diff mbox series

[v6,3/3] clk: Add Ingenic JZ4755 CGU driver

Message ID 20221027192024.484320-4-lis8215@gmail.com
State New
Headers
Series Add Ingenic JZ4755 CGU driver |

Commit Message

Siarhei Volkau Oct. 27, 2022, 7:20 p.m. UTC 
  Add support for the clocks provided by the CGU in the Ingenic JZ4755
SoC.

Signed-off-by: Siarhei Volkau <lis8215@gmail.com>
---
 drivers/clk/ingenic/Kconfig      |  10 +
 drivers/clk/ingenic/Makefile     |   1 +
 drivers/clk/ingenic/jz4755-cgu.c | 346 +++++++++++++++++++++++++++++++
 3 files changed, 357 insertions(+)
 create mode 100644 drivers/clk/ingenic/jz4755-cgu.c

Comments

Paul Cercueil Oct. 27, 2022, 8:24 p.m. UTC | #1 
Hi Siarhei,

Le jeu. 27 oct. 2022 à 22:20:23 +0300, Siarhei Volkau 
<lis8215@gmail.com> a écrit :
> Add support for the clocks provided by the CGU in the Ingenic JZ4755
> SoC.
> 
> Signed-off-by: Siarhei Volkau <lis8215@gmail.com>
> ---
>  drivers/clk/ingenic/Kconfig      |  10 +
>  drivers/clk/ingenic/Makefile     |   1 +
>  drivers/clk/ingenic/jz4755-cgu.c | 346 
> +++++++++++++++++++++++++++++++
>  3 files changed, 357 insertions(+)
>  create mode 100644 drivers/clk/ingenic/jz4755-cgu.c
> 
> diff --git a/drivers/clk/ingenic/Kconfig b/drivers/clk/ingenic/Kconfig
> index 898f1bc47..f80ac4f29 100644
> --- a/drivers/clk/ingenic/Kconfig
> +++ b/drivers/clk/ingenic/Kconfig
> @@ -15,6 +15,16 @@ config INGENIC_CGU_JZ4740
> 
>  	  If building for a JZ4740 SoC, you want to say Y here.
> 
> +config INGENIC_CGU_JZ4755
> +	bool "Ingenic JZ4755 CGU driver"
> +	default MACH_JZ4755
> +	select INGENIC_CGU_COMMON
> +	help
> +	  Support the clocks provided by the CGU hardware on Ingenic JZ4755
> +	  and compatible SoCs.
> +
> +	  If building for a JZ4755 SoC, you want to say Y here.
> +
>  config INGENIC_CGU_JZ4725B
>  	bool "Ingenic JZ4725B CGU driver"
>  	default MACH_JZ4725B
> diff --git a/drivers/clk/ingenic/Makefile 
> b/drivers/clk/ingenic/Makefile
> index 9edfaf461..81d8e23c2 100644
> --- a/drivers/clk/ingenic/Makefile
> +++ b/drivers/clk/ingenic/Makefile
> @@ -1,6 +1,7 @@
>  # SPDX-License-Identifier: GPL-2.0-only
>  obj-$(CONFIG_INGENIC_CGU_COMMON)	+= cgu.o pm.o
>  obj-$(CONFIG_INGENIC_CGU_JZ4740)	+= jz4740-cgu.o
> +obj-$(CONFIG_INGENIC_CGU_JZ4755)	+= jz4755-cgu.o
>  obj-$(CONFIG_INGENIC_CGU_JZ4725B)	+= jz4725b-cgu.o
>  obj-$(CONFIG_INGENIC_CGU_JZ4760)	+= jz4760-cgu.o
>  obj-$(CONFIG_INGENIC_CGU_JZ4770)	+= jz4770-cgu.o
> diff --git a/drivers/clk/ingenic/jz4755-cgu.c 
> b/drivers/clk/ingenic/jz4755-cgu.c
> new file mode 100644
> index 000000000..d2eb3ae0c
> --- /dev/null
> +++ b/drivers/clk/ingenic/jz4755-cgu.c
> @@ -0,0 +1,346 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Ingenic JZ4755 SoC CGU driver
> + * Heavily based on JZ4725b CGU driver
> + *
> + * Copyright (C) 2022 Siarhei Volkau
> + * Author: Siarhei Volkau <lis8215@gmail.com>
> + */
> +
> +#include <linux/clk-provider.h>
> +#include <linux/delay.h>
> +#include <linux/of.h>
> +
> +#include <dt-bindings/clock/ingenic,jz4755-cgu.h>
> +
> +#include "cgu.h"
> +#include "pm.h"
> +
> +/* CGU register offsets */
> +#define CGU_REG_CPCCR		0x00
> +#define CGU_REG_LCR		0x04
> +#define CGU_REG_CPPCR		0x10
> +#define CGU_REG_CLKGR		0x20
> +#define CGU_REG_OPCR		0x24
> +#define CGU_REG_I2SCDR		0x60
> +#define CGU_REG_LPCDR		0x64
> +#define CGU_REG_MSCCDR		0x68
> +#define CGU_REG_SSICDR		0x74
> +#define CGU_REG_CIMCDR		0x7C
> +
> +/* bits within the LCR register */
> +#define LCR_SLEEP		BIT(0)

Nitpick: this macro is not used anywhere.

With that fixed:
Reviewed-by: Paul Cercueil <paul@crapouillou.net>

Stephen: you can merge v6 with the unused macro if you want, the same 
unused macro is already in jz4740-cgu.c and jz4725b-cgu.c, so we'll 
have to send a patch to remove these later anyway.

> +
> +static struct ingenic_cgu *cgu;
> +
> +static const s8 pll_od_encoding[4] = {
> +	0x0, 0x1, -1, 0x3,
> +};
> +
> +static const u8 jz4755_cgu_cpccr_div_table[] = {
> +	1, 2, 3, 4, 6, 8,
> +};
> +
> +static const u8 jz4755_cgu_pll_half_div_table[] = {
> +	2, 1,
> +};
> +
> +static const struct ingenic_cgu_clk_info jz4755_cgu_clocks[] = {
> +
> +	/* External clocks */
> +
> +	[JZ4755_CLK_EXT] = { "ext", CGU_CLK_EXT },
> +	[JZ4755_CLK_OSC32K] = { "osc32k", CGU_CLK_EXT },
> +
> +	[JZ4755_CLK_PLL] = {
> +		"pll", CGU_CLK_PLL,
> +		.parents = { JZ4755_CLK_EXT, },
> +		.pll = {
> +			.reg = CGU_REG_CPPCR,
> +			.rate_multiplier = 1,
> +			.m_shift = 23,
> +			.m_bits = 9,
> +			.m_offset = 2,
> +			.n_shift = 18,
> +			.n_bits = 5,
> +			.n_offset = 2,
> +			.od_shift = 16,
> +			.od_bits = 2,
> +			.od_max = 4,
> +			.od_encoding = pll_od_encoding,
> +			.stable_bit = 10,
> +			.bypass_reg = CGU_REG_CPPCR,
> +			.bypass_bit = 9,
> +			.enable_bit = 8,
> +		},
> +	},
> +
> +	/* Muxes & dividers */
> +
> +	[JZ4755_CLK_PLL_HALF] = {
> +		"pll half", CGU_CLK_DIV,
> +		.parents = { JZ4755_CLK_PLL, },
> +		.div = {
> +			CGU_REG_CPCCR, 21, 1, 1, -1, -1, -1, 0,
> +			jz4755_cgu_pll_half_div_table,
> +		},
> +	},
> +
> +	[JZ4755_CLK_EXT_HALF] = {
> +		"ext half", CGU_CLK_DIV,
> +		.parents = { JZ4755_CLK_EXT, },
> +		.div = {
> +			CGU_REG_CPCCR, 30, 1, 1, -1, -1, -1, 0,
> +			NULL,
> +		},
> +	},
> +
> +	[JZ4755_CLK_CCLK] = {
> +		"cclk", CGU_CLK_DIV,
> +		.parents = { JZ4755_CLK_PLL, },
> +		.div = {
> +			CGU_REG_CPCCR, 0, 1, 4, 22, -1, -1, 0,
> +			jz4755_cgu_cpccr_div_table,
> +		},
> +	},
> +
> +	[JZ4755_CLK_H0CLK] = {
> +		"hclk", CGU_CLK_DIV,
> +		.parents = { JZ4755_CLK_PLL, },
> +		.div = {
> +			CGU_REG_CPCCR, 4, 1, 4, 22, -1, -1, 0,
> +			jz4755_cgu_cpccr_div_table,
> +		},
> +	},
> +
> +	[JZ4755_CLK_PCLK] = {
> +		"pclk", CGU_CLK_DIV,
> +		.parents = { JZ4755_CLK_PLL, },
> +		.div = {
> +			CGU_REG_CPCCR, 8, 1, 4, 22, -1, -1, 0,
> +			jz4755_cgu_cpccr_div_table,
> +		},
> +	},
> +
> +	[JZ4755_CLK_MCLK] = {
> +		"mclk", CGU_CLK_DIV,
> +		.parents = { JZ4755_CLK_PLL, },
> +		.div = {
> +			CGU_REG_CPCCR, 12, 1, 4, 22, -1, -1, 0,
> +			jz4755_cgu_cpccr_div_table,
> +		},
> +	},
> +
> +	[JZ4755_CLK_H1CLK] = {
> +		"h1clk", CGU_CLK_DIV,
> +		.parents = { JZ4755_CLK_PLL, },
> +		.div = {
> +			CGU_REG_CPCCR, 16, 1, 4, 22, -1, -1, 0,
> +			jz4755_cgu_cpccr_div_table,
> +		},
> +	},
> +
> +	[JZ4755_CLK_UDC] = {
> +		"udc", CGU_CLK_MUX | CGU_CLK_DIV | CGU_CLK_GATE,
> +		.parents = { JZ4755_CLK_EXT_HALF, JZ4755_CLK_PLL_HALF, },
> +		.mux = { CGU_REG_CPCCR, 29, 1 },
> +		.div = { CGU_REG_CPCCR, 23, 1, 6, -1, -1, -1 },
> +		.gate = { CGU_REG_CLKGR, 10 },
> +	},
> +
> +	[JZ4755_CLK_LCD] = {
> +		"lcd", CGU_CLK_DIV | CGU_CLK_GATE,
> +		.parents = { JZ4755_CLK_PLL_HALF, },
> +		.div = { CGU_REG_LPCDR, 0, 1, 11, -1, -1, -1 },
> +		.gate = { CGU_REG_CLKGR, 9 },
> +	},
> +
> +	[JZ4755_CLK_MMC] = {
> +		"mmc", CGU_CLK_DIV,
> +		.parents = { JZ4755_CLK_PLL_HALF, },
> +		.div = { CGU_REG_MSCCDR, 0, 1, 5, -1, -1, -1 },
> +	},
> +
> +	[JZ4755_CLK_I2S] = {
> +		"i2s", CGU_CLK_MUX | CGU_CLK_DIV,
> +		.parents = { JZ4755_CLK_EXT_HALF, JZ4755_CLK_PLL_HALF, },
> +		.mux = { CGU_REG_CPCCR, 31, 1 },
> +		.div = { CGU_REG_I2SCDR, 0, 1, 9, -1, -1, -1 },
> +	},
> +
> +	[JZ4755_CLK_SPI] = {
> +		"spi", CGU_CLK_DIV | CGU_CLK_GATE,
> +		.parents = { JZ4755_CLK_PLL_HALF, },
> +		.div = { CGU_REG_SSICDR, 0, 1, 4, -1, -1, -1 },
> +		.gate = { CGU_REG_CLKGR, 4 },
> +	},
> +
> +	[JZ4755_CLK_TVE] = {
> +		"tve", CGU_CLK_MUX | CGU_CLK_GATE,
> +		.parents = { JZ4755_CLK_LCD, JZ4755_CLK_EXT, },
> +		.mux = { CGU_REG_LPCDR, 31, 1 },
> +		.gate = { CGU_REG_CLKGR, 18 },
> +	},
> +
> +	[JZ4755_CLK_RTC] = {
> +		"rtc", CGU_CLK_MUX | CGU_CLK_GATE,
> +		.parents = { JZ4755_CLK_EXT512, JZ4755_CLK_OSC32K, },
> +		.mux = { CGU_REG_OPCR, 2, 1},
> +		.gate = { CGU_REG_CLKGR, 2 },
> +	},
> +
> +	[JZ4755_CLK_CIM] = {
> +		"cim", CGU_CLK_DIV | CGU_CLK_GATE,
> +		.parents = { JZ4755_CLK_PLL_HALF, },
> +		.div = { CGU_REG_CIMCDR, 0, 1, 8, -1, -1, -1 },
> +		.gate = { CGU_REG_CLKGR, 8 },
> +	},
> +
> +	/* Gate-only clocks */
> +
> +	[JZ4755_CLK_UART0] = {
> +		"uart0", CGU_CLK_GATE,
> +		.parents = { JZ4755_CLK_EXT_HALF, },
> +		.gate = { CGU_REG_CLKGR, 0 },
> +	},
> +
> +	[JZ4755_CLK_UART1] = {
> +		"uart1", CGU_CLK_GATE,
> +		.parents = { JZ4755_CLK_EXT_HALF, },
> +		.gate = { CGU_REG_CLKGR, 14 },
> +	},
> +
> +	[JZ4755_CLK_UART2] = {
> +		"uart2", CGU_CLK_GATE,
> +		.parents = { JZ4755_CLK_EXT_HALF, },
> +		.gate = { CGU_REG_CLKGR, 15 },
> +	},
> +
> +	[JZ4755_CLK_ADC] = {
> +		"adc", CGU_CLK_GATE,
> +		.parents = { JZ4755_CLK_EXT_HALF, },
> +		.gate = { CGU_REG_CLKGR, 7 },
> +	},
> +
> +	[JZ4755_CLK_AIC] = {
> +		"aic", CGU_CLK_GATE,
> +		.parents = { JZ4755_CLK_EXT_HALF, },
> +		.gate = { CGU_REG_CLKGR, 5 },
> +	},
> +
> +	[JZ4755_CLK_I2C] = {
> +		"i2c", CGU_CLK_GATE,
> +		.parents = { JZ4755_CLK_EXT_HALF, },
> +		.gate = { CGU_REG_CLKGR, 3 },
> +	},
> +
> +	[JZ4755_CLK_BCH] = {
> +		"bch", CGU_CLK_GATE,
> +		.parents = { JZ4755_CLK_H1CLK, },
> +		.gate = { CGU_REG_CLKGR, 11 },
> +	},

Just to clear things up vs. what you wrote in your cover letter: 
according to table 30-3 of chapter 30.1 of the PM, BCH is on the AHB1 
bus, so H1CLK is correct.

Cheers,
-Paul

> +
> +	[JZ4755_CLK_TCU] = {
> +		"tcu", CGU_CLK_GATE,
> +		.parents = { JZ4755_CLK_EXT, },
> +		.gate = { CGU_REG_CLKGR, 1 },
> +	},
> +
> +	[JZ4755_CLK_DMA] = {
> +		"dma", CGU_CLK_GATE,
> +		.parents = { JZ4755_CLK_PCLK, },
> +		.gate = { CGU_REG_CLKGR, 12 },
> +	},
> +
> +	[JZ4755_CLK_MMC0] = {
> +		"mmc0", CGU_CLK_GATE,
> +		.parents = { JZ4755_CLK_MMC, },
> +		.gate = { CGU_REG_CLKGR, 6 },
> +	},
> +
> +	[JZ4755_CLK_MMC1] = {
> +		"mmc1", CGU_CLK_GATE,
> +		.parents = { JZ4755_CLK_MMC, },
> +		.gate = { CGU_REG_CLKGR, 16 },
> +	},
> +
> +	[JZ4755_CLK_AUX_CPU] = {
> +		"aux_cpu", CGU_CLK_GATE,
> +		.parents = { JZ4755_CLK_H1CLK, },
> +		.gate = { CGU_REG_CLKGR, 24 },
> +	},
> +
> +	[JZ4755_CLK_AHB1] = {
> +		"ahb1", CGU_CLK_GATE,
> +		.parents = { JZ4755_CLK_H1CLK, },
> +		.gate = { CGU_REG_CLKGR, 23 },
> +	},
> +
> +	[JZ4755_CLK_IDCT] = {
> +		"idct", CGU_CLK_GATE,
> +		.parents = { JZ4755_CLK_H1CLK, },
> +		.gate = { CGU_REG_CLKGR, 22 },
> +	},
> +
> +	[JZ4755_CLK_DB] = {
> +		"db", CGU_CLK_GATE,
> +		.parents = { JZ4755_CLK_H1CLK, },
> +		.gate = { CGU_REG_CLKGR, 21 },
> +	},
> +
> +	[JZ4755_CLK_ME] = {
> +		"me", CGU_CLK_GATE,
> +		.parents = { JZ4755_CLK_H1CLK, },
> +		.gate = { CGU_REG_CLKGR, 20 },
> +	},
> +
> +	[JZ4755_CLK_MC] = {
> +		"mc", CGU_CLK_GATE,
> +		.parents = { JZ4755_CLK_H1CLK, },
> +		.gate = { CGU_REG_CLKGR, 19 },
> +	},
> +
> +	[JZ4755_CLK_TSSI] = {
> +		"tssi", CGU_CLK_GATE,
> +		.parents = { JZ4755_CLK_EXT_HALF/* not sure */, },
> +		.gate = { CGU_REG_CLKGR, 17 },
> +	},
> +
> +	[JZ4755_CLK_IPU] = {
> +		"ipu", CGU_CLK_GATE,
> +		.parents = { JZ4755_CLK_PLL_HALF/* not sure */, },
> +		.gate = { CGU_REG_CLKGR, 13 },
> +	},
> +
> +	[JZ4755_CLK_EXT512] = {
> +		"ext/512", CGU_CLK_FIXDIV,
> +		.parents = { JZ4755_CLK_EXT, },
> +
> +		.fixdiv = { 512 },
> +	},
> +
> +	[JZ4755_CLK_UDC_PHY] = {
> +		"udc_phy", CGU_CLK_GATE,
> +		.parents = { JZ4755_CLK_EXT_HALF, },
> +		.gate = { CGU_REG_OPCR, 6, true },
> +	},
> +};
> +
> +static void __init jz4755_cgu_init(struct device_node *np)
> +{
> +	int retval;
> +
> +	cgu = ingenic_cgu_new(jz4755_cgu_clocks,
> +			      ARRAY_SIZE(jz4755_cgu_clocks), np);
> +	if (!cgu) {
> +		pr_err("%s: failed to initialise CGU\n", __func__);
> +		return;
> +	}
> +
> +	retval = ingenic_cgu_register_clocks(cgu);
> +	if (retval)
> +		pr_err("%s: failed to register CGU Clocks\n", __func__);
> +
> +	ingenic_cgu_register_syscore_ops(cgu);
> +}
> +CLK_OF_DECLARE_DRIVER(jz4755_cgu, "ingenic,jz4755-cgu", 
> jz4755_cgu_init);
> --
> 2.36.1
>
Stephen Boyd Oct. 27, 2022, 9:57 p.m. UTC | #2 
Quoting Siarhei Volkau (2022-10-27 12:20:23)
> diff --git a/drivers/clk/ingenic/jz4755-cgu.c b/drivers/clk/ingenic/jz4755-cgu.c
> new file mode 100644
> index 000000000..d2eb3ae0c
> --- /dev/null
> +++ b/drivers/clk/ingenic/jz4755-cgu.c
> @@ -0,0 +1,346 @@
[...]
> +static void __init jz4755_cgu_init(struct device_node *np)
> +{
> +       int retval;
> +
> +       cgu = ingenic_cgu_new(jz4755_cgu_clocks,
> +                             ARRAY_SIZE(jz4755_cgu_clocks), np);
> +       if (!cgu) {
> +               pr_err("%s: failed to initialise CGU\n", __func__);
> +               return;
> +       }
> +
> +       retval = ingenic_cgu_register_clocks(cgu);
> +       if (retval)
> +               pr_err("%s: failed to register CGU Clocks\n", __func__);
> +
> +       ingenic_cgu_register_syscore_ops(cgu);
> +}
> +CLK_OF_DECLARE_DRIVER(jz4755_cgu, "ingenic,jz4755-cgu", jz4755_cgu_init);

Is there another driver that probes this device? CLK_OF_DECLARE_DRIVER()
is for the situation where we want to probe this device again with
another platform driver. Please add a comment indicating what that other
driver is.
Siarhei Volkau Oct. 28, 2022, 4:39 a.m. UTC | #3 
пт, 28 окт. 2022 г. в 00:57, Stephen Boyd <sboyd@kernel.org>:
>
> Quoting Siarhei Volkau (2022-10-27 12:20:23)
> > diff --git a/drivers/clk/ingenic/jz4755-cgu.c b/drivers/clk/ingenic/jz4755-cgu.c
> > new file mode 100644
> > index 000000000..d2eb3ae0c
> > --- /dev/null
> > +++ b/drivers/clk/ingenic/jz4755-cgu.c
> > @@ -0,0 +1,346 @@
> [...]
> > +static void __init jz4755_cgu_init(struct device_node *np)
> > +{
> > +       int retval;
> > +
> > +       cgu = ingenic_cgu_new(jz4755_cgu_clocks,
> > +                             ARRAY_SIZE(jz4755_cgu_clocks), np);
> > +       if (!cgu) {
> > +               pr_err("%s: failed to initialise CGU\n", __func__);
> > +               return;
> > +       }
> > +
> > +       retval = ingenic_cgu_register_clocks(cgu);
> > +       if (retval)
> > +               pr_err("%s: failed to register CGU Clocks\n", __func__);
> > +
> > +       ingenic_cgu_register_syscore_ops(cgu);
> > +}
> > +CLK_OF_DECLARE_DRIVER(jz4755_cgu, "ingenic,jz4755-cgu", jz4755_cgu_init);
>
> Is there another driver that probes this device? CLK_OF_DECLARE_DRIVER()
> is for the situation where we want to probe this device again with
> another platform driver. Please add a comment indicating what that other
> driver is.

I wasn't aware of that, it's just
> + * Heavily based on JZ4725b CGU driver
with no comment either, same as a few others.
Maybe it's better to fix that in a separate commit as per Paul's
proposal on unused macros'?
Paul Cercueil Oct. 28, 2022, 7:48 a.m. UTC | #4 
Hi Stephen,

Le jeu. 27 oct. 2022 à 14:57:14 -0700, Stephen Boyd <sboyd@kernel.org> 
a écrit :
> Quoting Siarhei Volkau (2022-10-27 12:20:23)
>>  diff --git a/drivers/clk/ingenic/jz4755-cgu.c 
>> b/drivers/clk/ingenic/jz4755-cgu.c
>>  new file mode 100644
>>  index 000000000..d2eb3ae0c
>>  --- /dev/null
>>  +++ b/drivers/clk/ingenic/jz4755-cgu.c
>>  @@ -0,0 +1,346 @@
> [...]
>>  +static void __init jz4755_cgu_init(struct device_node *np)
>>  +{
>>  +       int retval;
>>  +
>>  +       cgu = ingenic_cgu_new(jz4755_cgu_clocks,
>>  +                             ARRAY_SIZE(jz4755_cgu_clocks), np);
>>  +       if (!cgu) {
>>  +               pr_err("%s: failed to initialise CGU\n", __func__);
>>  +               return;
>>  +       }
>>  +
>>  +       retval = ingenic_cgu_register_clocks(cgu);
>>  +       if (retval)
>>  +               pr_err("%s: failed to register CGU Clocks\n", 
>> __func__);
>>  +
>>  +       ingenic_cgu_register_syscore_ops(cgu);
>>  +}
>>  +CLK_OF_DECLARE_DRIVER(jz4755_cgu, "ingenic,jz4755-cgu", 
>> jz4755_cgu_init);
> 
> Is there another driver that probes this device? 
> CLK_OF_DECLARE_DRIVER()
> is for the situation where we want to probe this device again with
> another platform driver. Please add a comment indicating what that 
> other
> driver is.

See: 03d570e1a4dc ("clk: ingenic: Use CLK_OF_DECLARE_DRIVER macro")

Cheers,
-Paul
Stephen Boyd Nov. 1, 2022, 7:22 p.m. UTC | #5 
Quoting Paul Cercueil (2022-10-28 00:48:35)
> Hi Stephen,
> 
> Le jeu. 27 oct. 2022 � 14:57:14 -0700, Stephen Boyd <sboyd@kernel.org> 
> a �crit :
> > Quoting Siarhei Volkau (2022-10-27 12:20:23)
> >>  diff --git a/drivers/clk/ingenic/jz4755-cgu.c 
> >> b/drivers/clk/ingenic/jz4755-cgu.c
> >>  new file mode 100644
> >>  index 000000000..d2eb3ae0c
> >>  --- /dev/null
> >>  +++ b/drivers/clk/ingenic/jz4755-cgu.c
> >>  @@ -0,0 +1,346 @@
> > [...]
> >>  +static void __init jz4755_cgu_init(struct device_node *np)
> >>  +{
> >>  +       int retval;
> >>  +
> >>  +       cgu = ingenic_cgu_new(jz4755_cgu_clocks,
> >>  +                             ARRAY_SIZE(jz4755_cgu_clocks), np);
> >>  +       if (!cgu) {
> >>  +               pr_err("%s: failed to initialise CGU\n", __func__);
> >>  +               return;
> >>  +       }
> >>  +
> >>  +       retval = ingenic_cgu_register_clocks(cgu);
> >>  +       if (retval)
> >>  +               pr_err("%s: failed to register CGU Clocks\n", 
> >> __func__);
> >>  +
> >>  +       ingenic_cgu_register_syscore_ops(cgu);
> >>  +}
> >>  +CLK_OF_DECLARE_DRIVER(jz4755_cgu, "ingenic,jz4755-cgu", 
> >> jz4755_cgu_init);
> > 
> > Is there another driver that probes this device? 
> > CLK_OF_DECLARE_DRIVER()
> > is for the situation where we want to probe this device again with
> > another platform driver. Please add a comment indicating what that 
> > other
> > driver is.
> 
> See: 03d570e1a4dc ("clk: ingenic: Use CLK_OF_DECLARE_DRIVER macro")
> 

Does that mean this is also a simple-mfd?
Paul Cercueil Nov. 1, 2022, 8:31 p.m. UTC | #6 
Hi Stephen,

Le mar. 1 nov. 2022 à 12:22:14 -0700, Stephen Boyd <sboyd@kernel.org> 
a écrit :
> Quoting Paul Cercueil (2022-10-28 00:48:35)
>>  Hi Stephen,
>> 
>>  Le jeu. 27 oct. 2022 � 14:57:14 -0700, Stephen Boyd 
>> <sboyd@kernel.org>
>>  a �crit :
>>  > Quoting Siarhei Volkau (2022-10-27 12:20:23)
>>  >>  diff --git a/drivers/clk/ingenic/jz4755-cgu.c
>>  >> b/drivers/clk/ingenic/jz4755-cgu.c
>>  >>  new file mode 100644
>>  >>  index 000000000..d2eb3ae0c
>>  >>  --- /dev/null
>>  >>  +++ b/drivers/clk/ingenic/jz4755-cgu.c
>>  >>  @@ -0,0 +1,346 @@
>>  > [...]
>>  >>  +static void __init jz4755_cgu_init(struct device_node *np)
>>  >>  +{
>>  >>  +       int retval;
>>  >>  +
>>  >>  +       cgu = ingenic_cgu_new(jz4755_cgu_clocks,
>>  >>  +                             ARRAY_SIZE(jz4755_cgu_clocks), 
>> np);
>>  >>  +       if (!cgu) {
>>  >>  +               pr_err("%s: failed to initialise CGU\n", 
>> __func__);
>>  >>  +               return;
>>  >>  +       }
>>  >>  +
>>  >>  +       retval = ingenic_cgu_register_clocks(cgu);
>>  >>  +       if (retval)
>>  >>  +               pr_err("%s: failed to register CGU Clocks\n",
>>  >> __func__);
>>  >>  +
>>  >>  +       ingenic_cgu_register_syscore_ops(cgu);
>>  >>  +}
>>  >>  +CLK_OF_DECLARE_DRIVER(jz4755_cgu, "ingenic,jz4755-cgu",
>>  >> jz4755_cgu_init);
>>  >
>>  > Is there another driver that probes this device?
>>  > CLK_OF_DECLARE_DRIVER()
>>  > is for the situation where we want to probe this device again with
>>  > another platform driver. Please add a comment indicating what that
>>  > other
>>  > driver is.
>> 
>>  See: 03d570e1a4dc ("clk: ingenic: Use CLK_OF_DECLARE_DRIVER macro")
>> 
> 
> Does that mean this is also a simple-mfd?

Yes - there's the USB PHY registers randomly in the middle of the 
clocks IP.

-Paul
diff mbox series

Patch

diff --git a/drivers/clk/ingenic/Kconfig b/drivers/clk/ingenic/Kconfig
index 898f1bc47..f80ac4f29 100644
--- a/drivers/clk/ingenic/Kconfig
+++ b/drivers/clk/ingenic/Kconfig
@@ -15,6 +15,16 @@  config INGENIC_CGU_JZ4740
 
 	  If building for a JZ4740 SoC, you want to say Y here.
 
+config INGENIC_CGU_JZ4755
+	bool "Ingenic JZ4755 CGU driver"
+	default MACH_JZ4755
+	select INGENIC_CGU_COMMON
+	help
+	  Support the clocks provided by the CGU hardware on Ingenic JZ4755
+	  and compatible SoCs.
+
+	  If building for a JZ4755 SoC, you want to say Y here.
+
 config INGENIC_CGU_JZ4725B
 	bool "Ingenic JZ4725B CGU driver"
 	default MACH_JZ4725B
diff --git a/drivers/clk/ingenic/Makefile b/drivers/clk/ingenic/Makefile
index 9edfaf461..81d8e23c2 100644
--- a/drivers/clk/ingenic/Makefile
+++ b/drivers/clk/ingenic/Makefile
@@ -1,6 +1,7 @@ 
 # SPDX-License-Identifier: GPL-2.0-only
 obj-$(CONFIG_INGENIC_CGU_COMMON)	+= cgu.o pm.o
 obj-$(CONFIG_INGENIC_CGU_JZ4740)	+= jz4740-cgu.o
+obj-$(CONFIG_INGENIC_CGU_JZ4755)	+= jz4755-cgu.o
 obj-$(CONFIG_INGENIC_CGU_JZ4725B)	+= jz4725b-cgu.o
 obj-$(CONFIG_INGENIC_CGU_JZ4760)	+= jz4760-cgu.o
 obj-$(CONFIG_INGENIC_CGU_JZ4770)	+= jz4770-cgu.o
diff --git a/drivers/clk/ingenic/jz4755-cgu.c b/drivers/clk/ingenic/jz4755-cgu.c
new file mode 100644
index 000000000..d2eb3ae0c
--- /dev/null
+++ b/drivers/clk/ingenic/jz4755-cgu.c
@@ -0,0 +1,346 @@ 
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Ingenic JZ4755 SoC CGU driver
+ * Heavily based on JZ4725b CGU driver
+ *
+ * Copyright (C) 2022 Siarhei Volkau
+ * Author: Siarhei Volkau <lis8215@gmail.com>
+ */
+
+#include <linux/clk-provider.h>
+#include <linux/delay.h>
+#include <linux/of.h>
+
+#include <dt-bindings/clock/ingenic,jz4755-cgu.h>
+
+#include "cgu.h"
+#include "pm.h"
+
+/* CGU register offsets */
+#define CGU_REG_CPCCR		0x00
+#define CGU_REG_LCR		0x04
+#define CGU_REG_CPPCR		0x10
+#define CGU_REG_CLKGR		0x20
+#define CGU_REG_OPCR		0x24
+#define CGU_REG_I2SCDR		0x60
+#define CGU_REG_LPCDR		0x64
+#define CGU_REG_MSCCDR		0x68
+#define CGU_REG_SSICDR		0x74
+#define CGU_REG_CIMCDR		0x7C
+
+/* bits within the LCR register */
+#define LCR_SLEEP		BIT(0)
+
+static struct ingenic_cgu *cgu;
+
+static const s8 pll_od_encoding[4] = {
+	0x0, 0x1, -1, 0x3,
+};
+
+static const u8 jz4755_cgu_cpccr_div_table[] = {
+	1, 2, 3, 4, 6, 8,
+};
+
+static const u8 jz4755_cgu_pll_half_div_table[] = {
+	2, 1,
+};
+
+static const struct ingenic_cgu_clk_info jz4755_cgu_clocks[] = {
+
+	/* External clocks */
+
+	[JZ4755_CLK_EXT] = { "ext", CGU_CLK_EXT },
+	[JZ4755_CLK_OSC32K] = { "osc32k", CGU_CLK_EXT },
+
+	[JZ4755_CLK_PLL] = {
+		"pll", CGU_CLK_PLL,
+		.parents = { JZ4755_CLK_EXT, },
+		.pll = {
+			.reg = CGU_REG_CPPCR,
+			.rate_multiplier = 1,
+			.m_shift = 23,
+			.m_bits = 9,
+			.m_offset = 2,
+			.n_shift = 18,
+			.n_bits = 5,
+			.n_offset = 2,
+			.od_shift = 16,
+			.od_bits = 2,
+			.od_max = 4,
+			.od_encoding = pll_od_encoding,
+			.stable_bit = 10,
+			.bypass_reg = CGU_REG_CPPCR,
+			.bypass_bit = 9,
+			.enable_bit = 8,
+		},
+	},
+
+	/* Muxes & dividers */
+
+	[JZ4755_CLK_PLL_HALF] = {
+		"pll half", CGU_CLK_DIV,
+		.parents = { JZ4755_CLK_PLL, },
+		.div = {
+			CGU_REG_CPCCR, 21, 1, 1, -1, -1, -1, 0,
+			jz4755_cgu_pll_half_div_table,
+		},
+	},
+
+	[JZ4755_CLK_EXT_HALF] = {
+		"ext half", CGU_CLK_DIV,
+		.parents = { JZ4755_CLK_EXT, },
+		.div = {
+			CGU_REG_CPCCR, 30, 1, 1, -1, -1, -1, 0,
+			NULL,
+		},
+	},
+
+	[JZ4755_CLK_CCLK] = {
+		"cclk", CGU_CLK_DIV,
+		.parents = { JZ4755_CLK_PLL, },
+		.div = {
+			CGU_REG_CPCCR, 0, 1, 4, 22, -1, -1, 0,
+			jz4755_cgu_cpccr_div_table,
+		},
+	},
+
+	[JZ4755_CLK_H0CLK] = {
+		"hclk", CGU_CLK_DIV,
+		.parents = { JZ4755_CLK_PLL, },
+		.div = {
+			CGU_REG_CPCCR, 4, 1, 4, 22, -1, -1, 0,
+			jz4755_cgu_cpccr_div_table,
+		},
+	},
+
+	[JZ4755_CLK_PCLK] = {
+		"pclk", CGU_CLK_DIV,
+		.parents = { JZ4755_CLK_PLL, },
+		.div = {
+			CGU_REG_CPCCR, 8, 1, 4, 22, -1, -1, 0,
+			jz4755_cgu_cpccr_div_table,
+		},
+	},
+
+	[JZ4755_CLK_MCLK] = {
+		"mclk", CGU_CLK_DIV,
+		.parents = { JZ4755_CLK_PLL, },
+		.div = {
+			CGU_REG_CPCCR, 12, 1, 4, 22, -1, -1, 0,
+			jz4755_cgu_cpccr_div_table,
+		},
+	},
+
+	[JZ4755_CLK_H1CLK] = {
+		"h1clk", CGU_CLK_DIV,
+		.parents = { JZ4755_CLK_PLL, },
+		.div = {
+			CGU_REG_CPCCR, 16, 1, 4, 22, -1, -1, 0,
+			jz4755_cgu_cpccr_div_table,
+		},
+	},
+
+	[JZ4755_CLK_UDC] = {
+		"udc", CGU_CLK_MUX | CGU_CLK_DIV | CGU_CLK_GATE,
+		.parents = { JZ4755_CLK_EXT_HALF, JZ4755_CLK_PLL_HALF, },
+		.mux = { CGU_REG_CPCCR, 29, 1 },
+		.div = { CGU_REG_CPCCR, 23, 1, 6, -1, -1, -1 },
+		.gate = { CGU_REG_CLKGR, 10 },
+	},
+
+	[JZ4755_CLK_LCD] = {
+		"lcd", CGU_CLK_DIV | CGU_CLK_GATE,
+		.parents = { JZ4755_CLK_PLL_HALF, },
+		.div = { CGU_REG_LPCDR, 0, 1, 11, -1, -1, -1 },
+		.gate = { CGU_REG_CLKGR, 9 },
+	},
+
+	[JZ4755_CLK_MMC] = {
+		"mmc", CGU_CLK_DIV,
+		.parents = { JZ4755_CLK_PLL_HALF, },
+		.div = { CGU_REG_MSCCDR, 0, 1, 5, -1, -1, -1 },
+	},
+
+	[JZ4755_CLK_I2S] = {
+		"i2s", CGU_CLK_MUX | CGU_CLK_DIV,
+		.parents = { JZ4755_CLK_EXT_HALF, JZ4755_CLK_PLL_HALF, },
+		.mux = { CGU_REG_CPCCR, 31, 1 },
+		.div = { CGU_REG_I2SCDR, 0, 1, 9, -1, -1, -1 },
+	},
+
+	[JZ4755_CLK_SPI] = {
+		"spi", CGU_CLK_DIV | CGU_CLK_GATE,
+		.parents = { JZ4755_CLK_PLL_HALF, },
+		.div = { CGU_REG_SSICDR, 0, 1, 4, -1, -1, -1 },
+		.gate = { CGU_REG_CLKGR, 4 },
+	},
+
+	[JZ4755_CLK_TVE] = {
+		"tve", CGU_CLK_MUX | CGU_CLK_GATE,
+		.parents = { JZ4755_CLK_LCD, JZ4755_CLK_EXT, },
+		.mux = { CGU_REG_LPCDR, 31, 1 },
+		.gate = { CGU_REG_CLKGR, 18 },
+	},
+
+	[JZ4755_CLK_RTC] = {
+		"rtc", CGU_CLK_MUX | CGU_CLK_GATE,
+		.parents = { JZ4755_CLK_EXT512, JZ4755_CLK_OSC32K, },
+		.mux = { CGU_REG_OPCR, 2, 1},
+		.gate = { CGU_REG_CLKGR, 2 },
+	},
+
+	[JZ4755_CLK_CIM] = {
+		"cim", CGU_CLK_DIV | CGU_CLK_GATE,
+		.parents = { JZ4755_CLK_PLL_HALF, },
+		.div = { CGU_REG_CIMCDR, 0, 1, 8, -1, -1, -1 },
+		.gate = { CGU_REG_CLKGR, 8 },
+	},
+
+	/* Gate-only clocks */
+
+	[JZ4755_CLK_UART0] = {
+		"uart0", CGU_CLK_GATE,
+		.parents = { JZ4755_CLK_EXT_HALF, },
+		.gate = { CGU_REG_CLKGR, 0 },
+	},
+
+	[JZ4755_CLK_UART1] = {
+		"uart1", CGU_CLK_GATE,
+		.parents = { JZ4755_CLK_EXT_HALF, },
+		.gate = { CGU_REG_CLKGR, 14 },
+	},
+
+	[JZ4755_CLK_UART2] = {
+		"uart2", CGU_CLK_GATE,
+		.parents = { JZ4755_CLK_EXT_HALF, },
+		.gate = { CGU_REG_CLKGR, 15 },
+	},
+
+	[JZ4755_CLK_ADC] = {
+		"adc", CGU_CLK_GATE,
+		.parents = { JZ4755_CLK_EXT_HALF, },
+		.gate = { CGU_REG_CLKGR, 7 },
+	},
+
+	[JZ4755_CLK_AIC] = {
+		"aic", CGU_CLK_GATE,
+		.parents = { JZ4755_CLK_EXT_HALF, },
+		.gate = { CGU_REG_CLKGR, 5 },
+	},
+
+	[JZ4755_CLK_I2C] = {
+		"i2c", CGU_CLK_GATE,
+		.parents = { JZ4755_CLK_EXT_HALF, },
+		.gate = { CGU_REG_CLKGR, 3 },
+	},
+
+	[JZ4755_CLK_BCH] = {
+		"bch", CGU_CLK_GATE,
+		.parents = { JZ4755_CLK_H1CLK, },
+		.gate = { CGU_REG_CLKGR, 11 },
+	},
+
+	[JZ4755_CLK_TCU] = {
+		"tcu", CGU_CLK_GATE,
+		.parents = { JZ4755_CLK_EXT, },
+		.gate = { CGU_REG_CLKGR, 1 },
+	},
+
+	[JZ4755_CLK_DMA] = {
+		"dma", CGU_CLK_GATE,
+		.parents = { JZ4755_CLK_PCLK, },
+		.gate = { CGU_REG_CLKGR, 12 },
+	},
+
+	[JZ4755_CLK_MMC0] = {
+		"mmc0", CGU_CLK_GATE,
+		.parents = { JZ4755_CLK_MMC, },
+		.gate = { CGU_REG_CLKGR, 6 },
+	},
+
+	[JZ4755_CLK_MMC1] = {
+		"mmc1", CGU_CLK_GATE,
+		.parents = { JZ4755_CLK_MMC, },
+		.gate = { CGU_REG_CLKGR, 16 },
+	},
+
+	[JZ4755_CLK_AUX_CPU] = {
+		"aux_cpu", CGU_CLK_GATE,
+		.parents = { JZ4755_CLK_H1CLK, },
+		.gate = { CGU_REG_CLKGR, 24 },
+	},
+
+	[JZ4755_CLK_AHB1] = {
+		"ahb1", CGU_CLK_GATE,
+		.parents = { JZ4755_CLK_H1CLK, },
+		.gate = { CGU_REG_CLKGR, 23 },
+	},
+
+	[JZ4755_CLK_IDCT] = {
+		"idct", CGU_CLK_GATE,
+		.parents = { JZ4755_CLK_H1CLK, },
+		.gate = { CGU_REG_CLKGR, 22 },
+	},
+
+	[JZ4755_CLK_DB] = {
+		"db", CGU_CLK_GATE,
+		.parents = { JZ4755_CLK_H1CLK, },
+		.gate = { CGU_REG_CLKGR, 21 },
+	},
+
+	[JZ4755_CLK_ME] = {
+		"me", CGU_CLK_GATE,
+		.parents = { JZ4755_CLK_H1CLK, },
+		.gate = { CGU_REG_CLKGR, 20 },
+	},
+
+	[JZ4755_CLK_MC] = {
+		"mc", CGU_CLK_GATE,
+		.parents = { JZ4755_CLK_H1CLK, },
+		.gate = { CGU_REG_CLKGR, 19 },
+	},
+
+	[JZ4755_CLK_TSSI] = {
+		"tssi", CGU_CLK_GATE,
+		.parents = { JZ4755_CLK_EXT_HALF/* not sure */, },
+		.gate = { CGU_REG_CLKGR, 17 },
+	},
+
+	[JZ4755_CLK_IPU] = {
+		"ipu", CGU_CLK_GATE,
+		.parents = { JZ4755_CLK_PLL_HALF/* not sure */, },
+		.gate = { CGU_REG_CLKGR, 13 },
+	},
+
+	[JZ4755_CLK_EXT512] = {
+		"ext/512", CGU_CLK_FIXDIV,
+		.parents = { JZ4755_CLK_EXT, },
+
+		.fixdiv = { 512 },
+	},
+
+	[JZ4755_CLK_UDC_PHY] = {
+		"udc_phy", CGU_CLK_GATE,
+		.parents = { JZ4755_CLK_EXT_HALF, },
+		.gate = { CGU_REG_OPCR, 6, true },
+	},
+};
+
+static void __init jz4755_cgu_init(struct device_node *np)
+{
+	int retval;
+
+	cgu = ingenic_cgu_new(jz4755_cgu_clocks,
+			      ARRAY_SIZE(jz4755_cgu_clocks), np);
+	if (!cgu) {
+		pr_err("%s: failed to initialise CGU\n", __func__);
+		return;
+	}
+
+	retval = ingenic_cgu_register_clocks(cgu);
+	if (retval)
+		pr_err("%s: failed to register CGU Clocks\n", __func__);
+
+	ingenic_cgu_register_syscore_ops(cgu);
+}
+CLK_OF_DECLARE_DRIVER(jz4755_cgu, "ingenic,jz4755-cgu", jz4755_cgu_init);