.
> Added the newly introduced files into MAINTAINERS file-list
> 
> Signed-off-by: Rashmi A <rashmi.a@intel.com>
> ---
>  .../phy/intel,phy-thunderbay-emmc.yaml        | 46 +++++++++++++++++++
>  MAINTAINERS                                   |  7 +++
>  2 files changed, 53 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/phy/intel,phy-thunderbay-emmc.yaml
> 

Reviewed-by: Rob Herring <robh@kernel.org>

Re: [RESEND PATCH v2 3/4] dt-bindings: phy: intel: Add Thunder Bay eMMC PHY bindings

[Vinod Koul]

On 27-10-21, 17:25, rashmi.a@intel.com wrote:
> From: Rashmi A <rashmi.a@intel.com>
> 
> Binding description for Intel Thunder Bay eMMC PHY.
> Added the newly introduced files into MAINTAINERS file-list

Applied, thanks

-- 
~Vinod

[RESEND PATCH v2 4/4] phy: intel: Add Thunder Bay eMMC PHY support

[rashmi.a]

From: Rashmi A <rashmi.a@intel.com>

Add support of eMMC PHY for Intel Thunder Bay SoC,
uses the Arasan eMMC phy

Signed-off-by: Rashmi A <rashmi.a@intel.com>
Reviewed-by: Adrian Hunter <adrian.hunter@intel.com>
---
 drivers/phy/intel/Kconfig                     |  10 +
 drivers/phy/intel/Makefile                    |   1 +
 drivers/phy/intel/phy-intel-thunderbay-emmc.c | 511 ++++++++++++++++++
 3 files changed, 522 insertions(+)
 create mode 100644 drivers/phy/intel/phy-intel-thunderbay-emmc.c

diff --git a/drivers/phy/intel/Kconfig b/drivers/phy/intel/Kconfig
index ac42bb2fb394..18a3cc5b98c0 100644
--- a/drivers/phy/intel/Kconfig
+++ b/drivers/phy/intel/Kconfig
@@ -46,3 +46,13 @@ config PHY_INTEL_LGM_EMMC
 	select GENERIC_PHY
 	help
 	  Enable this to support the Intel EMMC PHY
+
+config PHY_INTEL_THUNDERBAY_EMMC
+        tristate "Intel Thunder Bay eMMC PHY driver"
+        depends on OF && (ARCH_THUNDERBAY || COMPILE_TEST)
+        select GENERIC_PHY
+        help
+	  This option enables support for Intel Thunder Bay SoC eMMC PHY.
+
+	  To compile this driver as a module, choose M here: the module
+	  will be called phy-intel-thunderbay-emmc.ko.
diff --git a/drivers/phy/intel/Makefile b/drivers/phy/intel/Makefile
index 14550981a707..b7321d56b0bb 100644
--- a/drivers/phy/intel/Makefile
+++ b/drivers/phy/intel/Makefile
@@ -3,3 +3,4 @@ obj-$(CONFIG_PHY_INTEL_KEEMBAY_EMMC)	+= phy-intel-keembay-emmc.o
 obj-$(CONFIG_PHY_INTEL_KEEMBAY_USB)	+= phy-intel-keembay-usb.o
 obj-$(CONFIG_PHY_INTEL_LGM_COMBO)	+= phy-intel-lgm-combo.o
 obj-$(CONFIG_PHY_INTEL_LGM_EMMC)	+= phy-intel-lgm-emmc.o
+obj-$(CONFIG_PHY_INTEL_THUNDERBAY_EMMC) += phy-intel-thunderbay-emmc.o
diff --git a/drivers/phy/intel/phy-intel-thunderbay-emmc.c b/drivers/phy/intel/phy-intel-thunderbay-emmc.c
new file mode 100644
index 000000000000..2d6ea84492f2
--- /dev/null
+++ b/drivers/phy/intel/phy-intel-thunderbay-emmc.c
@@ -0,0 +1,511 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Intel ThunderBay eMMC PHY driver
+ *
+ * Copyright (C) 2021 Intel Corporation
+ *
+ */
+
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/iopoll.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/phy/phy.h>
+#include <linux/platform_device.h>
+
+/* eMMC/SD/SDIO core/phy configuration registers */
+#define CTRL_CFG_0	0x00
+#define CTRL_CFG_1	0x04
+#define CTRL_PRESET_0	0x08
+#define CTRL_PRESET_1	0x0c
+#define CTRL_PRESET_2	0x10
+#define CTRL_PRESET_3	0x14
+#define CTRL_PRESET_4	0x18
+#define CTRL_CFG_2	0x1c
+#define CTRL_CFG_3	0x20
+#define PHY_CFG_0	0x24
+#define PHY_CFG_1	0x28
+#define PHY_CFG_2	0x2c
+#define PHYBIST_CTRL	0x30
+#define SDHC_STAT3	0x34
+#define PHY_STAT	0x38
+#define PHYBIST_STAT_0	0x3c
+#define PHYBIST_STAT_1	0x40
+#define EMMC_AXI        0x44
+
+/* CTRL_PRESET_3 */
+#define CTRL_PRESET3_MASK	GENMASK(31, 0)
+#define CTRL_PRESET3_SHIFT	0
+
+/* CTRL_CFG_0 bit fields */
+#define SUPPORT_HS_MASK		BIT(26)
+#define SUPPORT_HS_SHIFT	26
+
+#define SUPPORT_8B_MASK		BIT(24)
+#define SUPPORT_8B_SHIFT	24
+
+/* CTRL_CFG_1 bit fields */
+#define SUPPORT_SDR50_MASK	BIT(28)
+#define SUPPORT_SDR50_SHIFT	28
+#define SLOT_TYPE_MASK		GENMASK(27, 26)
+#define SLOT_TYPE_OFFSET	26
+#define SUPPORT_64B_MASK	BIT(24)
+#define SUPPORT_64B_SHIFT	24
+#define SUPPORT_HS400_MASK	BIT(2)
+#define SUPPORT_HS400_SHIFT	2
+#define SUPPORT_DDR50_MASK	BIT(1)
+#define SUPPORT_DDR50_SHIFT	1
+#define SUPPORT_SDR104_MASK	BIT(0)
+#define SUPPORT_SDR104_SHIFT	0
+
+/* PHY_CFG_0 bit fields */
+#define SEL_DLY_TXCLK_MASK      BIT(29)
+#define SEL_DLY_TXCLK_SHIFT	29
+#define SEL_DLY_RXCLK_MASK      BIT(28)
+#define SEL_DLY_RXCLK_SHIFT	28
+
+#define OTAP_DLY_ENA_MASK	BIT(27)
+#define OTAP_DLY_ENA_SHIFT	27
+#define OTAP_DLY_SEL_MASK	GENMASK(26, 23)
+#define OTAP_DLY_SEL_SHIFT	23
+#define ITAP_CHG_WIN_MASK	BIT(22)
+#define ITAP_CHG_WIN_SHIFT	22
+#define ITAP_DLY_ENA_MASK	BIT(21)
+#define ITAP_DLY_ENA_SHIFT	21
+#define ITAP_DLY_SEL_MASK	GENMASK(20, 16)
+#define ITAP_DLY_SEL_SHIFT	16
+#define RET_ENB_MASK		BIT(15)
+#define RET_ENB_SHIFT		15
+#define RET_EN_MASK		BIT(14)
+#define RET_EN_SHIFT		14
+#define DLL_IFF_MASK		GENMASK(13, 11)
+#define DLL_IFF_SHIFT		11
+#define DLL_EN_MASK		BIT(10)
+#define DLL_EN_SHIFT		10
+#define DLL_TRIM_ICP_MASK	GENMASK(9, 6)
+#define DLL_TRIM_ICP_SHIFT	6
+#define RETRIM_EN_MASK		BIT(5)
+#define RETRIM_EN_SHIFT		5
+#define RETRIM_MASK		BIT(4)
+#define RETRIM_SHIFT		4
+#define DR_TY_MASK		GENMASK(3, 1)
+#define DR_TY_SHIFT		1
+#define PWR_DOWN_MASK		BIT(0)
+#define PWR_DOWN_SHIFT		0
+
+/* PHY_CFG_1 bit fields */
+#define REN_DAT_MASK		GENMASK(19, 12)
+#define REN_DAT_SHIFT		12
+#define REN_CMD_MASK		BIT(11)
+#define REN_CMD_SHIFT		11
+#define REN_STRB_MASK		BIT(10)
+#define REN_STRB_SHIFT		10
+#define PU_STRB_MASK		BIT(20)
+#define PU_STRB_SHIFT		20
+
+/* PHY_CFG_2 bit fields */
+#define CLKBUF_MASK		GENMASK(24, 21)
+#define CLKBUF_SHIFT		21
+#define SEL_STRB_MASK		GENMASK(20, 13)
+#define SEL_STRB_SHIFT		13
+#define SEL_FREQ_MASK		GENMASK(12, 10)
+#define SEL_FREQ_SHIFT		10
+
+/* PHY_STAT bit fields */
+#define CAL_DONE		BIT(6)
+#define DLL_RDY			BIT(5)
+
+#define OTAP_DLY		0x0
+#define ITAP_DLY		0x0
+#define STRB			0x33
+
+/* From ACS_eMMC51_16nFFC_RO1100_Userguide_v1p0.pdf p17 */
+#define FREQSEL_200M_170M	0x0
+#define FREQSEL_170M_140M	0x1
+#define FREQSEL_140M_110M	0x2
+#define FREQSEL_110M_80M	0x3
+#define FREQSEL_80M_50M		0x4
+#define FREQSEL_275M_250M	0x5
+#define FREQSEL_250M_225M	0x6
+#define FREQSEL_225M_200M	0x7
+
+/* Phy power status */
+#define PHY_UNINITIALIZED	0
+#define PHY_INITIALIZED		1
+
+/*
+ * During init(400KHz) phy_settings will be called with 200MHZ clock
+ * To avoid incorrectly setting the phy for init(400KHZ) "phy_power_sts" is used.
+ * When actual clock is set always phy is powered off once and then powered on.
+ * (sdhci_arasan_set_clock). That feature will be used to identify whether the
+ * settings are for init phy_power_on or actual clock phy_power_on
+ * 0 --> init settings
+ * 1 --> actual settings
+ */
+
+struct thunderbay_emmc_phy {
+	void __iomem    *reg_base;
+	struct clk      *emmcclk;
+	int phy_power_sts;
+};
+
+static inline void update_reg(struct thunderbay_emmc_phy *tbh_phy, u32 offset,
+			      u32 mask, u32 shift, u32 val)
+{
+	u32 tmp;
+
+	tmp = readl(tbh_phy->reg_base + offset);
+	tmp &= ~mask;
+	tmp |= val << shift;
+	writel(tmp, tbh_phy->reg_base + offset);
+}
+
+static int thunderbay_emmc_phy_power(struct phy *phy, bool power_on)
+{
+	struct thunderbay_emmc_phy *tbh_phy = phy_get_drvdata(phy);
+	unsigned int freqsel = FREQSEL_200M_170M;
+	unsigned long rate;
+	static int lock;
+	u32 val;
+	int ret;
+
+	/* Disable DLL */
+	rate = clk_get_rate(tbh_phy->emmcclk);
+	switch (rate) {
+	case 200000000:
+		/* lock dll only when it is used, i.e only if SEL_DLY_TXCLK/RXCLK are 0 */
+		update_reg(tbh_phy, PHY_CFG_0, DLL_EN_MASK, DLL_EN_SHIFT, 0x0);
+		break;
+
+	/* dll lock not required for other frequencies */
+	case 50000000 ... 52000000:
+	case 400000:
+	default:
+		break;
+	}
+
+	if (!power_on)
+		return 0;
+
+	rate = clk_get_rate(tbh_phy->emmcclk);
+	switch (rate) {
+	case 170000001 ... 200000000:
+		freqsel = FREQSEL_200M_170M;
+		break;
+
+	case 140000001 ... 170000000:
+		freqsel = FREQSEL_170M_140M;
+		break;
+
+	case 110000001 ... 140000000:
+		freqsel = FREQSEL_140M_110M;
+		break;
+
+	case 80000001 ... 110000000:
+		freqsel = FREQSEL_110M_80M;
+		break;
+
+	case 50000000 ... 80000000:
+		freqsel = FREQSEL_80M_50M;
+		break;
+
+	case 250000001 ... 275000000:
+		freqsel = FREQSEL_275M_250M;
+		break;
+
+	case 225000001 ... 250000000:
+		freqsel = FREQSEL_250M_225M;
+		break;
+
+	case 200000001 ... 225000000:
+		freqsel = FREQSEL_225M_200M;
+		break;
+	default:
+		break;
+	}
+	/* Clock rate is checked against upper limit. It may fall low during init */
+	if (rate > 200000000)
+		dev_warn(&phy->dev, "Unsupported rate: %lu\n", rate);
+
+	udelay(5);
+
+	if (lock == 0) {
+		/* PDB will be done only once per boot */
+		update_reg(tbh_phy, PHY_CFG_0, PWR_DOWN_MASK,
+			   PWR_DOWN_SHIFT, 0x1);
+		lock = 1;
+		/*
+		 * According to the user manual, it asks driver to wait 5us for
+		 * calpad busy trimming. However it is documented that this value is
+		 * PVT(A.K.A. process, voltage and temperature) relevant, so some
+		 * failure cases are found which indicates we should be more tolerant
+		 * to calpad busy trimming.
+		 */
+		ret = readl_poll_timeout(tbh_phy->reg_base + PHY_STAT,
+					 val, (val & CAL_DONE), 10, 50);
+		if (ret) {
+			dev_err(&phy->dev, "caldone failed, ret=%d\n", ret);
+			return ret;
+		}
+	}
+	rate = clk_get_rate(tbh_phy->emmcclk);
+	switch (rate) {
+	case 200000000:
+		/* Set frequency of the DLL operation */
+		update_reg(tbh_phy, PHY_CFG_2, SEL_FREQ_MASK, SEL_FREQ_SHIFT, freqsel);
+
+		/* Enable DLL */
+		update_reg(tbh_phy, PHY_CFG_0, DLL_EN_MASK, DLL_EN_SHIFT, 0x1);
+
+		/*
+		 * After enabling analog DLL circuits docs say that we need 10.2 us if
+		 * our source clock is at 50 MHz and that lock time scales linearly
+		 * with clock speed. If we are powering on the PHY and the card clock
+		 * is super slow (like 100kHz) this could take as long as 5.1 ms as
+		 * per the math: 10.2 us * (50000000 Hz / 100000 Hz) => 5.1 ms
+		 * hopefully we won't be running at 100 kHz, but we should still make
+		 * sure we wait long enough.
+		 *
+		 * NOTE: There appear to be corner cases where the DLL seems to take
+		 * extra long to lock for reasons that aren't understood. In some
+		 * extreme cases we've seen it take up to over 10ms (!). We'll be
+		 * generous and give it 50ms.
+		 */
+		ret = readl_poll_timeout(tbh_phy->reg_base + PHY_STAT,
+					 val, (val & DLL_RDY), 10, 50 * USEC_PER_MSEC);
+		if (ret) {
+			dev_err(&phy->dev, "dllrdy failed, ret=%d\n", ret);
+			return ret;
+		}
+		break;
+
+	default:
+		break;
+	}
+	return 0;
+}
+
+static int thunderbay_emmc_phy_init(struct phy *phy)
+{
+	struct thunderbay_emmc_phy *tbh_phy = phy_get_drvdata(phy);
+
+	tbh_phy->emmcclk = clk_get(&phy->dev, "emmcclk");
+
+	return PTR_ERR_OR_ZERO(tbh_phy->emmcclk);
+}
+
+static int thunderbay_emmc_phy_exit(struct phy *phy)
+{
+	struct thunderbay_emmc_phy *tbh_phy = phy_get_drvdata(phy);
+
+	clk_put(tbh_phy->emmcclk);
+
+	return 0;
+}
+
+static int thunderbay_emmc_phy_power_on(struct phy *phy)
+{
+	struct thunderbay_emmc_phy *tbh_phy = phy_get_drvdata(phy);
+	unsigned long rate;
+
+	/* Overwrite capability bits configurable in bootloader */
+	update_reg(tbh_phy, CTRL_CFG_0,
+		   SUPPORT_HS_MASK, SUPPORT_HS_SHIFT, 0x1);
+	update_reg(tbh_phy, CTRL_CFG_0,
+		   SUPPORT_8B_MASK, SUPPORT_8B_SHIFT, 0x1);
+	update_reg(tbh_phy, CTRL_CFG_1,
+		   SUPPORT_SDR50_MASK, SUPPORT_SDR50_SHIFT, 0x1);
+	update_reg(tbh_phy, CTRL_CFG_1,
+		   SUPPORT_DDR50_MASK, SUPPORT_DDR50_SHIFT, 0x1);
+	update_reg(tbh_phy, CTRL_CFG_1,
+		   SUPPORT_SDR104_MASK, SUPPORT_SDR104_SHIFT, 0x1);
+	update_reg(tbh_phy, CTRL_CFG_1,
+		   SUPPORT_HS400_MASK, SUPPORT_HS400_SHIFT, 0x1);
+	update_reg(tbh_phy, CTRL_CFG_1,
+		   SUPPORT_64B_MASK, SUPPORT_64B_SHIFT, 0x1);
+
+	if (tbh_phy->phy_power_sts == PHY_UNINITIALIZED) {
+		/* Indicates initialization, settings for init, same as 400KHZ setting */
+		update_reg(tbh_phy, PHY_CFG_0, SEL_DLY_TXCLK_MASK, SEL_DLY_TXCLK_SHIFT, 0x1);
+		update_reg(tbh_phy, PHY_CFG_0, SEL_DLY_RXCLK_MASK, SEL_DLY_RXCLK_SHIFT, 0x1);
+		update_reg(tbh_phy, PHY_CFG_0, ITAP_DLY_ENA_MASK, ITAP_DLY_ENA_SHIFT, 0x0);
+		update_reg(tbh_phy, PHY_CFG_0, ITAP_DLY_SEL_MASK, ITAP_DLY_SEL_SHIFT, 0x0);
+		update_reg(tbh_phy, PHY_CFG_0, OTAP_DLY_ENA_MASK, OTAP_DLY_ENA_SHIFT, 0x0);
+		update_reg(tbh_phy, PHY_CFG_0, OTAP_DLY_SEL_MASK, OTAP_DLY_SEL_SHIFT, 0);
+		update_reg(tbh_phy, PHY_CFG_0, DLL_TRIM_ICP_MASK, DLL_TRIM_ICP_SHIFT, 0);
+		update_reg(tbh_phy, PHY_CFG_0, DR_TY_MASK, DR_TY_SHIFT, 0x1);
+
+	} else if (tbh_phy->phy_power_sts == PHY_INITIALIZED) {
+		/* Indicates actual clock setting */
+		rate = clk_get_rate(tbh_phy->emmcclk);
+		switch (rate) {
+		case 200000000:
+			update_reg(tbh_phy, PHY_CFG_0, SEL_DLY_TXCLK_MASK,
+				   SEL_DLY_TXCLK_SHIFT, 0x0);
+			update_reg(tbh_phy, PHY_CFG_0, SEL_DLY_RXCLK_MASK,
+				   SEL_DLY_RXCLK_SHIFT, 0x0);
+			update_reg(tbh_phy, PHY_CFG_0, ITAP_DLY_ENA_MASK,
+				   ITAP_DLY_ENA_SHIFT, 0x0);
+			update_reg(tbh_phy, PHY_CFG_0, ITAP_DLY_SEL_MASK,
+				   ITAP_DLY_SEL_SHIFT, 0x0);
+			update_reg(tbh_phy, PHY_CFG_0, OTAP_DLY_ENA_MASK,
+				   OTAP_DLY_ENA_SHIFT, 0x1);
+			update_reg(tbh_phy, PHY_CFG_0, OTAP_DLY_SEL_MASK,
+				   OTAP_DLY_SEL_SHIFT, 2);
+			update_reg(tbh_phy, PHY_CFG_0, DLL_TRIM_ICP_MASK,
+				   DLL_TRIM_ICP_SHIFT, 0x8);
+			update_reg(tbh_phy, PHY_CFG_0, DR_TY_MASK,
+				   DR_TY_SHIFT, 0x1);
+			/* For HS400 only */
+			update_reg(tbh_phy, PHY_CFG_2, SEL_STRB_MASK,
+				   SEL_STRB_SHIFT, STRB);
+			break;
+
+		case 50000000 ... 52000000:
+			/* For both HS and DDR52 this setting works */
+			update_reg(tbh_phy, PHY_CFG_0, SEL_DLY_TXCLK_MASK,
+				   SEL_DLY_TXCLK_SHIFT, 0x1);
+			update_reg(tbh_phy, PHY_CFG_0, SEL_DLY_RXCLK_MASK,
+				   SEL_DLY_RXCLK_SHIFT, 0x1);
+			update_reg(tbh_phy, PHY_CFG_0, ITAP_DLY_ENA_MASK,
+				   ITAP_DLY_ENA_SHIFT, 0x0);
+			update_reg(tbh_phy, PHY_CFG_0, ITAP_DLY_SEL_MASK,
+				   ITAP_DLY_SEL_SHIFT, 0x0);
+			update_reg(tbh_phy, PHY_CFG_0, OTAP_DLY_ENA_MASK,
+				   OTAP_DLY_ENA_SHIFT, 0x1);
+			update_reg(tbh_phy, PHY_CFG_0, OTAP_DLY_SEL_MASK,
+				   OTAP_DLY_SEL_SHIFT, 4);
+			update_reg(tbh_phy, PHY_CFG_0, DLL_TRIM_ICP_MASK,
+				   DLL_TRIM_ICP_SHIFT, 0x8);
+			update_reg(tbh_phy, PHY_CFG_0,
+				   DR_TY_MASK, DR_TY_SHIFT, 0x1);
+			break;
+
+		case 400000:
+			update_reg(tbh_phy, PHY_CFG_0, SEL_DLY_TXCLK_MASK,
+				   SEL_DLY_TXCLK_SHIFT, 0x1);
+			update_reg(tbh_phy, PHY_CFG_0, SEL_DLY_RXCLK_MASK,
+				   SEL_DLY_RXCLK_SHIFT, 0x1);
+			update_reg(tbh_phy, PHY_CFG_0, ITAP_DLY_ENA_MASK,
+				   ITAP_DLY_ENA_SHIFT, 0x0);
+			update_reg(tbh_phy, PHY_CFG_0, ITAP_DLY_SEL_MASK,
+				   ITAP_DLY_SEL_SHIFT, 0x0);
+			update_reg(tbh_phy, PHY_CFG_0, OTAP_DLY_ENA_MASK,
+				   OTAP_DLY_ENA_SHIFT, 0x0);
+			update_reg(tbh_phy, PHY_CFG_0, OTAP_DLY_SEL_MASK,
+				   OTAP_DLY_SEL_SHIFT, 0);
+			update_reg(tbh_phy, PHY_CFG_0, DLL_TRIM_ICP_MASK,
+				   DLL_TRIM_ICP_SHIFT, 0);
+			update_reg(tbh_phy, PHY_CFG_0, DR_TY_MASK, DR_TY_SHIFT, 0x1);
+			break;
+
+		default:
+			update_reg(tbh_phy, PHY_CFG_0, SEL_DLY_TXCLK_MASK,
+				   SEL_DLY_TXCLK_SHIFT, 0x1);
+			update_reg(tbh_phy, PHY_CFG_0, SEL_DLY_RXCLK_MASK,
+				   SEL_DLY_RXCLK_SHIFT, 0x1);
+			update_reg(tbh_phy, PHY_CFG_0, ITAP_DLY_ENA_MASK,
+				   ITAP_DLY_ENA_SHIFT, 0x0);
+			update_reg(tbh_phy, PHY_CFG_0, ITAP_DLY_SEL_MASK,
+				   ITAP_DLY_SEL_SHIFT, 0x0);
+			update_reg(tbh_phy, PHY_CFG_0, OTAP_DLY_ENA_MASK,
+				   OTAP_DLY_ENA_SHIFT, 0x1);
+			update_reg(tbh_phy, PHY_CFG_0, OTAP_DLY_SEL_MASK,
+				   OTAP_DLY_SEL_SHIFT, 2);
+			update_reg(tbh_phy, PHY_CFG_0, DLL_TRIM_ICP_MASK,
+				   DLL_TRIM_ICP_SHIFT, 0x8);
+			update_reg(tbh_phy, PHY_CFG_0, DR_TY_MASK,
+				   DR_TY_SHIFT, 0x1);
+			break;
+		}
+		/* Reset, init seq called without phy_power_off, this indicates init seq */
+		tbh_phy->phy_power_sts = PHY_UNINITIALIZED;
+	}
+
+	update_reg(tbh_phy, PHY_CFG_0, RETRIM_EN_MASK, RETRIM_EN_SHIFT, 0x1);
+	update_reg(tbh_phy, PHY_CFG_0, RETRIM_MASK, RETRIM_SHIFT, 0x0);
+
+	return thunderbay_emmc_phy_power(phy, 1);
+}
+
+static int thunderbay_emmc_phy_power_off(struct phy *phy)
+{
+	struct thunderbay_emmc_phy *tbh_phy = phy_get_drvdata(phy);
+
+	tbh_phy->phy_power_sts = PHY_INITIALIZED;
+
+	return thunderbay_emmc_phy_power(phy, 0);
+}
+
+static const struct phy_ops thunderbay_emmc_phy_ops = {
+	.init		= thunderbay_emmc_phy_init,
+	.exit		= thunderbay_emmc_phy_exit,
+	.power_on	= thunderbay_emmc_phy_power_on,
+	.power_off	= thunderbay_emmc_phy_power_off,
+	.owner		= THIS_MODULE,
+};
+
+static const struct of_device_id thunderbay_emmc_phy_of_match[] = {
+	{ .compatible = "intel,thunderbay-emmc-phy",
+		(void *)&thunderbay_emmc_phy_ops },
+	{}
+};
+MODULE_DEVICE_TABLE(of, thunderbay_emmc_phy_of_match);
+
+static int thunderbay_emmc_phy_probe(struct platform_device *pdev)
+{
+	struct thunderbay_emmc_phy *tbh_phy;
+	struct phy_provider *phy_provider;
+	struct device *dev = &pdev->dev;
+	const struct of_device_id *id;
+	struct phy *generic_phy;
+	struct resource *res;
+
+	if (!dev->of_node)
+		return -ENODEV;
+
+	tbh_phy = devm_kzalloc(dev, sizeof(*tbh_phy), GFP_KERNEL);
+	if (!tbh_phy)
+		return -ENOMEM;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	tbh_phy->reg_base = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(tbh_phy->reg_base)) {
+		dev_err(&pdev->dev, "region map failed\n");
+		return PTR_ERR(tbh_phy->reg_base);
+	}
+
+	tbh_phy->phy_power_sts = PHY_UNINITIALIZED;
+	id = of_match_node(thunderbay_emmc_phy_of_match, pdev->dev.of_node);
+	if (!id) {
+		dev_err(dev, "failed to get match_node\n");
+		return -EINVAL;
+	}
+
+	generic_phy = devm_phy_create(dev, dev->of_node, id->data);
+	if (IS_ERR(generic_phy)) {
+		dev_err(dev, "failed to create PHY\n");
+		return PTR_ERR(generic_phy);
+	}
+
+	phy_set_drvdata(generic_phy, tbh_phy);
+	phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
+
+	return PTR_ERR_OR_ZERO(phy_provider);
+}
+
+static struct platform_driver thunderbay_emmc_phy_driver = {
+	.probe		 = thunderbay_emmc_phy_probe,
+	.driver		 = {
+		.name	 = "thunderbay-emmc-phy",
+		.of_match_table = thunderbay_emmc_phy_of_match,
+	},
+};
+module_platform_driver(thunderbay_emmc_phy_driver);
+
+MODULE_AUTHOR("Nandhini S <nandhini.srikandan@intel.com>");
+MODULE_AUTHOR("Rashmi A <rashmi.a@intel.com>");
+MODULE_DESCRIPTION("Intel Thunder Bay eMMC PHY driver");
+MODULE_LICENSE("GPL v2");
-- 
2.17.1

RE: [RESEND PATCH v2 4/4] phy: intel: Add Thunder Bay eMMC PHY support

[A, Rashmi]

> -----Original Message-----
> From: A, Rashmi <rashmi.a@intel.com>
> Sent: Wednesday, October 27, 2021 5:25 PM
> To: michal.simek@xilinx.com; ulf.hansson@linaro.org; linux-
> mmc@vger.kernel.org; linux-arm-kernel@lists.infradead.org;
> robh+dt@kernel.org; devicetree@vger.kernel.org; linux-
> kernel@vger.kernel.org; kishon@ti.com; vkoul@kernel.org;
> andriy.shevchenko@linux.intel.com; linux-phy@lists.infradead.org
> Cc: mgross@linux.intel.com; kris.pan@linux.intel.com; Zhou, Furong
> <furong.zhou@intel.com>; Sangannavar, Mallikarjunappa
> <mallikarjunappa.sangannavar@intel.com>; Hunter, Adrian
> <adrian.hunter@intel.com>; Vaidya, Mahesh R
> <mahesh.r.vaidya@intel.com>; Srikandan, Nandhini
> <nandhini.srikandan@intel.com>; A, Rashmi <rashmi.a@intel.com>
> Subject: [RESEND PATCH v2 4/4] phy: intel: Add Thunder Bay eMMC PHY
> support
> 
> From: Rashmi A <rashmi.a@intel.com>
> 
> Add support of eMMC PHY for Intel Thunder Bay SoC, uses the Arasan eMMC
> phy
> 
> Signed-off-by: Rashmi A <rashmi.a@intel.com>
> Reviewed-by: Adrian Hunter <adrian.hunter@intel.com>
> ---
>  drivers/phy/intel/Kconfig                     |  10 +
>  drivers/phy/intel/Makefile                    |   1 +
>  drivers/phy/intel/phy-intel-thunderbay-emmc.c | 511 ++++++++++++++++++
>  3 files changed, 522 insertions(+)
>  create mode 100644 drivers/phy/intel/phy-intel-thunderbay-emmc.c
> 
> diff --git a/drivers/phy/intel/Kconfig b/drivers/phy/intel/Kconfig index
> ac42bb2fb394..18a3cc5b98c0 100644
> --- a/drivers/phy/intel/Kconfig
> +++ b/drivers/phy/intel/Kconfig
> @@ -46,3 +46,13 @@ config PHY_INTEL_LGM_EMMC
>  	select GENERIC_PHY
>  	help
>  	  Enable this to support the Intel EMMC PHY
> +
> +config PHY_INTEL_THUNDERBAY_EMMC
> +        tristate "Intel Thunder Bay eMMC PHY driver"
> +        depends on OF && (ARCH_THUNDERBAY || COMPILE_TEST)
> +        select GENERIC_PHY
> +        help
> +	  This option enables support for Intel Thunder Bay SoC eMMC PHY.
> +
> +	  To compile this driver as a module, choose M here: the module
> +	  will be called phy-intel-thunderbay-emmc.ko.
> diff --git a/drivers/phy/intel/Makefile b/drivers/phy/intel/Makefile index
> 14550981a707..b7321d56b0bb 100644
> --- a/drivers/phy/intel/Makefile
> +++ b/drivers/phy/intel/Makefile
> @@ -3,3 +3,4 @@ obj-$(CONFIG_PHY_INTEL_KEEMBAY_EMMC)	+=
> phy-intel-keembay-emmc.o
>  obj-$(CONFIG_PHY_INTEL_KEEMBAY_USB)	+= phy-intel-keembay-usb.o
>  obj-$(CONFIG_PHY_INTEL_LGM_COMBO)	+= phy-intel-lgm-combo.o
>  obj-$(CONFIG_PHY_INTEL_LGM_EMMC)	+= phy-intel-lgm-emmc.o
> +obj-$(CONFIG_PHY_INTEL_THUNDERBAY_EMMC) += phy-intel-thunderbay-
> emmc.o
> diff --git a/drivers/phy/intel/phy-intel-thunderbay-emmc.c
> b/drivers/phy/intel/phy-intel-thunderbay-emmc.c
> new file mode 100644
> index 000000000000..2d6ea84492f2
> --- /dev/null
> +++ b/drivers/phy/intel/phy-intel-thunderbay-emmc.c
> @@ -0,0 +1,511 @@
> +// SPDX-License-Identifier: GPL-2.0-only
> +/*
> + * Intel ThunderBay eMMC PHY driver
> + *
> + * Copyright (C) 2021 Intel Corporation
> + *
> + */
> +
> +#include <linux/clk.h>
> +#include <linux/delay.h>
> +#include <linux/io.h>
> +#include <linux/iopoll.h>
> +#include <linux/module.h>
> +#include <linux/of.h>
> +#include <linux/phy/phy.h>
> +#include <linux/platform_device.h>
> +
> +/* eMMC/SD/SDIO core/phy configuration registers */
> +#define CTRL_CFG_0	0x00
> +#define CTRL_CFG_1	0x04
> +#define CTRL_PRESET_0	0x08
> +#define CTRL_PRESET_1	0x0c
> +#define CTRL_PRESET_2	0x10
> +#define CTRL_PRESET_3	0x14
> +#define CTRL_PRESET_4	0x18
> +#define CTRL_CFG_2	0x1c
> +#define CTRL_CFG_3	0x20
> +#define PHY_CFG_0	0x24
> +#define PHY_CFG_1	0x28
> +#define PHY_CFG_2	0x2c
> +#define PHYBIST_CTRL	0x30
> +#define SDHC_STAT3	0x34
> +#define PHY_STAT	0x38
> +#define PHYBIST_STAT_0	0x3c
> +#define PHYBIST_STAT_1	0x40
> +#define EMMC_AXI        0x44
> +
> +/* CTRL_PRESET_3 */
> +#define CTRL_PRESET3_MASK	GENMASK(31, 0)
> +#define CTRL_PRESET3_SHIFT	0
> +
> +/* CTRL_CFG_0 bit fields */
> +#define SUPPORT_HS_MASK		BIT(26)
> +#define SUPPORT_HS_SHIFT	26
> +
> +#define SUPPORT_8B_MASK		BIT(24)
> +#define SUPPORT_8B_SHIFT	24
> +
> +/* CTRL_CFG_1 bit fields */
> +#define SUPPORT_SDR50_MASK	BIT(28)
> +#define SUPPORT_SDR50_SHIFT	28
> +#define SLOT_TYPE_MASK		GENMASK(27, 26)
> +#define SLOT_TYPE_OFFSET	26
> +#define SUPPORT_64B_MASK	BIT(24)
> +#define SUPPORT_64B_SHIFT	24
> +#define SUPPORT_HS400_MASK	BIT(2)
> +#define SUPPORT_HS400_SHIFT	2
> +#define SUPPORT_DDR50_MASK	BIT(1)
> +#define SUPPORT_DDR50_SHIFT	1
> +#define SUPPORT_SDR104_MASK	BIT(0)
> +#define SUPPORT_SDR104_SHIFT	0
> +
> +/* PHY_CFG_0 bit fields */
> +#define SEL_DLY_TXCLK_MASK      BIT(29)
> +#define SEL_DLY_TXCLK_SHIFT	29
> +#define SEL_DLY_RXCLK_MASK      BIT(28)
> +#define SEL_DLY_RXCLK_SHIFT	28
> +
> +#define OTAP_DLY_ENA_MASK	BIT(27)
> +#define OTAP_DLY_ENA_SHIFT	27
> +#define OTAP_DLY_SEL_MASK	GENMASK(26, 23)
> +#define OTAP_DLY_SEL_SHIFT	23
> +#define ITAP_CHG_WIN_MASK	BIT(22)
> +#define ITAP_CHG_WIN_SHIFT	22
> +#define ITAP_DLY_ENA_MASK	BIT(21)
> +#define ITAP_DLY_ENA_SHIFT	21
> +#define ITAP_DLY_SEL_MASK	GENMASK(20, 16)
> +#define ITAP_DLY_SEL_SHIFT	16
> +#define RET_ENB_MASK		BIT(15)
> +#define RET_ENB_SHIFT		15
> +#define RET_EN_MASK		BIT(14)
> +#define RET_EN_SHIFT		14
> +#define DLL_IFF_MASK		GENMASK(13, 11)
> +#define DLL_IFF_SHIFT		11
> +#define DLL_EN_MASK		BIT(10)
> +#define DLL_EN_SHIFT		10
> +#define DLL_TRIM_ICP_MASK	GENMASK(9, 6)
> +#define DLL_TRIM_ICP_SHIFT	6
> +#define RETRIM_EN_MASK		BIT(5)
> +#define RETRIM_EN_SHIFT		5
> +#define RETRIM_MASK		BIT(4)
> +#define RETRIM_SHIFT		4
> +#define DR_TY_MASK		GENMASK(3, 1)
> +#define DR_TY_SHIFT		1
> +#define PWR_DOWN_MASK		BIT(0)
> +#define PWR_DOWN_SHIFT		0
> +
> +/* PHY_CFG_1 bit fields */
> +#define REN_DAT_MASK		GENMASK(19, 12)
> +#define REN_DAT_SHIFT		12
> +#define REN_CMD_MASK		BIT(11)
> +#define REN_CMD_SHIFT		11
> +#define REN_STRB_MASK		BIT(10)
> +#define REN_STRB_SHIFT		10
> +#define PU_STRB_MASK		BIT(20)
> +#define PU_STRB_SHIFT		20
> +
> +/* PHY_CFG_2 bit fields */
> +#define CLKBUF_MASK		GENMASK(24, 21)
> +#define CLKBUF_SHIFT		21
> +#define SEL_STRB_MASK		GENMASK(20, 13)
> +#define SEL_STRB_SHIFT		13
> +#define SEL_FREQ_MASK		GENMASK(12, 10)
> +#define SEL_FREQ_SHIFT		10
> +
> +/* PHY_STAT bit fields */
> +#define CAL_DONE		BIT(6)
> +#define DLL_RDY			BIT(5)
> +
> +#define OTAP_DLY		0x0
> +#define ITAP_DLY		0x0
> +#define STRB			0x33
> +
> +/* From ACS_eMMC51_16nFFC_RO1100_Userguide_v1p0.pdf p17 */
> +#define FREQSEL_200M_170M	0x0
> +#define FREQSEL_170M_140M	0x1
> +#define FREQSEL_140M_110M	0x2
> +#define FREQSEL_110M_80M	0x3
> +#define FREQSEL_80M_50M		0x4
> +#define FREQSEL_275M_250M	0x5
> +#define FREQSEL_250M_225M	0x6
> +#define FREQSEL_225M_200M	0x7
> +
> +/* Phy power status */
> +#define PHY_UNINITIALIZED	0
> +#define PHY_INITIALIZED		1
> +
> +/*
> + * During init(400KHz) phy_settings will be called with 200MHZ clock
> + * To avoid incorrectly setting the phy for init(400KHZ) "phy_power_sts" is
> used.
> + * When actual clock is set always phy is powered off once and then
> powered on.
> + * (sdhci_arasan_set_clock). That feature will be used to identify
> +whether the
> + * settings are for init phy_power_on or actual clock phy_power_on
> + * 0 --> init settings
> + * 1 --> actual settings
> + */
> +
> +struct thunderbay_emmc_phy {
> +	void __iomem    *reg_base;
> +	struct clk      *emmcclk;
> +	int phy_power_sts;
> +};
> +
> +static inline void update_reg(struct thunderbay_emmc_phy *tbh_phy, u32
> offset,
> +			      u32 mask, u32 shift, u32 val)
> +{
> +	u32 tmp;
> +
> +	tmp = readl(tbh_phy->reg_base + offset);
> +	tmp &= ~mask;
> +	tmp |= val << shift;
> +	writel(tmp, tbh_phy->reg_base + offset); }
> +
> +static int thunderbay_emmc_phy_power(struct phy *phy, bool power_on) {
> +	struct thunderbay_emmc_phy *tbh_phy = phy_get_drvdata(phy);
> +	unsigned int freqsel = FREQSEL_200M_170M;
> +	unsigned long rate;
> +	static int lock;
> +	u32 val;
> +	int ret;
> +
> +	/* Disable DLL */
> +	rate = clk_get_rate(tbh_phy->emmcclk);
> +	switch (rate) {
> +	case 200000000:
> +		/* lock dll only when it is used, i.e only if
> SEL_DLY_TXCLK/RXCLK are 0 */
> +		update_reg(tbh_phy, PHY_CFG_0, DLL_EN_MASK,
> DLL_EN_SHIFT, 0x0);
> +		break;
> +
> +	/* dll lock not required for other frequencies */
> +	case 50000000 ... 52000000:
> +	case 400000:
> +	default:
> +		break;
> +	}
> +
> +	if (!power_on)
> +		return 0;
> +
> +	rate = clk_get_rate(tbh_phy->emmcclk);
> +	switch (rate) {
> +	case 170000001 ... 200000000:
> +		freqsel = FREQSEL_200M_170M;
> +		break;
> +
> +	case 140000001 ... 170000000:
> +		freqsel = FREQSEL_170M_140M;
> +		break;
> +
> +	case 110000001 ... 140000000:
> +		freqsel = FREQSEL_140M_110M;
> +		break;
> +
> +	case 80000001 ... 110000000:
> +		freqsel = FREQSEL_110M_80M;
> +		break;
> +
> +	case 50000000 ... 80000000:
> +		freqsel = FREQSEL_80M_50M;
> +		break;
> +
> +	case 250000001 ... 275000000:
> +		freqsel = FREQSEL_275M_250M;
> +		break;
> +
> +	case 225000001 ... 250000000:
> +		freqsel = FREQSEL_250M_225M;
> +		break;
> +
> +	case 200000001 ... 225000000:
> +		freqsel = FREQSEL_225M_200M;
> +		break;
> +	default:
> +		break;
> +	}
> +	/* Clock rate is checked against upper limit. It may fall low during init
> */
> +	if (rate > 200000000)
> +		dev_warn(&phy->dev, "Unsupported rate: %lu\n", rate);
> +
> +	udelay(5);
> +
> +	if (lock == 0) {
> +		/* PDB will be done only once per boot */
> +		update_reg(tbh_phy, PHY_CFG_0, PWR_DOWN_MASK,
> +			   PWR_DOWN_SHIFT, 0x1);
> +		lock = 1;
> +		/*
> +		 * According to the user manual, it asks driver to wait 5us for
> +		 * calpad busy trimming. However it is documented that this
> value is
> +		 * PVT(A.K.A. process, voltage and temperature) relevant, so
> some
> +		 * failure cases are found which indicates we should be more
> tolerant
> +		 * to calpad busy trimming.
> +		 */
> +		ret = readl_poll_timeout(tbh_phy->reg_base + PHY_STAT,
> +					 val, (val & CAL_DONE), 10, 50);
> +		if (ret) {
> +			dev_err(&phy->dev, "caldone failed, ret=%d\n", ret);
> +			return ret;
> +		}
> +	}
> +	rate = clk_get_rate(tbh_phy->emmcclk);
> +	switch (rate) {
> +	case 200000000:
> +		/* Set frequency of the DLL operation */
> +		update_reg(tbh_phy, PHY_CFG_2, SEL_FREQ_MASK,
> SEL_FREQ_SHIFT,
> +freqsel);
> +
> +		/* Enable DLL */
> +		update_reg(tbh_phy, PHY_CFG_0, DLL_EN_MASK,
> DLL_EN_SHIFT, 0x1);
> +
> +		/*
> +		 * After enabling analog DLL circuits docs say that we need
> 10.2 us if
> +		 * our source clock is at 50 MHz and that lock time scales
> linearly
> +		 * with clock speed. If we are powering on the PHY and the
> card clock
> +		 * is super slow (like 100kHz) this could take as long as 5.1 ms
> as
> +		 * per the math: 10.2 us * (50000000 Hz / 100000 Hz) => 5.1
> ms
> +		 * hopefully we won't be running at 100 kHz, but we should
> still make
> +		 * sure we wait long enough.
> +		 *
> +		 * NOTE: There appear to be corner cases where the DLL
> seems to take
> +		 * extra long to lock for reasons that aren't understood. In
> some
> +		 * extreme cases we've seen it take up to over 10ms (!). We'll
> be
> +		 * generous and give it 50ms.
> +		 */
> +		ret = readl_poll_timeout(tbh_phy->reg_base + PHY_STAT,
> +					 val, (val & DLL_RDY), 10, 50 *
> USEC_PER_MSEC);
> +		if (ret) {
> +			dev_err(&phy->dev, "dllrdy failed, ret=%d\n", ret);
> +			return ret;
> +		}
> +		break;
> +
> +	default:
> +		break;
> +	}
> +	return 0;
> +}
> +
> +static int thunderbay_emmc_phy_init(struct phy *phy) {
> +	struct thunderbay_emmc_phy *tbh_phy = phy_get_drvdata(phy);
> +
> +	tbh_phy->emmcclk = clk_get(&phy->dev, "emmcclk");
> +
> +	return PTR_ERR_OR_ZERO(tbh_phy->emmcclk);
> +}
> +
> +static int thunderbay_emmc_phy_exit(struct phy *phy) {
> +	struct thunderbay_emmc_phy *tbh_phy = phy_get_drvdata(phy);
> +
> +	clk_put(tbh_phy->emmcclk);
> +
> +	return 0;
> +}
> +
> +static int thunderbay_emmc_phy_power_on(struct phy *phy) {
> +	struct thunderbay_emmc_phy *tbh_phy = phy_get_drvdata(phy);
> +	unsigned long rate;
> +
> +	/* Overwrite capability bits configurable in bootloader */
> +	update_reg(tbh_phy, CTRL_CFG_0,
> +		   SUPPORT_HS_MASK, SUPPORT_HS_SHIFT, 0x1);
> +	update_reg(tbh_phy, CTRL_CFG_0,
> +		   SUPPORT_8B_MASK, SUPPORT_8B_SHIFT, 0x1);
> +	update_reg(tbh_phy, CTRL_CFG_1,
> +		   SUPPORT_SDR50_MASK, SUPPORT_SDR50_SHIFT, 0x1);
> +	update_reg(tbh_phy, CTRL_CFG_1,
> +		   SUPPORT_DDR50_MASK, SUPPORT_DDR50_SHIFT, 0x1);
> +	update_reg(tbh_phy, CTRL_CFG_1,
> +		   SUPPORT_SDR104_MASK, SUPPORT_SDR104_SHIFT, 0x1);
> +	update_reg(tbh_phy, CTRL_CFG_1,
> +		   SUPPORT_HS400_MASK, SUPPORT_HS400_SHIFT, 0x1);
> +	update_reg(tbh_phy, CTRL_CFG_1,
> +		   SUPPORT_64B_MASK, SUPPORT_64B_SHIFT, 0x1);
> +
> +	if (tbh_phy->phy_power_sts == PHY_UNINITIALIZED) {
> +		/* Indicates initialization, settings for init, same as 400KHZ
> setting */
> +		update_reg(tbh_phy, PHY_CFG_0, SEL_DLY_TXCLK_MASK,
> SEL_DLY_TXCLK_SHIFT, 0x1);
> +		update_reg(tbh_phy, PHY_CFG_0, SEL_DLY_RXCLK_MASK,
> SEL_DLY_RXCLK_SHIFT, 0x1);
> +		update_reg(tbh_phy, PHY_CFG_0, ITAP_DLY_ENA_MASK,
> ITAP_DLY_ENA_SHIFT, 0x0);
> +		update_reg(tbh_phy, PHY_CFG_0, ITAP_DLY_SEL_MASK,
> ITAP_DLY_SEL_SHIFT, 0x0);
> +		update_reg(tbh_phy, PHY_CFG_0, OTAP_DLY_ENA_MASK,
> OTAP_DLY_ENA_SHIFT, 0x0);
> +		update_reg(tbh_phy, PHY_CFG_0, OTAP_DLY_SEL_MASK,
> OTAP_DLY_SEL_SHIFT, 0);
> +		update_reg(tbh_phy, PHY_CFG_0, DLL_TRIM_ICP_MASK,
> DLL_TRIM_ICP_SHIFT, 0);
> +		update_reg(tbh_phy, PHY_CFG_0, DR_TY_MASK,
> DR_TY_SHIFT, 0x1);
> +
> +	} else if (tbh_phy->phy_power_sts == PHY_INITIALIZED) {
> +		/* Indicates actual clock setting */
> +		rate = clk_get_rate(tbh_phy->emmcclk);
> +		switch (rate) {
> +		case 200000000:
> +			update_reg(tbh_phy, PHY_CFG_0,
> SEL_DLY_TXCLK_MASK,
> +				   SEL_DLY_TXCLK_SHIFT, 0x0);
> +			update_reg(tbh_phy, PHY_CFG_0,
> SEL_DLY_RXCLK_MASK,
> +				   SEL_DLY_RXCLK_SHIFT, 0x0);
> +			update_reg(tbh_phy, PHY_CFG_0,
> ITAP_DLY_ENA_MASK,
> +				   ITAP_DLY_ENA_SHIFT, 0x0);
> +			update_reg(tbh_phy, PHY_CFG_0,
> ITAP_DLY_SEL_MASK,
> +				   ITAP_DLY_SEL_SHIFT, 0x0);
> +			update_reg(tbh_phy, PHY_CFG_0,
> OTAP_DLY_ENA_MASK,
> +				   OTAP_DLY_ENA_SHIFT, 0x1);
> +			update_reg(tbh_phy, PHY_CFG_0,
> OTAP_DLY_SEL_MASK,
> +				   OTAP_DLY_SEL_SHIFT, 2);
> +			update_reg(tbh_phy, PHY_CFG_0,
> DLL_TRIM_ICP_MASK,
> +				   DLL_TRIM_ICP_SHIFT, 0x8);
> +			update_reg(tbh_phy, PHY_CFG_0, DR_TY_MASK,
> +				   DR_TY_SHIFT, 0x1);
> +			/* For HS400 only */
> +			update_reg(tbh_phy, PHY_CFG_2, SEL_STRB_MASK,
> +				   SEL_STRB_SHIFT, STRB);
> +			break;
> +
> +		case 50000000 ... 52000000:
> +			/* For both HS and DDR52 this setting works */
> +			update_reg(tbh_phy, PHY_CFG_0,
> SEL_DLY_TXCLK_MASK,
> +				   SEL_DLY_TXCLK_SHIFT, 0x1);
> +			update_reg(tbh_phy, PHY_CFG_0,
> SEL_DLY_RXCLK_MASK,
> +				   SEL_DLY_RXCLK_SHIFT, 0x1);
> +			update_reg(tbh_phy, PHY_CFG_0,
> ITAP_DLY_ENA_MASK,
> +				   ITAP_DLY_ENA_SHIFT, 0x0);
> +			update_reg(tbh_phy, PHY_CFG_0,
> ITAP_DLY_SEL_MASK,
> +				   ITAP_DLY_SEL_SHIFT, 0x0);
> +			update_reg(tbh_phy, PHY_CFG_0,
> OTAP_DLY_ENA_MASK,
> +				   OTAP_DLY_ENA_SHIFT, 0x1);
> +			update_reg(tbh_phy, PHY_CFG_0,
> OTAP_DLY_SEL_MASK,
> +				   OTAP_DLY_SEL_SHIFT, 4);
> +			update_reg(tbh_phy, PHY_CFG_0,
> DLL_TRIM_ICP_MASK,
> +				   DLL_TRIM_ICP_SHIFT, 0x8);
> +			update_reg(tbh_phy, PHY_CFG_0,
> +				   DR_TY_MASK, DR_TY_SHIFT, 0x1);
> +			break;
> +
> +		case 400000:
> +			update_reg(tbh_phy, PHY_CFG_0,
> SEL_DLY_TXCLK_MASK,
> +				   SEL_DLY_TXCLK_SHIFT, 0x1);
> +			update_reg(tbh_phy, PHY_CFG_0,
> SEL_DLY_RXCLK_MASK,
> +				   SEL_DLY_RXCLK_SHIFT, 0x1);
> +			update_reg(tbh_phy, PHY_CFG_0,
> ITAP_DLY_ENA_MASK,
> +				   ITAP_DLY_ENA_SHIFT, 0x0);
> +			update_reg(tbh_phy, PHY_CFG_0,
> ITAP_DLY_SEL_MASK,
> +				   ITAP_DLY_SEL_SHIFT, 0x0);
> +			update_reg(tbh_phy, PHY_CFG_0,
> OTAP_DLY_ENA_MASK,
> +				   OTAP_DLY_ENA_SHIFT, 0x0);
> +			update_reg(tbh_phy, PHY_CFG_0,
> OTAP_DLY_SEL_MASK,
> +				   OTAP_DLY_SEL_SHIFT, 0);
> +			update_reg(tbh_phy, PHY_CFG_0,
> DLL_TRIM_ICP_MASK,
> +				   DLL_TRIM_ICP_SHIFT, 0);
> +			update_reg(tbh_phy, PHY_CFG_0, DR_TY_MASK,
> DR_TY_SHIFT, 0x1);
> +			break;
> +
> +		default:
> +			update_reg(tbh_phy, PHY_CFG_0,
> SEL_DLY_TXCLK_MASK,
> +				   SEL_DLY_TXCLK_SHIFT, 0x1);
> +			update_reg(tbh_phy, PHY_CFG_0,
> SEL_DLY_RXCLK_MASK,
> +				   SEL_DLY_RXCLK_SHIFT, 0x1);
> +			update_reg(tbh_phy, PHY_CFG_0,
> ITAP_DLY_ENA_MASK,
> +				   ITAP_DLY_ENA_SHIFT, 0x0);
> +			update_reg(tbh_phy, PHY_CFG_0,
> ITAP_DLY_SEL_MASK,
> +				   ITAP_DLY_SEL_SHIFT, 0x0);
> +			update_reg(tbh_phy, PHY_CFG_0,
> OTAP_DLY_ENA_MASK,
> +				   OTAP_DLY_ENA_SHIFT, 0x1);
> +			update_reg(tbh_phy, PHY_CFG_0,
> OTAP_DLY_SEL_MASK,
> +				   OTAP_DLY_SEL_SHIFT, 2);
> +			update_reg(tbh_phy, PHY_CFG_0,
> DLL_TRIM_ICP_MASK,
> +				   DLL_TRIM_ICP_SHIFT, 0x8);
> +			update_reg(tbh_phy, PHY_CFG_0, DR_TY_MASK,
> +				   DR_TY_SHIFT, 0x1);
> +			break;
> +		}
> +		/* Reset, init seq called without phy_power_off, this
> indicates init seq */
> +		tbh_phy->phy_power_sts = PHY_UNINITIALIZED;
> +	}
> +
> +	update_reg(tbh_phy, PHY_CFG_0, RETRIM_EN_MASK,
> RETRIM_EN_SHIFT, 0x1);
> +	update_reg(tbh_phy, PHY_CFG_0, RETRIM_MASK, RETRIM_SHIFT,
> 0x0);
> +
> +	return thunderbay_emmc_phy_power(phy, 1); }
> +
> +static int thunderbay_emmc_phy_power_off(struct phy *phy) {
> +	struct thunderbay_emmc_phy *tbh_phy = phy_get_drvdata(phy);
> +
> +	tbh_phy->phy_power_sts = PHY_INITIALIZED;
> +
> +	return thunderbay_emmc_phy_power(phy, 0); }
> +
> +static const struct phy_ops thunderbay_emmc_phy_ops = {
> +	.init		= thunderbay_emmc_phy_init,
> +	.exit		= thunderbay_emmc_phy_exit,
> +	.power_on	= thunderbay_emmc_phy_power_on,
> +	.power_off	= thunderbay_emmc_phy_power_off,
> +	.owner		= THIS_MODULE,
> +};
> +
> +static const struct of_device_id thunderbay_emmc_phy_of_match[] = {
> +	{ .compatible = "intel,thunderbay-emmc-phy",
> +		(void *)&thunderbay_emmc_phy_ops },
> +	{}
> +};
> +MODULE_DEVICE_TABLE(of, thunderbay_emmc_phy_of_match);
> +
> +static int thunderbay_emmc_phy_probe(struct platform_device *pdev) {
> +	struct thunderbay_emmc_phy *tbh_phy;
> +	struct phy_provider *phy_provider;
> +	struct device *dev = &pdev->dev;
> +	const struct of_device_id *id;
> +	struct phy *generic_phy;
> +	struct resource *res;
> +
> +	if (!dev->of_node)
> +		return -ENODEV;
> +
> +	tbh_phy = devm_kzalloc(dev, sizeof(*tbh_phy), GFP_KERNEL);
> +	if (!tbh_phy)
> +		return -ENOMEM;
> +
> +	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> +	tbh_phy->reg_base = devm_ioremap_resource(&pdev->dev, res);
> +	if (IS_ERR(tbh_phy->reg_base)) {
> +		dev_err(&pdev->dev, "region map failed\n");
> +		return PTR_ERR(tbh_phy->reg_base);
> +	}
> +
> +	tbh_phy->phy_power_sts = PHY_UNINITIALIZED;
> +	id = of_match_node(thunderbay_emmc_phy_of_match, pdev-
> >dev.of_node);
> +	if (!id) {
> +		dev_err(dev, "failed to get match_node\n");
> +		return -EINVAL;
> +	}
> +
> +	generic_phy = devm_phy_create(dev, dev->of_node, id->data);
> +	if (IS_ERR(generic_phy)) {
> +		dev_err(dev, "failed to create PHY\n");
> +		return PTR_ERR(generic_phy);
> +	}
> +
> +	phy_set_drvdata(generic_phy, tbh_phy);
> +	phy_provider = devm_of_phy_provider_register(dev,
> +of_phy_simple_xlate);
> +
> +	return PTR_ERR_OR_ZERO(phy_provider);
> +}
> +
> +static struct platform_driver thunderbay_emmc_phy_driver = {
> +	.probe		 = thunderbay_emmc_phy_probe,
> +	.driver		 = {
> +		.name	 = "thunderbay-emmc-phy",
> +		.of_match_table = thunderbay_emmc_phy_of_match,
> +	},
> +};
> +module_platform_driver(thunderbay_emmc_phy_driver);
> +
> +MODULE_AUTHOR("Nandhini S <nandhini.srikandan@intel.com>");
> +MODULE_AUTHOR("Rashmi A <rashmi.a@intel.com>");
> +MODULE_DESCRIPTION("Intel Thunder Bay eMMC PHY driver");
> +MODULE_LICENSE("GPL v2");
> --
> 2.17.1



Thank you Rob for the review of emmc dt-bindings.

Hi Vinod/Kishon,

Please let me know if there are any comments.
Looking forward for your acknowledgement for the patch, phy: intel: Add Thunder Bay eMMC PHY support

-Rashmi

Re: [RESEND PATCH v2 4/4] phy: intel: Add Thunder Bay eMMC PHY support

[andriy.shevchenko]

On Wed, Nov 17, 2021 at 06:38:59AM +0000, A, Rashmi wrote:
> > -----Original Message-----
> > From: A, Rashmi <rashmi.a@intel.com>
> > Sent: Wednesday, October 27, 2021 5:25 PM

> Thank you Rob for the review of emmc dt-bindings.
> 
> Hi Vinod/Kishon,
> 
> Please let me know if there are any comments.
> Looking forward for your acknowledgement for the patch, phy: intel: Add Thunder Bay eMMC PHY support

Please, learn how not to put 450 unrelated lines in your responce(s) via email.
(Yes, I know that one may try to configure folding, but by default not many
 MUAs support this)

-- 
With Best Regards,
Andy Shevchenko

Re: [RESEND PATCH v2 4/4] phy: intel: Add Thunder Bay eMMC PHY support

[Vinod Koul]

On 27-10-21, 17:25, rashmi.a@intel.com wrote:
> From: Rashmi A <rashmi.a@intel.com>
> 
> Add support of eMMC PHY for Intel Thunder Bay SoC,
> uses the Arasan eMMC phy

Applied, thanks

-- 
~Vinod

Re: [RESEND PATCH v2 0/4] Add support of eMMC PHY for Intel Thunder

[Ulf Hansson]

On Wed, 27 Oct 2021 at 13:55, <rashmi.a@intel.com> wrote:
>
> From: Rashmi A <rashmi.a@intel.com>
>
> This patch set enables the support for eMMC PHY on the Intel Thunder
> Bay SoC. eMMC PHY is based on arasan phy.
>
> Patch 1 Adds arasan sdhci support for eMMC in Intel Thunder Bay.
> Patch 2 Adds arasan sdhci dt bindings.
> Patch 3 Holds the device tree binding documentation for eMMC PHY
>         and listings of new files in MAINTAINERS file.
> Patch 4 Holds the eMMC PHY driver.
>
> Reseding V2 patchset to get the dt-binding patches reviewed.

I have already queued patch1 and patch2, so there is no need to resend
them anymore.

Kind regards
Uffe

>
> Changes from v1:
> Add arasan sdhci dt bindings
>
> Rashmi A (4):
>   mmc: sdhci-of-arasan: Add intel Thunder Bay SOC support to the arasan
>     eMMC driver
>   dt-bindings: mmc: Add bindings for Intel Thunder Bay SoC
>   dt-bindings: phy: intel: Add Thunder Bay eMMC PHY bindings
>   phy: intel: Add Thunder Bay eMMC PHY support
>
>  .../devicetree/bindings/mmc/arasan,sdhci.yaml |  25 +
>  .../phy/intel,phy-thunderbay-emmc.yaml        |  46 ++
>  MAINTAINERS                                   |   7 +
>  drivers/mmc/host/sdhci-of-arasan.c            |  29 +-
>  drivers/phy/intel/Kconfig                     |  10 +
>  drivers/phy/intel/Makefile                    |   1 +
>  drivers/phy/intel/phy-intel-thunderbay-emmc.c | 511 ++++++++++++++++++
>  7 files changed, 628 insertions(+), 1 deletion(-)
>  create mode 100644 Documentation/devicetree/bindings/phy/intel,phy-thunderbay-emmc.yaml
>  create mode 100644 drivers/phy/intel/phy-intel-thunderbay-emmc.c
>
> --
> 2.17.1
>