RE: [PATCH v2 4/9] clk: ast2700: add clock controller

From: Ryan Chen
Date: Mon Oct 07 2024 - 23:41:48 EST

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In reply to: Kevin Chen: "RE: [PATCH v2 4/9] clk: ast2700: add clock controller"
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Hello Dmitry,
Thanks, your review.
I will update in my next clk patch.
And include you in review email.

> Subject: RE: [PATCH v2 4/9] clk: ast2700: add clock controller
>
> > >
> > > Add support for ast2700 clock controller.
> > >
> > > Signed-off-by: Kevin Chen <kevin_chen@xxxxxxxxxxxxxx>
> > > ---
> > > drivers/clk/Makefile | 1 +
> > > drivers/clk/clk-ast2700.c | 1173
> > > +++++++++++++++++++++++++++++++++++++
> > > 2 files changed, 1174 insertions(+) create mode 100644
> > > drivers/clk/clk-ast2700.c
> > >
> > > diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile index
> > > f793a16cad40..0d5992ea0fa4 100644
> > > --- a/drivers/clk/Makefile
> > > +++ b/drivers/clk/Makefile
> > > @@ -38,6 +38,7 @@ obj-$(CONFIG_COMMON_CLK_FSL_SAI) +=
> > clk-fsl-sai.o
> > > obj-$(CONFIG_COMMON_CLK_GEMINI) +=
> clk-gemini.o
> > > obj-$(CONFIG_COMMON_CLK_ASPEED) +=
> clk-aspeed.o
> > > obj-$(CONFIG_MACH_ASPEED_G6) += clk-ast2600.o
> > > +obj-$(CONFIG_MACH_ASPEED_G7) += clk-ast2700.o
> > > obj-$(CONFIG_ARCH_HIGHBANK) += clk-highbank.o
> > > obj-$(CONFIG_CLK_HSDK) += clk-hsdk-pll.o
> > > obj-$(CONFIG_COMMON_CLK_K210) += clk-k210.o
> > > diff --git a/drivers/clk/clk-ast2700.c b/drivers/clk/clk-ast2700.c
> > > new file mode 100644 index 000000000000..eec8e0cb83d9
> > > --- /dev/null
> > > +++ b/drivers/clk/clk-ast2700.c
> > > @@ -0,0 +1,1173 @@
> > > +// SPDX-License-Identifier: GPL-2.0-or-later // Copyright ASPEED
> > > +Technology
> > > +
> > > +#include <linux/clk-provider.h>
> > > +#include <linux/of_address.h>
> > > +#include <linux/of_device.h>
> > > +#include <linux/reset-controller.h>
> > > +
> > > +#include <dt-bindings/clock/aspeed,ast2700-clk.h>
> > > +#include <dt-bindings/reset/aspeed,ast2700-reset.h>
> > > +
> > > +#define SCU_CLK_24MHZ 24000000
> >
> > Are Aspeed's 24 MHz somehow different from 24 MHz on other platforms?
> > Please use <linux/units.h> and refrain from defining just random
> > values. If it has some special meaning (like XO clock or some other
> > fixed funcion), please use logical names.
> Already split clock and reset to Ryan's commit.
> https://patchwork.kernel.org/project/linux-clk/list/?series=892020
> Please check the series of " Add support for AST2700 clk driver".
>
> >
> > > +#define SCU_CLK_25MHZ 25000000
> > > +#define SCU_CLK_192MHZ 192000000
> > > +/* SOC0 USB2 PHY CLK*/
> > > +#define SCU_CLK_12MHZ 12000000
> >
> > So, this can be #define ASPEED_SOC0_USB2_PHY_RATE (12 * HZ_PER_MHZ)
> Already split clock and reset to Ryan's commit.
> https://patchwork.kernel.org/project/linux-clk/list/?series=892020
> Please check the series of " Add support for AST2700 clk driver".
>
> >
> > > +/* SOC0 */
> > > +#define SCU0_HWSTRAP1 0x010
> > > +#define SCU0_CLK_STOP 0x240
> > > +#define SCU0_CLK_SEL1 0x280
> > > +#define SCU0_CLK_SEL2 0x284
> > > +#define GET_USB_REFCLK_DIV(x) ((GENMASK(23, 20) & (x)) >> 20)
> > > +#define UART_DIV13_EN BIT(30) #define SCU0_HPLL_PARAM 0x300
> #define
> > > +SCU0_DPLL_PARAM 0x308 #define SCU0_MPLL_PARAM 0x310 #define
> > > +SCU0_D1CLK_PARAM 0x320 #define SCU0_D2CLK_PARAM 0x330 #define
> > > +SCU0_CRT1CLK_PARAM 0x340 #define SCU0_CRT2CLK_PARAM 0x350
> > #define
> > > +SCU0_MPHYCLK_PARAM 0x360
> > > +
> > > +/* SOC1 */
> > > +#define SCU1_CLK_STOP 0x240
> > > +#define SCU1_CLK_STOP2 0x260
> > > +#define SCU1_CLK_SEL1 0x280
> > > +#define SCU1_CLK_SEL2 0x284
> > > +#define UXCLK_MASK GENMASK(1, 0)
> > > +#define HUXCLK_MASK GENMASK(4, 3)
> > > +#define SCU1_HPLL_PARAM 0x300
> > > +#define SCU1_APLL_PARAM 0x310
> > > +#define SCU1_DPLL_PARAM 0x320
> > > +#define SCU1_UXCLK_CTRL 0x330
> > > +#define SCU1_HUXCLK_CTRL 0x334
> > > +#define SCU1_MAC12_CLK_DLY 0x390
> > > +#define SCU1_MAC12_CLK_DLY_100M 0x394 #define
> > SCU1_MAC12_CLK_DLY_10M
> > > +0x398
> > > +
> > > +/*
> > > + * MAC Clock Delay settings
> > > + */
> > > +#define MAC_CLK_RMII1_50M_RCLK_O_CTRL BIT(30)
> > > +#define MAC_CLK_RMII1_50M_RCLK_O_DIS 0
> > > +#define MAC_CLK_RMII1_50M_RCLK_O_EN 1
> > > +#define MAC_CLK_RMII0_50M_RCLK_O_CTRL BIT(29)
> > > +#define MAC_CLK_RMII0_5M_RCLK_O_DIS 0
> > > +#define MAC_CLK_RMII0_5M_RCLK_O_EN 1
> > > +#define MAC_CLK_RMII_TXD_FALLING_2 BIT(27)
> > > +#define MAC_CLK_RMII_TXD_FALLING_1 BIT(26)
> > > +#define MAC_CLK_RXCLK_INV_2 BIT(25)
> > > +#define MAC_CLK_RXCLK_INV_1 BIT(24)
> > > +#define MAC_CLK_1G_INPUT_DELAY_2 GENMASK(23,
> 18)
> > > +#define MAC_CLK_1G_INPUT_DELAY_1 GENMASK(17,
> 12)
> > > +#define MAC_CLK_1G_OUTPUT_DELAY_2 GENMASK(11,
> 6)
> > > +#define MAC_CLK_1G_OUTPUT_DELAY_1 GENMASK(5,
> 0)
> > > +
> > > +#define MAC_CLK_100M_10M_RESERVED
> GENMASK(31,
> > 26)
> > > +#define MAC_CLK_100M_10M_RXCLK_INV_2 BIT(25)
> > > +#define MAC_CLK_100M_10M_RXCLK_INV_1 BIT(24)
> > > +#define MAC_CLK_100M_10M_INPUT_DELAY_2
> GENMASK(23,
> > 18)
> > > +#define MAC_CLK_100M_10M_INPUT_DELAY_1
> GENMASK(17,
> > 12)
> > > +#define MAC_CLK_100M_10M_OUTPUT_DELAY_2
> > GENMASK(11, 6)
> > > +#define MAC_CLK_100M_10M_OUTPUT_DELAY_1
> > GENMASK(5, 0)
> > > +
> > > +#define AST2700_DEF_MAC12_DELAY_1G 0x00CF4D75
> >
> > lowcase hex, please.
> Already split clock and reset to Ryan's commit.
> https://patchwork.kernel.org/project/linux-clk/list/?series=892020
> Please check the series of " Add support for AST2700 clk driver".
>
> >
> > > +#define AST2700_DEF_MAC12_DELAY_100M 0x00410410
> > > +#define AST2700_DEF_MAC12_DELAY_10M 0x00410410
> > > +
> > > +struct mac_delay_config {
> > > + u32 tx_delay_1000;
> > > + u32 rx_delay_1000;
> > > + u32 tx_delay_100;
> > > + u32 rx_delay_100;
> > > + u32 tx_delay_10;
> > > + u32 rx_delay_10;
> > > +};
> > > +
> > > +/* Globally visible clocks */
> > > +static DEFINE_SPINLOCK(ast2700_clk_lock);
> > > +
> > > +/* Division of RGMII Clock */
> > > +static const struct clk_div_table ast2700_rgmii_div_table[] = {
> > > + { 0x0, 4 },
> > > + { 0x1, 4 },
> > > + { 0x2, 6 },
> > > + { 0x3, 8 },
> > > + { 0x4, 10 },
> > > + { 0x5, 12 },
> > > + { 0x6, 14 },
> > > + { 0x7, 16 },
> > > + { 0 }
> > > +};
> > > +
> > > +/* Division of RMII Clock */
> > > +static const struct clk_div_table ast2700_rmii_div_table[] = {
> > > + { 0x0, 8 },
> > > + { 0x1, 8 },
> > > + { 0x2, 12 },
> > > + { 0x3, 16 },
> > > + { 0x4, 20 },
> > > + { 0x5, 24 },
> > > + { 0x6, 28 },
> > > + { 0x7, 32 },
> > > + { 0 }
> > > +};
> > > +
> > > +/* Division of HCLK/SDIO/MAC/apll_divn CLK */ static const struct
> > > +clk_div_table ast2700_clk_div_table[] = {
> > > + { 0x0, 2 },
> > > + { 0x1, 2 },
> > > + { 0x2, 3 },
> > > + { 0x3, 4 },
> > > + { 0x4, 5 },
> > > + { 0x5, 6 },
> > > + { 0x6, 7 },
> > > + { 0x7, 8 },
> > > + { 0 }
> > > +};
> > > +
> > > +/* Division of PCLK/EMMC CLK */
> > > +static const struct clk_div_table ast2700_clk_div_table2[] = {
> > > + { 0x0, 2 },
> > > + { 0x1, 4 },
> > > + { 0x2, 6 },
> > > + { 0x3, 8 },
> > > + { 0x4, 10 },
> > > + { 0x5, 12 },
> > > + { 0x6, 14 },
> > > + { 0x7, 16 },
> > > + { 0 }
> > > +};
> > > +
> > > +/* HPLL/DPLL: 2000Mhz(default) */
> > > +static struct clk_hw *ast2700_soc0_hw_pll(const char *name, const
> > > +char *parent_name, u32 val)
> >
> > Please migrate from using parent_names to either using parent_hw or
> > using fwname to specify the parent clock.
> Already split clock and reset to Ryan's commit.
> https://patchwork.kernel.org/project/linux-clk/list/?series=892020
> Please check the series of " Add support for AST2700 clk driver".
>
> >
> > > +{
> > > + unsigned int mult, div;
> > > +
> > > + if (val & BIT(24)) {
> > > + /* Pass through mode */
> > > + mult = 1;
> > > + div = 1;
> > > + } else {
> > > + /* F = CLKIN(25MHz) * [(M+1) / 2(N+1)] / (P+1) */
> > > + u32 m = val & 0x1fff;
> > > + u32 n = (val >> 13) & 0x3f;
> > > + u32 p = (val >> 19) & 0xf;
> > > +
> > > + mult = (m + 1) / (2 * (n + 1));
> > > + div = (p + 1);
> > > + }
> > > +
> > > + return clk_hw_register_fixed_factor(NULL, name, parent_name,
> > > +0, mult, div); };
> > > +
> > > +/* MPLL 1600Mhz(default) */
> > > +static struct clk_hw *ast2700_calc_mpll(const char *name, const
> > > +char *parent_name, u32 val) {
> > > + unsigned int mult, div;
> > > +
> > > + if (val & BIT(24)) {
> > > + /* Pass through mode */
> > > + div = 1;
> > > + mult = div;
> > > + } else {
> > > + /* F = CLKIN(25MHz) * [CLKF/(CLKR+1)] /(CLKOD+1) */
> > > + u32 m = val & 0x1fff;
> > > + u32 n = (val >> 13) & 0x3f;
> > > + u32 p = (val >> 19) & 0xf;
> > > +
> > > + mult = m / (n + 1);
> > > + div = (p + 1);
> > > + }
> > > + return clk_hw_register_fixed_factor(NULL, name, parent_name,
> > > +0, mult, div); };
> > > +
> > > +static struct clk_hw *ast2700_calc_uclk(const char *name, u32 val) {
> > > + unsigned int mult, div;
> > > +
> > > + /* UARTCLK = UXCLK * R / (N * 2) */
> > > + u32 r = val & 0xff;
> > > + u32 n = (val >> 8) & 0x3ff;
> > > +
> > > + mult = r;
> > > + div = n * 2;
> > > +
> > > + return clk_hw_register_fixed_factor(NULL, name, "uxclk", 0,
> > > +mult, div); };
> > > +
> > > +static struct clk_hw *ast2700_calc_huclk(const char *name, u32 val) {
> > > + unsigned int mult, div;
> > > +
> > > + /* UARTCLK = UXCLK * R / (N * 2) */
> > > + u32 r = val & 0xff;
> > > + u32 n = (val >> 8) & 0x3ff;
> > > +
> > > + mult = r;
> > > + div = n * 2;
> > > +
> > > + return clk_hw_register_fixed_factor(NULL, name, "huxclk", 0,
> > > +mult, div); };
> > > +
> > > +static struct clk_hw *ast2700_calc_soc1_pll(const char *name, const
> > > +char *parent_name, u32 val)
> >
> > How is this different from ast2700_soc0_hw_pll() ?
> Already split clock and reset to Ryan's commit.
> https://patchwork.kernel.org/project/linux-clk/list/?series=892020
> Please check the series of " Add support for AST2700 clk driver".
>
> >
> > > +{
> > > + unsigned int mult, div;
> > > +
> > > + if (val & BIT(24)) {
> > > + /* Pass through mode */
> > > + div = 1;
> > > + mult = div;
> > > + } else {
> > > + /* F = 25Mhz * [(M + 1) / (n + 1)] / (p + 1) */
> > > + u32 m = val & 0x1fff;
> > > + u32 n = (val >> 13) & 0x3f;
> > > + u32 p = (val >> 19) & 0xf;
> > > +
> > > + mult = (m + 1) / (n + 1);
> > > + div = (p + 1);
> > > + }
> > > + return clk_hw_register_fixed_factor(NULL, name, parent_name,
> > > +0, mult, div); };
> > > +
> >
> >
> > --
> > With best wishes
> > Dmitry

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