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linux/drivers/phy/freescale/phy-fsl-samsung-hdmi.c
Uwe Kleine-König c49de54c62 phy: freescale: fsl-samsung-hdmi: Convert to platform remove callback returning void 
The .remove() callback for a platform driver returns an int which makes
many driver authors wrongly assume it's possible to do error handling by
returning an error code. However the value returned is ignored (apart
from emitting a warning) and this typically results in resource leaks.

To improve here there is a quest to make the remove callback return
void. In the first step of this quest all drivers are converted to
.remove_new(), which already returns void. Eventually after all drivers
are converted, .remove_new() will be renamed to .remove().

Trivially convert this driver from always returning zero in the remove
callback to the void returning variant.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Link: https://lore.kernel.org/r/20240409161505.66619-2-u.kleine-koenig@pengutronix.de
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2024-04-12 15:18:42 +05:30

719 lines
18 KiB
C
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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright 2020 NXP
* Copyright 2022 Pengutronix, Lucas Stach <kernel@pengutronix.de>
*/
#include <linux/bitfield.h>
#include <linux/bits.h>
#include <linux/clk.h>
#include <linux/clk-provider.h>
#include <linux/delay.h>
#include <linux/iopoll.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#define PHY_REG_00 0x00
#define PHY_REG_01 0x04
#define PHY_REG_02 0x08
#define PHY_REG_08 0x20
#define PHY_REG_09 0x24
#define PHY_REG_10 0x28
#define PHY_REG_11 0x2c
#define PHY_REG_12 0x30
#define REG12_CK_DIV_MASK GENMASK(5, 4)
#define PHY_REG_13 0x34
#define REG13_TG_CODE_LOW_MASK GENMASK(7, 0)
#define PHY_REG_14 0x38
#define REG14_TOL_MASK GENMASK(7, 4)
#define REG14_RP_CODE_MASK GENMASK(3, 1)
#define REG14_TG_CODE_HIGH_MASK GENMASK(0, 0)
#define PHY_REG_15 0x3c
#define PHY_REG_16 0x40
#define PHY_REG_17 0x44
#define PHY_REG_18 0x48
#define PHY_REG_19 0x4c
#define PHY_REG_20 0x50
#define PHY_REG_21 0x54
#define REG21_SEL_TX_CK_INV BIT(7)
#define REG21_PMS_S_MASK GENMASK(3, 0)
#define PHY_REG_22 0x58
#define PHY_REG_23 0x5c
#define PHY_REG_24 0x60
#define PHY_REG_25 0x64
#define PHY_REG_26 0x68
#define PHY_REG_27 0x6c
#define PHY_REG_28 0x70
#define PHY_REG_29 0x74
#define PHY_REG_30 0x78
#define PHY_REG_31 0x7c
#define PHY_REG_32 0x80
/*
* REG33 does not match the ref manual. According to Sandor Yu from NXP,
* "There is a doc issue on the i.MX8MP latest RM"
* REG33 is being used per guidance from Sandor
*/
#define PHY_REG_33 0x84
#define REG33_MODE_SET_DONE BIT(7)
#define REG33_FIX_DA BIT(1)
#define PHY_REG_34 0x88
#define REG34_PHY_READY BIT(7)
#define REG34_PLL_LOCK BIT(6)
#define REG34_PHY_CLK_READY BIT(5)
#define PHY_REG_35 0x8c
#define PHY_REG_36 0x90
#define PHY_REG_37 0x94
#define PHY_REG_38 0x98
#define PHY_REG_39 0x9c
#define PHY_REG_40 0xa0
#define PHY_REG_41 0xa4
#define PHY_REG_42 0xa8
#define PHY_REG_43 0xac
#define PHY_REG_44 0xb0
#define PHY_REG_45 0xb4
#define PHY_REG_46 0xb8
#define PHY_REG_47 0xbc
#define PHY_PLL_DIV_REGS_NUM 6
struct phy_config {
u32 pixclk;
u8 pll_div_regs[PHY_PLL_DIV_REGS_NUM];
};
static const struct phy_config phy_pll_cfg[] = {
{
.pixclk = 22250000,
.pll_div_regs = { 0x4b, 0xf1, 0x89, 0x88, 0x80, 0x40 },
}, {
.pixclk = 23750000,
.pll_div_regs = { 0x50, 0xf1, 0x86, 0x85, 0x80, 0x40 },
}, {
.pixclk = 24000000,
.pll_div_regs = { 0x50, 0xf0, 0x00, 0x00, 0x80, 0x00 },
}, {
.pixclk = 24024000,
.pll_div_regs = { 0x50, 0xf1, 0x99, 0x02, 0x80, 0x40 },
}, {
.pixclk = 25175000,
.pll_div_regs = { 0x54, 0xfc, 0xcc, 0x91, 0x80, 0x40 },
}, {
.pixclk = 25200000,
.pll_div_regs = { 0x54, 0xf0, 0x00, 0x00, 0x80, 0x00 },
}, {
.pixclk = 26750000,
.pll_div_regs = { 0x5a, 0xf2, 0x89, 0x88, 0x80, 0x40 },
}, {
.pixclk = 27000000,
.pll_div_regs = { 0x5a, 0xf0, 0x00, 0x00, 0x80, 0x00 },
}, {
.pixclk = 27027000,
.pll_div_regs = { 0x5a, 0xf2, 0xfd, 0x0c, 0x80, 0x40 },
}, {
.pixclk = 29500000,
.pll_div_regs = { 0x62, 0xf4, 0x95, 0x08, 0x80, 0x40 },
}, {
.pixclk = 30750000,
.pll_div_regs = { 0x66, 0xf4, 0x82, 0x01, 0x88, 0x45 },
}, {
.pixclk = 30888000,
.pll_div_regs = { 0x66, 0xf4, 0x99, 0x18, 0x88, 0x45 },
}, {
.pixclk = 33750000,
.pll_div_regs = { 0x70, 0xf4, 0x82, 0x01, 0x80, 0x40 },
}, {
.pixclk = 35000000,
.pll_div_regs = { 0x58, 0xb8, 0x8b, 0x88, 0x80, 0x40 },
}, {
.pixclk = 36000000,
.pll_div_regs = { 0x5a, 0xb0, 0x00, 0x00, 0x80, 0x00 },
}, {
.pixclk = 36036000,
.pll_div_regs = { 0x5a, 0xb2, 0xfd, 0x0c, 0x80, 0x40 },
}, {
.pixclk = 40000000,
.pll_div_regs = { 0x64, 0xb0, 0x00, 0x00, 0x80, 0x00 },
}, {
.pixclk = 43200000,
.pll_div_regs = { 0x5a, 0x90, 0x00, 0x00, 0x80, 0x00 },
}, {
.pixclk = 43243200,
.pll_div_regs = { 0x5a, 0x92, 0xfd, 0x0c, 0x80, 0x40 },
}, {
.pixclk = 44500000,
.pll_div_regs = { 0x5c, 0x92, 0x98, 0x11, 0x84, 0x41 },
}, {
.pixclk = 47000000,
.pll_div_regs = { 0x62, 0x94, 0x95, 0x82, 0x80, 0x40 },
}, {
.pixclk = 47500000,
.pll_div_regs = { 0x63, 0x96, 0xa1, 0x82, 0x80, 0x40 },
}, {
.pixclk = 50349650,
.pll_div_regs = { 0x54, 0x7c, 0xc3, 0x8f, 0x80, 0x40 },
}, {
.pixclk = 50400000,
.pll_div_regs = { 0x54, 0x70, 0x00, 0x00, 0x80, 0x00 },
}, {
.pixclk = 53250000,
.pll_div_regs = { 0x58, 0x72, 0x84, 0x03, 0x82, 0x41 },
}, {
.pixclk = 53500000,
.pll_div_regs = { 0x5a, 0x72, 0x89, 0x88, 0x80, 0x40 },
}, {
.pixclk = 54000000,
.pll_div_regs = { 0x5a, 0x70, 0x00, 0x00, 0x80, 0x00 },
}, {
.pixclk = 54054000,
.pll_div_regs = { 0x5a, 0x72, 0xfd, 0x0c, 0x80, 0x40 },
}, {
.pixclk = 59000000,
.pll_div_regs = { 0x62, 0x74, 0x95, 0x08, 0x80, 0x40 },
}, {
.pixclk = 59340659,
.pll_div_regs = { 0x62, 0x74, 0xdb, 0x52, 0x88, 0x47 },
}, {
.pixclk = 59400000,
.pll_div_regs = { 0x63, 0x70, 0x00, 0x00, 0x80, 0x00 },
}, {
.pixclk = 61500000,
.pll_div_regs = { 0x66, 0x74, 0x82, 0x01, 0x88, 0x45 },
}, {
.pixclk = 63500000,
.pll_div_regs = { 0x69, 0x74, 0x89, 0x08, 0x80, 0x40 },
}, {
.pixclk = 67500000,
.pll_div_regs = { 0x54, 0x52, 0x87, 0x03, 0x80, 0x40 },
}, {
.pixclk = 70000000,
.pll_div_regs = { 0x58, 0x58, 0x8b, 0x88, 0x80, 0x40 },
}, {
.pixclk = 72000000,
.pll_div_regs = { 0x5a, 0x50, 0x00, 0x00, 0x80, 0x00 },
}, {
.pixclk = 72072000,
.pll_div_regs = { 0x5a, 0x52, 0xfd, 0x0c, 0x80, 0x40 },
}, {
.pixclk = 74176000,
.pll_div_regs = { 0x5d, 0x58, 0xdb, 0xA2, 0x88, 0x41 },
}, {
.pixclk = 74250000,
.pll_div_regs = { 0x5c, 0x52, 0x90, 0x0d, 0x84, 0x41 },
}, {
.pixclk = 78500000,
.pll_div_regs = { 0x62, 0x54, 0x87, 0x01, 0x80, 0x40 },
}, {
.pixclk = 80000000,
.pll_div_regs = { 0x64, 0x50, 0x00, 0x00, 0x80, 0x00 },
}, {
.pixclk = 82000000,
.pll_div_regs = { 0x66, 0x54, 0x82, 0x01, 0x88, 0x45 },
}, {
.pixclk = 82500000,
.pll_div_regs = { 0x67, 0x54, 0x88, 0x01, 0x90, 0x49 },
}, {
.pixclk = 89000000,
.pll_div_regs = { 0x70, 0x54, 0x84, 0x83, 0x80, 0x40 },
}, {
.pixclk = 90000000,
.pll_div_regs = { 0x70, 0x54, 0x82, 0x01, 0x80, 0x40 },
}, {
.pixclk = 94000000,
.pll_div_regs = { 0x4e, 0x32, 0xa7, 0x10, 0x80, 0x40 },
}, {
.pixclk = 95000000,
.pll_div_regs = { 0x50, 0x31, 0x86, 0x85, 0x80, 0x40 },
}, {
.pixclk = 98901099,
.pll_div_regs = { 0x52, 0x3a, 0xdb, 0x4c, 0x88, 0x47 },
}, {
.pixclk = 99000000,
.pll_div_regs = { 0x52, 0x32, 0x82, 0x01, 0x88, 0x47 },
}, {
.pixclk = 100699300,
.pll_div_regs = { 0x54, 0x3c, 0xc3, 0x8f, 0x80, 0x40 },
}, {
.pixclk = 100800000,
.pll_div_regs = { 0x54, 0x30, 0x00, 0x00, 0x80, 0x00 },
}, {
.pixclk = 102500000,
.pll_div_regs = { 0x55, 0x32, 0x8c, 0x05, 0x90, 0x4b },
}, {
.pixclk = 104750000,
.pll_div_regs = { 0x57, 0x32, 0x98, 0x07, 0x90, 0x49 },
}, {
.pixclk = 106500000,
.pll_div_regs = { 0x58, 0x32, 0x84, 0x03, 0x82, 0x41 },
}, {
.pixclk = 107000000,
.pll_div_regs = { 0x5a, 0x32, 0x89, 0x88, 0x80, 0x40 },
}, {
.pixclk = 108000000,
.pll_div_regs = { 0x5a, 0x30, 0x00, 0x00, 0x80, 0x00 },
}, {
.pixclk = 108108000,
.pll_div_regs = { 0x5a, 0x32, 0xfd, 0x0c, 0x80, 0x40 },
}, {
.pixclk = 118000000,
.pll_div_regs = { 0x62, 0x34, 0x95, 0x08, 0x80, 0x40 },
}, {
.pixclk = 118800000,
.pll_div_regs = { 0x63, 0x30, 0x00, 0x00, 0x80, 0x00 },
}, {
.pixclk = 123000000,
.pll_div_regs = { 0x66, 0x34, 0x82, 0x01, 0x88, 0x45 },
}, {
.pixclk = 127000000,
.pll_div_regs = { 0x69, 0x34, 0x89, 0x08, 0x80, 0x40 },
}, {
.pixclk = 135000000,
.pll_div_regs = { 0x70, 0x34, 0x82, 0x01, 0x80, 0x40 },
}, {
.pixclk = 135580000,
.pll_div_regs = { 0x71, 0x39, 0xe9, 0x82, 0x9c, 0x5b },
}, {
.pixclk = 137520000,
.pll_div_regs = { 0x72, 0x38, 0x99, 0x10, 0x85, 0x41 },
}, {
.pixclk = 138750000,
.pll_div_regs = { 0x73, 0x35, 0x88, 0x05, 0x90, 0x4d },
}, {
.pixclk = 140000000,
.pll_div_regs = { 0x75, 0x36, 0xa7, 0x90, 0x80, 0x40 },
}, {
.pixclk = 144000000,
.pll_div_regs = { 0x78, 0x30, 0x00, 0x00, 0x80, 0x00 },
}, {
.pixclk = 148352000,
.pll_div_regs = { 0x7b, 0x35, 0xdb, 0x39, 0x90, 0x45 },
}, {
.pixclk = 148500000,
.pll_div_regs = { 0x7b, 0x35, 0x84, 0x03, 0x90, 0x45 },
}, {
.pixclk = 154000000,
.pll_div_regs = { 0x40, 0x18, 0x83, 0x01, 0x00, 0x40 },
}, {
.pixclk = 157000000,
.pll_div_regs = { 0x41, 0x11, 0xa7, 0x14, 0x80, 0x40 },
}, {
.pixclk = 160000000,
.pll_div_regs = { 0x42, 0x12, 0xa1, 0x20, 0x80, 0x40 },
}, {
.pixclk = 162000000,
.pll_div_regs = { 0x43, 0x18, 0x8b, 0x08, 0x96, 0x55 },
}, {
.pixclk = 164000000,
.pll_div_regs = { 0x45, 0x11, 0x83, 0x82, 0x90, 0x4b },
}, {
.pixclk = 165000000,
.pll_div_regs = { 0x45, 0x11, 0x84, 0x81, 0x90, 0x4b },
}, {
.pixclk = 180000000,
.pll_div_regs = { 0x4b, 0x10, 0x00, 0x00, 0x80, 0x00 },
}, {
.pixclk = 185625000,
.pll_div_regs = { 0x4e, 0x12, 0x9a, 0x95, 0x80, 0x40 },
}, {
.pixclk = 188000000,
.pll_div_regs = { 0x4e, 0x12, 0xa7, 0x10, 0x80, 0x40 },
}, {
.pixclk = 198000000,
.pll_div_regs = { 0x52, 0x12, 0x82, 0x01, 0x88, 0x47 },
}, {
.pixclk = 205000000,
.pll_div_regs = { 0x55, 0x12, 0x8c, 0x05, 0x90, 0x4b },
}, {
.pixclk = 209500000,
.pll_div_regs = { 0x57, 0x12, 0x98, 0x07, 0x90, 0x49 },
}, {
.pixclk = 213000000,
.pll_div_regs = { 0x58, 0x12, 0x84, 0x03, 0x82, 0x41 },
}, {
.pixclk = 216000000,
.pll_div_regs = { 0x5a, 0x10, 0x00, 0x00, 0x80, 0x00 },
}, {
.pixclk = 216216000,
.pll_div_regs = { 0x5a, 0x12, 0xfd, 0x0c, 0x80, 0x40 },
}, {
.pixclk = 237600000,
.pll_div_regs = { 0x63, 0x10, 0x00, 0x00, 0x80, 0x00 },
}, {
.pixclk = 254000000,
.pll_div_regs = { 0x69, 0x14, 0x89, 0x08, 0x80, 0x40 },
}, {
.pixclk = 277500000,
.pll_div_regs = { 0x73, 0x15, 0x88, 0x05, 0x90, 0x4d },
}, {
.pixclk = 288000000,
.pll_div_regs = { 0x78, 0x10, 0x00, 0x00, 0x80, 0x00 },
}, {
.pixclk = 297000000,
.pll_div_regs = { 0x7b, 0x15, 0x84, 0x03, 0x90, 0x45 },
},
};
struct reg_settings {
u8 reg;
u8 val;
};
static const struct reg_settings common_phy_cfg[] = {
{ PHY_REG_00, 0x00 }, { PHY_REG_01, 0xd1 },
{ PHY_REG_08, 0x4f }, { PHY_REG_09, 0x30 },
{ PHY_REG_10, 0x33 }, { PHY_REG_11, 0x65 },
/* REG12 pixclk specific */
/* REG13 pixclk specific */
/* REG14 pixclk specific */
{ PHY_REG_15, 0x80 }, { PHY_REG_16, 0x6c },
{ PHY_REG_17, 0xf2 }, { PHY_REG_18, 0x67 },
{ PHY_REG_19, 0x00 }, { PHY_REG_20, 0x10 },
/* REG21 pixclk specific */
{ PHY_REG_22, 0x30 }, { PHY_REG_23, 0x32 },
{ PHY_REG_24, 0x60 }, { PHY_REG_25, 0x8f },
{ PHY_REG_26, 0x00 }, { PHY_REG_27, 0x00 },
{ PHY_REG_28, 0x08 }, { PHY_REG_29, 0x00 },
{ PHY_REG_30, 0x00 }, { PHY_REG_31, 0x00 },
{ PHY_REG_32, 0x00 }, { PHY_REG_33, 0x80 },
{ PHY_REG_34, 0x00 }, { PHY_REG_35, 0x00 },
{ PHY_REG_36, 0x00 }, { PHY_REG_37, 0x00 },
{ PHY_REG_38, 0x00 }, { PHY_REG_39, 0x00 },
{ PHY_REG_40, 0x00 }, { PHY_REG_41, 0xe0 },
{ PHY_REG_42, 0x83 }, { PHY_REG_43, 0x0f },
{ PHY_REG_44, 0x3E }, { PHY_REG_45, 0xf8 },
{ PHY_REG_46, 0x00 }, { PHY_REG_47, 0x00 }
};
struct fsl_samsung_hdmi_phy {
struct device *dev;
void __iomem *regs;
struct clk *apbclk;
struct clk *refclk;
/* clk provider */
struct clk_hw hw;
const struct phy_config *cur_cfg;
};
static inline struct fsl_samsung_hdmi_phy *
to_fsl_samsung_hdmi_phy(struct clk_hw *hw)
{
return container_of(hw, struct fsl_samsung_hdmi_phy, hw);
}
static void
fsl_samsung_hdmi_phy_configure_pixclk(struct fsl_samsung_hdmi_phy *phy,
const struct phy_config *cfg)
{
u8 div = 0x1;
switch (cfg->pixclk) {
case 22250000 ... 33750000:
div = 0xf;
break;
case 35000000 ... 40000000:
div = 0xb;
break;
case 43200000 ... 47500000:
div = 0x9;
break;
case 50349650 ... 63500000:
div = 0x7;
break;
case 67500000 ... 90000000:
div = 0x5;
break;
case 94000000 ... 148500000:
div = 0x3;
break;
case 154000000 ... 297000000:
div = 0x1;
break;
}
writeb(REG21_SEL_TX_CK_INV | FIELD_PREP(REG21_PMS_S_MASK, div),
phy->regs + PHY_REG_21);
}
static void
fsl_samsung_hdmi_phy_configure_pll_lock_det(struct fsl_samsung_hdmi_phy *phy,
const struct phy_config *cfg)
{
u32 pclk = cfg->pixclk;
u32 fld_tg_code;
u32 pclk_khz;
u8 div = 1;
switch (cfg->pixclk) {
case 22250000 ... 47500000:
div = 1;
break;
case 50349650 ... 99000000:
div = 2;
break;
case 100699300 ... 198000000:
div = 4;
break;
case 205000000 ... 297000000:
div = 8;
break;
}
writeb(FIELD_PREP(REG12_CK_DIV_MASK, ilog2(div)), phy->regs + PHY_REG_12);
/*
* Calculation for the frequency lock detector target code (fld_tg_code)
* is based on reference manual register description of PHY_REG13
* (13.10.3.1.14.2):
* 1st) Calculate int_pllclk which is determinded by FLD_CK_DIV
* 2nd) Increase resolution to avoid rounding issues
* 3th) Do the div (256 / Freq. of int_pllclk) * 24
* 4th) Reduce the resolution and always round up since the NXP
* settings rounding up always too. TODO: Check if that is
* correct.
*/
pclk /= div;
pclk_khz = pclk / 1000;
fld_tg_code = 256 * 1000 * 1000 / pclk_khz * 24;
fld_tg_code = DIV_ROUND_UP(fld_tg_code, 1000);
/* FLD_TOL and FLD_RP_CODE taken from downstream driver */
writeb(FIELD_PREP(REG13_TG_CODE_LOW_MASK, fld_tg_code),
phy->regs + PHY_REG_13);
writeb(FIELD_PREP(REG14_TOL_MASK, 2) |
FIELD_PREP(REG14_RP_CODE_MASK, 2) |
FIELD_PREP(REG14_TG_CODE_HIGH_MASK, fld_tg_code >> 8),
phy->regs + PHY_REG_14);
}
static int fsl_samsung_hdmi_phy_configure(struct fsl_samsung_hdmi_phy *phy,
const struct phy_config *cfg)
{
int i, ret;
u8 val;
/* HDMI PHY init */
writeb(REG33_FIX_DA, phy->regs + PHY_REG_33);
/* common PHY registers */
for (i = 0; i < ARRAY_SIZE(common_phy_cfg); i++)
writeb(common_phy_cfg[i].val, phy->regs + common_phy_cfg[i].reg);
/* set individual PLL registers PHY_REG2 ... PHY_REG7 */
for (i = 0; i < PHY_PLL_DIV_REGS_NUM; i++)
writeb(cfg->pll_div_regs[i], phy->regs + PHY_REG_02 + i * 4);
fsl_samsung_hdmi_phy_configure_pixclk(phy, cfg);
fsl_samsung_hdmi_phy_configure_pll_lock_det(phy, cfg);
writeb(REG33_FIX_DA | REG33_MODE_SET_DONE, phy->regs + PHY_REG_33);
ret = readb_poll_timeout(phy->regs + PHY_REG_34, val,
val & REG34_PLL_LOCK, 50, 20000);
if (ret)
dev_err(phy->dev, "PLL failed to lock\n");
return ret;
}
static unsigned long phy_clk_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
struct fsl_samsung_hdmi_phy *phy = to_fsl_samsung_hdmi_phy(hw);
if (!phy->cur_cfg)
return 74250000;
return phy->cur_cfg->pixclk;
}
static long phy_clk_round_rate(struct clk_hw *hw,
unsigned long rate, unsigned long *parent_rate)
{
int i;
for (i = ARRAY_SIZE(phy_pll_cfg) - 1; i >= 0; i--)
if (phy_pll_cfg[i].pixclk <= rate)
return phy_pll_cfg[i].pixclk;
return -EINVAL;
}
static int phy_clk_set_rate(struct clk_hw *hw,
unsigned long rate, unsigned long parent_rate)
{
struct fsl_samsung_hdmi_phy *phy = to_fsl_samsung_hdmi_phy(hw);
int i;
for (i = ARRAY_SIZE(phy_pll_cfg) - 1; i >= 0; i--)
if (phy_pll_cfg[i].pixclk <= rate)
break;
if (i < 0)
return -EINVAL;
phy->cur_cfg = &phy_pll_cfg[i];
return fsl_samsung_hdmi_phy_configure(phy, phy->cur_cfg);
}
static const struct clk_ops phy_clk_ops = {
.recalc_rate = phy_clk_recalc_rate,
.round_rate = phy_clk_round_rate,
.set_rate = phy_clk_set_rate,
};
static int phy_clk_register(struct fsl_samsung_hdmi_phy *phy)
{
struct device *dev = phy->dev;
struct device_node *np = dev->of_node;
struct clk_init_data init;
const char *parent_name;
struct clk *phyclk;
int ret;
parent_name = __clk_get_name(phy->refclk);
init.parent_names = &parent_name;
init.num_parents = 1;
init.flags = 0;
init.name = "hdmi_pclk";
init.ops = &phy_clk_ops;
phy->hw.init = &init;
phyclk = devm_clk_register(dev, &phy->hw);
if (IS_ERR(phyclk))
return dev_err_probe(dev, PTR_ERR(phyclk),
"failed to register clock\n");
ret = of_clk_add_hw_provider(np, of_clk_hw_simple_get, phyclk);
if (ret)
return dev_err_probe(dev, ret,
"failed to register clock provider\n");
return 0;
}
static int fsl_samsung_hdmi_phy_probe(struct platform_device *pdev)
{
struct fsl_samsung_hdmi_phy *phy;
int ret;
phy = devm_kzalloc(&pdev->dev, sizeof(*phy), GFP_KERNEL);
if (!phy)
return -ENOMEM;
platform_set_drvdata(pdev, phy);
phy->dev = &pdev->dev;
phy->regs = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(phy->regs))
return PTR_ERR(phy->regs);
phy->apbclk = devm_clk_get(phy->dev, "apb");
if (IS_ERR(phy->apbclk))
return dev_err_probe(phy->dev, PTR_ERR(phy->apbclk),
"failed to get apb clk\n");
phy->refclk = devm_clk_get(phy->dev, "ref");
if (IS_ERR(phy->refclk))
return dev_err_probe(phy->dev, PTR_ERR(phy->refclk),
"failed to get ref clk\n");
ret = clk_prepare_enable(phy->apbclk);
if (ret) {
dev_err(phy->dev, "failed to enable apbclk\n");
return ret;
}
pm_runtime_get_noresume(phy->dev);
pm_runtime_set_active(phy->dev);
pm_runtime_enable(phy->dev);
ret = phy_clk_register(phy);
if (ret) {
dev_err(&pdev->dev, "register clk failed\n");
goto register_clk_failed;
}
pm_runtime_put(phy->dev);
return 0;
register_clk_failed:
clk_disable_unprepare(phy->apbclk);
return ret;
}
static void fsl_samsung_hdmi_phy_remove(struct platform_device *pdev)
{
of_clk_del_provider(pdev->dev.of_node);
}
static int __maybe_unused fsl_samsung_hdmi_phy_suspend(struct device *dev)
{
struct fsl_samsung_hdmi_phy *phy = dev_get_drvdata(dev);
clk_disable_unprepare(phy->apbclk);
return 0;
}
static int __maybe_unused fsl_samsung_hdmi_phy_resume(struct device *dev)
{
struct fsl_samsung_hdmi_phy *phy = dev_get_drvdata(dev);
int ret = 0;
ret = clk_prepare_enable(phy->apbclk);
if (ret) {
dev_err(phy->dev, "failed to enable apbclk\n");
return ret;
}
if (phy->cur_cfg)
ret = fsl_samsung_hdmi_phy_configure(phy, phy->cur_cfg);
return ret;
}
static DEFINE_RUNTIME_DEV_PM_OPS(fsl_samsung_hdmi_phy_pm_ops,
fsl_samsung_hdmi_phy_suspend,
fsl_samsung_hdmi_phy_resume, NULL);
static const struct of_device_id fsl_samsung_hdmi_phy_of_match[] = {
{
.compatible = "fsl,imx8mp-hdmi-phy",
}, {
/* sentinel */
}
};
MODULE_DEVICE_TABLE(of, fsl_samsung_hdmi_phy_of_match);
static struct platform_driver fsl_samsung_hdmi_phy_driver = {
.probe = fsl_samsung_hdmi_phy_probe,
.remove_new = fsl_samsung_hdmi_phy_remove,
.driver = {
.name = "fsl-samsung-hdmi-phy",
.of_match_table = fsl_samsung_hdmi_phy_of_match,
.pm = pm_ptr(&fsl_samsung_hdmi_phy_pm_ops),
},
};
module_platform_driver(fsl_samsung_hdmi_phy_driver);
MODULE_AUTHOR("Sandor Yu <Sandor.yu@nxp.com>");
MODULE_DESCRIPTION("SAMSUNG HDMI 2.0 Transmitter PHY Driver");
MODULE_LICENSE("GPL");
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