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Message-ID: <CAD=FV=V1qX_YTTygsz=v+p6BdG8VZcu8np2nDvm1NiJHDnf==g@mail.gmail.com>
Date: Tue, 31 May 2016 14:35:39 -0700
From: Doug Anderson <dianders@...omium.org>
To: Chris Zhong <zyw@...k-chips.com>
Cc: Tomasz Figa <tfiga@...omium.org>,
Heiko Stübner <heiko@...ech.de>,
姚智情 <yzq@...k-chips.com>,
"open list:ARM/Rockchip SoC..." <linux-rockchip@...ts.infradead.org>,
Kishon Vijay Abraham I <kishon@...com>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"linux-arm-kernel@...ts.infradead.org"
<linux-arm-kernel@...ts.infradead.org>,
Guenter Roeck <groeck@...gle.com>
Subject: Re: [PATCH 1/6] phy: Add USB Type-C PHY driver for rk3399
Chris,
On Thu, May 26, 2016 at 11:02 PM, Chris Zhong <zyw@...k-chips.com> wrote:
> Add a PHY provider driver for the rk3399 SoC Type-c PHY. The USB
> Type-C PHY is designed to support the USB3 and DP applications. The
> PHY basically has two main components: USB3 and DisplyPort. USB3
> operates in SuperSpeed mode and the DP can operate at RBR, HBR and
> HBR2 data rates.
>
> Signed-off-by: Chris Zhong <zyw@...k-chips.com>
> ---
>
> drivers/phy/Kconfig | 7 +
> drivers/phy/Makefile | 1 +
> drivers/phy/phy-rockchip-typec.c | 823 +++++++++++++++++++++++++++++++++++++++
> 3 files changed, 831 insertions(+)
This is a bit of a superficial review. Hopefully we can find someone
to do something more thorough.
> create mode 100644 drivers/phy/phy-rockchip-typec.c
>
> diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig
> index 26566db..dc388a3d 100644
> --- a/drivers/phy/Kconfig
> +++ b/drivers/phy/Kconfig
> @@ -351,6 +351,13 @@ config PHY_ROCKCHIP_DP
> help
> Enable this to support the Rockchip Display Port PHY.
>
> +config PHY_ROCKCHIP_TYPEC
> + tristate "Rockchip TYPEC PHY Driver"
> + depends on ARCH_ROCKCHIP && OF
> + select GENERIC_PHY
> + help
> + Enable this to support the Rockchip USB TYPEC PHY.
> +
> config PHY_ST_SPEAR1310_MIPHY
> tristate "ST SPEAR1310-MIPHY driver"
> select GENERIC_PHY
> diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile
> index 24596a9..91fa413 100644
> --- a/drivers/phy/Makefile
> +++ b/drivers/phy/Makefile
> @@ -39,6 +39,7 @@ obj-$(CONFIG_PHY_QCOM_APQ8064_SATA) += phy-qcom-apq8064-sata.o
> obj-$(CONFIG_PHY_ROCKCHIP_USB) += phy-rockchip-usb.o
> obj-$(CONFIG_PHY_ROCKCHIP_EMMC) += phy-rockchip-emmc.o
> obj-$(CONFIG_PHY_ROCKCHIP_DP) += phy-rockchip-dp.o
> +obj-$(CONFIG_PHY_ROCKCHIP_TYPEC) += phy-rockchip-typec.o
> obj-$(CONFIG_PHY_QCOM_IPQ806X_SATA) += phy-qcom-ipq806x-sata.o
> obj-$(CONFIG_PHY_ST_SPEAR1310_MIPHY) += phy-spear1310-miphy.o
> obj-$(CONFIG_PHY_ST_SPEAR1340_MIPHY) += phy-spear1340-miphy.o
> diff --git a/drivers/phy/phy-rockchip-typec.c b/drivers/phy/phy-rockchip-typec.c
> new file mode 100644
> index 0000000..6609cfb
> --- /dev/null
> +++ b/drivers/phy/phy-rockchip-typec.c
> @@ -0,0 +1,823 @@
> +/*
> + * Rockchip usb3 PHY driver
> + *
> + * Copyright (C) 2016 Kever Yang <kever.yang@...k-chips.com>
> + * Chris Zhong <zyw@...k-chips.com>
> + * Copyright (C) 2016 ROCKCHIP, Inc.
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License as published by
> + * the Free Software Foundation; either version 2 of the License.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> + * GNU General Public License for more details.
> + */
> +
> +#include <linux/clk.h>
> +#include <linux/clk-provider.h>
> +#include <linux/io.h>
> +#include <linux/iopoll.h>p
> +#include <linux/kernel.h>
> +#include <linux/module.h>
> +#include <linux/mutex.h>
> +#include <linux/of.h>
> +#include <linux/of_address.h>
> +#include <linux/of_platform.h>
> +#include <linux/phy/phy.h>
> +#include <linux/platform_device.h>
> +#include <linux/reset.h>
> +#include <linux/regmap.h>
> +#include <linux/mfd/syscon.h>
> +#include <linux/delay.h>
> +#include <linux/phy/phy-rockchip-typec.h>
> +
> +#define ADDR_ADJ 2
> +#define CMN_SSM_BANDGAP (0x21 << ADDR_ADJ)
> +#define CMN_SSM_BIAS (0x22 << ADDR_ADJ)
> +#define CMN_PLLSM0_PLLEN (0x29 << ADDR_ADJ)
> +#define CMN_PLLSM0_PLLPRE (0x2a << ADDR_ADJ)
> +#define CMN_PLLSM0_PLLVREF (0x2b << ADDR_ADJ)
> +#define CMN_PLLSM0_PLLLOCK (0x2c << ADDR_ADJ)
> +#define CMN_PLLSM1_PLLEN (0x31 << ADDR_ADJ)
> +#define CMN_PLLSM1_PLLPRE (0x32 << ADDR_ADJ)
> +#define CMN_PLLSM1_PLLVREF (0x33 << ADDR_ADJ)
> +#define CMN_PLLSM1_PLLLOCK (0x34 << ADDR_ADJ)
> +#define CMN_PLLSM1_USER_DEF_CTRL (0x37 << ADDR_ADJ)
> +#define CMN_ICAL_OVRD (0xc1 << ADDR_ADJ)
> +#define CMN_PLL0_VCOCAL_OVRD (0x83 << ADDR_ADJ)
> +#define CMN_PLL0_VCOCAL_INIT (0x84 << ADDR_ADJ)
> +#define CMN_PLL0_VCOCAL_ITER (0x85 << ADDR_ADJ)
> +#define CMN_PLL0_LOCK_REFCNT_START (0x90 << ADDR_ADJ)
> +#define CMN_PLL0_LOCK_PLLCNT_START (0x92 << ADDR_ADJ)
> +#define CMN_PLL0_LOCK_PLLCNT_THR (0x93 << ADDR_ADJ)
> +#define CMN_PLL0_INTDIV (0x94 << ADDR_ADJ)
> +#define CMN_PLL0_FRACDIV (0x95 << ADDR_ADJ)
> +#define CMN_PLL0_HIGH_THR (0x96 << ADDR_ADJ)
> +#define CMN_PLL0_DSM_DIAG (0x97 << ADDR_ADJ)
> +#define CMN_PLL0_SS_CTRL1 (0x98 << ADDR_ADJ)
> +#define CMN_PLL0_SS_CTRL2 (0x99 << ADDR_ADJ)
> +#define CMN_PLL1_VCOCAL_START (0xa1 << ADDR_ADJ)
> +#define CMN_PLL1_VCOCAL_OVRD (0xa3 << ADDR_ADJ)
> +#define CMN_PLL1_VCOCAL_INIT (0xa4 << ADDR_ADJ)
> +#define CMN_PLL1_VCOCAL_ITER (0xa5 << ADDR_ADJ)
> +#define CMN_PLL1_LOCK_REFCNT_START (0xb0 << ADDR_ADJ)
> +#define CMN_PLL1_LOCK_PLLCNT_START (0xb2 << ADDR_ADJ)
> +#define CMN_PLL1_LOCK_PLLCNT_THR (0xb3 << ADDR_ADJ)
> +#define CMN_PLL1_INTDIV (0xb4 << ADDR_ADJ)
> +#define CMN_PLL1_FRACDIV (0xb5 << ADDR_ADJ)
> +#define CMN_PLL1_HIGH_THR (0xb6 << ADDR_ADJ)
> +#define CMN_PLL1_DSM_DIAG (0xb7 << ADDR_ADJ)
> +#define CMN_PLL1_SS_CTRL1 (0xb8 << ADDR_ADJ)
> +#define CMN_PLL1_SS_CTRL2 (0xb9 << ADDR_ADJ)
> +#define CMN_RXCAL_OVRD (0xd1 << ADDR_ADJ)
> +#define CMN_TXPUCAL_CTRL (0xe0 << ADDR_ADJ)
> +#define CMN_TXPUCAL_OVRD (0xe1 << ADDR_ADJ)
> +#define CMN_TXPDCAL_OVRD (0xf1 << ADDR_ADJ)
> +#define CMN_DIAG_PLL0_FBH_OVRD (0x1c0 << ADDR_ADJ)
> +#define CMN_DIAG_PLL0_FBL_OVRD (0x1c1 << ADDR_ADJ)
> +#define CMN_DIAG_PLL0_OVRD (0x1c2 << ADDR_ADJ)
> +#define CMN_DIAG_PLL0_V2I_TUNE (0x1c5 << ADDR_ADJ)
> +#define CMN_DIAG_PLL0_CP_TUNE (0x1c6 << ADDR_ADJ)
> +#define CMN_DIAG_PLL0_LF_PROG (0x1c7 << ADDR_ADJ)
> +#define CMN_DIAG_PLL1_FBH_OVRD (0x1d0 << ADDR_ADJ)
> +#define CMN_DIAG_PLL1_FBL_OVRD (0x1d1 << ADDR_ADJ)
> +#define CMN_DIAG_PLL1_OVRD (0x1d2 << ADDR_ADJ)
> +#define CMN_DIAG_PLL1_V2I_TUNE (0x1d5 << ADDR_ADJ)
> +#define CMN_DIAG_PLL1_CP_TUNE (0x1d6 << ADDR_ADJ)
> +#define CMN_DIAG_PLL1_LF_PROG (0x1d7 << ADDR_ADJ)
> +#define CMN_DIAG_PLL1_PTATIS_TUNE1 (0x1d8 << ADDR_ADJ)
> +#define CMN_DIAG_PLL1_PTATIS_TUNE2 (0x1d9 << ADDR_ADJ)
> +#define CMN_DIAG_PLL1_INCLK_CTRL (0x1da << ADDR_ADJ)
> +#define CMN_DIAG_HSCLK_SEL (0x1e0 << ADDR_ADJ)
> +
> +#define XCVR_PSM_RCTRL(n) ((0x4001 | (n << 9)) << ADDR_ADJ)
> +#define XCVR_PSM_CAL_TMR(n) ((0x4002 | (n << 9)) << ADDR_ADJ)
> +#define XCVR_PSM_A0IN_TMR(n) ((0x4003 | (n << 9)) << ADDR_ADJ)
> +#define TX_TXCC_CAL_SCLR_MULT(n) ((0x4047 | (n << 9)) << ADDR_ADJ)
> +#define TX_TXCC_CPOST_MULT_00(n) ((0x404c | (n << 9)) << ADDR_ADJ)
> +#define TX_TXCC_CPOST_MULT_01(n) ((0x404d | (n << 9)) << ADDR_ADJ)
> +#define TX_TXCC_CPOST_MULT_10(n) ((0x404e | (n << 9)) << ADDR_ADJ)
> +#define TX_TXCC_CPOST_MULT_11(n) ((0x404f | (n << 9)) << ADDR_ADJ)
> +#define TX_TXCC_MGNFS_MULT_000(n) ((0x4050 | (n << 9)) << ADDR_ADJ)
> +#define TX_TXCC_MGNFS_MULT_001(n) ((0x4051 | (n << 9)) << ADDR_ADJ)
> +#define TX_TXCC_MGNFS_MULT_010(n) ((0x4052 | (n << 9)) << ADDR_ADJ)
> +#define TX_TXCC_MGNFS_MULT_011(n) ((0x4053 | (n << 9)) << ADDR_ADJ)
> +#define TX_TXCC_MGNFS_MULT_100(n) ((0x4054 | (n << 9)) << ADDR_ADJ)
> +#define TX_TXCC_MGNFS_MULT_101(n) ((0x4055 | (n << 9)) << ADDR_ADJ)
> +#define TX_TXCC_MGNFS_MULT_110(n) ((0x4056 | (n << 9)) << ADDR_ADJ)
> +#define TX_TXCC_MGNFS_MULT_111(n) ((0x4057 | (n << 9)) << ADDR_ADJ)
> +#define XCVR_DIAG_PLLDRC_CTRL(n) ((0x40e0 | (n << 9)) << ADDR_ADJ)
> +#define XCVR_DIAG_BIDI_CTRL(n) ((0x40e8 | (n << 9)) << ADDR_ADJ)
> +#define XCVR_DIAG_LANE_FCM_EN_MGN(n) ((0x40f2 | (n << 9)) << ADDR_ADJ)
> +#define TX_PSC_A0(n) ((0x4100 | (n << 9)) << ADDR_ADJ)
> +#define TX_PSC_A1(n) ((0x4101 | (n << 9)) << ADDR_ADJ)
> +#define TX_PSC_A2(n) ((0x4102 | (n << 9)) << ADDR_ADJ)
> +#define TX_PSC_A3(n) ((0x4103 | (n << 9)) << ADDR_ADJ)
> +#define TX_RCVDET_CTRL(n) ((0x4120 | (n << 9)) << ADDR_ADJ)
> +#define TX_RCVDET_EN_TMR(n) ((0x4122 | (n << 9)) << ADDR_ADJ)
> +#define TX_RCVDET_ST_TMR(n) ((0x4123 | (n << 9)) << ADDR_ADJ)
> +#define TX_DIAG_TX_DRV(n) ((0x41e1 | (n << 9)) << ADDR_ADJ)
> +#define TX_DIAG_BGREF_PREDRV_DELAY (0x41e7 << ADDR_ADJ)
> +#define TX_ANA_CTRL_REG_1 (0x5020 << ADDR_ADJ)
> +#define TX_ANA_CTRL_REG_2 (0x5021 << ADDR_ADJ)
> +#define TXDA_COEFF_CALC_CTRL (0x5022 << ADDR_ADJ)
> +#define TX_DIG_CTRL_REG_2 (0x5024 << ADDR_ADJ)
> +#define TXDA_CYA_AUXDA_CYA (0x5025 << ADDR_ADJ)
> +#define TX_ANA_CTRL_REG_3 (0x5026 << ADDR_ADJ)
> +#define TX_ANA_CTRL_REG_4 (0x5027 << ADDR_ADJ)
> +#define TX_ANA_CTRL_REG_5 (0x5029 << ADDR_ADJ)
> +
> +#define RX_PSC_A0(n) ((0x8000 | (n << 9)) << ADDR_ADJ)
> +#define RX_PSC_A1(n) ((0x8001 | (n << 9)) << ADDR_ADJ)
> +#define RX_PSC_A2(n) ((0x8002 | (n << 9)) << ADDR_ADJ)
> +#define RX_PSC_A3(n) ((0x8003 | (n << 9)) << ADDR_ADJ)
> +#define RX_PSC_CAL(n) ((0x8006 | (n << 9)) << ADDR_ADJ)
> +#define RX_PSC_RDY(n) ((0x8007 | (n << 9)) << ADDR_ADJ)
> +#define RX_IQPI_ILL_CAL_OVRD (0x8023 << ADDR_ADJ)
> +#define RX_EPI_ILL_CAL_OVRD (0x8033 << ADDR_ADJ)
> +#define RX_SDCAL0_OVRD (0x8041 << ADDR_ADJ)
> +#define RX_SDCAL1_OVRD (0x8049 << ADDR_ADJ)
> +#define RX_SLC_INIT (0x806d << ADDR_ADJ)
> +#define RX_SLC_RUN (0x806e << ADDR_ADJ)
> +#define RX_CDRLF_CNFG2 (0x8081 << ADDR_ADJ)
> +#define RX_SIGDET_HL_FILT_TMR(n) ((0x8090 | (n << 9)) << ADDR_ADJ)
> +#define RX_SLC_IOP0_OVRD (0x8101 << ADDR_ADJ)
> +#define RX_SLC_IOP1_OVRD (0x8105 << ADDR_ADJ)
> +#define RX_SLC_QOP0_OVRD (0x8109 << ADDR_ADJ)
> +#define RX_SLC_QOP1_OVRD (0x810d << ADDR_ADJ)
> +#define RX_SLC_EOP0_OVRD (0x8111 << ADDR_ADJ)
> +#define RX_SLC_EOP1_OVRD (0x8115 << ADDR_ADJ)
> +#define RX_SLC_ION0_OVRD (0x8119 << ADDR_ADJ)
> +#define RX_SLC_ION1_OVRD (0x811d << ADDR_ADJ)
> +#define RX_SLC_QON0_OVRD (0x8121 << ADDR_ADJ)
> +#define RX_SLC_QON1_OVRD (0x8125 << ADDR_ADJ)
> +#define RX_SLC_EON0_OVRD (0x8129 << ADDR_ADJ)
> +#define RX_SLC_EON1_OVRD (0x812d << ADDR_ADJ)
> +#define RX_SLC_IEP0_OVRD (0x8131 << ADDR_ADJ)
> +#define RX_SLC_IEP1_OVRD (0x8135 << ADDR_ADJ)
> +#define RX_SLC_QEP0_OVRD (0x8139 << ADDR_ADJ)
> +#define RX_SLC_QEP1_OVRD (0x813d << ADDR_ADJ)
> +#define RX_SLC_EEP0_OVRD (0x8141 << ADDR_ADJ)
> +#define RX_SLC_EEP1_OVRD (0x8145 << ADDR_ADJ)
> +#define RX_SLC_IEN0_OVRD (0x8149 << ADDR_ADJ)
> +#define RX_SLC_IEN1_OVRD (0x814d << ADDR_ADJ)
> +#define RX_SLC_QEN0_OVRD (0x8151 << ADDR_ADJ)
> +#define RX_SLC_QEN1_OVRD (0x8155 << ADDR_ADJ)
> +#define RX_SLC_EEN0_OVRD (0x8159 << ADDR_ADJ)
> +#define RX_SLC_EEN1_OVRD (0x815d << ADDR_ADJ)
> +#define RX_DIAG_SIGDET_TUNE(n) ((0x81dc | (n << 9)) << ADDR_ADJ)
> +#define RX_DIAG_SC2C_DELAY (0x81e1 << ADDR_ADJ)
> +
> +#define PMA_LANE_CFG (0xc000 << ADDR_ADJ)
> +#define PIPE_CMN_CTRL1 (0xc001 << ADDR_ADJ)
> +#define PIPE_CMN_CTRL2 (0xc002 << ADDR_ADJ)
> +#define PIPE_COM_LOCK_CFG1 (0xc003 << ADDR_ADJ)
> +#define PIPE_COM_LOCK_CFG2 (0xc004 << ADDR_ADJ)
> +#define PIPE_RCV_DET_INH (0xc005 << ADDR_ADJ)
> +#define DP_MODE_CTL (0xc008 << ADDR_ADJ)
> +#define DP_CLK_CTL (0xc009 << ADDR_ADJ)
> +#define STS (0xc00F << ADDR_ADJ)
> +#define PHY_ISO_CMN_CTRL (0xc010 << ADDR_ADJ)
> +#define PHY_DP_TX_CTL (0xc408 << ADDR_ADJ)
> +#define PMA_CMN_CTRL1 (0xc800 << ADDR_ADJ)
> +#define PHY_PMA_ISO_CMN_CTRL (0xc810 << ADDR_ADJ)
> +#define PHY_ISOLATION_CTRL (0xc81f << ADDR_ADJ)
> +#define PHY_PMA_ISO_XCVR_CTRL(n) ((0xcc11 | (n << 6)) << ADDR_ADJ)
> +#define PHY_PMA_ISO_LINK_MODE(n) ((0xcc12 | (n << 6)) << ADDR_ADJ)
> +#define PHY_PMA_ISO_PWRST_CTRL(n) ((0xcc13 | (n << 6)) << ADDR_ADJ)
> +#define PHY_PMA_ISO_TX_DATA_LO(n) ((0xcc14 | (n << 6)) << ADDR_ADJ)
> +#define PHY_PMA_ISO_TX_DATA_HI(n) ((0xcc15 | (n << 6)) << ADDR_ADJ)
> +#define PHY_PMA_ISO_RX_DATA_LO(n) ((0xcc16 | (n << 6)) << ADDR_ADJ)
> +#define PHY_PMA_ISO_RX_DATA_HI(n) ((0xcc17 | (n << 6)) << ADDR_ADJ)
> +#define TX_BIST_CTRL(n) ((0x4140 | (n << 9)) << ADDR_ADJ)
> +#define TX_BIST_UDDWR(n) ((0x4141 | (n << 9)) << ADDR_ADJ)
> +
> +#define GRF_SOC_CON26 0x6268
> +#define UPHY_DP_SEL BIT(3)
> +#define UPHY_DP_SEL_MASK BIT(19)
> +#define DPTX_HDP_SEL (3 << 12)
> +#define DPTX_HDP_SEL_MASK (3 << 28)
> +
> +#define PHY_MODE_SET_TIMEOUT 1000000
> +
> +#define MODE_DISCONNECT 1
> +#define MODE_UFP 2
> +#define MODE_DFP_USBONLY 3
> +#define MODE_DFP_DPONLY 4
> +#define MODE_DFP_USB3DP 5
> +#define MODE_DFP_USB2DP 6
> +
> +#define PARSE_GRF_REG(TYPE) { \
> + if (of_find_property(np, "rockchip,usb3phy_"#TYPE, &len)) { \
> + len /= sizeof(u32);\
> + ret = of_property_read_u32_array(np, "rockchip,usb3phy_" #TYPE,\
> + array, len); \
> + exregs->usb3phy_##TYPE = array[0]; \
> + exregs->usb3phy_##TYPE##_shift = array[1]; \
> + exregs->usb3phy_##TYPE##_mask = array[2]; \
> + pr_info("%s property found %s, %x, %d, %d\n", __func__, \
> + "rockchip,usb3phy_"#TYPE, \
> + array[0], array[1], array[2]); \
> + } else { \
> + pr_info("%s property not found %s\n", __func__, \
> + "rockchip,usb3phy_" #TYPE); \
> + } \
> +}
> +
> +struct rockchip_typec_phy *rockchip_tcphy;
Unused global?
> +
> +static void tcphy_cfg_24m(struct rockchip_typec_phy *tcphy,
> + unsigned int num_lanes)
> +{
> + unsigned int i;()?
> +
> + writel(0x830, tcphy->base + PMA_CMN_CTRL1);
> + for (i = 0; i < num_lanes; i++) {
> + writel(0x90, tcphy->base + XCVR_DIAG_LANE_FCM_EN_MGN(i));
> + writel(0x960, tcphy->base + TX_RCVDET_EN_TMR(i));
> + writel(0x30, tcphy->base + TX_RCVDET_ST_TMR(i));
Would it be too much to ask to get more details about all these magic values?
> + }
> +}
> +
> +static void tcphy_cfg_usb_pll(struct rockchip_typec_phy *tcphy)
> +{
> + unsigned int rdata;
> +
> + rdata = readl(tcphy->base + CMN_DIAG_HSCLK_SEL);
> + writel(rdata & 0xfffc, tcphy->base + CMN_DIAG_HSCLK_SEL);
> + writel(0xf0, tcphy->base + CMN_PLL0_VCOCAL_INIT);
> + writel(0x18, tcphy->base + CMN_PLL0_VCOCAL_ITER);
> + writel(0xd0, tcphy->base + CMN_PLL0_INTDIV);
> + writel(0x4a4a, tcphy->base + CMN_PLL0_FRACDIV);
> + writel(0x34, tcphy->base + CMN_PLL0_HIGH_THR);
> + writel(0x1ee, tcphy->base + CMN_PLL0_SS_CTRL1);
> + writel(0x7f03, tcphy->base + CMN_PLL0_SS_CTRL2);
> + writel(0x20, tcphy->base + CMN_PLL0_DSM_DIAG);
> + writel(0, tcphy->base + CMN_DIAG_PLL0_OVRD);
> + writel(0, tcphy->base + CMN_DIAG_PLL0_FBH_OVRD);
> + writel(0, tcphy->base + CMN_DIAG_PLL0_FBL_OVRD);
> + writel(0x7, tcphy->base + CMN_DIAG_PLL0_V2I_TUNE);
> + writel(0x45, tcphy->base + CMN_DIAG_PLL0_CP_TUNE);
> + writel(0x8, tcphy->base + CMN_DIAG_PLL0_LF_PROG);
> +}
> +
> +static void tcphy_cfg_dp_pll(struct rockchip_typec_phy *tcphy)
> +{
> + unsigned int rdata;
> +
> + writel(0x2405, tcphy->base + DP_CLK_CTL);
> +
> + rdata = readl(tcphy->base + CMN_DIAG_HSCLK_SEL);
> + rdata = (rdata & 0xffcf) | 0x30;
> + writel(rdata, tcphy->base + CMN_DIAG_HSCLK_SEL);
> + writel(0xf0, tcphy->base + CMN_PLL1_VCOCAL_INIT);
> + writel(0x18, tcphy->base + CMN_PLL1_VCOCAL_ITER);
> + writel(0x30b9, tcphy->base + CMN_PLL1_VCOCAL_START);
> + writel(0x21c, tcphy->base + CMN_PLL1_INTDIV);
> + writel(0, tcphy->base + CMN_PLL1_FRACDIV);
> + writel(0x5, tcphy->base + CMN_PLL1_HIGH_THR);
> + writel(0x35, tcphy->base + CMN_PLL1_SS_CTRL1);
> + writel(0x7f1e, tcphy->base + CMN_PLL1_SS_CTRL2);
> + writel(0x20, tcphy->base + CMN_PLL1_DSM_DIAG);
> + writel(0, tcphy->base + CMN_PLLSM1_USER_DEF_CTRL);
> + writel(0, tcphy->base + CMN_DIAG_PLL1_OVRD);
> + writel(0, tcphy->base + CMN_DIAG_PLL1_FBH_OVRD);
> + writel(0, tcphy->base + CMN_DIAG_PLL1_FBL_OVRD);
> + writel(0x6, tcphy->base + CMN_DIAG_PLL1_V2I_TUNE);
> + writel(0x45, tcphy->base + CMN_DIAG_PLL1_CP_TUNE);
> + writel(0x8, tcphy->base + CMN_DIAG_PLL1_LF_PROG);
> + writel(0x100, tcphy->base + CMN_DIAG_PLL1_PTATIS_TUNE1);
> + writel(0x7, tcphy->base + CMN_DIAG_PLL1_PTATIS_TUNE2);
> + writel(0x4, tcphy->base + CMN_DIAG_PLL1_INCLK_CTRL);
> +}
> +
> +static void tcphy_tx_usb_cfg_lane(struct rockchip_typec_phy *tcphy,
> + unsigned int lane)
> +{
> + writel(0x7799, tcphy->base + TX_PSC_A0(lane));
> + writel(0x7798, tcphy->base + TX_PSC_A1(lane));
> + writel(0x5098, tcphy->base + TX_PSC_A2(lane));
> + writel(0x5098, tcphy->base + TX_PSC_A3(lane));
> + writel(0, tcphy->base + TX_TXCC_MGNFS_MULT_000(lane));
> + writel(0xbf, tcphy->base + XCVR_DIAG_BIDI_CTRL(lane));
> +}
> +
> +static void tcphy_rx_usb_cfg_lane(struct rockchip_typec_phy *tcphy,
> + unsigned int lane)
> +{
> + writel(0xa6fd, tcphy->base + RX_PSC_A0(lane));
> + writel(0xa6fd, tcphy->base + RX_PSC_A1(lane));
> + writel(0xa410, tcphy->base + RX_PSC_A2(lane));
> + writel(0x2410, tcphy->base + RX_PSC_A3(lane));
> + writel(0x23ff, tcphy->base + RX_PSC_CAL(lane));
> + writel(0x13, tcphy->base + RX_SIGDET_HL_FILT_TMR(lane));
> + writel(0x1004, tcphy->base + RX_DIAG_SIGDET_TUNE(lane));
> + writel(0x2010, tcphy->base + RX_PSC_RDY(lane));
> + writel(0xfb, tcphy->base + XCVR_DIAG_BIDI_CTRL(lane));
> +}
> +
> +static void tcphy_dp_cfg_lane(struct rockchip_typec_phy *tcphy,
> + unsigned int lane)
> +{
> + unsigned int rdata;
> +
> + writel(0xbefc, tcphy->base + XCVR_PSM_RCTRL(lane));
> + writel(0x6799, tcphy->base + TX_PSC_A0(lane));
> + writel(0x6798, tcphy->base + TX_PSC_A1(lane));
> + writel(0x98, tcphy->base + TX_PSC_A2(lane));
> + writel(0x98, tcphy->base + TX_PSC_A3(lane));
> + writel(0, tcphy->base + TX_TXCC_MGNFS_MULT_000(lane));
> + writel(0, tcphy->base + TX_TXCC_MGNFS_MULT_001(lane));
> + writel(0, tcphy->base + TX_TXCC_MGNFS_MULT_010(lane));
> + writel(0, tcphy->base + TX_TXCC_MGNFS_MULT_011(lane));
> + writel(0, tcphy->base + TX_TXCC_MGNFS_MULT_100(lane));
> + writel(0, tcphy->base + TX_TXCC_MGNFS_MULT_101(lane));
> + writel(0, tcphy->base + TX_TXCC_MGNFS_MULT_110(lane));
> + writel(0, tcphy->base + TX_TXCC_MGNFS_MULT_111(lane));
> +
> + writel(0, tcphy->base + TX_TXCC_CPOST_MULT_10(lane));
> + writel(0, tcphy->base + TX_TXCC_CPOST_MULT_01(lane));
> + writel(0, tcphy->base + TX_TXCC_CPOST_MULT_00(lane));
> + writel(0, tcphy->base + TX_TXCC_CPOST_MULT_11(lane));
> +
> + writel(0x128, tcphy->base + TX_TXCC_CAL_SCLR_MULT(lane));
> + writel(0x700, tcphy->base + TX_DIAG_TX_DRV(lane));
> +
> + rdata = readl(tcphy->base + XCVR_DIAG_PLLDRC_CTRL(lane));
> + rdata = (rdata & 0x8fff) | 0x6000;
> + writel(rdata, tcphy->base + XCVR_DIAG_PLLDRC_CTRL(lane));
> +}
> +
> +static void tcphy_cfg_pin_assign(struct rockchip_typec_phy *tcphy)
> +{
> + switch (tcphy->map) {
> + case PIN_MAP_A:
> + writel(0x19d5, tcphy->base + PMA_LANE_CFG);
> + break;
> + case PIN_MAP_B:
> + writel(0x1500, tcphy->base + PMA_LANE_CFG);
> + break;
> + case PIN_MAP_C:
> + case PIN_MAP_E:
> + writel(0x51d9, tcphy->base + PMA_LANE_CFG);
> + break;
> + case PIN_MAP_D:
> + case PIN_MAP_F:
> + writel(0x5100, tcphy->base + PMA_LANE_CFG);
> + break;
> + };
> +}
> +
> +static void tcphy_cfg_lanes(struct rockchip_typec_phy *tcphy,
> + unsigned int link_cfg)
> +{
> + unsigned int i;
> +
> + /* PMA lane configuration DP or USB3 */
> + for (i = 0; i < 4; i++) {
> + if ((link_cfg >> i) & 0x1) {
> + tcphy_dp_cfg_lane(tcphy, i);
> + } else {
> + /*
> + * lan0 TX and lan1 RX for USB3 Normal direction
> + * lan3 TX and lan2 RX for USB3 Flip direction
> + */
> + if ((i == 0) | (i == 3))
> + tcphy_tx_usb_cfg_lane(tcphy, i);
> + else
> + tcphy_rx_usb_cfg_lane(tcphy, i);
> + }
> + }
> +}
> +
> +static void tcphy_cfg_flip_set(struct rockchip_typec_phy *tcphy)
> +{
> + regmap_write(tcphy->grf_regs,
> + tcphy->exregs.usb3phy_con0,
> + tcphy->flip | BIT(16));
> +
> + tcphy_cfg_24m(tcphy, 0x4);
> +
> + if (tcphy->mode == MODE_UFP ||
> + tcphy->mode == MODE_DFP_USBONLY ||
> + tcphy->mode == MODE_DFP_USB3DP)
> + tcphy_cfg_usb_pll(tcphy);
> +
> + if (tcphy->mode == MODE_DFP_DPONLY ||
> + tcphy->mode == MODE_DFP_USB2DP ||
> + tcphy->mode == MODE_DFP_USB3DP)
> + tcphy_cfg_dp_pll(tcphy);
> +
> + if (tcphy->mode == MODE_DFP_DPONLY || tcphy->mode == MODE_DFP_USB2DP)
> + tcphy_cfg_lanes(tcphy, 0xf);
> + else if (tcphy->flip)
> + tcphy_cfg_lanes(tcphy, 0x3);
> + else
> + tcphy_cfg_lanes(tcphy, 0xc);
> +}
> +
> +static void tcphy_dp_aux_calibration(struct rockchip_typec_phy *tcphy)
> +{
> + int rdata, rdata2, val;
> +
> + rdata = readl(tcphy->base + TX_ANA_CTRL_REG_1);
> + rdata2 = readl(tcphy->base + CMN_TXPUCAL_CTRL);
> +
> + rdata = rdata & 0xdfff;
> + writel(rdata, tcphy->base + TX_ANA_CTRL_REG_1);
> +
> + rdata = readl(tcphy->base + TX_DIG_CTRL_REG_2);
> + rdata = rdata & 0xffc0;
> + rdata2 = rdata2 & 0x3f;
> + rdata = rdata | rdata2;
> + writel(rdata, tcphy->base + TX_DIG_CTRL_REG_2);
> + usleep_range(1000, 2000);
nit: this is at init time and will be run once. Power savings of
trying to group wakeups will be minimal or none. Last I looked
usleep_range() nearly always takes the longer of the two times unless
it happens to wake up anyway. Make the range smaller and boot time
will be 1ms faster. Try usleep_range(1000, 1050).
> +
> + rdata = readl(tcphy->base + TX_ANA_CTRL_REG_1);
> + rdata = rdata | 0x2000;
> + writel(rdata, tcphy->base + TX_ANA_CTRL_REG_1);
> +
> + usleep_range(150, 200);
> +
> + writel(0, tcphy->base + PHY_DP_TX_CTL);
> + writel(0x100, tcphy->base + TX_ANA_CTRL_REG_2);
> + writel(0x300, tcphy->base + TX_ANA_CTRL_REG_2);
> + writel(0, tcphy->base + TX_ANA_CTRL_REG_3);
> + writel(0x2008, tcphy->base + TX_ANA_CTRL_REG_1);
> + writel(0x2018, tcphy->base + TX_ANA_CTRL_REG_1);
> + writel(0x30C, tcphy->base + TX_ANA_CTRL_REG_2);
> + writel(0, tcphy->base + TX_ANA_CTRL_REG_5);
> + writel(0x1001, tcphy->base + TX_ANA_CTRL_REG_4);
> + writel(0x2098, tcphy->base + TX_ANA_CTRL_REG_1);
> + writel(0x2198, tcphy->base + TX_ANA_CTRL_REG_1);
> + writel(0x30d, tcphy->base + TX_ANA_CTRL_REG_2);
> + writel(0x30f, tcphy->base + TX_ANA_CTRL_REG_2);
> +
> + if (tcphy->flip)
> + writel(0xa078, tcphy->base + TX_ANA_CTRL_REG_1);
> + else
> + writel(0xb078, tcphy->base + TX_ANA_CTRL_REG_1);
> +
> + writel(0x303, tcphy->base + TX_ANA_CTRL_REG_2);
> + writel(0, tcphy->base + TX_ANA_CTRL_REG_3);
> + writel(0, tcphy->base + TX_ANA_CTRL_REG_4);
> + writel(0, tcphy->base + TX_ANA_CTRL_REG_5);
> + writel(4, tcphy->base + TXDA_COEFF_CALC_CTRL);
> + writel(0, tcphy->base + TXDA_CYA_AUXDA_CYA);
> +
> + val = readl(tcphy->base + TX_DIG_CTRL_REG_2);
> + val |= BIT(15);
> + writel(val, tcphy->base + TX_DIG_CTRL_REG_2);
> +}
> +
> +static void tcphy_dp_hpd(struct rockchip_typec_phy *tcphy,
> + u8 mode)
> +{
> + /* force hpd */
> + if (mode)
> + regmap_write(tcphy->grf_regs, GRF_SOC_CON26,
> + DPTX_HDP_SEL_MASK | DPTX_HDP_SEL);
> + else
> + regmap_write(tcphy->grf_regs, GRF_SOC_CON26,
> + DPTX_HDP_SEL_MASK);
> +}
> +
> +static int tcphy_usb3_init(struct rockchip_typec_phy *tcphy)
> +{
> + int timeout = 0;
> + int ret, val;
> +
> + /*wait TCPHY for pipe ready */
> + while (1) {
> + ret = regmap_read(tcphy->grf_regs,
> + tcphy->exregs.usb3phy_status0, &val);
> + val >>= tcphy->exregs.usb3phy_status0_shift;
> + if ((val & 0x1) == 0)
> + break;
> +
> + timeout++;
> + if (timeout > 1000) {
> + pr_warn("%s wait pipe ready timerout!\n", __func__);
> + break;
> + }
> + usleep_range(10, 20);
> + }
> +
> + return 0;
> +}
> +
> +static int tcphy_dp_init(struct rockchip_typec_phy *tcphy)
> +{
> + int ret, val;
> +
> + ret = readx_poll_timeout(readl, tcphy->base + DP_MODE_CTL,
> + val, val & BIT(6), 1000, PHY_MODE_SET_TIMEOUT);
> + if (ret < 0) {
> + dev_err(tcphy->dev, "failed to wait TCPHY for DP ready\n");
> + return -EBUSY;
> + }
> +
> + tcphy_dp_aux_calibration(tcphy);
> +
> + if (tcphy->mode == MODE_DFP_USB3DP)
> + writel(0xc101, tcphy->base + DP_MODE_CTL);
> + else
> + writel(0x0101, tcphy->base + DP_MODE_CTL);
> +
> + ret = readx_poll_timeout(readl, tcphy->base + DP_MODE_CTL,
> + val, val & BIT(4), 1000, PHY_MODE_SET_TIMEOUT);
> + if (ret < 0) {
> + dev_err(tcphy->dev, "failed to wait TCPHY enter A0\n");
> + return -EBUSY;
> + }
> +
> + return 0;
> +}
> +
> +static int tcphy_phy_init(struct rockchip_typec_phy *tcphy)
> +{
> + int ret;
> + int timeout = 0;
> +
> + ret = clk_prepare_enable(tcphy->clk_core);
> + if (ret) {
> + dev_err(tcphy->dev, "Failed to prepare_enable core clock\n");
> + return ret;
> + }
> +
> + ret = clk_prepare_enable(tcphy->clk_ref);
> + if (ret) {
> + dev_err(tcphy->dev, "Failed to prepare_enable ref clock\n");
> + return ret;
> + }
> +
> + /* select external psm clock */
> + regmap_write(tcphy->grf_regs, tcphy->exregs.usb3phy_con2,
> + BIT(14) | BIT(30));
> + regmap_write(tcphy->grf_regs, tcphy->exregs.usb3phy_con0, BIT(19));
> +
> + reset_control_assert(tcphy->phy_rst);
> + reset_control_assert(tcphy->pipe_rst);
> + reset_control_assert(tcphy->uphy_rst);
> +
> + if (tcphy->num == TYPEC_PHY0)
> + regmap_write(tcphy->grf_regs, GRF_SOC_CON26,
> + UPHY_DP_SEL_MASK);
> + else
> + regmap_write(tcphy->grf_regs, GRF_SOC_CON26,
> + UPHY_DP_SEL_MASK | UPHY_DP_SEL);
> +
> + reset_control_deassert(tcphy->uphy_rst);
> +
> + tcphy_cfg_flip_set(tcphy);
> +
> + tcphy_cfg_pin_assign(tcphy);
> +
> + if (tcphy->mode == MODE_DFP_USB3DP)
> + writel(0xc104, tcphy->base + DP_MODE_CTL);
> + else if ((tcphy->mode == MODE_DFP_DPONLY) ||
> + (tcphy->mode == MODE_DFP_USB2DP))
> + writel(0x0104, tcphy->base + DP_MODE_CTL);
> +
> + reset_control_deassert(tcphy->phy_rst);
> +
> + while (!(readl(tcphy->base + PMA_CMN_CTRL1) & 1)) {
> + timeout++;
> + if (timeout > 1000)
> + break;
> + usleep_range(10, 20);
> + }
> +
> + reset_control_deassert(tcphy->pipe_rst);
> +
> + return 0;
> +}
> +
> +static int tcphy_phy_deinit(struct rockchip_typec_phy *tcphy)
> +{
> + clk_disable_unprepare(tcphy->clk_core);
> + clk_disable_unprepare(tcphy->clk_ref);
> +
> + return 0;
> +}
> +
> +int tcphy_register_notifier(struct phy *_phy, struct notifier_block *nb)
Is there a reason this isn't static?
> +{
> + struct rockchip_typec_phy *tcphy = phy_get_drvdata(_phy);
> +
> + return atomic_notifier_chain_register(&tcphy->notifier, nb);
> +}
> +
> +void tcphy_unregister_notifier(struct phy *_phy,
> + struct notifier_block *nb)
Is there a reason this isn't static?
> +{
> + struct rockchip_typec_phy *tcphy = phy_get_drvdata(_phy);
> +
> + atomic_notifier_chain_unregister(&tcphy->notifier, nb);
> +}
> +
> +void tcphy_notifier_call_chain(struct rockchip_typec_phy *x,
> + unsigned long val, void *v)
> +{
> + atomic_notifier_call_chain(&x->notifier, val, v);
> +}
> +EXPORT_SYMBOL_GPL(tcphy_notifier_call_chain);
> +
> +static int tcphy_pd_event(struct notifier_block *nb,
> + unsigned long event, void *priv)
> +{
> + struct rockchip_typec_phy *tcphy;
> + int value = *(int *)priv;
> + u8 is_dp, dfp;
> +
> + tcphy = container_of(nb, struct rockchip_typec_phy, event_nb);
> + if (IS_ERR_OR_NULL(tcphy)) {
> + pr_err("initialization issue");
> + return -1;
> + }
> +
> + tcphy->flip = GET_FLIP(value);
> + dfp = GET_DFP(value);
> + is_dp = GET_DP(value);
> + tcphy->map = GET_PIN_MAP(value);
> +
> + if (event == 0) {
> + if (tcphy->mode == MODE_DISCONNECT)
> + return 0;
> + tcphy->mode = MODE_DISCONNECT;
> + } else if (is_dp) {
> + if (tcphy->map & (PIN_MAP_B | PIN_MAP_D | PIN_MAP_F))
> + tcphy->mode = MODE_DFP_USB3DP;
> + else
> + tcphy->mode = MODE_DFP_DPONLY;
> + } else if (dfp) {
> + tcphy->mode = MODE_DFP_USBONLY;
> + } else {
> + tcphy->mode = MODE_UFP;
> + }
> +
> + schedule_delayed_work_on(0, &tcphy->event_wq, 0);
> +
> + return 0;
> +}
> +
> +static void tcphy_event_wq(struct work_struct *work)
> +{
> + struct rockchip_typec_phy *tcphy;
> +
> + tcphy = container_of(work, struct rockchip_typec_phy, event_wq.work);
> + if (IS_ERR_OR_NULL(tcphy)) {
> + pr_err("initialization issue");
> + return;
> + }
> +
> + switch (tcphy->mode) {
> + case MODE_DISCONNECT:
> + /* phy enter low power mode */
> + tcphy_phy_deinit(tcphy);
> + tcphy_dp_hpd(tcphy, 0);
> + break;
> + case MODE_UFP:
> + tcphy_phy_init(tcphy);
> + tcphy_usb3_init(tcphy);
> + tcphy_dp_hpd(tcphy, 0);
> + break;
> + case MODE_DFP_USBONLY:
> + tcphy_phy_init(tcphy);
> + tcphy_usb3_init(tcphy);
> + tcphy_dp_hpd(tcphy, 0);
> + break;
> + case MODE_DFP_DPONLY:
> + case MODE_DFP_USB2DP:
> + tcphy_phy_init(tcphy);
> + tcphy_dp_init(tcphy);
> + tcphy_dp_hpd(tcphy, 1);
> + break;
> + case MODE_DFP_USB3DP:
> + tcphy_phy_init(tcphy);
> + tcphy_usb3_init(tcphy);
> + tcphy_dp_init(tcphy);
> + tcphy_dp_hpd(tcphy, 1);
> + break;
> + }
> +}
> +
> +int tcphy_parse_reg(struct rockchip_typec_phy *tcphy, struct device *dev)
> +{
> + struct tcphy_grf_reg *exregs = &tcphy->exregs;
> + struct device_node *np = dev->of_node;
> + u32 len = 0, array[3];
> + int ret = 0;
> +
> + PARSE_GRF_REG(con0);
> + PARSE_GRF_REG(con1);
> + PARSE_GRF_REG(con2);
> + PARSE_GRF_REG(status0);
> + PARSE_GRF_REG(status1);
> + return ret;
> +}
> +
> +static int rockchip_typec_phy_probe(struct platform_device *pdev)
> +{
> + struct device *dev = &pdev->dev;
> + struct rockchip_typec_phy *tcphy;
> + struct resource *res;
> + struct phy_provider *phy_provider;
> +
> + tcphy = devm_kzalloc(dev, sizeof(*tcphy), GFP_KERNEL);
> + if (!tcphy)
> + return -ENOMEM;
> +
> + tcphy->dev = dev;
> + platform_set_drvdata(pdev, tcphy);
> +
> + res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> + tcphy->base = devm_ioremap_resource(dev, res);
> + if (IS_ERR(tcphy->base)) {
> + dev_err(dev, "failed to remap phy regs\n");
> + return PTR_ERR(tcphy->base);
> + }
> + tcphy->grf_regs = syscon_regmap_lookup_by_phandle(dev->of_node,
> + "rockchip,grf");
> + if (IS_ERR(tcphy->grf_regs)) {
> + dev_err(dev, "%s: could not find grf dt node\n", __func__);
> + return PTR_ERR(tcphy->grf_regs);
> + }
> +
> + tcphy->clk_core = of_clk_get_by_name(dev->of_node, "tcpdcore");
> + if (IS_ERR(tcphy->clk_core)) {
> + dev_err(dev, "%s: could not get uphy core clock\n", __func__);
nit: No real need for __func__. That's useful to add in when you
don't have a "dev" pointer and need a "pr_err" to show something that
will help the user find the right line of code.
> + tcphy->clk_core = NULL;
So is tcpdcore optional or required? Bindings doc says "required" and
the "dev_err" above implies required. ...but then you don't return an
error code. That makes it optional. ...but then you use it
unconditional elsewhere in this file. That makes it required.
Summary: return an error here, don't just set to NULL.
> + }
> +
> + tcphy->clk_ref = of_clk_get_by_name(dev->of_node, "tcpdphy_ref");
> + if (IS_ERR(tcphy->clk_core)) {
> + dev_err(dev, "%s: could not get uphy ref clock\n", __func__);
> + tcphy->clk_core = NULL;
"if" test and NULL assignment are for wrong variables.
> + }
> +
> + tcphy->phy_rst = devm_reset_control_get(dev, "tcphy_rst");
> + if (IS_ERR(tcphy->phy_rst)) {
> + dev_err(dev, "no phy_rst reset control found\n");
> + return PTR_ERR(tcphy->phy_rst);
> + }
> +
> + tcphy->pipe_rst = devm_reset_control_get(dev, "tcphy_pipe_rst");
> + if (IS_ERR(tcphy->pipe_rst)) {
> + dev_err(dev, "no pipe_rst reset control found\n");
> + return PTR_ERR(tcphy->pipe_rst);
> + }
> +
> + tcphy->uphy_rst = devm_reset_control_get(dev, "uphy_tcphy_rst");
> + if (IS_ERR(tcphy->uphy_rst)) {
> + dev_err(dev, "no uphy_rst reset control found\n");
> + return PTR_ERR(tcphy->uphy_rst);
> + }
> +
> + tcphy_parse_reg(tcphy, dev);
> + tcphy->mode = MODE_DISCONNECT;
> +
> + tcphy->phy = devm_phy_create(dev, NULL, NULL);
> +
> + phy_set_drvdata(tcphy->phy, tcphy);
> +
> + phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
> +
> + /* register notifier for PD event */
> + ATOMIC_INIT_NOTIFIER_HEAD(&tcphy->notifier);
> + tcphy->event_nb.notifier_call = tcphy_pd_event;
> + INIT_DELAYED_WORK(&tcphy->event_wq, tcphy_event_wq);
> + tcphy_register_notifier(tcphy->phy, &tcphy->event_nb);
> +
> + return PTR_ERR_OR_ZERO(phy_provider);
> +}
> +
> +static int rockchip_typec_phy_remove(struct platform_device *pdev)
> +{
> + return 0;
> +}
I believe that if you've got an empty remove function you can just remove it.
...but doesn't remove need to call tcphy_unregister_notifier?
> +
> +static const struct of_device_id rockchip_typec_phy_dt_ids[] = {
> + { .compatible = "rockchip,rk3399-typec-phy", },
> + {}
> +};
> +
> +MODULE_DEVICE_TABLE(of, rockchip_typec_phy_dt_ids);
> +
> +static struct platform_driver rockchip_typec_phy_driver = {
> + .probe = rockchip_typec_phy_probe,
> + .remove = rockchip_typec_phy_remove,
> + .driver = {
> + .name = "rockchip-typec-phy",
> + .of_match_table = rockchip_typec_phy_dt_ids,
> + },
> +};
> +
> +module_platform_driver(rockchip_typec_phy_driver);
> +
> +MODULE_AUTHOR("Kever Yang<kever.yang@...k-chips.com>");
nit: space before "<"
> +MODULE_AUTHOR("Chris Zhong<zyw@...k-chips.com>");
> +MODULE_DESCRIPTION("Rockchip USB TYPE-C PHY driver");
> +MODULE_LICENSE("GPL v2");
> --
> 2.6.3
>
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