diff options
Diffstat (limited to 'drivers/clk/renesas/r9a06g032-clocks.c')
| -rw-r--r-- | drivers/clk/renesas/r9a06g032-clocks.c | 1397 |
1 files changed, 1397 insertions, 0 deletions
diff --git a/drivers/clk/renesas/r9a06g032-clocks.c b/drivers/clk/renesas/r9a06g032-clocks.c new file mode 100644 index 0000000000..55db63c704 --- /dev/null +++ b/drivers/clk/renesas/r9a06g032-clocks.c @@ -0,0 +1,1397 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * R9A06G032 clock driver + * + * Copyright (C) 2018 Renesas Electronics Europe Limited + * + * Michel Pollet <michel.pollet@bp.renesas.com>, <buserror@gmail.com> + */ + +#include <linux/clk.h> +#include <linux/clk-provider.h> +#include <linux/delay.h> +#include <linux/init.h> +#include <linux/io.h> +#include <linux/kernel.h> +#include <linux/math64.h> +#include <linux/of.h> +#include <linux/of_address.h> +#include <linux/of_platform.h> +#include <linux/platform_device.h> +#include <linux/pm_clock.h> +#include <linux/pm_domain.h> +#include <linux/slab.h> +#include <linux/soc/renesas/r9a06g032-sysctrl.h> +#include <linux/spinlock.h> +#include <dt-bindings/clock/r9a06g032-sysctrl.h> + +#define R9A06G032_SYSCTRL_USB 0x00 +#define R9A06G032_SYSCTRL_USB_H2MODE (1<<1) +#define R9A06G032_SYSCTRL_DMAMUX 0xA0 + +/** + * struct regbit - describe one bit in a register + * @reg: offset of register relative to base address, + * expressed in units of 32-bit words (not bytes), + * @bit: which bit (0 to 31) in the register + * + * This structure is used to compactly encode the location + * of a single bit in a register. Five bits are needed to + * encode the bit number. With uint16_t data type, this + * leaves 11 bits to encode a register offset up to 2047. + * + * Since registers are aligned on 32-bit boundaries, the + * offset will be specified in 32-bit words rather than bytes. + * This allows encoding an offset up to 0x1FFC (8188) bytes. + * + * Helper macro RB() takes care of converting the register + * offset from bytes to 32-bit words. + */ +struct regbit { + u16 bit:5; + u16 reg:11; +}; + +#define RB(_reg, _bit) ((struct regbit) { \ + .reg = (_reg) / 4, \ + .bit = (_bit) \ +}) + +/** + * struct r9a06g032_gate - clock-related control bits + * @gate: clock enable/disable + * @reset: clock module reset (active low) + * @ready: enables NoC forwarding of read/write requests to device, + * (eg. device is ready to handle read/write requests) + * @midle: request to idle the NoC interconnect + * + * Each of these fields describes a single bit in a register, + * which controls some aspect of clock gating. The @gate field + * is mandatory, this one enables/disables the clock. The + * other fields are optional, with zero indicating "not used". + * + * In most cases there is a @reset bit which needs to be + * de-asserted to bring the module out of reset. + * + * Modules may also need to signal when they are @ready to + * handle requests (read/writes) from the NoC interconnect. + * + * Similarly, the @midle bit is used to idle the master. + */ +struct r9a06g032_gate { + struct regbit gate, reset, ready, midle; + /* Unused fields omitted to save space */ + /* struct regbit scon, mirack, mistat */; +}; + +enum gate_type { + K_GATE = 0, /* gate which enable/disable */ + K_FFC, /* fixed factor clock */ + K_DIV, /* divisor */ + K_BITSEL, /* special for UARTs */ + K_DUALGATE /* special for UARTs */ +}; + +/** + * struct r9a06g032_clkdesc - describe a single clock + * @name: string describing this clock + * @managed: boolean indicating if this clock should be + * started/stopped as part of power management + * @type: see enum @gate_type + * @index: the ID of this clock element + * @source: the ID+1 of the parent clock element. + * Root clock uses ID of ~0 (PARENT_ID); + * @gate: clock enable/disable + * @div_min: smallest permitted clock divider + * @div_max: largest permitted clock divider + * @reg: clock divider register offset, in 32-bit words + * @div_table: optional list of fixed clock divider values; + * must be in ascending order, zero for unused + * @div: divisor for fixed-factor clock + * @mul: multiplier for fixed-factor clock + * @group: UART group, 0=UART0/1/2, 1=UART3/4/5/6/7 + * @sel: select either g1/r1 or g2/r2 as clock source + * @g1: 1st source gate (clock enable/disable) + * @r1: 1st source reset (module reset) + * @g2: 2nd source gate (clock enable/disable) + * @r2: 2nd source reset (module reset) + * + * Describes a single element in the clock tree hierarchy. + * As there are quite a large number of clock elements, this + * structure is packed tightly to conserve space. + */ +struct r9a06g032_clkdesc { + const char *name; + uint32_t managed:1; + enum gate_type type:3; + uint32_t index:8; + uint32_t source:8; /* source index + 1 (0 == none) */ + union { + /* type = K_GATE */ + struct r9a06g032_gate gate; + /* type = K_DIV */ + struct { + unsigned int div_min:10, div_max:10, reg:10; + u16 div_table[4]; + }; + /* type = K_FFC */ + struct { + u16 div, mul; + }; + /* type = K_DUALGATE */ + struct { + uint16_t group:1; + struct regbit sel, g1, r1, g2, r2; + } dual; + }; +}; + +/* + * The last three arguments are not currently used, + * but are kept in the r9a06g032_clocks table below. + */ +#define I_GATE(_clk, _rst, _rdy, _midle, _scon, _mirack, _mistat) { \ + .gate = _clk, \ + .reset = _rst, \ + .ready = _rdy, \ + .midle = _midle, \ + /* .scon = _scon, */ \ + /* .mirack = _mirack, */ \ + /* .mistat = _mistat */ \ +} +#define D_GATE(_idx, _n, _src, ...) { \ + .type = K_GATE, \ + .index = R9A06G032_##_idx, \ + .source = 1 + R9A06G032_##_src, \ + .name = _n, \ + .gate = I_GATE(__VA_ARGS__) \ +} +#define D_MODULE(_idx, _n, _src, ...) { \ + .type = K_GATE, \ + .index = R9A06G032_##_idx, \ + .source = 1 + R9A06G032_##_src, \ + .name = _n, \ + .managed = 1, \ + .gate = I_GATE(__VA_ARGS__) \ +} +#define D_ROOT(_idx, _n, _mul, _div) { \ + .type = K_FFC, \ + .index = R9A06G032_##_idx, \ + .name = _n, \ + .div = _div, \ + .mul = _mul \ +} +#define D_FFC(_idx, _n, _src, _div) { \ + .type = K_FFC, \ + .index = R9A06G032_##_idx, \ + .source = 1 + R9A06G032_##_src, \ + .name = _n, \ + .div = _div, \ + .mul = 1 \ +} +#define D_DIV(_idx, _n, _src, _reg, _min, _max, ...) { \ + .type = K_DIV, \ + .index = R9A06G032_##_idx, \ + .source = 1 + R9A06G032_##_src, \ + .name = _n, \ + .reg = _reg, \ + .div_min = _min, \ + .div_max = _max, \ + .div_table = { __VA_ARGS__ } \ +} +#define D_UGATE(_idx, _n, _src, _g, _g1, _r1, _g2, _r2) { \ + .type = K_DUALGATE, \ + .index = R9A06G032_##_idx, \ + .source = 1 + R9A06G032_##_src, \ + .name = _n, \ + .dual = { \ + .group = _g, \ + .g1 = _g1, \ + .r1 = _r1, \ + .g2 = _g2, \ + .r2 = _r2 \ + }, \ +} + +/* Internal clock IDs */ +#define R9A06G032_CLKOUT 0 +#define R9A06G032_CLKOUT_D10 2 +#define R9A06G032_CLKOUT_D16 3 +#define R9A06G032_CLKOUT_D160 4 +#define R9A06G032_CLKOUT_D1OR2 5 +#define R9A06G032_CLKOUT_D20 6 +#define R9A06G032_CLKOUT_D40 7 +#define R9A06G032_CLKOUT_D5 8 +#define R9A06G032_CLKOUT_D8 9 +#define R9A06G032_DIV_ADC 10 +#define R9A06G032_DIV_I2C 11 +#define R9A06G032_DIV_NAND 12 +#define R9A06G032_DIV_P1_PG 13 +#define R9A06G032_DIV_P2_PG 14 +#define R9A06G032_DIV_P3_PG 15 +#define R9A06G032_DIV_P4_PG 16 +#define R9A06G032_DIV_P5_PG 17 +#define R9A06G032_DIV_P6_PG 18 +#define R9A06G032_DIV_QSPI0 19 +#define R9A06G032_DIV_QSPI1 20 +#define R9A06G032_DIV_REF_SYNC 21 +#define R9A06G032_DIV_SDIO0 22 +#define R9A06G032_DIV_SDIO1 23 +#define R9A06G032_DIV_SWITCH 24 +#define R9A06G032_DIV_UART 25 +#define R9A06G032_DIV_MOTOR 64 +#define R9A06G032_CLK_DDRPHY_PLLCLK_D4 78 +#define R9A06G032_CLK_ECAT100_D4 79 +#define R9A06G032_CLK_HSR100_D2 80 +#define R9A06G032_CLK_REF_SYNC_D4 81 +#define R9A06G032_CLK_REF_SYNC_D8 82 +#define R9A06G032_CLK_SERCOS100_D2 83 +#define R9A06G032_DIV_CA7 84 + +#define R9A06G032_UART_GROUP_012 154 +#define R9A06G032_UART_GROUP_34567 155 + +#define R9A06G032_CLOCK_COUNT (R9A06G032_UART_GROUP_34567 + 1) + +static const struct r9a06g032_clkdesc r9a06g032_clocks[] = { + D_ROOT(CLKOUT, "clkout", 25, 1), + D_ROOT(CLK_PLL_USB, "clk_pll_usb", 12, 10), + D_FFC(CLKOUT_D10, "clkout_d10", CLKOUT, 10), + D_FFC(CLKOUT_D16, "clkout_d16", CLKOUT, 16), + D_FFC(CLKOUT_D160, "clkout_d160", CLKOUT, 160), + D_DIV(CLKOUT_D1OR2, "clkout_d1or2", CLKOUT, 0, 1, 2), + D_FFC(CLKOUT_D20, "clkout_d20", CLKOUT, 20), + D_FFC(CLKOUT_D40, "clkout_d40", CLKOUT, 40), + D_FFC(CLKOUT_D5, "clkout_d5", CLKOUT, 5), + D_FFC(CLKOUT_D8, "clkout_d8", CLKOUT, 8), + D_DIV(DIV_ADC, "div_adc", CLKOUT, 77, 50, 250), + D_DIV(DIV_I2C, "div_i2c", CLKOUT, 78, 12, 16), + D_DIV(DIV_NAND, "div_nand", CLKOUT, 82, 12, 32), + D_DIV(DIV_P1_PG, "div_p1_pg", CLKOUT, 68, 12, 200), + D_DIV(DIV_P2_PG, "div_p2_pg", CLKOUT, 62, 12, 128), + D_DIV(DIV_P3_PG, "div_p3_pg", CLKOUT, 64, 8, 128), + D_DIV(DIV_P4_PG, "div_p4_pg", CLKOUT, 66, 8, 128), + D_DIV(DIV_P5_PG, "div_p5_pg", CLKOUT, 71, 10, 40), + D_DIV(DIV_P6_PG, "div_p6_pg", CLKOUT, 18, 12, 64), + D_DIV(DIV_QSPI0, "div_qspi0", CLKOUT, 73, 3, 7), + D_DIV(DIV_QSPI1, "div_qspi1", CLKOUT, 25, 3, 7), + D_DIV(DIV_REF_SYNC, "div_ref_sync", CLKOUT, 56, 2, 16, 2, 4, 8, 16), + D_DIV(DIV_SDIO0, "div_sdio0", CLKOUT, 74, 20, 128), + D_DIV(DIV_SDIO1, "div_sdio1", CLKOUT, 75, 20, 128), + D_DIV(DIV_SWITCH, "div_switch", CLKOUT, 37, 5, 40), + D_DIV(DIV_UART, "div_uart", CLKOUT, 79, 12, 128), + D_GATE(CLK_25_PG4, "clk_25_pg4", CLKOUT_D40, RB(0xe8, 9), + RB(0xe8, 10), RB(0xe8, 11), RB(0x00, 0), + RB(0x15c, 3), RB(0x00, 0), RB(0x00, 0)), + D_GATE(CLK_25_PG5, "clk_25_pg5", CLKOUT_D40, RB(0xe8, 12), + RB(0xe8, 13), RB(0xe8, 14), RB(0x00, 0), + RB(0x15c, 4), RB(0x00, 0), RB(0x00, 0)), + D_GATE(CLK_25_PG6, "clk_25_pg6", CLKOUT_D40, RB(0xe8, 15), + RB(0xe8, 16), RB(0xe8, 17), RB(0x00, 0), + RB(0x15c, 5), RB(0x00, 0), RB(0x00, 0)), + D_GATE(CLK_25_PG7, "clk_25_pg7", CLKOUT_D40, RB(0xe8, 18), + RB(0xe8, 19), RB(0xe8, 20), RB(0x00, 0), + RB(0x15c, 6), RB(0x00, 0), RB(0x00, 0)), + D_GATE(CLK_25_PG8, "clk_25_pg8", CLKOUT_D40, RB(0xe8, 21), + RB(0xe8, 22), RB(0xe8, 23), RB(0x00, 0), + RB(0x15c, 7), RB(0x00, 0), RB(0x00, 0)), + D_GATE(CLK_ADC, "clk_adc", DIV_ADC, RB(0x3c, 10), + RB(0x3c, 11), RB(0x00, 0), RB(0x00, 0), + RB(0x00, 0), RB(0x00, 0), RB(0x00, 0)), + D_GATE(CLK_ECAT100, "clk_ecat100", CLKOUT_D10, RB(0x80, 5), + RB(0x00, 0), RB(0x00, 0), RB(0x00, 0), + RB(0x00, 0), RB(0x00, 0), RB(0x00, 0)), + D_GATE(CLK_HSR100, "clk_hsr100", CLKOUT_D10, RB(0x90, 3), + RB(0x00, 0), RB(0x00, 0), RB(0x00, 0), + RB(0x00, 0), RB(0x00, 0), RB(0x00, 0)), + D_GATE(CLK_I2C0, "clk_i2c0", DIV_I2C, RB(0x3c, 6), + RB(0x3c, 7), RB(0x00, 0), RB(0x00, 0), + RB(0x00, 0), RB(0x00, 0), RB(0x00, 0)), + D_GATE(CLK_I2C1, "clk_i2c1", DIV_I2C, RB(0x3c, 8), + RB(0x3c, 9), RB(0x00, 0), RB(0x00, 0), + RB(0x00, 0), RB(0x00, 0), RB(0x00, 0)), + D_GATE(CLK_MII_REF, "clk_mii_ref", CLKOUT_D40, RB(0x68, 2), + RB(0x00, 0), RB(0x00, 0), RB(0x00, 0), + RB(0x00, 0), RB(0x00, 0), RB(0x00, 0)), + D_GATE(CLK_NAND, "clk_nand", DIV_NAND, RB(0x50, 4), + RB(0x50, 5), RB(0x00, 0), RB(0x00, 0), + RB(0x00, 0), RB(0x00, 0), RB(0x00, 0)), + D_GATE(CLK_NOUSBP2_PG6, "clk_nousbp2_pg6", DIV_P2_PG, RB(0xec, 20), + RB(0xec, 21), RB(0x00, 0), RB(0x00, 0), + RB(0x00, 0), RB(0x00, 0), RB(0x00, 0)), + D_GATE(CLK_P1_PG2, "clk_p1_pg2", DIV_P1_PG, RB(0x10c, 2), + RB(0x10c, 3), RB(0x00, 0), RB(0x00, 0), + RB(0x00, 0), RB(0x00, 0), RB(0x00, 0)), + D_GATE(CLK_P1_PG3, "clk_p1_pg3", DIV_P1_PG, RB(0x10c, 4), + RB(0x10c, 5), RB(0x00, 0), RB(0x00, 0), + RB(0x00, 0), RB(0x00, 0), RB(0x00, 0)), + D_GATE(CLK_P1_PG4, "clk_p1_pg4", DIV_P1_PG, RB(0x10c, 6), + RB(0x10c, 7), RB(0x00, 0), RB(0x00, 0), + RB(0x00, 0), RB(0x00, 0), RB(0x00, 0)), + D_GATE(CLK_P4_PG3, "clk_p4_pg3", DIV_P4_PG, RB(0x104, 4), + RB(0x104, 5), RB(0x00, 0), RB(0x00, 0), + RB(0x00, 0), RB(0x00, 0), RB(0x00, 0)), + D_GATE(CLK_P4_PG4, "clk_p4_pg4", DIV_P4_PG, RB(0x104, 6), + RB(0x104, 7), RB(0x00, 0), RB(0x00, 0), + RB(0x00, 0), RB(0x00, 0), RB(0x00, 0)), + D_GATE(CLK_P6_PG1, "clk_p6_pg1", DIV_P6_PG, RB(0x114, 0), + RB(0x114, 1), RB(0x114, 2), RB(0x00, 0), + RB(0x16c, 0), RB(0x00, 0), RB(0x00, 0)), + D_GATE(CLK_P6_PG2, "clk_p6_pg2", DIV_P6_PG, RB(0x114, 3), + RB(0x114, 4), RB(0x114, 5), RB(0x00, 0), + RB(0x16c, 1), RB(0x00, 0), RB(0x00, 0)), + D_GATE(CLK_P6_PG3, "clk_p6_pg3", DIV_P6_PG, RB(0x114, 6), + RB(0x114, 7), RB(0x114, 8), RB(0x00, 0), + RB(0x16c, 2), RB(0x00, 0), RB(0x00, 0)), + D_GATE(CLK_P6_PG4, "clk_p6_pg4", DIV_P6_PG, RB(0x114, 9), + RB(0x114, 10), RB(0x114, 11), RB(0x00, 0), + RB(0x16c, 3), RB(0x00, 0), RB(0x00, 0)), + D_MODULE(CLK_PCI_USB, "clk_pci_usb", CLKOUT_D40, RB(0x1c, 6), + RB(0x00, 0), RB(0x00, 0), RB(0x00, 0), + RB(0x00, 0), RB(0x00, 0), RB(0x00, 0)), + D_GATE(CLK_QSPI0, "clk_qspi0", DIV_QSPI0, RB(0x54, 4), + RB(0x54, 5), RB(0x00, 0), RB(0x00, 0), + RB(0x00, 0), RB(0x00, 0), RB(0x00, 0)), + D_GATE(CLK_QSPI1, "clk_qspi1", DIV_QSPI1, RB(0x90, 4), + RB(0x90, 5), RB(0x00, 0), RB(0x00, 0), + RB(0x00, 0), RB(0x00, 0), RB(0x00, 0)), + D_GATE(CLK_RGMII_REF, "clk_rgmii_ref", CLKOUT_D8, RB(0x68, 0), + RB(0x00, 0), RB(0x00, 0), RB(0x00, 0), + RB(0x00, 0), RB(0x00, 0), RB(0x00, 0)), + D_GATE(CLK_RMII_REF, "clk_rmii_ref", CLKOUT_D20, RB(0x68, 1), + RB(0x00, 0), RB(0x00, 0), RB(0x00, 0), + RB(0x00, 0), RB(0x00, 0), RB(0x00, 0)), + D_GATE(CLK_SDIO0, "clk_sdio0", DIV_SDIO0, RB(0x0c, 4), + RB(0x00, 0), RB(0x00, 0), RB(0x00, 0), + RB(0x00, 0), RB(0x00, 0), RB(0x00, 0)), + D_GATE(CLK_SDIO1, "clk_sdio1", DIV_SDIO1, RB(0xc8, 4), + RB(0x00, 0), RB(0x00, 0), RB(0x00, 0), + RB(0x00, 0), RB(0x00, 0), RB(0x00, 0)), + D_GATE(CLK_SERCOS100, "clk_sercos100", CLKOUT_D10, RB(0x84, 5), + RB(0x00, 0), RB(0x00, 0), RB(0x00, 0), + RB(0x00, 0), RB(0x00, 0), RB(0x00, 0)), + D_GATE(CLK_SLCD, "clk_slcd", DIV_P1_PG, RB(0x10c, 0), + RB(0x10c, 1), RB(0x00, 0), RB(0x00, 0), + RB(0x00, 0), RB(0x00, 0), RB(0x00, 0)), + D_GATE(CLK_SPI0, "clk_spi0", DIV_P3_PG, RB(0xfc, 0), + RB(0xfc, 1), RB(0x00, 0), RB(0x00, 0), + RB(0x00, 0), RB(0x00, 0), RB(0x00, 0)), + D_GATE(CLK_SPI1, "clk_spi1", DIV_P3_PG, RB(0xfc, 2), + RB(0xfc, 3), RB(0x00, 0), RB(0x00, 0), + RB(0x00, 0), RB(0x00, 0), RB(0x00, 0)), + D_GATE(CLK_SPI2, "clk_spi2", DIV_P3_PG, RB(0xfc, 4), + RB(0xfc, 5), RB(0x00, 0), RB(0x00, 0), + RB(0x00, 0), RB(0x00, 0), RB(0x00, 0)), + D_GATE(CLK_SPI3, "clk_spi3", DIV_P3_PG, RB(0xfc, 6), + RB(0xfc, 7), RB(0x00, 0), RB(0x00, 0), + RB(0x00, 0), RB(0x00, 0), RB(0x00, 0)), + D_GATE(CLK_SPI4, "clk_spi4", DIV_P4_PG, RB(0x104, 0), + RB(0x104, 1), RB(0x00, 0), RB(0x00, 0), + RB(0x00, 0), RB(0x00, 0), RB(0x00, 0)), + D_GATE(CLK_SPI5, "clk_spi5", DIV_P4_PG, RB(0x104, 2), + RB(0x104, 3), RB(0x00, 0), RB(0x00, 0), + RB(0x00, 0), RB(0x00, 0), RB(0x00, 0)), + D_GATE(CLK_SWITCH, "clk_switch", DIV_SWITCH, RB(0x130, 2), + RB(0x130, 3), RB(0x00, 0), RB(0x00, 0), + RB(0x00, 0), RB(0x00, 0), RB(0x00, 0)), + D_DIV(DIV_MOTOR, "div_motor", CLKOUT_D5, 84, 2, 8), + D_MODULE(HCLK_ECAT125, "hclk_ecat125", CLKOUT_D8, RB(0x80, 0), + RB(0x80, 1), RB(0x00, 0), RB(0x80, 2), + RB(0x00, 0), RB(0x88, 0), RB(0x88, 1)), + D_MODULE(HCLK_PINCONFIG, "hclk_pinconfig", CLKOUT_D40, RB(0xe8, 0), + RB(0xe8, 1), RB(0xe8, 2), RB(0x00, 0), + RB(0x15c, 0), RB(0x00, 0), RB(0x00, 0)), + D_MODULE(HCLK_SERCOS, "hclk_sercos", CLKOUT_D10, RB(0x84, 0), + RB(0x84, 2), RB(0x00, 0), RB(0x84, 1), + RB(0x00, 0), RB(0x8c, 0), RB(0x8c, 1)), + D_MODULE(HCLK_SGPIO2, "hclk_sgpio2", DIV_P5_PG, RB(0x118, 3), + RB(0x118, 4), RB(0x118, 5), RB(0x00, 0), + RB(0x168, 1), RB(0x00, 0), RB(0x00, 0)), + D_MODULE(HCLK_SGPIO3, "hclk_sgpio3", DIV_P5_PG, RB(0x118, 6), + RB(0x118, 7), RB(0x118, 8), RB(0x00, 0), + RB(0x168, 2), RB(0x00, 0), RB(0x00, 0)), + D_MODULE(HCLK_SGPIO4, "hclk_sgpio4", DIV_P5_PG, RB(0x118, 9), + RB(0x118, 10), RB(0x118, 11), RB(0x00, 0), + RB(0x168, 3), RB(0x00, 0), RB(0x00, 0)), + D_MODULE(HCLK_TIMER0, "hclk_timer0", CLKOUT_D40, RB(0xe8, 3), + RB(0xe8, 4), RB(0xe8, 5), RB(0x00, 0), + RB(0x15c, 1), RB(0x00, 0), RB(0x00, 0)), + D_MODULE(HCLK_TIMER1, "hclk_timer1", CLKOUT_D40, RB(0xe8, 6), + RB(0xe8, 7), RB(0xe8, 8), RB(0x00, 0), + RB(0x15c, 2), RB(0x00, 0), RB(0x00, 0)), + D_MODULE(HCLK_USBF, "hclk_usbf", CLKOUT_D8, RB(0x1c, 3), + RB(0x00, 0), RB(0x00, 0), RB(0x1c, 4), + RB(0x00, 0), RB(0x20, 2), RB(0x20, 3)), + D_MODULE(HCLK_USBH, "hclk_usbh", CLKOUT_D8, RB(0x1c, 0), + RB(0x1c, 1), RB(0x00, 0), RB(0x1c, 2), + RB(0x00, 0), RB(0x20, 0), RB(0x20, 1)), + D_MODULE(HCLK_USBPM, "hclk_usbpm", CLKOUT_D8, RB(0x1c, 5), + RB(0x00, 0), RB(0x00, 0), RB(0x00, 0), + RB(0x00, 0), RB(0x00, 0), RB(0x00, 0)), + D_GATE(CLK_48_PG_F, "clk_48_pg_f", CLK_48, RB(0xf0, 12), + RB(0xf0, 13), RB(0x00, 0), RB(0xf0, 14), + RB(0x00, 0), RB(0x160, 4), RB(0x160, 5)), + D_GATE(CLK_48_PG4, "clk_48_pg4", CLK_48, RB(0xf0, 9), + RB(0xf0, 10), RB(0xf0, 11), RB(0x00, 0), + RB(0x160, 3), RB(0x00, 0), RB(0x00, 0)), + D_FFC(CLK_DDRPHY_PLLCLK_D4, "clk_ddrphy_pllclk_d4", CLK_DDRPHY_PLLCLK, 4), + D_FFC(CLK_ECAT100_D4, "clk_ecat100_d4", CLK_ECAT100, 4), + D_FFC(CLK_HSR100_D2, "clk_hsr100_d2", CLK_HSR100, 2), + D_FFC(CLK_REF_SYNC_D4, "clk_ref_sync_d4", CLK_REF_SYNC, 4), + D_FFC(CLK_REF_SYNC_D8, "clk_ref_sync_d8", CLK_REF_SYNC, 8), + D_FFC(CLK_SERCOS100_D2, "clk_sercos100_d2", CLK_SERCOS100, 2), + D_DIV(DIV_CA7, "div_ca7", CLK_REF_SYNC, 57, 1, 4, 1, 2, 4), + D_MODULE(HCLK_CAN0, "hclk_can0", CLK_48, RB(0xf0, 3), + RB(0xf0, 4), RB(0xf0, 5), RB(0x00, 0), + RB(0x160, 1), RB(0x00, 0), RB(0x00, 0)), + D_MODULE(HCLK_CAN1, "hclk_can1", CLK_48, RB(0xf0, 6), + RB(0xf0, 7), RB(0xf0, 8), RB(0x00, 0), + RB(0x160, 2), RB(0x00, 0), RB(0x00, 0)), + D_MODULE(HCLK_DELTASIGMA, "hclk_deltasigma", DIV_MOTOR, RB(0x3c, 15), + RB(0x3c, 16), RB(0x3c, 17), RB(0x00, 0), + RB(0x00, 0), RB(0x00, 0), RB(0x00, 0)), + D_MODULE(HCLK_PWMPTO, "hclk_pwmpto", DIV_MOTOR, RB(0x3c, 12), + RB(0x3c, 13), RB(0x3c, 14), RB(0x00, 0), + RB(0x00, 0), RB(0x00, 0), RB(0x00, 0)), + D_MODULE(HCLK_RSV, "hclk_rsv", CLK_48, RB(0xf0, 0), + RB(0xf0, 1), RB(0xf0, 2), RB(0x00, 0), + RB(0x160, 0), RB(0x00, 0), RB(0x00, 0)), + D_MODULE(HCLK_SGPIO0, "hclk_sgpio0", DIV_MOTOR, RB(0x3c, 0), + RB(0x3c, 1), RB(0x3c, 2), RB(0x00, 0), + RB(0x00, 0), RB(0x00, 0), RB(0x00, 0)), + D_MODULE(HCLK_SGPIO1, "hclk_sgpio1", DIV_MOTOR, RB(0x3c, 3), + RB(0x3c, 4), RB(0x3c, 5), RB(0x00, 0), + RB(0x00, 0), RB(0x00, 0), RB(0x00, 0)), + D_DIV(RTOS_MDC, "rtos_mdc", CLK_REF_SYNC, 100, 80, 640, 80, 160, 320, 640), + D_GATE(CLK_CM3, "clk_cm3", CLK_REF_SYNC_D4, RB(0x174, 0), + RB(0x174, 1), RB(0x00, 0), RB(0x174, 2), + RB(0x00, 0), RB(0x178, 0), RB(0x178, 1)), + D_GATE(CLK_DDRC, "clk_ddrc", CLK_DDRPHY_PLLCLK_D4, RB(0x64, 3), + RB(0x64, 4), RB(0x00, 0), RB(0x00, 0), + RB(0x00, 0), RB(0x00, 0), RB(0x00, 0)), + D_GATE(CLK_ECAT25, "clk_ecat25", CLK_ECAT100_D4, RB(0x80, 3), + RB(0x80, 4), RB(0x00, 0), RB(0x00, 0), + RB(0x00, 0), RB(0x00, 0), RB(0x00, 0)), + D_GATE(CLK_HSR50, "clk_hsr50", CLK_HSR100_D2, RB(0x90, 4), + RB(0x90, 5), RB(0x00, 0), RB(0x00, 0), + RB(0x00, 0), RB(0x00, 0), RB(0x00, 0)), + D_GATE(CLK_HW_RTOS, "clk_hw_rtos", CLK_REF_SYNC_D4, RB(0x18c, 0), + RB(0x18c, 1), RB(0x00, 0), RB(0x00, 0), + RB(0x00, 0), RB(0x00, 0), RB(0x00, 0)), + D_GATE(CLK_SERCOS50, "clk_sercos50", CLK_SERCOS100_D2, RB(0x84, 4), + RB(0x84, 3), RB(0x00, 0), RB(0x00, 0), + RB(0x00, 0), RB(0x00, 0), RB(0x00, 0)), + D_MODULE(HCLK_ADC, "hclk_adc", CLK_REF_SYNC_D8, RB(0x34, 15), + RB(0x34, 16), RB(0x34, 17), RB(0x00, 0), + RB(0x00, 0), RB(0x00, 0), RB(0x00, 0)), + D_MODULE(HCLK_CM3, "hclk_cm3", CLK_REF_SYNC_D4, RB(0x184, 0), + RB(0x184, 1), RB(0x184, 2), RB(0x00, 0), + RB(0x00, 0), RB(0x00, 0), RB(0x00, 0)), + D_MODULE(HCLK_CRYPTO_EIP150, "hclk_crypto_eip150", CLK_REF_SYNC_D4, RB(0x24, 3), + RB(0x24, 4), RB(0x24, 5), RB(0x00, 0), + RB(0x28, 2), RB(0x00, 0), RB(0x00, 0)), + D_MODULE(HCLK_CRYPTO_EIP93, "hclk_crypto_eip93", CLK_REF_SYNC_D4, RB(0x24, 0), + RB(0x24, 1), RB(0x00, 0), RB(0x24, 2), + RB(0x00, 0), RB(0x28, 0), RB(0x28, 1)), + D_MODULE(HCLK_DDRC, "hclk_ddrc", CLK_REF_SYNC_D4, RB(0x64, 0), + RB(0x64, 2), RB(0x00, 0), RB(0x64, 1), + RB(0x00, 0), RB(0x74, 0), RB(0x74, 1)), + D_MODULE(HCLK_DMA0, "hclk_dma0", CLK_REF_SYNC_D4, RB(0x4c, 0), + RB(0x4c, 1), RB(0x4c, 2), RB(0x4c, 3), + RB(0x58, 0), RB(0x58, 1), RB(0x58, 2)), + D_MODULE(HCLK_DMA1, "hclk_dma1", CLK_REF_SYNC_D4, RB(0x4c, 4), + RB(0x4c, 5), RB(0x4c, 6), RB(0x4c, 7), + RB(0x58, 3), RB(0x58, 4), RB(0x58, 5)), + D_MODULE(HCLK_GMAC0, "hclk_gmac0", CLK_REF_SYNC_D4, RB(0x6c, 0), + RB(0x6c, 1), RB(0x6c, 2), RB(0x6c, 3), + RB(0x78, 0), RB(0x78, 1), RB(0x78, 2)), + D_MODULE(HCLK_GMAC1, "hclk_gmac1", CLK_REF_SYNC_D4, RB(0x70, 0), + RB(0x70, 1), RB(0x70, 2), RB(0x70, 3), + RB(0x7c, 0), RB(0x7c, 1), RB(0x7c, 2)), + D_MODULE(HCLK_GPIO0, "hclk_gpio0", CLK_REF_SYNC_D4, RB(0x40, 18), + RB(0x40, 19), RB(0x40, 20), RB(0x00, 0), + RB(0x00, 0), RB(0x00, 0), RB(0x00, 0)), + D_MODULE(HCLK_GPIO1, "hclk_gpio1", CLK_REF_SYNC_D4, RB(0x40, 21), + RB(0x40, 22), RB(0x40, 23), RB(0x00, 0), + RB(0x00, 0), RB(0x00, 0), RB(0x00, 0)), + D_MODULE(HCLK_GPIO2, "hclk_gpio2", CLK_REF_SYNC_D4, RB(0x44, 9), + RB(0x44, 10), RB(0x44, 11), RB(0x00, 0), + RB(0x00, 0), RB(0x00, 0), RB(0x00, 0)), + D_MODULE(HCLK_HSR, "hclk_hsr", CLK_HSR100_D2, RB(0x90, 0), + RB(0x90, 2), RB(0x00, 0), RB(0x90, 1), + RB(0x00, 0), RB(0x98, 0), RB(0x98, 1)), + D_MODULE(HCLK_I2C0, "hclk_i2c0", CLK_REF_SYNC_D8, RB(0x34, 9), + RB(0x34, 10), RB(0x34, 11), RB(0x00, 0), + RB(0x00, 0), RB(0x00, 0), RB(0x00, 0)), + D_MODULE(HCLK_I2C1, "hclk_i2c1", CLK_REF_SYNC_D8, RB(0x34, 12), + RB(0x34, 13), RB(0x34, 14), RB(0x00, 0), + RB(0x00, 0), RB(0x00, 0), RB(0x00, 0)), + D_MODULE(HCLK_LCD, "hclk_lcd", CLK_REF_SYNC_D4, RB(0xf4, 0), + RB(0xf4, 1), RB(0xf4, 2), RB(0x00, 0), + RB(0x164, 0), RB(0x00, 0), RB(0x00, 0)), + D_MODULE(HCLK_MSEBI_M, "hclk_msebi_m", CLK_REF_SYNC_D4, RB(0x2c, 4), + RB(0x2c, 5), RB(0x2c, 6), RB(0x00, 0), + RB(0x30, 3), RB(0x00, 0), RB(0x00, 0)), + D_MODULE(HCLK_MSEBI_S, "hclk_msebi_s", CLK_REF_SYNC_D4, RB(0x2c, 0), + RB(0x2c, 1), RB(0x2c, 2), RB(0x2c, 3), + RB(0x30, 0), RB(0x30, 1), RB(0x30, 2)), + D_MODULE(HCLK_NAND, "hclk_nand", CLK_REF_SYNC_D4, RB(0x50, 0), + RB(0x50, 1), RB(0x50, 2), RB(0x50, 3), + RB(0x5c, 0), RB(0x5c, 1), RB(0x5c, 2)), + D_MODULE(HCLK_PG_I, "hclk_pg_i", CLK_REF_SYNC_D4, RB(0xf4, 12), + RB(0xf4, 13), RB(0x00, 0), RB(0xf4, 14), + RB(0x00, 0), RB(0x164, 4), RB(0x164, 5)), + D_MODULE(HCLK_PG19, "hclk_pg19", CLK_REF_SYNC_D4, RB(0x44, 12), + RB(0x44, 13), RB(0x44, 14), RB(0x00, 0), + RB(0x00, 0), RB(0x00, 0), RB(0x00, 0)), + D_MODULE(HCLK_PG20, "hclk_pg20", CLK_REF_SYNC_D4, RB(0x44, 15), + RB(0x44, 16), RB(0x44, 17), RB(0x00, 0), + RB(0x00, 0), RB(0x00, 0), RB(0x00, 0)), + D_MODULE(HCLK_PG3, "hclk_pg3", CLK_REF_SYNC_D4, RB(0xf4, 6), + RB(0xf4, 7), RB(0xf4, 8), RB(0x00, 0), + RB(0x164, 2), RB(0x00, 0), RB(0x00, 0)), + D_MODULE(HCLK_PG4, "hclk_pg4", CLK_REF_SYNC_D4, RB(0xf4, 9), + RB(0xf4, 10), RB(0xf4, 11), RB(0x00, 0), + RB(0x164, 3), RB(0x00, 0), RB(0x00, 0)), + D_MODULE(HCLK_QSPI0, "hclk_qspi0", CLK_REF_SYNC_D4, RB(0x54, 0), + RB(0x54, 1), RB(0x54, 2), RB(0x54, 3), + RB(0x60, 0), RB(0x60, 1), RB(0x60, 2)), + D_MODULE(HCLK_QSPI1, "hclk_qspi1", CLK_REF_SYNC_D4, RB(0x90, 0), + RB(0x90, 1), RB(0x90, 2), RB(0x90, 3), + RB(0x98, 0), RB(0x98, 1), RB(0x98, 2)), + D_MODULE(HCLK_ROM, "hclk_rom", CLK_REF_SYNC_D4, RB(0x154, 0), + RB(0x154, 1), RB(0x154, 2), RB(0x00, 0), + RB(0x170, 0), RB(0x00, 0), RB(0x00, 0)), + D_MODULE(HCLK_RTC, "hclk_rtc", CLK_REF_SYNC_D8, RB(0x140, 0), + RB(0x140, 3), RB(0x00, 0), RB(0x140, 2), + RB(0x00, 0), RB(0x00, 0), RB(0x00, 0)), + D_MODULE(HCLK_SDIO0, "hclk_sdio0", CLK_REF_SYNC_D4, RB(0x0c, 0), + RB(0x0c, 1), RB(0x0c, 2), RB(0x0c, 3), + RB(0x10, 0), RB(0x10, 1), RB(0x10, 2)), + D_MODULE(HCLK_SDIO1, "hclk_sdio1", CLK_REF_SYNC_D4, RB(0xc8, 0), + RB(0xc8, 1), RB(0xc8, 2), RB(0xc8, 3), + RB(0xcc, 0), RB(0xcc, 1), RB(0xcc, 2)), + D_MODULE(HCLK_SEMAP, "hclk_semap", CLK_REF_SYNC_D4, RB(0xf4, 3), + RB(0xf4, 4), RB(0xf4, 5), RB(0x00, 0), + RB(0x164, 1), RB(0x00, 0), RB(0x00, 0)), + D_MODULE(HCLK_SPI0, "hclk_spi0", CLK_REF_SYNC_D4, RB(0x40, 0), + RB(0x40, 1), RB(0x40, 2), RB(0x00, 0), + RB(0x00, 0), RB(0x00, 0), RB(0x00, 0)), + D_MODULE(HCLK_SPI1, "hclk_spi1", CLK_REF_SYNC_D4, RB(0x40, 3), + RB(0x40, 4), RB(0x40, 5), RB(0x00, 0), + RB(0x00, 0), RB(0x00, 0), RB(0x00, 0)), + D_MODULE(HCLK_SPI2, "hclk_spi2", CLK_REF_SYNC_D4, RB(0x40, 6), + RB(0x40, 7), RB(0x40, 8), RB(0x00, 0), + RB(0x00, 0), RB(0x00, 0), RB(0x00, 0)), + D_MODULE(HCLK_SPI3, "hclk_spi3", CLK_REF_SYNC_D4, RB(0x40, 9), + RB(0x40, 10), RB(0x40, 11), RB(0x00, 0), + RB(0x00, 0), RB(0x00, 0), RB(0x00, 0)), + D_MODULE(HCLK_SPI4, "hclk_spi4", CLK_REF_SYNC_D4, RB(0x40, 12), + RB(0x40, 13), RB(0x40, 14), RB(0x00, 0), + RB(0x00, 0), RB(0x00, 0), RB(0x00, 0)), + D_MODULE(HCLK_SPI5, "hclk_spi5", CLK_REF_SYNC_D4, RB(0x40, 15), + RB(0x40, 16), RB(0x40, 17), RB(0x00, 0), + RB(0x00, 0), RB(0x00, 0), RB(0x00, 0)), + D_MODULE(HCLK_SWITCH, "hclk_switch", CLK_REF_SYNC_D4, RB(0x130, 0), + RB(0x00, 0), RB(0x130, 1), RB(0x00, 0), + RB(0x00, 0), RB(0x00, 0), RB(0x00, 0)), + D_MODULE(HCLK_SWITCH_RG, "hclk_switch_rg", CLK_REF_SYNC_D4, RB(0x188, 0), + RB(0x188, 1), RB(0x188, 2), RB(0x00, 0), + RB(0x00, 0), RB(0x00, 0), RB(0x00, 0)), + D_MODULE(HCLK_UART0, "hclk_uart0", CLK_REF_SYNC_D8, RB(0x34, 0), + RB(0x34, 1), RB(0x34, 2), RB(0x00, 0), + RB(0x00, 0), RB(0x00, 0), RB(0x00, 0)), + D_MODULE(HCLK_UART1, "hclk_uart1", CLK_REF_SYNC_D8, RB(0x34, 3), + RB(0x34, 4), RB(0x34, 5), RB(0x00, 0), + RB(0x00, 0), RB(0x00, 0), RB(0x00, 0)), + D_MODULE(HCLK_UART2, "hclk_uart2", CLK_REF_SYNC_D8, RB(0x34, 6), + RB(0x34, 7), RB(0x34, 8), RB(0x00, 0), + RB(0x00, 0), RB(0x00, 0), RB(0x00, 0)), + D_MODULE(HCLK_UART3, "hclk_uart3", CLK_REF_SYNC_D4, RB(0x40, 24), + RB(0x40, 25), RB(0x40, 26), RB(0x00, 0), + RB(0x00, 0), RB(0x00, 0), RB(0x00, 0)), + D_MODULE(HCLK_UART4, "hclk_uart4", CLK_REF_SYNC_D4, RB(0x40, 27), + RB(0x40, 28), RB(0x40, 29), RB(0x00, 0), + RB(0x00, 0), RB(0x00, 0), RB(0x00, 0)), + D_MODULE(HCLK_UART5, "hclk_uart5", CLK_REF_SYNC_D4, RB(0x44, 0), + RB(0x44, 1), RB(0x44, 2), RB(0x00, 0), + RB(0x00, 0), RB(0x00, 0), RB(0x00, 0)), + D_MODULE(HCLK_UART6, "hclk_uart6", CLK_REF_SYNC_D4, RB(0x44, 3), + RB(0x44, 4), RB(0x44, 5), RB(0x00, 0), + RB(0x00, 0), RB(0x00, 0), RB(0x00, 0)), + D_MODULE(HCLK_UART7, "hclk_uart7", CLK_REF_SYNC_D4, RB(0x44, 6), + RB(0x44, 7), RB(0x44, 8), RB(0x00, 0), + RB(0x00, 0), RB(0x00, 0), RB(0x00, 0)), + /* + * These are not hardware clocks, but are needed to handle the special + * case where we have a 'selector bit' that doesn't just change the + * parent for a clock, but also the gate it's supposed to use. + */ + { + .index = R9A06G032_UART_GROUP_012, + .name = "uart_group_012", + .type = K_BITSEL, + .source = 1 + R9A06G032_DIV_UART, + /* R9A06G032_SYSCTRL_REG_PWRCTRL_PG0_0 */ + .dual.sel = RB(0x34, 30), + .dual.group = 0, + }, + { + .index = R9A06G032_UART_GROUP_34567, + .name = "uart_group_34567", + .type = K_BITSEL, + .source = 1 + R9A06G032_DIV_P2_PG, + /* R9A06G032_SYSCTRL_REG_PWRCTRL_PG1_PR2 */ + .dual.sel = RB(0xec, 24), + .dual.group = 1, + }, + D_UGATE(CLK_UART0, "clk_uart0", UART_GROUP_012, 0, + RB(0x34, 18), RB(0x34, 19), RB(0x34, 20), RB(0x34, 21)), + D_UGATE(CLK_UART1, "clk_uart1", UART_GROUP_012, 0, + RB(0x34, 22), RB(0x34, 23), RB(0x34, 24), RB(0x34, 25)), + D_UGATE(CLK_UART2, "clk_uart2", UART_GROUP_012, 0, + RB(0x34, 26), RB(0x34, 27), RB(0x34, 28), RB(0x34, 29)), + D_UGATE(CLK_UART3, "clk_uart3", UART_GROUP_34567, 1, + RB(0xec, 0), RB(0xec, 1), RB(0xec, 2), RB(0xec, 3)), + D_UGATE(CLK_UART4, "clk_uart4", UART_GROUP_34567, 1, + RB(0xec, 4), RB(0xec, 5), RB(0xec, 6), RB(0xec, 7)), + D_UGATE(CLK_UART5, "clk_uart5", UART_GROUP_34567, 1, + RB(0xec, 8), RB(0xec, 9), RB(0xec, 10), RB(0xec, 11)), + D_UGATE(CLK_UART6, "clk_uart6", UART_GROUP_34567, 1, + RB(0xec, 12), RB(0xec, 13), RB(0xec, 14), RB(0xec, 15)), + D_UGATE(CLK_UART7, "clk_uart7", UART_GROUP_34567, 1, + RB(0xec, 16), RB(0xec, 17), RB(0xec, 18), RB(0xec, 19)), +}; + +struct r9a06g032_priv { + struct clk_onecell_data data; + spinlock_t lock; /* protects concurrent access to gates */ + void __iomem *reg; +}; + +static struct r9a06g032_priv *sysctrl_priv; + +/* Exported helper to access the DMAMUX register */ +int r9a06g032_sysctrl_set_dmamux(u32 mask, u32 val) +{ + unsigned long flags; + u32 dmamux; + + if (!sysctrl_priv) + return -EPROBE_DEFER; + + spin_lock_irqsave(&sysctrl_priv->lock, flags); + + dmamux = readl(sysctrl_priv->reg + R9A06G032_SYSCTRL_DMAMUX); + dmamux &= ~mask; + dmamux |= val & mask; + writel(dmamux, sysctrl_priv->reg + R9A06G032_SYSCTRL_DMAMUX); + + spin_unlock_irqrestore(&sysctrl_priv->lock, flags); + + return 0; +} +EXPORT_SYMBOL_GPL(r9a06g032_sysctrl_set_dmamux); + +static void clk_rdesc_set(struct r9a06g032_priv *clocks, + struct regbit rb, unsigned int on) +{ + u32 __iomem *reg = clocks->reg + (rb.reg * 4); + u32 val; + + if (!rb.reg && !rb.bit) + return; + + val = readl(reg); + val = (val & ~BIT(rb.bit)) | ((!!on) << rb.bit); + writel(val, reg); +} + +static int clk_rdesc_get(struct r9a06g032_priv *clocks, struct regbit rb) +{ + u32 __iomem *reg = clocks->reg + (rb.reg * 4); + u32 val = readl(reg); + + return !!(val & BIT(rb.bit)); +} + +/* + * This implements the R9A06G032 clock gate 'driver'. We cannot use the system's + * clock gate framework as the gates on the R9A06G032 have a special enabling + * sequence, therefore we use this little proxy. + */ +struct r9a06g032_clk_gate { + struct clk_hw hw; + struct r9a06g032_priv *clocks; + u16 index; + + struct r9a06g032_gate gate; +}; + +#define to_r9a06g032_gate(_hw) container_of(_hw, struct r9a06g032_clk_gate, hw) + +static int create_add_module_clock(struct of_phandle_args *clkspec, + struct device *dev) +{ + struct clk *clk; + int error; + + clk = of_clk_get_from_provider(clkspec); + if (IS_ERR(clk)) + return PTR_ERR(clk); + + error = pm_clk_create(dev); + if (error) { + clk_put(clk); + return error; + } + + error = pm_clk_add_clk(dev, clk); + if (error) { + pm_clk_destroy(dev); + clk_put(clk); + } + + return error; +} + +static int r9a06g032_attach_dev(struct generic_pm_domain *pd, + struct device *dev) +{ + struct device_node *np = dev->of_node; + struct of_phandle_args clkspec; + int i = 0; + int error; + int index; + + while (!of_parse_phandle_with_args(np, "clocks", "#clock-cells", i++, + &clkspec)) { + if (clkspec.np != pd->dev.of_node) + continue; + + index = clkspec.args[0]; + if (index < R9A06G032_CLOCK_COUNT && + r9a06g032_clocks[index].managed) { + error = create_add_module_clock(&clkspec, dev); + of_node_put(clkspec.np); + if (error) + return error; + } + } + + return 0; +} + +static void r9a06g032_detach_dev(struct generic_pm_domain *unused, struct device *dev) +{ + if (!pm_clk_no_clocks(dev)) + pm_clk_destroy(dev); +} + +static int r9a06g032_add_clk_domain(struct device *dev) +{ + struct device_node *np = dev->of_node; + struct generic_pm_domain *pd; + + pd = devm_kzalloc(dev, sizeof(*pd), GFP_KERNEL); + if (!pd) + return -ENOMEM; + + pd->name = np->name; + pd->flags = GENPD_FLAG_PM_CLK | GENPD_FLAG_ALWAYS_ON | + GENPD_FLAG_ACTIVE_WAKEUP; + pd->attach_dev = r9a06g032_attach_dev; + pd->detach_dev = r9a06g032_detach_dev; + pm_genpd_init(pd, &pm_domain_always_on_gov, false); + + of_genpd_add_provider_simple(np, pd); + return 0; +} + +static void +r9a06g032_clk_gate_set(struct r9a06g032_priv *clocks, + struct r9a06g032_gate *g, int on) +{ + unsigned long flags; + + WARN_ON(!g->gate.reg && !g->gate.bit); + + spin_lock_irqsave(&clocks->lock, flags); + clk_rdesc_set(clocks, g->gate, on); + /* De-assert reset */ + clk_rdesc_set(clocks, g->reset, 1); + spin_unlock_irqrestore(&clocks->lock, flags); + + /* Hardware manual recommends 5us delay after enabling clock & reset */ + udelay(5); + + /* If the peripheral is memory mapped (i.e. an AXI slave), there is an + * associated SLVRDY bit in the System Controller that needs to be set + * so that the FlexWAY bus fabric passes on the read/write requests. + */ + spin_lock_irqsave(&clocks->lock, flags); + clk_rdesc_set(clocks, g->ready, on); + /* Clear 'Master Idle Request' bit */ + clk_rdesc_set(clocks, g->midle, !on); + spin_unlock_irqrestore(&clocks->lock, flags); + + /* Note: We don't wait for FlexWAY Socket Connection signal */ +} + +static int r9a06g032_clk_gate_enable(struct clk_hw *hw) +{ + struct r9a06g032_clk_gate *g = to_r9a06g032_gate(hw); + + r9a06g032_clk_gate_set(g->clocks, &g->gate, 1); + return 0; +} + +static void r9a06g032_clk_gate_disable(struct clk_hw *hw) +{ + struct r9a06g032_clk_gate *g = to_r9a06g032_gate(hw); + + r9a06g032_clk_gate_set(g->clocks, &g->gate, 0); +} + +static int r9a06g032_clk_gate_is_enabled(struct clk_hw *hw) +{ + struct r9a06g032_clk_gate *g = to_r9a06g032_gate(hw); + + /* if clock is in reset, the gate might be on, and still not 'be' on */ + if (g->gate.reset.reg && !clk_rdesc_get(g->clocks, g->gate.reset)) + return 0; + + return clk_rdesc_get(g->clocks, g->gate.gate); +} + +static const struct clk_ops r9a06g032_clk_gate_ops = { + .enable = r9a06g032_clk_gate_enable, + .disable = r9a06g032_clk_gate_disable, + .is_enabled = r9a06g032_clk_gate_is_enabled, +}; + +static struct clk * +r9a06g032_register_gate(struct r9a06g032_priv *clocks, + const char *parent_name, + const struct r9a06g032_clkdesc *desc) +{ + struct clk *clk; + struct r9a06g032_clk_gate *g; + struct clk_init_data init = {}; + + g = kzalloc(sizeof(*g), GFP_KERNEL); + if (!g) + return NULL; + + init.name = desc->name; + init.ops = &r9a06g032_clk_gate_ops; + init.flags = CLK_SET_RATE_PARENT; + init.parent_names = parent_name ? &parent_name : NULL; + init.num_parents = parent_name ? 1 : 0; + + g->clocks = clocks; + g->index = desc->index; + g->gate = desc->gate; + g->hw.init = &init; + + /* + * important here, some clocks are already in use by the CM3, we + * have to assume they are not Linux's to play with and try to disable + * at the end of the boot! + */ + if (r9a06g032_clk_gate_is_enabled(&g->hw)) { + init.flags |= CLK_IS_CRITICAL; + pr_debug("%s was enabled, making read-only\n", desc->name); + } + + clk = clk_register(NULL, &g->hw); + if (IS_ERR(clk)) { + kfree(g); + return NULL; + } + return clk; +} + +struct r9a06g032_clk_div { + struct clk_hw hw; + struct r9a06g032_priv *clocks; + u16 index; + u16 reg; + u16 min, max; + u8 table_size; + u16 table[8]; /* we know there are no more than 8 */ +}; + +#define to_r9a06g032_div(_hw) \ + container_of(_hw, struct r9a06g032_clk_div, hw) + +static unsigned long +r9a06g032_div_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + struct r9a06g032_clk_div *clk = to_r9a06g032_div(hw); + u32 __iomem *reg = clk->clocks->reg + (4 * clk->reg); + u32 div = readl(reg); + + if (div < clk->min) + div = clk->min; + else if (div > clk->max) + div = clk->max; + return DIV_ROUND_UP(parent_rate, div); +} + +/* + * Attempts to find a value that is in range of min,max, + * and if a table of set dividers was specified for this + * register, try to find the fixed divider that is the closest + * to the target frequency + */ +static long +r9a06g032_div_clamp_div(struct r9a06g032_clk_div *clk, + unsigned long rate, unsigned long prate) +{ + /* + 1 to cope with rates that have the remainder dropped */ + u32 div = DIV_ROUND_UP(prate, rate + 1); + int i; + + if (div <= clk->min) + return clk->min; + if (div >= clk->max) + return clk->max; + + for (i = 0; clk->table_size && i < clk->table_size - 1; i++) { + if (div >= clk->table[i] && div <= clk->table[i + 1]) { + unsigned long m = rate - + DIV_ROUND_UP(prate, clk->table[i]); + unsigned long p = + DIV_ROUND_UP(prate, clk->table[i + 1]) - + rate; + /* + * select the divider that generates + * the value closest to the ideal frequency + */ + div = p >= m ? clk->table[i] : clk->table[i + 1]; + return div; + } + } + return div; +} + +static int +r9a06g032_div_determine_rate(struct clk_hw *hw, struct clk_rate_request *req) +{ + struct r9a06g032_clk_div *clk = to_r9a06g032_div(hw); + u32 div = DIV_ROUND_UP(req->best_parent_rate, req->rate); + + pr_devel("%s %pC %ld (prate %ld) (wanted div %u)\n", __func__, + hw->clk, req->rate, req->best_parent_rate, div); + pr_devel(" min %d (%ld) max %d (%ld)\n", + clk->min, DIV_ROUND_UP(req->best_parent_rate, clk->min), + clk->max, DIV_ROUND_UP(req->best_parent_rate, clk->max)); + + div = r9a06g032_div_clamp_div(clk, req->rate, req->best_parent_rate); + /* + * this is a hack. Currently the serial driver asks for a clock rate + * that is 16 times the baud rate -- and that is wildly outside the + * range of the UART divider, somehow there is no provision for that + * case of 'let the divider as is if outside range'. + * The serial driver *shouldn't* play with these clocks anyway, there's + * several uarts attached to this divider, and changing this impacts + * everyone. + */ + if (clk->index == R9A06G032_DIV_UART || + clk->index == R9A06G032_DIV_P2_PG) { + pr_devel("%s div uart hack!\n", __func__); + req->rate = clk_get_rate(hw->clk); + return 0; + } + req->rate = DIV_ROUND_UP(req->best_parent_rate, div); + pr_devel("%s %pC %ld / %u = %ld\n", __func__, hw->clk, + req->best_parent_rate, div, req->rate); + return 0; +} + +static int +r9a06g032_div_set_rate(struct clk_hw *hw, + unsigned long rate, unsigned long parent_rate) +{ + struct r9a06g032_clk_div *clk = to_r9a06g032_div(hw); + /* + 1 to cope with rates that have the remainder dropped */ + u32 div = DIV_ROUND_UP(parent_rate, rate + 1); + u32 __iomem *reg = clk->clocks->reg + (4 * clk->reg); + + pr_devel("%s %pC rate %ld parent %ld div %d\n", __func__, hw->clk, + rate, parent_rate, div); + + /* + * Need to write the bit 31 with the divider value to + * latch it. Technically we should wait until it has been + * cleared too. + * TODO: Find whether this callback is sleepable, in case + * the hardware /does/ require some sort of spinloop here. + */ + writel(div | BIT(31), reg); + + return 0; +} + +static const struct clk_ops r9a06g032_clk_div_ops = { + .recalc_rate = r9a06g032_div_recalc_rate, + .determine_rate = r9a06g032_div_determine_rate, + .set_rate = r9a06g032_div_set_rate, +}; + +static struct clk * +r9a06g032_register_div(struct r9a06g032_priv *clocks, + const char *parent_name, + const struct r9a06g032_clkdesc *desc) +{ + struct r9a06g032_clk_div *div; + struct clk *clk; + struct clk_init_data init = {}; + unsigned int i; + + div = kzalloc(sizeof(*div), GFP_KERNEL); + if (!div) + return NULL; + + init.name = desc->name; + init.ops = &r9a06g032_clk_div_ops; + init.flags = CLK_SET_RATE_PARENT; + init.parent_names = parent_name ? &parent_name : NULL; + init.num_parents = parent_name ? 1 : 0; + + div->clocks = clocks; + div->index = desc->index; + div->reg = desc->reg; + div->hw.init = &init; + div->min = desc->div_min; + div->max = desc->div_max; + /* populate (optional) divider table fixed values */ + for (i = 0; i < ARRAY_SIZE(div->table) && + i < ARRAY_SIZE(desc->div_table) && desc->div_table[i]; i++) { + div->table[div->table_size++] = desc->div_table[i]; + } + + clk = clk_register(NULL, &div->hw); + if (IS_ERR(clk)) { + kfree(div); + return NULL; + } + return clk; +} + +/* + * This clock provider handles the case of the R9A06G032 where you have + * peripherals that have two potential clock source and two gates, one for + * each of the clock source - the used clock source (for all sub clocks) + * is selected by a single bit. + * That single bit affects all sub-clocks, and therefore needs to change the + * active gate (and turn the others off) and force a recalculation of the rates. + * + * This implements two clock providers, one 'bitselect' that + * handles the switch between both parents, and another 'dualgate' + * that knows which gate to poke at, depending on the parent's bit position. + */ +struct r9a06g032_clk_bitsel { + struct clk_hw hw; + struct r9a06g032_priv *clocks; + u16 index; + struct regbit selector; /* selector register + bit */ +}; + +#define to_clk_bitselect(_hw) \ + container_of(_hw, struct r9a06g032_clk_bitsel, hw) + +static u8 r9a06g032_clk_mux_get_parent(struct clk_hw *hw) +{ + struct r9a06g032_clk_bitsel *set = to_clk_bitselect(hw); + + return clk_rdesc_get(set->clocks, set->selector); +} + +static int r9a06g032_clk_mux_set_parent(struct clk_hw *hw, u8 index) +{ + struct r9a06g032_clk_bitsel *set = to_clk_bitselect(hw); + + /* a single bit in the register selects one of two parent clocks */ + clk_rdesc_set(set->clocks, set->selector, !!index); + + return 0; +} + +static const struct clk_ops clk_bitselect_ops = { + .determine_rate = clk_hw_determine_rate_no_reparent, + .get_parent = r9a06g032_clk_mux_get_parent, + .set_parent = r9a06g032_clk_mux_set_parent, +}; + +static struct clk * +r9a06g032_register_bitsel(struct r9a06g032_priv *clocks, + const char *parent_name, + const struct r9a06g032_clkdesc *desc) +{ + struct clk *clk; + struct r9a06g032_clk_bitsel *g; + struct clk_init_data init = {}; + const char *names[2]; + + /* allocate the gate */ + g = kzalloc(sizeof(*g), GFP_KERNEL); + if (!g) + return NULL; + + names[0] = parent_name; + names[1] = "clk_pll_usb"; + + init.name = desc->name; + init.ops = &clk_bitselect_ops; + init.flags = CLK_SET_RATE_PARENT; + init.parent_names = names; + init.num_parents = 2; + + g->clocks = clocks; + g->index = desc->index; + g->selector = desc->dual.sel; + g->hw.init = &init; + + clk = clk_register(NULL, &g->hw); + if (IS_ERR(clk)) { + kfree(g); + return NULL; + } + return clk; +} + +struct r9a06g032_clk_dualgate { + struct clk_hw hw; + struct r9a06g032_priv *clocks; + u16 index; + struct regbit selector; /* selector register + bit */ + struct r9a06g032_gate gate[2]; +}; + +#define to_clk_dualgate(_hw) \ + container_of(_hw, struct r9a06g032_clk_dualgate, hw) + +static int +r9a06g032_clk_dualgate_setenable(struct r9a06g032_clk_dualgate *g, int enable) +{ + u8 sel_bit = clk_rdesc_get(g->clocks, g->selector); + + /* we always turn off the 'other' gate, regardless */ + r9a06g032_clk_gate_set(g->clocks, &g->gate[!sel_bit], 0); + r9a06g032_clk_gate_set(g->clocks, &g->gate[sel_bit], enable); + + return 0; +} + +static int r9a06g032_clk_dualgate_enable(struct clk_hw *hw) +{ + struct r9a06g032_clk_dualgate *gate = to_clk_dualgate(hw); + + r9a06g032_clk_dualgate_setenable(gate, 1); + + return 0; +} + +static void r9a06g032_clk_dualgate_disable(struct clk_hw *hw) +{ + struct r9a06g032_clk_dualgate *gate = to_clk_dualgate(hw); + + r9a06g032_clk_dualgate_setenable(gate, 0); +} + +static int r9a06g032_clk_dualgate_is_enabled(struct clk_hw *hw) +{ + struct r9a06g032_clk_dualgate *g = to_clk_dualgate(hw); + u8 sel_bit = clk_rdesc_get(g->clocks, g->selector); + + return clk_rdesc_get(g->clocks, g->gate[sel_bit].gate); +} + +static const struct clk_ops r9a06g032_clk_dualgate_ops = { + .enable = r9a06g032_clk_dualgate_enable, + .disable = r9a06g032_clk_dualgate_disable, + .is_enabled = r9a06g032_clk_dualgate_is_enabled, +}; + +static struct clk * +r9a06g032_register_dualgate(struct r9a06g032_priv *clocks, + const char *parent_name, + const struct r9a06g032_clkdesc *desc, + struct regbit sel) +{ + struct r9a06g032_clk_dualgate *g; + struct clk *clk; + struct clk_init_data init = {}; + + /* allocate the gate */ + g = kzalloc(sizeof(*g), GFP_KERNEL); + if (!g) + return NULL; + g->clocks = clocks; + g->index = desc->index; + g->selector = sel; + g->gate[0].gate = desc->dual.g1; + g->gate[0].reset = desc->dual.r1; + g->gate[1].gate = desc->dual.g2; + g->gate[1].reset = desc->dual.r2; + + init.name = desc->name; + init.ops = &r9a06g032_clk_dualgate_ops; + init.flags = CLK_SET_RATE_PARENT; + init.parent_names = &parent_name; + init.num_parents = 1; + g->hw.init = &init; + /* + * important here, some clocks are already in use by the CM3, we + * have to assume they are not Linux's to play with and try to disable + * at the end of the boot! + */ + if (r9a06g032_clk_dualgate_is_enabled(&g->hw)) { + init.flags |= CLK_IS_CRITICAL; + pr_debug("%s was enabled, making read-only\n", desc->name); + } + + clk = clk_register(NULL, &g->hw); + if (IS_ERR(clk)) { + kfree(g); + return NULL; + } + return clk; +} + +static void r9a06g032_clocks_del_clk_provider(void *data) +{ + of_clk_del_provider(data); +} + +static void __init r9a06g032_init_h2mode(struct r9a06g032_priv *clocks) +{ + struct device_node *usbf_np = NULL; + u32 usb; + + while ((usbf_np = of_find_compatible_node(usbf_np, NULL, + "renesas,rzn1-usbf"))) { + if (of_device_is_available(usbf_np)) + break; + } + + usb = readl(clocks->reg + R9A06G032_SYSCTRL_USB); + if (usbf_np) { + /* 1 host and 1 device mode */ + usb &= ~R9A06G032_SYSCTRL_USB_H2MODE; + of_node_put(usbf_np); + } else { + /* 2 hosts mode */ + usb |= R9A06G032_SYSCTRL_USB_H2MODE; + } + writel(usb, clocks->reg + R9A06G032_SYSCTRL_USB); +} + +static int __init r9a06g032_clocks_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct device_node *np = dev->of_node; + struct r9a06g032_priv *clocks; + struct clk **clks; + struct clk *mclk; + unsigned int i; + struct regbit uart_group_sel[2]; + int error; + + clocks = devm_kzalloc(dev, sizeof(*clocks), GFP_KERNEL); + clks = devm_kcalloc(dev, R9A06G032_CLOCK_COUNT, sizeof(struct clk *), + GFP_KERNEL); + if (!clocks || !clks) + return -ENOMEM; + + spin_lock_init(&clocks->lock); + + clocks->data.clks = clks; + clocks->data.clk_num = R9A06G032_CLOCK_COUNT; + + mclk = devm_clk_get(dev, "mclk"); + if (IS_ERR(mclk)) + return PTR_ERR(mclk); + + clocks->reg = of_iomap(np, 0); + if (WARN_ON(!clocks->reg)) + return -ENOMEM; + + r9a06g032_init_h2mode(clocks); + + for (i = 0; i < ARRAY_SIZE(r9a06g032_clocks); ++i) { + const struct r9a06g032_clkdesc *d = &r9a06g032_clocks[i]; + const char *parent_name = d->source ? + __clk_get_name(clocks->data.clks[d->source - 1]) : + __clk_get_name(mclk); + struct clk *clk = NULL; + + switch (d->type) { + case K_FFC: + clk = clk_register_fixed_factor(NULL, d->name, + parent_name, 0, + d->mul, d->div); + break; + case K_GATE: + clk = r9a06g032_register_gate(clocks, parent_name, d); + break; + case K_DIV: + clk = r9a06g032_register_div(clocks, parent_name, d); + break; + case K_BITSEL: + /* keep that selector register around */ + uart_group_sel[d->dual.group] = d->dual.sel; + clk = r9a06g032_register_bitsel(clocks, parent_name, d); + break; + case K_DUALGATE: + clk = r9a06g032_register_dualgate(clocks, parent_name, + d, + uart_group_sel[d->dual.group]); + break; + } + clocks->data.clks[d->index] = clk; + } + error = of_clk_add_provider(np, of_clk_src_onecell_get, &clocks->data); + if (error) + return error; + + error = devm_add_action_or_reset(dev, + r9a06g032_clocks_del_clk_provider, np); + if (error) + return error; + + error = r9a06g032_add_clk_domain(dev); + if (error) + return error; + + sysctrl_priv = clocks; + + error = of_platform_populate(np, NULL, NULL, dev); + if (error) + dev_err(dev, "Failed to populate children (%d)\n", error); + + return 0; +} + +static const struct of_device_id r9a06g032_match[] = { + { .compatible = "renesas,r9a06g032-sysctrl" }, + { } +}; + +static struct platform_driver r9a06g032_clock_driver = { + .driver = { + .name = "renesas,r9a06g032-sysctrl", + .of_match_table = r9a06g032_match, + }, +}; + +static int __init r9a06g032_clocks_init(void) +{ + return platform_driver_probe(&r9a06g032_clock_driver, + r9a06g032_clocks_probe); +} + +subsys_initcall(r9a06g032_clocks_init); |