summaryrefslogtreecommitdiff
path: root/drivers/phy/freescale
diff options
context:
space:
mode:
authorLi Jun <jun.li@nxp.com>2020-08-24 21:33:34 +0800
committerVinod Koul <vkoul@kernel.org>2020-08-31 14:34:37 +0530
commit4708ee37826eaa31125ced4a1a573fcc6aa42ab3 (patch)
tree5379819dbccdfbf15861e28f87f8881831561def /drivers/phy/freescale
parente8bd1cd92296ad975e98e0191ff9c33f9d055fe9 (diff)
downloadlwn-4708ee37826eaa31125ced4a1a573fcc6aa42ab3.tar.gz
lwn-4708ee37826eaa31125ced4a1a573fcc6aa42ab3.zip
phy: freescale: imx8mq-usb: add support for imx8mp usb phy
Add initial support for imx8mp usb phy support, imx8mp usb has a silimar phy as imx8mq, which has some different customizations on clock and low power design when SoC integration. Signed-off-by: Li Jun <jun.li@nxp.com> Link: https://lore.kernel.org/r/1598276014-2377-2-git-send-email-jun.li@nxp.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers/phy/freescale')
-rw-r--r--drivers/phy/freescale/phy-fsl-imx8mq-usb.c77
1 files changed, 70 insertions, 7 deletions
diff --git a/drivers/phy/freescale/phy-fsl-imx8mq-usb.c b/drivers/phy/freescale/phy-fsl-imx8mq-usb.c
index 0c4833da7be0..d40be7ad1ace 100644
--- a/drivers/phy/freescale/phy-fsl-imx8mq-usb.c
+++ b/drivers/phy/freescale/phy-fsl-imx8mq-usb.c
@@ -1,15 +1,20 @@
// SPDX-License-Identifier: GPL-2.0+
/* Copyright (c) 2017 NXP. */
+#include <linux/bitfield.h>
#include <linux/clk.h>
+#include <linux/delay.h>
#include <linux/io.h>
#include <linux/module.h>
+#include <linux/of_platform.h>
#include <linux/phy/phy.h>
#include <linux/platform_device.h>
#include <linux/regulator/consumer.h>
#define PHY_CTRL0 0x0
#define PHY_CTRL0_REF_SSP_EN BIT(2)
+#define PHY_CTRL0_FSEL_MASK GENMASK(10, 5)
+#define PHY_CTRL0_FSEL_24M 0x2a
#define PHY_CTRL1 0x4
#define PHY_CTRL1_RESET BIT(0)
@@ -20,6 +25,11 @@
#define PHY_CTRL2 0x8
#define PHY_CTRL2_TXENABLEN0 BIT(8)
+#define PHY_CTRL2_OTG_DISABLE BIT(9)
+
+#define PHY_CTRL6 0x18
+#define PHY_CTRL6_ALT_CLK_EN BIT(1)
+#define PHY_CTRL6_ALT_CLK_SEL BIT(0)
struct imx8mq_usb_phy {
struct phy *phy;
@@ -54,6 +64,44 @@ static int imx8mq_usb_phy_init(struct phy *phy)
return 0;
}
+static int imx8mp_usb_phy_init(struct phy *phy)
+{
+ struct imx8mq_usb_phy *imx_phy = phy_get_drvdata(phy);
+ u32 value;
+
+ /* USB3.0 PHY signal fsel for 24M ref */
+ value = readl(imx_phy->base + PHY_CTRL0);
+ value &= ~PHY_CTRL0_FSEL_MASK;
+ value |= FIELD_PREP(PHY_CTRL0_FSEL_MASK, PHY_CTRL0_FSEL_24M);
+ writel(value, imx_phy->base + PHY_CTRL0);
+
+ /* Disable alt_clk_en and use internal MPLL clocks */
+ value = readl(imx_phy->base + PHY_CTRL6);
+ value &= ~(PHY_CTRL6_ALT_CLK_SEL | PHY_CTRL6_ALT_CLK_EN);
+ writel(value, imx_phy->base + PHY_CTRL6);
+
+ value = readl(imx_phy->base + PHY_CTRL1);
+ value &= ~(PHY_CTRL1_VDATSRCENB0 | PHY_CTRL1_VDATDETENB0);
+ value |= PHY_CTRL1_RESET | PHY_CTRL1_ATERESET;
+ writel(value, imx_phy->base + PHY_CTRL1);
+
+ value = readl(imx_phy->base + PHY_CTRL0);
+ value |= PHY_CTRL0_REF_SSP_EN;
+ writel(value, imx_phy->base + PHY_CTRL0);
+
+ value = readl(imx_phy->base + PHY_CTRL2);
+ value |= PHY_CTRL2_TXENABLEN0 | PHY_CTRL2_OTG_DISABLE;
+ writel(value, imx_phy->base + PHY_CTRL2);
+
+ udelay(10);
+
+ value = readl(imx_phy->base + PHY_CTRL1);
+ value &= ~(PHY_CTRL1_RESET | PHY_CTRL1_ATERESET);
+ writel(value, imx_phy->base + PHY_CTRL1);
+
+ return 0;
+}
+
static int imx8mq_phy_power_on(struct phy *phy)
{
struct imx8mq_usb_phy *imx_phy = phy_get_drvdata(phy);
@@ -83,12 +131,29 @@ static struct phy_ops imx8mq_usb_phy_ops = {
.owner = THIS_MODULE,
};
+static struct phy_ops imx8mp_usb_phy_ops = {
+ .init = imx8mp_usb_phy_init,
+ .power_on = imx8mq_phy_power_on,
+ .power_off = imx8mq_phy_power_off,
+ .owner = THIS_MODULE,
+};
+
+static const struct of_device_id imx8mq_usb_phy_of_match[] = {
+ {.compatible = "fsl,imx8mq-usb-phy",
+ .data = &imx8mq_usb_phy_ops,},
+ {.compatible = "fsl,imx8mp-usb-phy",
+ .data = &imx8mp_usb_phy_ops,},
+ { }
+};
+MODULE_DEVICE_TABLE(of, imx8mq_usb_phy_of_match);
+
static int imx8mq_usb_phy_probe(struct platform_device *pdev)
{
struct phy_provider *phy_provider;
struct device *dev = &pdev->dev;
struct imx8mq_usb_phy *imx_phy;
struct resource *res;
+ const struct phy_ops *phy_ops;
imx_phy = devm_kzalloc(dev, sizeof(*imx_phy), GFP_KERNEL);
if (!imx_phy)
@@ -105,7 +170,11 @@ static int imx8mq_usb_phy_probe(struct platform_device *pdev)
if (IS_ERR(imx_phy->base))
return PTR_ERR(imx_phy->base);
- imx_phy->phy = devm_phy_create(dev, NULL, &imx8mq_usb_phy_ops);
+ phy_ops = of_device_get_match_data(dev);
+ if (!phy_ops)
+ return -EINVAL;
+
+ imx_phy->phy = devm_phy_create(dev, NULL, phy_ops);
if (IS_ERR(imx_phy->phy))
return PTR_ERR(imx_phy->phy);
@@ -120,12 +189,6 @@ static int imx8mq_usb_phy_probe(struct platform_device *pdev)
return PTR_ERR_OR_ZERO(phy_provider);
}
-static const struct of_device_id imx8mq_usb_phy_of_match[] = {
- {.compatible = "fsl,imx8mq-usb-phy",},
- { },
-};
-MODULE_DEVICE_TABLE(of, imx8mq_usb_phy_of_match);
-
static struct platform_driver imx8mq_usb_phy_driver = {
.probe = imx8mq_usb_phy_probe,
.driver = {