[PATCH 4/4] phy: miphy365x: Provide support for the MiPHY356x Generic PHY
Kishon Vijay Abraham I
kishon at ti.com
Thu Feb 13 01:53:41 EST 2014
Hi,
On Wednesday 12 February 2014 09:33 PM, Lee Jones wrote:
> The MiPHY365x is a Generic PHY which can serve various SATA or PCIe
> devices. It has 2 ports which it can use for either; both SATA, both
various SATA or PCIe devices in STMicroelectronics STiH41x SoC series?
> PCIe or one of each in any configuration.
>
> Cc: Kishon Vijay Abraham I <kishon at ti.com>
> Signed-off-by: Lee Jones <lee.jones at linaro.org>
> ---
> drivers/phy/Kconfig | 8 +
> drivers/phy/Makefile | 1 +
> drivers/phy/phy-miphy365x.c | 634 ++++++++++++++++++++++++++++++++++++++++++++
> 3 files changed, 643 insertions(+)
> create mode 100644 drivers/phy/phy-miphy365x.c
>
> diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig
> index 330ef2d..bb2706a 100644
> --- a/drivers/phy/Kconfig
> +++ b/drivers/phy/Kconfig
> @@ -21,6 +21,14 @@ config PHY_EXYNOS_MIPI_VIDEO
> Support for MIPI CSI-2 and MIPI DSI DPHY found on Samsung S5P
> and EXYNOS SoCs.
>
> +config PHY_MIPHY365X
> + tristate "STMicroelectronics MIPHY365X PHY driver for STiH41x series"
> + depends on ARCH_STI
> + depends on GENERIC_PHY
depends on CONFIG_OF and HAS_IOMEM?
> + help
> + Enable this to support the miphy transceiver (for SATA/PCIE)
> + that is part of STMicroelectronics STiH41x SoC series.
> +
> config OMAP_USB2
> tristate "OMAP USB2 PHY Driver"
> depends on ARCH_OMAP2PLUS
> diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile
> index d0caae9..5879639 100644
> --- a/drivers/phy/Makefile
> +++ b/drivers/phy/Makefile
> @@ -5,5 +5,6 @@
> obj-$(CONFIG_GENERIC_PHY) += phy-core.o
> obj-$(CONFIG_PHY_EXYNOS_DP_VIDEO) += phy-exynos-dp-video.o
> obj-$(CONFIG_PHY_EXYNOS_MIPI_VIDEO) += phy-exynos-mipi-video.o
> +obj-$(CONFIG_PHY_MIPHY365X) += phy-miphy365x.o
> obj-$(CONFIG_OMAP_USB2) += phy-omap-usb2.o
> obj-$(CONFIG_TWL4030_USB) += phy-twl4030-usb.o
> diff --git a/drivers/phy/phy-miphy365x.c b/drivers/phy/phy-miphy365x.c
> new file mode 100644
> index 0000000..c4124e3
> --- /dev/null
> +++ b/drivers/phy/phy-miphy365x.c
> @@ -0,0 +1,634 @@
> +/*
> + * Copyright (C) 2014 STMicroelectronics
> + *
> + * STMicroelectronics PHY driver MiPHY365 (for SoC STiH416).
> + *
> + * Author: Alexandre Torgue <alexandre.torgue at st.com>
The author of this patch is not Alexandre Torgue?
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2, as
> + * published by the Free Software Foundation.
> + *
> + */
> +
> +#include <linux/platform_device.h>
> +#include <linux/io.h>
> +#include <linux/kernel.h>
> +#include <linux/module.h>
> +#include <linux/of.h>
> +#include <linux/of_platform.h>
> +#include <linux/clk.h>
> +#include <linux/phy/phy.h>
> +#include <linux/delay.h>
> +#include <linux/mfd/syscon.h>
> +#include <linux/regmap.h>
> +
> +#include <dt-bindings/phy/phy-miphy365x.h>
> +
> +#define HFC_TIMEOUT 50
> +
> +#define SYSCFG_2521 0x824
> +#define SYSCFG_2522 0x828
> +#define SYSCFG_PCIE_SATA_MASK BIT(1)
> +#define SYSCFG_PCIE_SATA_POS 1
> +
> +/* MiPHY365x register definitiona */
> +#define RESET_REG 0x00
> +#define RST_PLL BIT(1)
There are quite a few alignment problems with these macros. It needs to be fixed.
> +#define RST_PLL_CAL BIT(2)
> +#define RST_RX BIT(4)
> +#define RST_MACRO BIT(7)
> +
> +#define STATUS_REG 0x01
> +#define IDLL_RDY BIT(0)
> +#define PLL_RDY BIT(1)
> +#define DES_BIT_LOCK BIT(2)
> +#define DES_SYMBOL_LOCK BIT(3)
> +
> +#define CTRL_REG 0x02
> +#define TERM_EN BIT(0)
> +#define PCI_EN BIT(2)
> +#define DES_BIT_LOCK_EN BIT(3)
> +#define TX_POL BIT(5)
> +
> +#define INT_CTRL_REG 0x03
> +
> +#define BOUNDARY1_REG 0x10
> +#define SPDSEL_SEL BIT(0)
> +
> +#define BOUNDARY3_REG 0x12
> +#define TX_SPDSEL_GEN1_VAL 0
> +#define TX_SPDSEL_GEN2_VAL 0x01
> +#define TX_SPDSEL_GEN3_VAL 0x02
> +#define RX_SPDSEL_GEN1_VAL 0
> +#define RX_SPDSEL_GEN2_VAL (0x01 << 3)
> +#define RX_SPDSEL_GEN3_VAL (0x02 << 3)
> +
> +#define PCIE_REG 0x16
> +
> +#define BUF_SEL_REG 0x20
> +#define CONF_GEN_SEL_GEN3 0x02
> +#define CONF_GEN_SEL_GEN2 0x01
> +#define PD_VDDTFILTER BIT(4)
> +
> +#define TXBUF1_REG 0x21
> +#define SWING_VAL 0x04
> +#define SWING_VAL_GEN1 0x03
> +#define PREEMPH_VAL (0x3 << 5)
> +
> +#define TXBUF2_REG 0x22
> +#define TXSLEW_VAL 0x2
> +#define TXSLEW_VAL_GEN1 0x4
> +
> +#define RXBUF_OFFSET_CTRL_REG 0x23
> +
> +#define RXBUF_REG 0x25
> +#define SDTHRES_VAL 0x01
> +#define EQ_ON3 (0x03 << 4)
> +#define EQ_ON1 (0x01 << 4)
> +
> +#define COMP_CTRL1_REG 0x40
> +#define START_COMSR BIT(0)
> +#define START_COMZC BIT(1)
> +#define COMP_AUTO_LOAD BIT(4)
> +
> +#define COMP_CTRL2_REG 0x41
> +#define COMP_2MHZ_RAT_GEN1 0x1e
> +#define COMP_2MHZ_RAT 0xf
> +
> +#define COMP_CTRL3_REG 0x42
> +#define COMSR_COMP_REF 0x33
> +
> +#define COMP_IDLL_REG 0x47
> +#define COMZC_IDLL 0x2a
> +
> +#define PLL_CTRL1_REG 0x50
> +#define PLL_START_CAL BIT(0)
> +#define BUF_EN BIT(2)
> +#define SYNCHRO_TX BIT(3)
> +#define SSC_EN BIT(6)
> +#define CONFIG_PLL BIT(7)
> +
> +#define PLL_CTRL2_REG 0x51
> +#define BYPASS_PLL_CAL BIT(1)
> +
> +#define PLL_RAT_REG 0x52
> +
> +#define PLL_SSC_STEP_MSB_REG 0x56
> +#define PLL_SSC_STEP_MSB_VAL 0x03
> +
> +#define PLL_SSC_STEP_LSB_REG 0x57
> +#define PLL_SSC_STEP_LSB_VAL 0x63
> +
> +#define PLL_SSC_PER_MSB_REG 0x58
> +#define PLL_SSC_PER_MSB_VAL 0
> +
> +#define PLL_SSC_PER_LSB_REG 0x59
> +#define PLL_SSC_PER_LSB_VAL 0xf1
> +
> +#define IDLL_TEST_REG 0x72
> +#define START_CLK_HF BIT(6)
> +
> +#define DES_BITLOCK_REG 0x86
> +#define BIT_LOCK_LEVEL 0x01
> +#define BIT_LOCK_CNT_512 (0x03 << 5)
> +
> +static u8 ports[] = { MIPHY_PORT_0, MIPHY_PORT_1 };
> +
> +struct miphy365x_phy {
> + struct phy *phy;
> + void __iomem *base;
> + void __iomem *sata;
> + void __iomem *pcie;
> + u8 type;
> + u8 port;
> +};
> +
> +struct miphy365x_dev {
> + struct device *dev;
> + struct mutex miphy_mutex;
> + struct miphy365x_phy phys[ARRAY_SIZE(ports)];
> + bool pcie_tx_pol_inv;
> + bool sata_tx_pol_inv;
> + u32 sata_gen;
> + struct regmap *regmap;
> +};
> +
> +enum miphy_sata_gen {
> + SATA_GEN1,
> + SATA_GEN2,
> + SATA_GEN3
> +};
> +
> +static u8 rx_tx_spd[] = {
> + TX_SPDSEL_GEN1_VAL | RX_SPDSEL_GEN1_VAL,
> + TX_SPDSEL_GEN2_VAL | RX_SPDSEL_GEN2_VAL,
> + TX_SPDSEL_GEN3_VAL | RX_SPDSEL_GEN3_VAL
> +};
> +
> +#define miphy365x_phy_to_dev(inst) \
> + container_of((inst), struct miphy365x_dev, phys[(inst)->port]);
> +
> +/*
> + * This function selects the system configuration,
> + * either two SATA, one SATA and one PCIe, or two PCIe lanes.
> + */
> +static int miphy365x_set_path(struct miphy365x_phy *miphy_phy,
> + struct miphy365x_dev *miphy_dev)
> +{
> + u8 config = miphy_phy->type | miphy_phy->port;
> + u32 mask = SYSCFG_PCIE_SATA_MASK;
> + u32 reg;
> + bool sata;
> +
> + switch (config) {
> + case MIPHY_SATA_PORT0:
> + reg = SYSCFG_2521;
> + sata = true;
How do we configure PORT1 for SATA here? Do we really support all the system
configuration?
> + break;
> + case MIPHY_PCIE_PORT1:
> + reg = SYSCFG_2522;
> + sata = false;
> + break;
> + default:
> + dev_err(miphy_dev->dev, "Configuration not supported\n");
> + return -EINVAL;
> + }
> +
> + return regmap_update_bits(miphy_dev->regmap, reg, mask,
> + sata << SYSCFG_PCIE_SATA_POS);
> +}
> +
> +static void miphy365x_phy_init_pcie_port(struct miphy365x_phy *miphy_phy,
> + struct miphy365x_dev *miphy_dev)
> +{
> + u8 val;
> +
> + if (!miphy_dev->pcie_tx_pol_inv)
> + return;
> +
> + /* Invert Tx polarity and clear pci_txdetect_pol bit */
> + val = TERM_EN | PCI_EN | DES_BIT_LOCK_EN | TX_POL;
> + writeb_relaxed(val, miphy_phy->base + CTRL_REG);
> + writeb_relaxed(0x00, miphy_phy->base + PCIE_REG);
> +}
> +
> +static inline int miphy365x_phy_hfc_not_rdy(struct miphy365x_phy *miphy_phy,
> + struct miphy365x_dev *miphy_dev)
> +{
> + int timeout = HFC_TIMEOUT;
> + u8 mask = IDLL_RDY | PLL_RDY;
> + u8 regval;
> +
> + do {
> + regval = readb_relaxed(miphy_phy->base + STATUS_REG);
> + usleep_range(2000, 2500);
Any comment on how this delay value is obtained?
> + } while (timeout-- && (regval & mask));
> +
> + if (timeout < 0) {
> + dev_err(miphy_dev->dev, "HFC ready timeout!\n");
> + return -EBUSY;
> + }
> +
> + return 0;
> +}
> +
> +static inline int miphy365x_phy_rdy(struct miphy365x_phy *miphy_phy,
> + struct miphy365x_dev *miphy_dev)
> +{
> + int timeout = HFC_TIMEOUT;
> + u8 mask = mask = IDLL_RDY | PLL_RDY;
just u8 mask = IDLL_RDY | PLL_RDY; would suffice.
> + u8 regval;
> +
> + do {
> + regval = readb_relaxed(miphy_phy->base + STATUS_REG);
> + usleep_range(2000, 2500);
same here.
> + } while (timeout-- && ((regval & mask) != mask));
> +
> + if (timeout < 0) {
> + dev_err(miphy_dev->dev, "PHY not ready timeout!\n");
> + return -EBUSY;
> + }
> +
> + return 0;
> +}
> +
> +static inline void miphy365x_phy_set_comp(struct miphy365x_phy *miphy_phy,
> + struct miphy365x_dev *miphy_dev)
> +{
> + u8 val, mask;
> +
> + if (miphy_dev->sata_gen == SATA_GEN1)
> + writeb_relaxed(COMP_2MHZ_RAT_GEN1,
> + miphy_phy->base + COMP_CTRL2_REG);
> + else
> + writeb_relaxed(COMP_2MHZ_RAT,
> + miphy_phy->base + COMP_CTRL2_REG);
> +
> + if (miphy_dev->sata_gen != SATA_GEN3) {
> + writeb_relaxed(COMSR_COMP_REF,
> + miphy_phy->base + COMP_CTRL3_REG);
> + /*
> + * Force VCO current to value defined by address 0x5A
> + * and disable PCIe100Mref bit
> + * Enable auto load compensation for pll_i_bias
> + */
> + writeb_relaxed(BYPASS_PLL_CAL, miphy_phy->base + PLL_CTRL2_REG);
> + writeb_relaxed(COMZC_IDLL, miphy_phy->base + COMP_IDLL_REG);
> + }
> +
> + /*
> + * Force restart compensation and enable auto load
> + * for Comzc_Tx, Comzc_Rx and Comsr on macro
> + */
> + val = START_COMSR | START_COMZC | COMP_AUTO_LOAD;
> + writeb_relaxed(val, miphy_phy->base + COMP_CTRL1_REG);
> +
> + mask = DES_BIT_LOCK | DES_SYMBOL_LOCK;
> + while ((readb_relaxed(miphy_phy->base + COMP_CTRL1_REG) & mask) != mask)
> + cpu_relax();
Don't we need to break from here at some point if the LOCK's are never set?
> +}
> +
> +static inline void miphy365x_phy_set_ssc(struct miphy365x_phy *miphy_phy,
> + struct miphy365x_dev *miphy_dev)
> +{
> + u8 val;
> +
> + /*
> + * SSC Settings. SSC will be enabled through Link
> + * SSC Ampl. = 0.4%
> + * SSC Freq = 31KHz
> + */
> + writeb_relaxed(PLL_SSC_STEP_MSB_VAL,
> + miphy_phy->base + PLL_SSC_STEP_MSB_REG);
> + writeb_relaxed(PLL_SSC_STEP_LSB_VAL,
> + miphy_phy->base + PLL_SSC_STEP_LSB_REG);
> + writeb_relaxed(PLL_SSC_PER_MSB_VAL,
> + miphy_phy->base + PLL_SSC_PER_MSB_REG);
> + writeb_relaxed(PLL_SSC_PER_LSB_VAL,
> + miphy_phy->base + PLL_SSC_PER_LSB_REG);
> +
> + /* SSC Settings complete */
> + if (miphy_dev->sata_gen == SATA_GEN1) {
> + val = PLL_START_CAL | BUF_EN | SYNCHRO_TX | CONFIG_PLL;
> + writeb_relaxed(val, miphy_phy->base + PLL_CTRL1_REG);
> + } else {
> + val = SSC_EN | PLL_START_CAL | BUF_EN | SYNCHRO_TX | CONFIG_PLL;
> + writeb_relaxed(val, miphy_phy->base + PLL_CTRL1_REG);
> + }
> +}
> +
> +static int miphy365x_phy_init_sata_port(struct miphy365x_phy *miphy_phy,
> + struct miphy365x_dev *miphy_dev)
> +{
> + int ret;
> + u8 val;
> +
> + /*
> + * Force PHY macro reset, PLL calibration reset, PLL reset
> + * and assert Deserializer Reset
> + */
> + val = RST_PLL | RST_PLL_CAL | RST_RX | RST_MACRO;
> + writeb_relaxed(val, miphy_phy->base + RESET_REG);
> +
> + if (miphy_dev->sata_tx_pol_inv)
> + writeb_relaxed(TX_POL, miphy_phy->base + CTRL_REG);
> +
> + /*
> + * Force macro1 to use rx_lspd, tx_lspd
> + * Force Rx_Clock on first I-DLL phase
> + * Force Des in HP mode on macro, rx_lspd, tx_lspd for Gen2/3
> + */
> + writeb_relaxed(SPDSEL_SEL, miphy_phy->base + BOUNDARY1_REG);
> + writeb_relaxed(START_CLK_HF, miphy_phy->base + IDLL_TEST_REG);
> + val = rx_tx_spd[miphy_dev->sata_gen];
> + writeb_relaxed(val, miphy_phy->base + BOUNDARY3_REG);
> +
> + /* Wait for HFC_READY = 0 */
> + ret = miphy365x_phy_hfc_not_rdy(miphy_phy, miphy_dev);
> + if (ret)
> + return ret;
> +
> + /* Compensation Recalibration */
> + miphy365x_phy_set_comp(miphy_phy, miphy_dev);
> +
> + switch (miphy_dev->sata_gen) {
> + case SATA_GEN3:
> + /*
> + * TX Swing target 550-600mv peak to peak diff
> + * Tx Slew target 90-110ps rising/falling time
> + * Rx Eq ON3, Sigdet threshold SDTH1
> + */
> + val = PD_VDDTFILTER | CONF_GEN_SEL_GEN3;
> + writeb_relaxed(val, miphy_phy->base + BUF_SEL_REG);
> + val = SWING_VAL | PREEMPH_VAL;
> + writeb_relaxed(val, miphy_phy->base + TXBUF1_REG);
> + writeb_relaxed(TXSLEW_VAL, miphy_phy->base + TXBUF2_REG);
> + writeb_relaxed(0x00, miphy_phy->base + RXBUF_OFFSET_CTRL_REG);
> + val = SDTHRES_VAL | EQ_ON3;
> + writeb_relaxed(val, miphy_phy->base + RXBUF_REG);
> + break;
> + case SATA_GEN2:
> + /*
> + * conf gen sel=0x1 to program Gen2 banked registers
> + * VDDT filter ON
> + * Tx Swing target 550-600mV peak-to-peak diff
> + * Tx Slew target 90-110 ps rising/falling time
> + * RX Equalization ON1, Sigdet threshold SDTH1
> + */
> + writeb_relaxed(CONF_GEN_SEL_GEN2,
> + miphy_phy->base + BUF_SEL_REG);
> + writeb_relaxed(SWING_VAL, miphy_phy->base + TXBUF1_REG);
> + writeb_relaxed(TXSLEW_VAL, miphy_phy->base + TXBUF2_REG);
> + val = SDTHRES_VAL | EQ_ON1;
> + writeb_relaxed(val, miphy_phy->base + RXBUF_REG);
> + break;
> + case SATA_GEN1:
> + /*
> + * conf gen sel = 00b to program Gen1 banked registers
> + * VDDT filter ON
> + * Tx Swing target 500-550mV peak-to-peak diff
> + * Tx Slew target120-140 ps rising/falling time
> + */
> + writeb_relaxed(PD_VDDTFILTER, miphy_phy->base + BUF_SEL_REG);
> + writeb_relaxed(SWING_VAL_GEN1, miphy_phy->base + TXBUF1_REG);
> + writeb_relaxed(TXSLEW_VAL_GEN1, miphy_phy->base + TXBUF2_REG);
> + break;
> + default:
> + break;
> + }
> +
> + /* Force Macro1 in partial mode & release pll cal reset */
> + writeb_relaxed(RST_RX, miphy_phy->base + RESET_REG);
> + usleep_range(100, 150);
> +
> + miphy365x_phy_set_ssc(miphy_phy, miphy_dev);
> +
> + /* Wait for phy_ready */
> + ret = miphy365x_phy_rdy(miphy_phy, miphy_dev);
> + if (ret)
> + return ret;
> +
> + /*
> + * Enable macro1 to use rx_lspd & tx_lspd
> + * Release Rx_Clock on first I-DLL phase on macro1
> + * Assert deserializer reset
> + * des_bit_lock_en is set
> + * bit lock detection strength
> + * Deassert deserializer reset
> + */
> + writeb_relaxed(0x00, miphy_phy->base + BOUNDARY1_REG);
> + writeb_relaxed(0x00, miphy_phy->base + IDLL_TEST_REG);
> + writeb_relaxed(RST_RX, miphy_phy->base + RESET_REG);
> + val = miphy_dev->sata_tx_pol_inv ?
> + (TX_POL | DES_BIT_LOCK_EN) : DES_BIT_LOCK_EN;
> + writeb_relaxed(val, miphy_phy->base + CTRL_REG);
> +
> + val = BIT_LOCK_CNT_512 | BIT_LOCK_LEVEL;
> + writeb_relaxed(val, miphy_phy->base + DES_BITLOCK_REG);
> + writeb_relaxed(0x00, miphy_phy->base + RESET_REG);
> +
> + return 0;
> +}
> +
> +static int miphy365x_phy_init(struct phy *phy)
> +{
> + int ret = 0;
> + struct miphy365x_phy *miphy_phy = phy_get_drvdata(phy);
> + struct miphy365x_dev *miphy_dev = miphy365x_phy_to_dev(miphy_phy);
> +
> + mutex_lock(&miphy_dev->miphy_mutex);
> +
> + ret = miphy365x_set_path(miphy_phy, miphy_dev);
> + if (ret) {
> + mutex_unlock(&miphy_dev->miphy_mutex);
> + return ret;
> + }
> +
> + /* Initialise Miphy for PCIe or SATA */
> + if (miphy_phy->type == MIPHY_TYPE_PCIE)
> + miphy365x_phy_init_pcie_port(miphy_phy, miphy_dev);
> + else
> + ret = miphy365x_phy_init_sata_port(miphy_phy, miphy_dev);
> +
> + mutex_unlock(&miphy_dev->miphy_mutex);
> +
> + return ret;
> +}
> +
> +static int miphy365x_phy_power_on(struct phy *phy)
> +{
> + return 0;
> +}
> +
> +static int miphy365x_phy_power_off(struct phy *phy)
> +{
> + return 0;
> +}
Both these empty functions can be removed.
> +
> +static struct phy *miphy365x_phy_xlate(struct device *dev,
> + struct of_phandle_args *args)
> +{
> + struct miphy365x_dev *state = dev_get_drvdata(dev);
> + u8 port = args->args[0];
> + u8 type = args->args[1];
> +
> + if (WARN_ON(port >= ARRAY_SIZE(ports)))
> + return ERR_PTR(-EINVAL);
> +
> + if (type == MIPHY_TYPE_SATA)
> + state->phys[port].base = state->phys[port].sata;
> + else if (type == MIPHY_TYPE_PCIE)
> + state->phys[port].base = state->phys[port].pcie;
> + else {
> + WARN(1, "Invalid type specified in DT");
> + return ERR_PTR(-EINVAL);
> + }
> +
> + state->phys[port].type = type;
> +
> + return state->phys[port].phy;
> +}
> +
> +static struct phy_ops miphy365x_phy_ops = {
> + .init = miphy365x_phy_init,
> + .power_on = miphy365x_phy_power_on,
> + .power_off = miphy365x_phy_power_off,
> + .owner = THIS_MODULE,
> +};
> +
> +static int miphy365x_phy_get_base_addr(struct platform_device *pdev,
> + struct miphy365x_phy *phy, u8 port)
> +{
> + struct resource *res;
> + char sata[16];
> + char pcie[16];
It can be done with a single variable ;-)
> +
> + sprintf(sata, "sata%d", port);
> +
> + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, sata);
> + if (!res)
> + return -ENODEV;
> +
> + phy->sata = devm_ioremap(&pdev->dev, res->start, resource_size(res));
> + if (!phy->sata)
> + return -ENOMEM;
> +
> + sprintf(pcie, "pcie%d", port);
> +
> + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, pcie);
> + if (!res)
> + return -ENODEV;
> +
> + phy->pcie = devm_ioremap(&pdev->dev, res->start, resource_size(res));
> + if (!phy->pcie)
> + return -ENOMEM;
> +
> + return 0;
> +}
> +
> +static int miphy365x_phy_of_probe(struct device_node *np,
> + struct miphy365x_dev *phy_dev)
> +{
> + const char *sata_gen;
> +
> + phy_dev->regmap = syscon_regmap_lookup_by_phandle(np, "st,syscfg");
> + if (IS_ERR(phy_dev->regmap)) {
> + dev_err(phy_dev->dev, "No syscfg phandle specified\n");
> + return PTR_ERR(phy_dev->regmap);
> + }
> +
> + /* Default */
> + phy_dev->sata_gen = SATA_GEN1;
> +
> + of_property_read_string(np, "st,sata_gen", &sata_gen);
> + if (sata_gen) {
> + if (!strcmp(sata_gen, "gen3"))
> + phy_dev->sata_gen = SATA_GEN3;
> + else if (!strcmp(sata_gen, "gen2"))
> + phy_dev->sata_gen = SATA_GEN2;
> + }
> +
> + phy_dev->pcie_tx_pol_inv =
> + of_property_read_bool(np, "st,pcie_tx_pol_inv");
> +
> + phy_dev->sata_tx_pol_inv =
> + of_property_read_bool(np, "st,sata_tx_pol_inv");
> +
> + return 0;
> +}
> +
> +static int miphy365x_phy_probe(struct platform_device *pdev)
> +{
> + struct device_node *np = pdev->dev.of_node;
> + struct miphy365x_dev *phy_dev;
> + struct device *dev = &pdev->dev;
> + struct phy_provider *provider;
> + u8 port;
> + int ret;
> +
> + if (!np) {
> + dev_err(dev, "No DT found\n");
> + return -EINVAL;
> + }
> +
> + phy_dev = devm_kzalloc(dev, sizeof(*phy_dev), GFP_KERNEL);
> + if (!phy_dev)
> + return -ENOMEM;
> +
> + ret = miphy365x_phy_of_probe(np, phy_dev);
> + if (ret)
> + return ret;
> +
> + phy_dev->dev = dev;
> +
> + dev_set_drvdata(dev, phy_dev);
> +
> + mutex_init(&phy_dev->miphy_mutex);
> +
> + provider = devm_of_phy_provider_register(dev, miphy365x_phy_xlate);
> + if (IS_ERR(provider))
> + return PTR_ERR(provider);
Phy provider register should be the last step in registering the PHY.
Thanks
Kishon
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