microsoft
/
WSL2-Linux-Kernel
зеркало из https://github.com/microsoft/WSL2-Linux-Kernel.git
1
0
Форкнуть 0
Код Задачи Пакеты Проекты Релизы Вики Активность
WSL2-Linux-Kernel/drivers/clk/xilinx/xlnx_vcu.c

744 строки
19 KiB
C
Исходник Ответственный История

// SPDX-License-Identifier: GPL-2.0
/*
* Xilinx VCU Init
*
* Copyright (C) 2016 - 2017 Xilinx, Inc.
*
* Contacts Dhaval Shah <dshah@xilinx.com>
*/
#include <linux/bitfield.h>
#include <linux/clk.h>
#include <linux/clk-provider.h>
#include <linux/device.h>
#include <linux/errno.h>
#include <linux/io.h>
#include <linux/mfd/syscon.h>
#include <linux/mfd/syscon/xlnx-vcu.h>
#include <linux/module.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <dt-bindings/clock/xlnx-vcu.h>
#define VCU_PLL_CTRL 0x24
#define VCU_PLL_CTRL_RESET BIT(0)
#define VCU_PLL_CTRL_POR_IN BIT(1)
#define VCU_PLL_CTRL_PWR_POR BIT(2)
#define VCU_PLL_CTRL_BYPASS BIT(3)
#define VCU_PLL_CTRL_FBDIV GENMASK(14, 8)
#define VCU_PLL_CTRL_CLKOUTDIV GENMASK(18, 16)
#define VCU_PLL_CFG 0x28
#define VCU_PLL_CFG_RES GENMASK(3, 0)
#define VCU_PLL_CFG_CP GENMASK(8, 5)
#define VCU_PLL_CFG_LFHF GENMASK(12, 10)
#define VCU_PLL_CFG_LOCK_CNT GENMASK(22, 13)
#define VCU_PLL_CFG_LOCK_DLY GENMASK(31, 25)
#define VCU_ENC_CORE_CTRL 0x30
#define VCU_ENC_MCU_CTRL 0x34
#define VCU_DEC_CORE_CTRL 0x38
#define VCU_DEC_MCU_CTRL 0x3c
#define VCU_PLL_STATUS 0x60
#define VCU_PLL_STATUS_LOCK_STATUS BIT(0)
#define MHZ 1000000
#define FVCO_MIN (1500U * MHZ)
#define FVCO_MAX (3000U * MHZ)
/**
* struct xvcu_device - Xilinx VCU init device structure
* @dev: Platform device
* @pll_ref: pll ref clock source
* @aclk: axi clock source
* @logicore_reg_ba: logicore reg base address
* @vcu_slcr_ba: vcu_slcr Register base address
* @pll: handle for the VCU PLL
* @pll_post: handle for the VCU PLL post divider
* @clk_data: clocks provided by the vcu clock provider
*/
struct xvcu_device {
struct device *dev;
struct clk *pll_ref;
struct clk *aclk;
struct regmap *logicore_reg_ba;
void __iomem *vcu_slcr_ba;
struct clk_hw *pll;
struct clk_hw *pll_post;
struct clk_hw_onecell_data *clk_data;
};
static struct regmap_config vcu_settings_regmap_config = {
.name = "regmap",
.reg_bits = 32,
.val_bits = 32,
.reg_stride = 4,
.max_register = 0xfff,
.cache_type = REGCACHE_NONE,
};
/**
* struct xvcu_pll_cfg - Helper data
* @fbdiv: The integer portion of the feedback divider to the PLL
* @cp: PLL charge pump control
* @res: PLL loop filter resistor control
* @lfhf: PLL loop filter high frequency capacitor control
* @lock_dly: Lock circuit configuration settings for lock windowsize
* @lock_cnt: Lock circuit counter setting
*/
struct xvcu_pll_cfg {
u32 fbdiv;
u32 cp;
u32 res;
u32 lfhf;
u32 lock_dly;
u32 lock_cnt;
};
static const struct xvcu_pll_cfg xvcu_pll_cfg[] = {
{ 25, 3, 10, 3, 63, 1000 },
{ 26, 3, 10, 3, 63, 1000 },
{ 27, 4, 6, 3, 63, 1000 },
{ 28, 4, 6, 3, 63, 1000 },
{ 29, 4, 6, 3, 63, 1000 },
{ 30, 4, 6, 3, 63, 1000 },
{ 31, 6, 1, 3, 63, 1000 },
{ 32, 6, 1, 3, 63, 1000 },
{ 33, 4, 10, 3, 63, 1000 },
{ 34, 5, 6, 3, 63, 1000 },
{ 35, 5, 6, 3, 63, 1000 },
{ 36, 5, 6, 3, 63, 1000 },
{ 37, 5, 6, 3, 63, 1000 },
{ 38, 5, 6, 3, 63, 975 },
{ 39, 3, 12, 3, 63, 950 },
{ 40, 3, 12, 3, 63, 925 },
{ 41, 3, 12, 3, 63, 900 },
{ 42, 3, 12, 3, 63, 875 },
{ 43, 3, 12, 3, 63, 850 },
{ 44, 3, 12, 3, 63, 850 },
{ 45, 3, 12, 3, 63, 825 },
{ 46, 3, 12, 3, 63, 800 },
{ 47, 3, 12, 3, 63, 775 },
{ 48, 3, 12, 3, 63, 775 },
{ 49, 3, 12, 3, 63, 750 },
{ 50, 3, 12, 3, 63, 750 },
{ 51, 3, 2, 3, 63, 725 },
{ 52, 3, 2, 3, 63, 700 },
{ 53, 3, 2, 3, 63, 700 },
{ 54, 3, 2, 3, 63, 675 },
{ 55, 3, 2, 3, 63, 675 },
{ 56, 3, 2, 3, 63, 650 },
{ 57, 3, 2, 3, 63, 650 },
{ 58, 3, 2, 3, 63, 625 },
{ 59, 3, 2, 3, 63, 625 },
{ 60, 3, 2, 3, 63, 625 },
{ 61, 3, 2, 3, 63, 600 },
{ 62, 3, 2, 3, 63, 600 },
{ 63, 3, 2, 3, 63, 600 },
{ 64, 3, 2, 3, 63, 600 },
{ 65, 3, 2, 3, 63, 600 },
{ 66, 3, 2, 3, 63, 600 },
{ 67, 3, 2, 3, 63, 600 },
{ 68, 3, 2, 3, 63, 600 },
{ 69, 3, 2, 3, 63, 600 },
{ 70, 3, 2, 3, 63, 600 },
{ 71, 3, 2, 3, 63, 600 },
{ 72, 3, 2, 3, 63, 600 },
{ 73, 3, 2, 3, 63, 600 },
{ 74, 3, 2, 3, 63, 600 },
{ 75, 3, 2, 3, 63, 600 },
{ 76, 3, 2, 3, 63, 600 },
{ 77, 3, 2, 3, 63, 600 },
{ 78, 3, 2, 3, 63, 600 },
{ 79, 3, 2, 3, 63, 600 },
{ 80, 3, 2, 3, 63, 600 },
{ 81, 3, 2, 3, 63, 600 },
{ 82, 3, 2, 3, 63, 600 },
{ 83, 4, 2, 3, 63, 600 },
{ 84, 4, 2, 3, 63, 600 },
{ 85, 4, 2, 3, 63, 600 },
{ 86, 4, 2, 3, 63, 600 },
{ 87, 4, 2, 3, 63, 600 },
{ 88, 4, 2, 3, 63, 600 },
{ 89, 4, 2, 3, 63, 600 },
{ 90, 4, 2, 3, 63, 600 },
{ 91, 4, 2, 3, 63, 600 },
{ 92, 4, 2, 3, 63, 600 },
{ 93, 4, 2, 3, 63, 600 },
{ 94, 4, 2, 3, 63, 600 },
{ 95, 4, 2, 3, 63, 600 },
{ 96, 4, 2, 3, 63, 600 },
{ 97, 4, 2, 3, 63, 600 },
{ 98, 4, 2, 3, 63, 600 },
{ 99, 4, 2, 3, 63, 600 },
{ 100, 4, 2, 3, 63, 600 },
{ 101, 4, 2, 3, 63, 600 },
{ 102, 4, 2, 3, 63, 600 },
{ 103, 5, 2, 3, 63, 600 },
{ 104, 5, 2, 3, 63, 600 },
{ 105, 5, 2, 3, 63, 600 },
{ 106, 5, 2, 3, 63, 600 },
{ 107, 3, 4, 3, 63, 600 },
{ 108, 3, 4, 3, 63, 600 },
{ 109, 3, 4, 3, 63, 600 },
{ 110, 3, 4, 3, 63, 600 },
{ 111, 3, 4, 3, 63, 600 },
{ 112, 3, 4, 3, 63, 600 },
{ 113, 3, 4, 3, 63, 600 },
{ 114, 3, 4, 3, 63, 600 },
{ 115, 3, 4, 3, 63, 600 },
{ 116, 3, 4, 3, 63, 600 },
{ 117, 3, 4, 3, 63, 600 },
{ 118, 3, 4, 3, 63, 600 },
{ 119, 3, 4, 3, 63, 600 },
{ 120, 3, 4, 3, 63, 600 },
{ 121, 3, 4, 3, 63, 600 },
{ 122, 3, 4, 3, 63, 600 },
{ 123, 3, 4, 3, 63, 600 },
{ 124, 3, 4, 3, 63, 600 },
{ 125, 3, 4, 3, 63, 600 },
};
/**
* xvcu_read - Read from the VCU register space
* @iomem: vcu reg space base address
* @offset: vcu reg offset from base
*
* Return: Returns 32bit value from VCU register specified
*
*/
static inline u32 xvcu_read(void __iomem *iomem, u32 offset)
{
return ioread32(iomem + offset);
}
/**
* xvcu_write - Write to the VCU register space
* @iomem: vcu reg space base address
* @offset: vcu reg offset from base
* @value: Value to write
*/
static inline void xvcu_write(void __iomem *iomem, u32 offset, u32 value)
{
iowrite32(value, iomem + offset);
}
#define to_vcu_pll(_hw) container_of(_hw, struct vcu_pll, hw)
struct vcu_pll {
struct clk_hw hw;
void __iomem *reg_base;
unsigned long fvco_min;
unsigned long fvco_max;
};
static int xvcu_pll_wait_for_lock(struct vcu_pll *pll)
{
void __iomem *base = pll->reg_base;
unsigned long timeout;
u32 lock_status;
timeout = jiffies + msecs_to_jiffies(2000);
do {
lock_status = xvcu_read(base, VCU_PLL_STATUS);
if (lock_status & VCU_PLL_STATUS_LOCK_STATUS)
return 0;
} while (!time_after(jiffies, timeout));
return -ETIMEDOUT;
}
static struct clk_hw *xvcu_register_pll_post(struct device *dev,
const char *name,
const struct clk_hw *parent_hw,
void __iomem *reg_base)
{
u32 div;
u32 vcu_pll_ctrl;
/*
* The output divider of the PLL must be set to 1/2 to meet the
* timing in the design.
*/
vcu_pll_ctrl = xvcu_read(reg_base, VCU_PLL_CTRL);
div = FIELD_GET(VCU_PLL_CTRL_CLKOUTDIV, vcu_pll_ctrl);
if (div != 1)
return ERR_PTR(-EINVAL);
return clk_hw_register_fixed_factor(dev, "vcu_pll_post",
clk_hw_get_name(parent_hw),
CLK_SET_RATE_PARENT, 1, 2);
}
static const struct xvcu_pll_cfg *xvcu_find_cfg(int div)
{
const struct xvcu_pll_cfg *cfg = NULL;
unsigned int i;
for (i = 0; i < ARRAY_SIZE(xvcu_pll_cfg) - 1; i++)
if (xvcu_pll_cfg[i].fbdiv == div)
cfg = &xvcu_pll_cfg[i];
return cfg;
}
static int xvcu_pll_set_div(struct vcu_pll *pll, int div)
{
void __iomem *base = pll->reg_base;
const struct xvcu_pll_cfg *cfg = NULL;
u32 vcu_pll_ctrl;
u32 cfg_val;
cfg = xvcu_find_cfg(div);
if (!cfg)
return -EINVAL;
vcu_pll_ctrl = xvcu_read(base, VCU_PLL_CTRL);
vcu_pll_ctrl &= ~VCU_PLL_CTRL_FBDIV;
vcu_pll_ctrl |= FIELD_PREP(VCU_PLL_CTRL_FBDIV, cfg->fbdiv);
xvcu_write(base, VCU_PLL_CTRL, vcu_pll_ctrl);
cfg_val = FIELD_PREP(VCU_PLL_CFG_RES, cfg->res) |
FIELD_PREP(VCU_PLL_CFG_CP, cfg->cp) |
FIELD_PREP(VCU_PLL_CFG_LFHF, cfg->lfhf) |
FIELD_PREP(VCU_PLL_CFG_LOCK_CNT, cfg->lock_cnt) |
FIELD_PREP(VCU_PLL_CFG_LOCK_DLY, cfg->lock_dly);
xvcu_write(base, VCU_PLL_CFG, cfg_val);
return 0;
}
static long xvcu_pll_round_rate(struct clk_hw *hw,
unsigned long rate, unsigned long *parent_rate)
{
struct vcu_pll *pll = to_vcu_pll(hw);
unsigned int feedback_div;
rate = clamp_t(unsigned long, rate, pll->fvco_min, pll->fvco_max);
feedback_div = DIV_ROUND_CLOSEST_ULL(rate, *parent_rate);
feedback_div = clamp_t(unsigned int, feedback_div, 25, 125);
return *parent_rate * feedback_div;
}
static unsigned long xvcu_pll_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
struct vcu_pll *pll = to_vcu_pll(hw);
void __iomem *base = pll->reg_base;
unsigned int div;
u32 vcu_pll_ctrl;
vcu_pll_ctrl = xvcu_read(base, VCU_PLL_CTRL);
div = FIELD_GET(VCU_PLL_CTRL_FBDIV, vcu_pll_ctrl);
return div * parent_rate;
}
static int xvcu_pll_set_rate(struct clk_hw *hw,
unsigned long rate, unsigned long parent_rate)
{
struct vcu_pll *pll = to_vcu_pll(hw);
return xvcu_pll_set_div(pll, rate / parent_rate);
}
static int xvcu_pll_enable(struct clk_hw *hw)
{
struct vcu_pll *pll = to_vcu_pll(hw);
void __iomem *base = pll->reg_base;
u32 vcu_pll_ctrl;
int ret;
vcu_pll_ctrl = xvcu_read(base, VCU_PLL_CTRL);
vcu_pll_ctrl |= VCU_PLL_CTRL_BYPASS;
xvcu_write(base, VCU_PLL_CTRL, vcu_pll_ctrl);
vcu_pll_ctrl = xvcu_read(base, VCU_PLL_CTRL);
vcu_pll_ctrl &= ~VCU_PLL_CTRL_POR_IN;
vcu_pll_ctrl &= ~VCU_PLL_CTRL_PWR_POR;
vcu_pll_ctrl &= ~VCU_PLL_CTRL_RESET;
xvcu_write(base, VCU_PLL_CTRL, vcu_pll_ctrl);
ret = xvcu_pll_wait_for_lock(pll);
if (ret) {
pr_err("VCU PLL is not locked\n");
goto err;
}
vcu_pll_ctrl = xvcu_read(base, VCU_PLL_CTRL);
vcu_pll_ctrl &= ~VCU_PLL_CTRL_BYPASS;
xvcu_write(base, VCU_PLL_CTRL, vcu_pll_ctrl);
err:
return ret;
}
static void xvcu_pll_disable(struct clk_hw *hw)
{
struct vcu_pll *pll = to_vcu_pll(hw);
void __iomem *base = pll->reg_base;
u32 vcu_pll_ctrl;
vcu_pll_ctrl = xvcu_read(base, VCU_PLL_CTRL);
vcu_pll_ctrl |= VCU_PLL_CTRL_POR_IN;
vcu_pll_ctrl |= VCU_PLL_CTRL_PWR_POR;
vcu_pll_ctrl |= VCU_PLL_CTRL_RESET;
xvcu_write(base, VCU_PLL_CTRL, vcu_pll_ctrl);
}
static const struct clk_ops vcu_pll_ops = {
.enable = xvcu_pll_enable,
.disable = xvcu_pll_disable,
.round_rate = xvcu_pll_round_rate,
.recalc_rate = xvcu_pll_recalc_rate,
.set_rate = xvcu_pll_set_rate,
};
static struct clk_hw *xvcu_register_pll(struct device *dev,
void __iomem *reg_base,
const char *name, const char *parent,
unsigned long flags)
{
struct vcu_pll *pll;
struct clk_hw *hw;
struct clk_init_data init;
int ret;
init.name = name;
init.parent_names = &parent;
init.ops = &vcu_pll_ops;
init.num_parents = 1;
init.flags = flags;
pll = devm_kmalloc(dev, sizeof(*pll), GFP_KERNEL);
if (!pll)
return ERR_PTR(-ENOMEM);
pll->hw.init = &init;
pll->reg_base = reg_base;
pll->fvco_min = FVCO_MIN;
pll->fvco_max = FVCO_MAX;
hw = &pll->hw;
ret = devm_clk_hw_register(dev, hw);
if (ret)
return ERR_PTR(ret);
clk_hw_set_rate_range(hw, pll->fvco_min, pll->fvco_max);
return hw;
}
static struct clk_hw *xvcu_clk_hw_register_leaf(struct device *dev,
const char *name,
const struct clk_parent_data *parent_data,
u8 num_parents,
void __iomem *reg)
{
u8 mux_flags = CLK_MUX_ROUND_CLOSEST;
u8 divider_flags = CLK_DIVIDER_ONE_BASED | CLK_DIVIDER_ALLOW_ZERO |
CLK_DIVIDER_ROUND_CLOSEST;
struct clk_hw *mux = NULL;
struct clk_hw *divider = NULL;
struct clk_hw *gate = NULL;
char *name_mux;
char *name_div;
int err;
/* Protect register shared by clocks */
spinlock_t *lock;
lock = devm_kzalloc(dev, sizeof(*lock), GFP_KERNEL);
if (!lock)
return ERR_PTR(-ENOMEM);
spin_lock_init(lock);
name_mux = devm_kasprintf(dev, GFP_KERNEL, "%s%s", name, "_mux");
if (!name_mux)
return ERR_PTR(-ENOMEM);
mux = clk_hw_register_mux_parent_data(dev, name_mux,
parent_data, num_parents,
CLK_SET_RATE_PARENT,
reg, 0, 1, mux_flags, lock);
if (IS_ERR(mux))
return mux;
name_div = devm_kasprintf(dev, GFP_KERNEL, "%s%s", name, "_div");
if (!name_div) {
err = -ENOMEM;
goto unregister_mux;
}
divider = clk_hw_register_divider_parent_hw(dev, name_div, mux,
CLK_SET_RATE_PARENT,
reg, 4, 6, divider_flags,
lock);
if (IS_ERR(divider)) {
err = PTR_ERR(divider);
goto unregister_mux;
}
gate = clk_hw_register_gate_parent_hw(dev, name, divider,
CLK_SET_RATE_PARENT, reg, 12, 0,
lock);
if (IS_ERR(gate)) {
err = PTR_ERR(gate);
goto unregister_divider;
}
return gate;
unregister_divider:
clk_hw_unregister_divider(divider);
unregister_mux:
clk_hw_unregister_mux(mux);
return ERR_PTR(err);
}
static void xvcu_clk_hw_unregister_leaf(struct clk_hw *hw)
{
struct clk_hw *gate = hw;
struct clk_hw *divider;
struct clk_hw *mux;
if (!gate)
return;
divider = clk_hw_get_parent(gate);
clk_hw_unregister_gate(gate);
if (!divider)
return;
mux = clk_hw_get_parent(divider);
clk_hw_unregister_mux(mux);
if (!divider)
return;
clk_hw_unregister_divider(divider);
}
static int xvcu_register_clock_provider(struct xvcu_device *xvcu)
{
struct device *dev = xvcu->dev;
struct clk_parent_data parent_data[2] = { 0 };
struct clk_hw_onecell_data *data;
struct clk_hw **hws;
struct clk_hw *hw;
void __iomem *reg_base = xvcu->vcu_slcr_ba;
data = devm_kzalloc(dev, struct_size(data, hws, CLK_XVCU_NUM_CLOCKS), GFP_KERNEL);
if (!data)
return -ENOMEM;
data->num = CLK_XVCU_NUM_CLOCKS;
hws = data->hws;
xvcu->clk_data = data;
hw = xvcu_register_pll(dev, reg_base,
"vcu_pll", __clk_get_name(xvcu->pll_ref),
CLK_SET_RATE_NO_REPARENT | CLK_OPS_PARENT_ENABLE);
if (IS_ERR(hw))
return PTR_ERR(hw);
xvcu->pll = hw;
hw = xvcu_register_pll_post(dev, "vcu_pll_post", xvcu->pll, reg_base);
if (IS_ERR(hw))
return PTR_ERR(hw);
xvcu->pll_post = hw;
parent_data[0].fw_name = "pll_ref";
parent_data[1].hw = xvcu->pll_post;
hws[CLK_XVCU_ENC_CORE] =
xvcu_clk_hw_register_leaf(dev, "venc_core_clk",
parent_data,
ARRAY_SIZE(parent_data),
reg_base + VCU_ENC_CORE_CTRL);
hws[CLK_XVCU_ENC_MCU] =
xvcu_clk_hw_register_leaf(dev, "venc_mcu_clk",
parent_data,
ARRAY_SIZE(parent_data),
reg_base + VCU_ENC_MCU_CTRL);
hws[CLK_XVCU_DEC_CORE] =
xvcu_clk_hw_register_leaf(dev, "vdec_core_clk",
parent_data,
ARRAY_SIZE(parent_data),
reg_base + VCU_DEC_CORE_CTRL);
hws[CLK_XVCU_DEC_MCU] =
xvcu_clk_hw_register_leaf(dev, "vdec_mcu_clk",
parent_data,
ARRAY_SIZE(parent_data),
reg_base + VCU_DEC_MCU_CTRL);
return devm_of_clk_add_hw_provider(dev, of_clk_hw_onecell_get, data);
}
static void xvcu_unregister_clock_provider(struct xvcu_device *xvcu)
{
struct clk_hw_onecell_data *data = xvcu->clk_data;
struct clk_hw **hws = data->hws;
if (!IS_ERR_OR_NULL(hws[CLK_XVCU_DEC_MCU]))
xvcu_clk_hw_unregister_leaf(hws[CLK_XVCU_DEC_MCU]);
if (!IS_ERR_OR_NULL(hws[CLK_XVCU_DEC_CORE]))
xvcu_clk_hw_unregister_leaf(hws[CLK_XVCU_DEC_CORE]);
if (!IS_ERR_OR_NULL(hws[CLK_XVCU_ENC_MCU]))
xvcu_clk_hw_unregister_leaf(hws[CLK_XVCU_ENC_MCU]);
if (!IS_ERR_OR_NULL(hws[CLK_XVCU_ENC_CORE]))
xvcu_clk_hw_unregister_leaf(hws[CLK_XVCU_ENC_CORE]);
clk_hw_unregister_fixed_factor(xvcu->pll_post);
}
/**
* xvcu_probe - Probe existence of the logicoreIP
* and initialize PLL
*
* @pdev: Pointer to the platform_device structure
*
* Return: Returns 0 on success
* Negative error code otherwise
*/
static int xvcu_probe(struct platform_device *pdev)
{
struct resource *res;
struct xvcu_device *xvcu;
void __iomem *regs;
int ret;
xvcu = devm_kzalloc(&pdev->dev, sizeof(*xvcu), GFP_KERNEL);
if (!xvcu)
return -ENOMEM;
xvcu->dev = &pdev->dev;
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "vcu_slcr");
if (!res) {
dev_err(&pdev->dev, "get vcu_slcr memory resource failed.\n");
return -ENODEV;
}
xvcu->vcu_slcr_ba = devm_ioremap(&pdev->dev, res->start,
resource_size(res));
if (!xvcu->vcu_slcr_ba) {
dev_err(&pdev->dev, "vcu_slcr register mapping failed.\n");
return -ENOMEM;
}
xvcu->logicore_reg_ba =
syscon_regmap_lookup_by_compatible("xlnx,vcu-settings");
if (IS_ERR(xvcu->logicore_reg_ba)) {
dev_info(&pdev->dev,
"could not find xlnx,vcu-settings: trying direct register access\n");
res = platform_get_resource_byname(pdev,
IORESOURCE_MEM, "logicore");
if (!res) {
dev_err(&pdev->dev, "get logicore memory resource failed.\n");
return -ENODEV;
}
regs = devm_ioremap(&pdev->dev, res->start, resource_size(res));
if (!regs) {
dev_err(&pdev->dev, "logicore register mapping failed.\n");
return -ENOMEM;
}
xvcu->logicore_reg_ba =
devm_regmap_init_mmio(&pdev->dev, regs,
&vcu_settings_regmap_config);
if (IS_ERR(xvcu->logicore_reg_ba)) {
dev_err(&pdev->dev, "failed to init regmap\n");
return PTR_ERR(xvcu->logicore_reg_ba);
}
}
xvcu->aclk = devm_clk_get(&pdev->dev, "aclk");
if (IS_ERR(xvcu->aclk)) {
dev_err(&pdev->dev, "Could not get aclk clock\n");
return PTR_ERR(xvcu->aclk);
}
xvcu->pll_ref = devm_clk_get(&pdev->dev, "pll_ref");
if (IS_ERR(xvcu->pll_ref)) {
dev_err(&pdev->dev, "Could not get pll_ref clock\n");
return PTR_ERR(xvcu->pll_ref);
}
ret = clk_prepare_enable(xvcu->aclk);
if (ret) {
dev_err(&pdev->dev, "aclk clock enable failed\n");
return ret;
}
/*
* Do the Gasket isolation and put the VCU out of reset
* Bit 0 : Gasket isolation
* Bit 1 : put VCU out of reset
*/
regmap_write(xvcu->logicore_reg_ba, VCU_GASKET_INIT, VCU_GASKET_VALUE);
ret = xvcu_register_clock_provider(xvcu);
if (ret) {
dev_err(&pdev->dev, "failed to register clock provider\n");
goto error_clk_provider;
}
dev_set_drvdata(&pdev->dev, xvcu);
return 0;
error_clk_provider:
xvcu_unregister_clock_provider(xvcu);
clk_disable_unprepare(xvcu->aclk);
return ret;
}
/**
* xvcu_remove - Insert gasket isolation
* and disable the clock
* @pdev: Pointer to the platform_device structure
*
* Return: Returns 0 on success
* Negative error code otherwise
*/
static int xvcu_remove(struct platform_device *pdev)
{
struct xvcu_device *xvcu;
xvcu = platform_get_drvdata(pdev);
if (!xvcu)
return -ENODEV;
xvcu_unregister_clock_provider(xvcu);
/* Add the Gasket isolation and put the VCU in reset. */
regmap_write(xvcu->logicore_reg_ba, VCU_GASKET_INIT, 0);
clk_disable_unprepare(xvcu->aclk);
return 0;
}
static const struct of_device_id xvcu_of_id_table[] = {
{ .compatible = "xlnx,vcu" },
{ .compatible = "xlnx,vcu-logicoreip-1.0" },
{ }
};
MODULE_DEVICE_TABLE(of, xvcu_of_id_table);
static struct platform_driver xvcu_driver = {
.driver = {
.name = "xilinx-vcu",
.of_match_table = xvcu_of_id_table,
},
.probe = xvcu_probe,
.remove = xvcu_remove,
};
module_platform_driver(xvcu_driver);
MODULE_AUTHOR("Dhaval Shah <dshah@xilinx.com>");
MODULE_DESCRIPTION("Xilinx VCU init Driver");
MODULE_LICENSE("GPL v2");
Ссылка в новой задаче Показать git blame Копировать постоянную ссылку