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20498d52c9
linux/drivers/clk/mediatek/clk-mt6795-pericfg.c
AngeloGioacchino Del Regno 20498d52c9 clk: mediatek: clk-gate: Propagate struct device with mtk_clk_register_gates() 
Commit e4c23e19aa ("clk: mediatek: Register clock gate with device")
introduces a helper function for the sole purpose of propagating a
struct device pointer to the clk API when registering the mtk-gate
clocks to take advantage of Runtime PM when/where needed and where
a power domain is defined in devicetree.

Function mtk_clk_register_gates() then becomes a wrapper around the
new mtk_clk_register_gates_with_dev() function that will simply pass
NULL as struct device: this is essential when registering drivers
with CLK_OF_DECLARE instead of as a platform device, as there will
be no struct device to pass... but we can as well simply have only
one function that always takes such pointer as a param and pass NULL
when unavoidable.

This commit removes the mtk_clk_register_gates() wrapper and renames
mtk_clk_register_gates_with_dev() to the former and all of the calls
to either of the two functions were fixed in all drivers in order to
reflect this change; also, to improve consistency with other kernel
functions, the pointer to struct device was moved as the first param.

Since a lot of MediaTek clock drivers are actually registering as a
platform device, but were still registering the mtk-gate clocks
without passing any struct device to the clock framework, they've
been changed to pass a valid one now, as to make all those platforms
able to use runtime power management where available.

While at it, some much needed indentation changes were also done.

Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: Chen-Yu Tsai <wenst@chromium.org>
Reviewed-by: Markus Schneider-Pargmann <msp@baylibre.com>
Tested-by: Miles Chen <miles.chen@mediatek.com>
Link: https://lore.kernel.org/r/20230120092053.182923-4-angelogioacchino.delregno@collabora.com
Tested-by: Mingming Su <mingming.su@mediatek.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
2023-01-30 16:44:56 -08:00

162 lines
5.2 KiB
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// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2022 Collabora Ltd.
* Author: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
*/
#include <dt-bindings/clock/mediatek,mt6795-clk.h>
#include <dt-bindings/reset/mediatek,mt6795-resets.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include "clk-gate.h"
#include "clk-mtk.h"
#include "reset.h"
#define GATE_PERI(_id, _name, _parent, _shift) \
GATE_MTK(_id, _name, _parent, &peri_cg_regs, \
_shift, &mtk_clk_gate_ops_setclr)
static DEFINE_SPINLOCK(mt6795_peri_clk_lock);
static const struct mtk_gate_regs peri_cg_regs = {
.set_ofs = 0x0008,
.clr_ofs = 0x0010,
.sta_ofs = 0x0018,
};
static const char * const uart_ck_sel_parents[] = {
"clk26m",
"uart_sel",
};
static const struct mtk_composite peri_clks[] = {
MUX(CLK_PERI_UART0_SEL, "uart0_ck_sel", uart_ck_sel_parents, 0x40c, 0, 1),
MUX(CLK_PERI_UART1_SEL, "uart1_ck_sel", uart_ck_sel_parents, 0x40c, 1, 1),
MUX(CLK_PERI_UART2_SEL, "uart2_ck_sel", uart_ck_sel_parents, 0x40c, 2, 1),
MUX(CLK_PERI_UART3_SEL, "uart3_ck_sel", uart_ck_sel_parents, 0x40c, 3, 1),
};
static const struct mtk_gate peri_gates[] = {
GATE_PERI(CLK_PERI_NFI, "peri_nfi", "axi_sel", 0),
GATE_PERI(CLK_PERI_THERM, "peri_therm", "axi_sel", 1),
GATE_PERI(CLK_PERI_PWM1, "peri_pwm1", "axi_sel", 2),
GATE_PERI(CLK_PERI_PWM2, "peri_pwm2", "axi_sel", 3),
GATE_PERI(CLK_PERI_PWM3, "peri_pwm3", "axi_sel", 4),
GATE_PERI(CLK_PERI_PWM4, "peri_pwm4", "axi_sel", 5),
GATE_PERI(CLK_PERI_PWM5, "peri_pwm5", "axi_sel", 6),
GATE_PERI(CLK_PERI_PWM6, "peri_pwm6", "axi_sel", 7),
GATE_PERI(CLK_PERI_PWM7, "peri_pwm7", "axi_sel", 8),
GATE_PERI(CLK_PERI_PWM, "peri_pwm", "axi_sel", 9),
GATE_PERI(CLK_PERI_USB0, "peri_usb0", "usb30_sel", 10),
GATE_PERI(CLK_PERI_USB1, "peri_usb1", "usb20_sel", 11),
GATE_PERI(CLK_PERI_AP_DMA, "peri_ap_dma", "axi_sel", 12),
GATE_PERI(CLK_PERI_MSDC30_0, "peri_msdc30_0", "msdc50_0_sel", 13),
GATE_PERI(CLK_PERI_MSDC30_1, "peri_msdc30_1", "msdc30_1_sel", 14),
GATE_PERI(CLK_PERI_MSDC30_2, "peri_msdc30_2", "msdc30_2_sel", 15),
GATE_PERI(CLK_PERI_MSDC30_3, "peri_msdc30_3", "msdc30_3_sel", 16),
GATE_PERI(CLK_PERI_NLI_ARB, "peri_nli_arb", "axi_sel", 17),
GATE_PERI(CLK_PERI_IRDA, "peri_irda", "irda_sel", 18),
GATE_PERI(CLK_PERI_UART0, "peri_uart0", "axi_sel", 19),
GATE_PERI(CLK_PERI_UART1, "peri_uart1", "axi_sel", 20),
GATE_PERI(CLK_PERI_UART2, "peri_uart2", "axi_sel", 21),
GATE_PERI(CLK_PERI_UART3, "peri_uart3", "axi_sel", 22),
GATE_PERI(CLK_PERI_I2C0, "peri_i2c0", "axi_sel", 23),
GATE_PERI(CLK_PERI_I2C1, "peri_i2c1", "axi_sel", 24),
GATE_PERI(CLK_PERI_I2C2, "peri_i2c2", "axi_sel", 25),
GATE_PERI(CLK_PERI_I2C3, "peri_i2c3", "axi_sel", 26),
GATE_PERI(CLK_PERI_I2C4, "peri_i2c4", "axi_sel", 27),
GATE_PERI(CLK_PERI_AUXADC, "peri_auxadc", "clk26m", 28),
GATE_PERI(CLK_PERI_SPI0, "peri_spi0", "spi_sel", 29),
};
static u16 peri_rst_ofs[] = { 0x0 };
static u16 peri_idx_map[] = {
[MT6795_PERI_NFI_SW_RST] = 14,
[MT6795_PERI_THERM_SW_RST] = 16,
[MT6795_PERI_MSDC1_SW_RST] = 20,
};
static const struct mtk_clk_rst_desc clk_rst_desc = {
.version = MTK_RST_SIMPLE,
.rst_bank_ofs = peri_rst_ofs,
.rst_bank_nr = ARRAY_SIZE(peri_rst_ofs),
.rst_idx_map = peri_idx_map,
.rst_idx_map_nr = ARRAY_SIZE(peri_idx_map),
};
static const struct of_device_id of_match_clk_mt6795_pericfg[] = {
{ .compatible = "mediatek,mt6795-pericfg" },
{ /* sentinel */ }
};
static int clk_mt6795_pericfg_probe(struct platform_device *pdev)
{
struct clk_hw_onecell_data *clk_data;
struct device_node *node = pdev->dev.of_node;
void __iomem *base;
int ret;
base = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(base))
return PTR_ERR(base);
clk_data = mtk_alloc_clk_data(CLK_PERI_NR_CLK);
if (!clk_data)
return -ENOMEM;
ret = mtk_register_reset_controller_with_dev(&pdev->dev, &clk_rst_desc);
if (ret)
goto free_clk_data;
ret = mtk_clk_register_gates(&pdev->dev, node, peri_gates,
ARRAY_SIZE(peri_gates), clk_data);
if (ret)
goto free_clk_data;
ret = mtk_clk_register_composites(peri_clks, ARRAY_SIZE(peri_clks), base,
&mt6795_peri_clk_lock, clk_data);
if (ret)
goto unregister_gates;
ret = of_clk_add_hw_provider(node, of_clk_hw_onecell_get, clk_data);
if (ret)
goto unregister_composites;
return 0;
unregister_composites:
mtk_clk_unregister_composites(peri_clks, ARRAY_SIZE(peri_clks), clk_data);
unregister_gates:
mtk_clk_unregister_gates(peri_gates, ARRAY_SIZE(peri_gates), clk_data);
free_clk_data:
mtk_free_clk_data(clk_data);
return ret;
}
static int clk_mt6795_pericfg_remove(struct platform_device *pdev)
{
struct device_node *node = pdev->dev.of_node;
struct clk_hw_onecell_data *clk_data = platform_get_drvdata(pdev);
of_clk_del_provider(node);
mtk_clk_unregister_composites(peri_clks, ARRAY_SIZE(peri_clks), clk_data);
mtk_clk_unregister_gates(peri_gates, ARRAY_SIZE(peri_gates), clk_data);
mtk_free_clk_data(clk_data);
return 0;
}
static struct platform_driver clk_mt6795_pericfg_drv = {
.driver = {
.name = "clk-mt6795-pericfg",
.of_match_table = of_match_clk_mt6795_pericfg,
},
.probe = clk_mt6795_pericfg_probe,
.remove = clk_mt6795_pericfg_remove,
};
module_platform_driver(clk_mt6795_pericfg_drv);
MODULE_DESCRIPTION("MediaTek MT6795 pericfg clocks driver");
MODULE_LICENSE("GPL");
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