From 0899431f95a7a695f342527548b24ffd902c68ab Mon Sep 17 00:00:00 2001 From: Dario Binacchi Date: Sun, 6 Jun 2021 22:22:53 +0200 Subject: clk: ti: add am33xx/am43xx spread spectrum clock support The patch enables spread spectrum clocking (SSC) for MPU and LCD PLLs. As reported by the TI spruh73x/spruhl7x RM, SSC is only supported for the DISP/LCD and MPU PLLs on am33xx/am43xx. SSC is not supported for DDR, PER, and CORE PLLs. Calculating the required values and setting the registers accordingly was taken from the set_mpu_spreadspectrum routine contained in the arch/arm/mach-omap2/am33xx/clock_am33xx.c file of the u-boot project. In locked condition, DPLL output clock = CLKINP *[M/N]. In case of SSC enabled, the reference manual explains that there is a restriction of range of M values. Since the omap2_dpll_round_rate routine attempts to select the minimum possible N, the value of M obtained is not guaranteed to be within the range required. With the new "ti,min-div" parameter it is possible to increase N and consequently M to satisfy the constraint imposed by SSC. Signed-off-by: Dario Binacchi Reviewed-by: Tero Kristo Link: https://lore.kernel.org/r/20210606202253.31649-6-dariobin@libero.it Signed-off-by: Stephen Boyd --- include/linux/clk/ti.h | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) (limited to 'include') diff --git a/include/linux/clk/ti.h b/include/linux/clk/ti.h index c62f6fa6763d..3486f20a3753 100644 --- a/include/linux/clk/ti.h +++ b/include/linux/clk/ti.h @@ -63,6 +63,17 @@ struct clk_omap_reg { * @auto_recal_bit: bitshift of the driftguard enable bit in @control_reg * @recal_en_bit: bitshift of the PRM_IRQENABLE_* bit for recalibration IRQs * @recal_st_bit: bitshift of the PRM_IRQSTATUS_* bit for recalibration IRQs + * @ssc_deltam_reg: register containing the DPLL SSC frequency spreading + * @ssc_modfreq_reg: register containing the DPLL SSC modulation frequency + * @ssc_modfreq_mant_mask: mask of the mantissa component in @ssc_modfreq_reg + * @ssc_modfreq_exp_mask: mask of the exponent component in @ssc_modfreq_reg + * @ssc_enable_mask: mask of the DPLL SSC enable bit in @control_reg + * @ssc_downspread_mask: mask of the DPLL SSC low frequency only bit in + * @control_reg + * @ssc_modfreq: the DPLL SSC frequency modulation in kHz + * @ssc_deltam: the DPLL SSC frequency spreading in permille (10th of percent) + * @ssc_downspread: require the only low frequency spread of the DPLL in SSC + * mode * @flags: DPLL type/features (see below) * * Possible values for @flags: @@ -110,6 +121,17 @@ struct dpll_data { u8 auto_recal_bit; u8 recal_en_bit; u8 recal_st_bit; + struct clk_omap_reg ssc_deltam_reg; + struct clk_omap_reg ssc_modfreq_reg; + u32 ssc_deltam_int_mask; + u32 ssc_deltam_frac_mask; + u32 ssc_modfreq_mant_mask; + u32 ssc_modfreq_exp_mask; + u32 ssc_enable_mask; + u32 ssc_downspread_mask; + u32 ssc_modfreq; + u32 ssc_deltam; + bool ssc_downspread; u8 flags; }; -- cgit v1.2.3 From 403921373799a133e41b59cb730e2c4239663f51 Mon Sep 17 00:00:00 2001 From: Lad Prabhakar Date: Wed, 9 Jun 2021 16:32:25 +0100 Subject: dt-bindings: clock: Add r9a07g044 CPG Clock Definitions Define RZ/G2L (R9A07G044) Clock Pulse Generator Core Clock and module clock outputs, as listed in Table 8.3 ("Clock List") of the RZ/G2L Hardware User's Manual (Rev.0.42, Feb.2021). Signed-off-by: Lad Prabhakar Reviewed-by: Biju Das Link: https://lore.kernel.org/r/20210609153230.6967-7-prabhakar.mahadev-lad.rj@bp.renesas.com Signed-off-by: Geert Uytterhoeven --- include/dt-bindings/clock/r9a07g044-cpg.h | 89 +++++++++++++++++++++++++++++++ 1 file changed, 89 insertions(+) create mode 100644 include/dt-bindings/clock/r9a07g044-cpg.h (limited to 'include') diff --git a/include/dt-bindings/clock/r9a07g044-cpg.h b/include/dt-bindings/clock/r9a07g044-cpg.h new file mode 100644 index 000000000000..1d8986563fc5 --- /dev/null +++ b/include/dt-bindings/clock/r9a07g044-cpg.h @@ -0,0 +1,89 @@ +/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) + * + * Copyright (C) 2021 Renesas Electronics Corp. + */ +#ifndef __DT_BINDINGS_CLOCK_R9A07G044_CPG_H__ +#define __DT_BINDINGS_CLOCK_R9A07G044_CPG_H__ + +#include + +/* R9A07G044 CPG Core Clocks */ +#define R9A07G044_CLK_I 0 +#define R9A07G044_CLK_I2 1 +#define R9A07G044_CLK_G 2 +#define R9A07G044_CLK_S0 3 +#define R9A07G044_CLK_S1 4 +#define R9A07G044_CLK_SPI0 5 +#define R9A07G044_CLK_SPI1 6 +#define R9A07G044_CLK_SD0 7 +#define R9A07G044_CLK_SD1 8 +#define R9A07G044_CLK_M0 9 +#define R9A07G044_CLK_M1 10 +#define R9A07G044_CLK_M2 11 +#define R9A07G044_CLK_M3 12 +#define R9A07G044_CLK_M4 13 +#define R9A07G044_CLK_HP 14 +#define R9A07G044_CLK_TSU 15 +#define R9A07G044_CLK_ZT 16 +#define R9A07G044_CLK_P0 17 +#define R9A07G044_CLK_P1 18 +#define R9A07G044_CLK_P2 19 +#define R9A07G044_CLK_AT 20 +#define R9A07G044_OSCCLK 21 + +/* R9A07G044 Module Clocks */ +#define R9A07G044_CLK_GIC600 0 +#define R9A07G044_CLK_IA55 1 +#define R9A07G044_CLK_SYC 2 +#define R9A07G044_CLK_DMAC 3 +#define R9A07G044_CLK_SYSC 4 +#define R9A07G044_CLK_MTU 5 +#define R9A07G044_CLK_GPT 6 +#define R9A07G044_CLK_ETH0 7 +#define R9A07G044_CLK_ETH1 8 +#define R9A07G044_CLK_I2C0 9 +#define R9A07G044_CLK_I2C1 10 +#define R9A07G044_CLK_I2C2 11 +#define R9A07G044_CLK_I2C3 12 +#define R9A07G044_CLK_SCIF0 13 +#define R9A07G044_CLK_SCIF1 14 +#define R9A07G044_CLK_SCIF2 15 +#define R9A07G044_CLK_SCIF3 16 +#define R9A07G044_CLK_SCIF4 17 +#define R9A07G044_CLK_SCI0 18 +#define R9A07G044_CLK_SCI1 19 +#define R9A07G044_CLK_GPIO 20 +#define R9A07G044_CLK_SDHI0 21 +#define R9A07G044_CLK_SDHI1 22 +#define R9A07G044_CLK_USB0 23 +#define R9A07G044_CLK_USB1 24 +#define R9A07G044_CLK_CANFD 25 +#define R9A07G044_CLK_SSI0 26 +#define R9A07G044_CLK_SSI1 27 +#define R9A07G044_CLK_SSI2 28 +#define R9A07G044_CLK_SSI3 29 +#define R9A07G044_CLK_MHU 30 +#define R9A07G044_CLK_OSTM0 31 +#define R9A07G044_CLK_OSTM1 32 +#define R9A07G044_CLK_OSTM2 33 +#define R9A07G044_CLK_WDT0 34 +#define R9A07G044_CLK_WDT1 35 +#define R9A07G044_CLK_WDT2 36 +#define R9A07G044_CLK_WDT_PON 37 +#define R9A07G044_CLK_GPU 38 +#define R9A07G044_CLK_ISU 39 +#define R9A07G044_CLK_H264 40 +#define R9A07G044_CLK_CRU 41 +#define R9A07G044_CLK_MIPI_DSI 42 +#define R9A07G044_CLK_LCDC 43 +#define R9A07G044_CLK_SRC 44 +#define R9A07G044_CLK_RSPI0 45 +#define R9A07G044_CLK_RSPI1 46 +#define R9A07G044_CLK_RSPI2 47 +#define R9A07G044_CLK_ADC 48 +#define R9A07G044_CLK_TSU_PCLK 49 +#define R9A07G044_CLK_SPI 50 +#define R9A07G044_CLK_MIPI_DSI_V 51 +#define R9A07G044_CLK_MIPI_DSI_PIN 52 + +#endif /* __DT_BINDINGS_CLOCK_R9A07G044_CPG_H__ */ -- cgit v1.2.3