Re: [v2 09/24] clk: mediatek: Add MT8195 infrastructure clock support

[Chen-Yu Tsai <wenst@chromium.org>]

On Fri, Aug 20, 2021 at 7:21 PM Chun-Jie Chen
<chun-jie.chen@mediatek.com> wrote:
>
> Add MT8195 infrastructure clock controller which provides
> clock gate control for basic IP like pwm, uart, spi and so on.
>
> Signed-off-by: Chun-Jie Chen <chun-jie.chen@mediatek.com>
> ---
>  drivers/clk/mediatek/Makefile              |   2 +-
>  drivers/clk/mediatek/clk-mt8195-infra_ao.c | 211 +++++++++++++++++++++
>  2 files changed, 212 insertions(+), 1 deletion(-)
>  create mode 100644 drivers/clk/mediatek/clk-mt8195-infra_ao.c
>
> diff --git a/drivers/clk/mediatek/Makefile b/drivers/clk/mediatek/Makefile
> index d5ee396dcded..c5a80645f10e 100644
> --- a/drivers/clk/mediatek/Makefile
> +++ b/drivers/clk/mediatek/Makefile
> @@ -80,6 +80,6 @@ obj-$(CONFIG_COMMON_CLK_MT8192_MSDC) += clk-mt8192-msdc.o
>  obj-$(CONFIG_COMMON_CLK_MT8192_SCP_ADSP) += clk-mt8192-scp_adsp.o
>  obj-$(CONFIG_COMMON_CLK_MT8192_VDECSYS) += clk-mt8192-vdec.o
>  obj-$(CONFIG_COMMON_CLK_MT8192_VENCSYS) += clk-mt8192-venc.o
> -obj-$(CONFIG_COMMON_CLK_MT8195) += clk-mt8195-apmixedsys.o clk-mt8195-topckgen.o clk-mt8195-peri_ao.o
> +obj-$(CONFIG_COMMON_CLK_MT8195) += clk-mt8195-apmixedsys.o clk-mt8195-topckgen.o clk-mt8195-peri_ao.o clk-mt8195-infra_ao.o

Same thing about line width.

>  obj-$(CONFIG_COMMON_CLK_MT8516) += clk-mt8516.o
>  obj-$(CONFIG_COMMON_CLK_MT8516_AUDSYS) += clk-mt8516-aud.o
> diff --git a/drivers/clk/mediatek/clk-mt8195-infra_ao.c b/drivers/clk/mediatek/clk-mt8195-infra_ao.c
> new file mode 100644
> index 000000000000..a5794c65f743
> --- /dev/null
> +++ b/drivers/clk/mediatek/clk-mt8195-infra_ao.c
> @@ -0,0 +1,211 @@
> +// SPDX-License-Identifier: (GPL-2.0 OR MIT)
> +//
> +// Copyright (c) 2021 MediaTek Inc.
> +// Author: Chun-Jie Chen <chun-jie.chen@mediatek.com>
> +
> +#include "clk-gate.h"
> +#include "clk-mtk.h"
> +
> +#include <dt-bindings/clock/mt8195-clk.h>
> +#include <linux/clk-provider.h>
> +#include <linux/platform_device.h>
> +
> +static const struct mtk_gate_regs infra_ao0_cg_regs = {
> +       .set_ofs = 0x80,
> +       .clr_ofs = 0x84,
> +       .sta_ofs = 0x90,
> +};
> +
> +static const struct mtk_gate_regs infra_ao1_cg_regs = {
> +       .set_ofs = 0x88,
> +       .clr_ofs = 0x8c,
> +       .sta_ofs = 0x94,
> +};
> +
> +static const struct mtk_gate_regs infra_ao2_cg_regs = {
> +       .set_ofs = 0xa4,
> +       .clr_ofs = 0xa8,
> +       .sta_ofs = 0xac,
> +};
> +
> +static const struct mtk_gate_regs infra_ao3_cg_regs = {
> +       .set_ofs = 0xc0,
> +       .clr_ofs = 0xc4,
> +       .sta_ofs = 0xc8,
> +};
> +
> +static const struct mtk_gate_regs infra_ao4_cg_regs = {
> +       .set_ofs = 0xe0,
> +       .clr_ofs = 0xe4,
> +       .sta_ofs = 0xe8,
> +};
> +
> +#define GATE_INFRA_AO0_FLAGS(_id, _name, _parent, _shift, _flag)                \
> +       GATE_MTK_FLAGS(_id, _name, _parent, &infra_ao0_cg_regs, _shift, \
> +               &mtk_clk_gate_ops_setclr, _flag)
> +
> +#define GATE_INFRA_AO0(_id, _name, _parent, _shift)    \
> +       GATE_INFRA_AO0_FLAGS(_id, _name, _parent, _shift, 0)
> +
> +#define GATE_INFRA_AO1_FLAGS(_id, _name, _parent, _shift, _flag)               \
> +       GATE_MTK_FLAGS(_id, _name, _parent, &infra_ao1_cg_regs, _shift, \
> +               &mtk_clk_gate_ops_setclr, _flag)
> +
> +#define GATE_INFRA_AO1(_id, _name, _parent, _shift)    \
> +       GATE_INFRA_AO1_FLAGS(_id, _name, _parent, _shift, 0)
> +
> +#define GATE_INFRA_AO2(_id, _name, _parent, _shift)                    \
> +       GATE_MTK(_id, _name, _parent, &infra_ao2_cg_regs, _shift, &mtk_clk_gate_ops_setclr)
> +
> +#define GATE_INFRA_AO3_FLAGS(_id, _name, _parent, _shift, _flag)               \
> +       GATE_MTK_FLAGS(_id, _name, _parent, &infra_ao3_cg_regs, _shift, \
> +               &mtk_clk_gate_ops_setclr, _flag)
> +
> +#define GATE_INFRA_AO3(_id, _name, _parent, _shift)    \
> +       GATE_INFRA_AO3_FLAGS(_id, _name, _parent, _shift, 0)
> +
> +#define GATE_INFRA_AO4_FLAGS(_id, _name, _parent, _shift, _flag)               \
> +       GATE_MTK_FLAGS(_id, _name, _parent, &infra_ao4_cg_regs, _shift, \
> +               &mtk_clk_gate_ops_setclr, _flag)
> +
> +#define GATE_INFRA_AO4(_id, _name, _parent, _shift)    \
> +       GATE_INFRA_AO4_FLAGS(_id, _name, _parent, _shift, 0)
> +
> +/*
> + * infra_ao_sej is main clock is for secure engin with JTAG support.

                                                   ^ Typo?

> + * infra_133m_m_peri and infra_66m_m_peri are main clocks of peripheral.
> + * infra_device_apc and infra_device_apc_sync are for device access permission control module.

Since this is quite far from the clock definition, could you split this
comment and inline them before the actual definition instead? That would
make it easier to reference together.

> + */
> +static const struct mtk_gate infra_ao_clks[] = {
> +       /* INFRA_AO0 */
> +       GATE_INFRA_AO0(CLK_INFRA_AO_PMIC_TMR, "infra_ao_pmic_tmr", "top_pwrap_ulposc", 0),
> +       GATE_INFRA_AO0(CLK_INFRA_AO_PMIC_AP, "infra_ao_pmic_ap", "top_pwrap_ulposc", 1),
> +       GATE_INFRA_AO0(CLK_INFRA_AO_PMIC_MD, "infra_ao_pmic_md", "top_pwrap_ulposc", 2),
> +       GATE_INFRA_AO0(CLK_INFRA_AO_PMIC_CONN, "infra_ao_pmic_conn", "top_pwrap_ulposc", 3),
> +       GATE_INFRA_AO0_FLAGS(CLK_INFRA_AO_SEJ, "infra_ao_sej", "top_axi", 5, CLK_IS_CRITICAL),
> +       GATE_INFRA_AO0(CLK_INFRA_AO_APXGPT, "infra_ao_apxgpt", "top_axi", 6),
> +       GATE_INFRA_AO0(CLK_INFRA_AO_GCE, "infra_ao_gce", "top_axi", 8),
> +       GATE_INFRA_AO0(CLK_INFRA_AO_GCE2, "infra_ao_gce2", "top_axi", 9),
> +       GATE_INFRA_AO0(CLK_INFRA_AO_THERM, "infra_ao_therm", "top_axi", 10),
> +       GATE_INFRA_AO0(CLK_INFRA_AO_PWM_H, "infra_ao_pwm_h", "top_axi", 15),
> +       GATE_INFRA_AO0(CLK_INFRA_AO_PWM1, "infra_ao_pwm1", "top_pwm", 16),
> +       GATE_INFRA_AO0(CLK_INFRA_AO_PWM2, "infra_ao_pwm2", "top_pwm", 17),
> +       GATE_INFRA_AO0(CLK_INFRA_AO_PWM3, "infra_ao_pwm3", "top_pwm", 18),
> +       GATE_INFRA_AO0(CLK_INFRA_AO_PWM4, "infra_ao_pwm4", "top_pwm", 19),
> +       GATE_INFRA_AO0(CLK_INFRA_AO_PWM, "infra_ao_pwm", "top_pwm", 21),
> +       GATE_INFRA_AO0(CLK_INFRA_AO_UART0, "infra_ao_uart0", "top_uart", 22),
> +       GATE_INFRA_AO0(CLK_INFRA_AO_UART1, "infra_ao_uart1", "top_uart", 23),
> +       GATE_INFRA_AO0(CLK_INFRA_AO_UART2, "infra_ao_uart2", "top_uart", 24),
> +       GATE_INFRA_AO0(CLK_INFRA_AO_UART3, "infra_ao_uart3", "top_uart", 25),
> +       GATE_INFRA_AO0(CLK_INFRA_AO_UART4, "infra_ao_uart4", "top_uart", 26),
> +       GATE_INFRA_AO0(CLK_INFRA_AO_GCE_26M, "infra_ao_gce_26m", "clk26m", 27),
> +       GATE_INFRA_AO0(CLK_INFRA_AO_CQ_DMA_FPC, "infra_ao_cq_dma_fpc", "fpc", 28),
> +       GATE_INFRA_AO0(CLK_INFRA_AO_UART5, "infra_ao_uart5", "top_uart", 29),
> +       /* INFRA_AO1 */
> +       GATE_INFRA_AO1(CLK_INFRA_AO_HDMI_26M, "infra_ao_hdmi_26m", "clk26m", 0),
> +       GATE_INFRA_AO1(CLK_INFRA_AO_SPI0, "infra_ao_spi0", "top_spi", 1),
> +       GATE_INFRA_AO1(CLK_INFRA_AO_MSDC0, "infra_ao_msdc0", "top_msdc50_0_hclk", 2),
> +       GATE_INFRA_AO1(CLK_INFRA_AO_MSDC1, "infra_ao_msdc1", "top_axi", 4),
> +       GATE_INFRA_AO1(CLK_INFRA_AO_CG1_MSDC2, "infra_ao_cg1_msdc2", "top_axi", 5),
> +       GATE_INFRA_AO1(CLK_INFRA_AO_MSDC0_SRC, "infra_ao_msdc0_src", "top_msdc50_0", 6),
> +       GATE_INFRA_AO1(CLK_INFRA_AO_TRNG, "infra_ao_trng", "top_axi", 9),
> +       GATE_INFRA_AO1(CLK_INFRA_AO_AUXADC, "infra_ao_auxadc", "clk26m", 10),
> +       GATE_INFRA_AO1(CLK_INFRA_AO_CPUM, "infra_ao_cpum", "top_axi", 11),
> +       GATE_INFRA_AO1(CLK_INFRA_AO_HDMI_32K, "infra_ao_hdmi_32k", "clk32k", 12),
> +       GATE_INFRA_AO1(CLK_INFRA_AO_CEC_66M_H, "infra_ao_cec_66m_h", "top_axi", 13),
> +       GATE_INFRA_AO1(CLK_INFRA_AO_IRRX, "infra_ao_irrx", "top_axi", 14),
> +       GATE_INFRA_AO1(CLK_INFRA_AO_PCIE_TL_26M, "infra_ao_pcie_tl_26m", "clk26m", 15),
> +       GATE_INFRA_AO1(CLK_INFRA_AO_MSDC1_SRC, "infra_ao_msdc1_src", "top_msdc30_1", 16),
> +       GATE_INFRA_AO1(CLK_INFRA_AO_CEC_66M_B, "infra_ao_cec_66m_b", "top_axi", 17),
> +       GATE_INFRA_AO1(CLK_INFRA_AO_PCIE_TL_96M, "infra_ao_pcie_tl_96m", "top_tl", 18),
> +       GATE_INFRA_AO1_FLAGS(CLK_INFRA_AO_DEVICE_APC, "infra_ao_device_apc", "top_axi", 20,
> +               CLK_IS_CRITICAL),

Please align wrapped lines with opening parenthesis.

> +       GATE_INFRA_AO1(CLK_INFRA_AO_ECC_66M_H, "infra_ao_ecc_66m_h", "top_axi", 23),
> +       GATE_INFRA_AO1(CLK_INFRA_AO_DEBUGSYS, "infra_ao_debugsys", "top_axi", 24),
> +       GATE_INFRA_AO1(CLK_INFRA_AO_AUDIO, "infra_ao_audio", "top_axi", 25),
> +       GATE_INFRA_AO1(CLK_INFRA_AO_PCIE_TL_32K, "infra_ao_pcie_tl_32k", "clk32k", 26),
> +       GATE_INFRA_AO1(CLK_INFRA_AO_DBG_TRACE, "infra_ao_dbg_trace", "top_axi", 29),
> +       GATE_INFRA_AO1(CLK_INFRA_AO_DRAMC_F26M, "infra_ao_dramc_f26m", "clk26m", 31),
> +       /* INFRA_AO2 */
> +       GATE_INFRA_AO2(CLK_INFRA_AO_IRTX, "infra_ao_irtx", "top_axi", 0),
> +       GATE_INFRA_AO2(CLK_INFRA_AO_SSUSB, "infra_ao_ssusb", "top_usb_top", 1),
> +       GATE_INFRA_AO2(CLK_INFRA_AO_DISP_PWM, "infra_ao_disp_pwm", "top_disp_pwm0", 2),
> +       GATE_INFRA_AO2(CLK_INFRA_AO_CLDMA_B, "infra_ao_cldma_b", "top_axi", 3),
> +       GATE_INFRA_AO2(CLK_INFRA_AO_AUDIO_26M_B, "infra_ao_audio_26m_b", "clk26m", 4),
> +       GATE_INFRA_AO2(CLK_INFRA_AO_SPI1, "infra_ao_spi1", "top_spi", 6),
> +       GATE_INFRA_AO2(CLK_INFRA_AO_SPI2, "infra_ao_spi2", "top_spi", 9),
> +       GATE_INFRA_AO2(CLK_INFRA_AO_SPI3, "infra_ao_spi3", "top_spi", 10),
> +       GATE_INFRA_AO2(CLK_INFRA_AO_UNIPRO_SYS, "infra_ao_unipro_sys", "top_ufs", 11),
> +       GATE_INFRA_AO2(CLK_INFRA_AO_UNIPRO_TICK, "infra_ao_unipro_tick", "top_ufs_tick1us", 12),
> +       GATE_INFRA_AO2(CLK_INFRA_AO_UFS_MP_SAP_B, "infra_ao_ufs_mp_sap_b", "top_ufs_mp_sap_cfg",
> +               13),

same here.

> +       GATE_INFRA_AO2(CLK_INFRA_AO_PWRMCU, "infra_ao_pwrmcu", "top_pwrmcu", 15),
> +       GATE_INFRA_AO2(CLK_INFRA_AO_PWRMCU_BUS_H, "infra_ao_pwrmcu_bus_h", "top_axi", 17),
> +       GATE_INFRA_AO2(CLK_INFRA_AO_APDMA_B, "infra_ao_apdma_b", "top_axi", 18),
> +       GATE_INFRA_AO2(CLK_INFRA_AO_SPI4, "infra_ao_spi4", "top_spi", 25),
> +       GATE_INFRA_AO2(CLK_INFRA_AO_SPI5, "infra_ao_spi5", "top_spi", 26),
> +       GATE_INFRA_AO2(CLK_INFRA_AO_CQ_DMA, "infra_ao_cq_dma", "top_axi", 27),
> +       GATE_INFRA_AO2(CLK_INFRA_AO_AES_UFSFDE, "infra_ao_aes_ufsfde", "top_ufs", 28),
> +       GATE_INFRA_AO2(CLK_INFRA_AO_AES, "infra_ao_aes", "top_aes_ufsfde", 29),
> +       GATE_INFRA_AO2(CLK_INFRA_AO_UFS_TICK, "infra_ao_ufs_tick", "top_ufs_tick1us", 30),
> +       GATE_INFRA_AO2(CLK_INFRA_AO_SSUSB_XHCI, "infra_ao_ssusb_xhci", "top_ssusb_xhci", 31),
> +       /* INFRA_AO3 */
> +       GATE_INFRA_AO3(CLK_INFRA_AO_MSDC0_SELF, "infra_ao_msdc0f", "top_msdc50_0", 0),
> +       GATE_INFRA_AO3(CLK_INFRA_AO_MSDC1_SELF, "infra_ao_msdc1f", "top_msdc50_0", 1),
> +       GATE_INFRA_AO3(CLK_INFRA_AO_MSDC2_SELF, "infra_ao_msdc2f", "top_msdc50_0", 2),
> +       GATE_INFRA_AO3(CLK_INFRA_AO_I2S_DMA, "infra_ao_i2s_dma", "top_axi", 5),
> +       GATE_INFRA_AO3(CLK_INFRA_AO_AP_MSDC0, "infra_ao_ap_msdc0", "top_msdc50_0", 7),
> +       GATE_INFRA_AO3(CLK_INFRA_AO_MD_MSDC0, "infra_ao_md_msdc0", "top_msdc50_0", 8),
> +       GATE_INFRA_AO3(CLK_INFRA_AO_CG3_MSDC2, "infra_ao_cg3_msdc2", "top_msdc30_2", 9),
> +       GATE_INFRA_AO3(CLK_INFRA_AO_GCPU, "infra_ao_gcpu", "top_gcpu", 10),
> +       GATE_INFRA_AO3(CLK_INFRA_AO_PCIE_PERI_26M, "infra_ao_pcie_peri_26m", "clk26m", 15),
> +       GATE_INFRA_AO3(CLK_INFRA_AO_GCPU_66M_B, "infra_ao_gcpu_66m_b", "top_axi", 16),
> +       GATE_INFRA_AO3(CLK_INFRA_AO_GCPU_133M_B, "infra_ao_gcpu_133m_b", "top_axi", 17),
> +       GATE_INFRA_AO3(CLK_INFRA_AO_DISP_PWM1, "infra_ao_disp_pwm1", "top_disp_pwm1", 20),
> +       GATE_INFRA_AO3(CLK_INFRA_AO_FBIST2FPC, "infra_ao_fbist2fpc", "top_msdc50_0", 24),
> +       GATE_INFRA_AO3_FLAGS(CLK_INFRA_AO_DEVICE_APC_SYNC, "infra_ao_device_apc_sync", "top_axi",
> +               25, CLK_IS_CRITICAL),

And here.

> +       GATE_INFRA_AO3(CLK_INFRA_AO_PCIE_P1_PERI_26M, "infra_ao_pcie_p1_peri_26m", "clk26m", 26),
> +       GATE_INFRA_AO3(CLK_INFRA_AO_SPIS0, "infra_ao_spis0", "top_spis", 28),
> +       GATE_INFRA_AO3(CLK_INFRA_AO_SPIS1, "infra_ao_spis1", "top_spis", 29),
> +       /* INFRA_AO4 */
> +       GATE_INFRA_AO4_FLAGS(CLK_INFRA_AO_133M_M_PERI, "infra_ao_133m_m_peri", "top_axi", 0,
> +               CLK_IS_CRITICAL),
> +       GATE_INFRA_AO4_FLAGS(CLK_INFRA_AO_66M_M_PERI, "infra_ao_66m_m_peri", "top_spi", 1,
> +               CLK_IS_CRITICAL),
> +       GATE_INFRA_AO4(CLK_INFRA_AO_PCIE_PL_P_250M_P0, "infra_ao_pcie_pl_p_250m_p0", "pextp_pipe",
> +               7),

And these.

> +       GATE_INFRA_AO4(CLK_INFRA_AO_PCIE_PL_P_250M_P1, "infra_ao_pcie_pl_p_250m_p1",
> +               "ssusb_u3phy_p1_p_p0", 8),
> +       GATE_INFRA_AO4(CLK_INFRA_AO_PCIE_P1_TL_96M, "infra_ao_pcie_p1_tl_96m", "top_tl_p1", 17),
> +       GATE_INFRA_AO4(CLK_INFRA_AO_AES_MSDCFDE_0P, "infra_ao_aes_msdcfde_0p", "top_aes_msdcfde",
> +               18),

Ditto.

> +       GATE_INFRA_AO4(CLK_INFRA_AO_UFS_TX_SYMBOL, "infra_ao_ufs_tx_symbol", "ufs_tx_symbol", 22),
> +       GATE_INFRA_AO4(CLK_INFRA_AO_UFS_RX_SYMBOL, "infra_ao_ufs_rx_symbol", "ufs_rx_symbol", 23),
> +       GATE_INFRA_AO4(CLK_INFRA_AO_UFS_RX_SYMBOL1, "infra_ao_ufs_rx_symbol1", "ufs_rx_symbol1",
> +               24),

Ditto.

Since this is already going past 80 characters and close to 100, I would
just keep them on the same line. Having just one or two fields wrapped
on a few lines actually makes it harder to read. I would probably keep
the "CLK_INFRA_AO_DEVICE_APC_SYNC" line wrapped, since that line is way
longer.


Regards
ChenYu

> +       GATE_INFRA_AO4(CLK_INFRA_AO_PERI_UFS_MEM_SUB, "infra_ao_peri_ufs_mem_sub", "mem_466m", 31),
> +};
> +
> +static const struct mtk_clk_desc infra_ao_desc = {
> +       .clks = infra_ao_clks,
> +       .num_clks = ARRAY_SIZE(infra_ao_clks),
> +};
> +
> +static const struct of_device_id of_match_clk_mt8195_infra_ao[] = {
> +       {
> +               .compatible = "mediatek,mt8195-infracfg_ao",
> +               .data = &infra_ao_desc,
> +       }, {
> +               /* sentinel */
> +       }
> +};
> +
> +static struct platform_driver clk_mt8195_infra_ao_drv = {
> +       .probe = mtk_clk_simple_probe,
> +       .driver = {
> +               .name = "clk-mt8195-infra_ao",
> +               .of_match_table = of_match_clk_mt8195_infra_ao,
> +       },
> +};
> +builtin_platform_driver(clk_mt8195_infra_ao_drv);
> --
> 2.18.0
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