diff options
38 files changed, 2211 insertions, 82 deletions
diff --git a/Documentation/devicetree/bindings/clock/at91-clock.txt b/Documentation/devicetree/bindings/clock/at91-clock.txt index 51c259a92d02..d0adbf5ae144 100644 --- a/Documentation/devicetree/bindings/clock/at91-clock.txt +++ b/Documentation/devicetree/bindings/clock/at91-clock.txt @@ -91,6 +91,9 @@ Required properties: at91 audio pll output on AUDIOPLLCLK that feeds the PMC and can be used by peripheral clock or generic clock + "atmel,sama5d2-clk-i2s-mux" (under pmc node): + at91 I2S clock source selection + Required properties for SCKC node: - reg : defines the IO memory reserved for the SCKC. - #size-cells : shall be 0 (reg is used to encode clk id). @@ -507,3 +510,35 @@ For example: atmel,clk-output-range = <0 83000000>; }; }; + +Required properties for I2S mux clocks: +- #size-cells : shall be 0 (reg is used to encode I2S bus id). +- #address-cells : shall be 1 (reg is used to encode I2S bus id). +- name: device tree node describing a specific mux clock. + * #clock-cells : from common clock binding; shall be set to 0. + * clocks : shall be the mux clock parent phandles; shall be 2 phandles: + peripheral and generated clock; the first phandle shall belong to the + peripheral clock and the second one shall belong to the generated + clock; "clock-indices" property can be user to specify + the correct order. + * reg: I2S bus id of the corresponding mux clock. + e.g. reg = <0>; for i2s0, reg = <1>; for i2s1 + +For example: + i2s_clkmux { + compatible = "atmel,sama5d2-clk-i2s-mux"; + #address-cells = <1>; + #size-cells = <0>; + + i2s0muxck: i2s0_muxclk { + clocks = <&i2s0_clk>, <&i2s0_gclk>; + #clock-cells = <0>; + reg = <0>; + }; + + i2s1muxck: i2s1_muxclk { + clocks = <&i2s1_clk>, <&i2s1_gclk>; + #clock-cells = <0>; + reg = <1>; + }; + }; diff --git a/Documentation/devicetree/bindings/clock/maxim,max9485.txt b/Documentation/devicetree/bindings/clock/maxim,max9485.txt new file mode 100644 index 000000000000..61bec1100a94 --- /dev/null +++ b/Documentation/devicetree/bindings/clock/maxim,max9485.txt @@ -0,0 +1,59 @@ +Devicetree bindings for Maxim MAX9485 Programmable Audio Clock Generator + +This device exposes 4 clocks in total: + +- MAX9485_MCLKOUT: A gated, buffered output of the input clock of 27 MHz +- MAX9485_CLKOUT: A PLL that can be configured to 16 different discrete + frequencies +- MAX9485_CLKOUT[1,2]: Two gated outputs for MAX9485_CLKOUT + +MAX9485_CLKOUT[1,2] are children of MAX9485_CLKOUT which upchain all rate set +requests. + +Required properties: +- compatible: "maxim,max9485" +- clocks: Input clock, must provice 27.000 MHz +- clock-names: Must be set to "xclk" +- #clock-cells: From common clock binding; shall be set to 1 + +Optional properties: +- reset-gpios: GPIO descriptor connected to the #RESET input pin +- vdd-supply: A regulator node for Vdd +- clock-output-names: Name of output clocks, as defined in common clock + bindings + +If not explicitly set, the output names are "mclkout", "clkout", "clkout1" +and "clkout2". + +Clocks are defined as preprocessor macros in the dt-binding header. + +Example: + + #include <dt-bindings/clock/maxim,max9485.h> + + xo-27mhz: xo-27mhz { + compatible = "fixed-clock"; + #clock-cells = <0>; + clock-frequency = <27000000>; + }; + + &i2c0 { + max9485: audio-clock@63 { + reg = <0x63>; + compatible = "maxim,max9485"; + clock-names = "xclk"; + clocks = <&xo-27mhz>; + reset-gpios = <&gpio 1 GPIO_ACTIVE_HIGH>; + vdd-supply = <&3v3-reg>; + #clock-cells = <1>; + }; + }; + + // Clock consumer node + + foo@0 { + compatible = "bar,foo"; + /* ... */ + clock-names = "foo-input-clk"; + clocks = <&max9485 MAX9485_CLKOUT1>; + }; diff --git a/Documentation/devicetree/bindings/clock/renesas,r9a06g032-sysctrl.txt b/Documentation/devicetree/bindings/clock/renesas,r9a06g032-sysctrl.txt new file mode 100644 index 000000000000..d60b99756bb9 --- /dev/null +++ b/Documentation/devicetree/bindings/clock/renesas,r9a06g032-sysctrl.txt @@ -0,0 +1,43 @@ +* Renesas R9A06G032 SYSCTRL + +Required Properties: + + - compatible: Must be: + - "renesas,r9a06g032-sysctrl" + - reg: Base address and length of the SYSCTRL IO block. + - #clock-cells: Must be 1 + - clocks: References to the parent clocks: + - external 40mhz crystal. + - external (optional) 32.768khz + - external (optional) jtag input + - external (optional) RGMII_REFCLK + - clock-names: Must be: + clock-names = "mclk", "rtc", "jtag", "rgmii_ref_ext"; + +Examples +-------- + + - SYSCTRL node: + + sysctrl: system-controller@4000c000 { + compatible = "renesas,r9a06g032-sysctrl"; + reg = <0x4000c000 0x1000>; + #clock-cells = <1>; + + clocks = <&ext_mclk>, <&ext_rtc_clk>, + <&ext_jtag_clk>, <&ext_rgmii_ref>; + clock-names = "mclk", "rtc", "jtag", "rgmii_ref_ext"; + }; + + - Other nodes can use the clocks provided by SYSCTRL as in: + + #include <dt-bindings/clock/r9a06g032-sysctrl.h> + uart0: serial@40060000 { + compatible = "snps,dw-apb-uart"; + reg = <0x40060000 0x400>; + interrupts = <GIC_SPI 6 IRQ_TYPE_LEVEL_HIGH>; + reg-shift = <2>; + reg-io-width = <4>; + clocks = <&sysctrl R9A06G032_CLK_UART0>; + clock-names = "baudclk"; + }; diff --git a/arch/arm/mach-at91/Kconfig b/arch/arm/mach-at91/Kconfig index 1254bf9d91b4..903f23c309df 100644 --- a/arch/arm/mach-at91/Kconfig +++ b/arch/arm/mach-at91/Kconfig @@ -27,6 +27,7 @@ config SOC_SAMA5D2 select HAVE_AT91_H32MX select HAVE_AT91_GENERATED_CLK select HAVE_AT91_AUDIO_PLL + select HAVE_AT91_I2S_MUX_CLK select PINCTRL_AT91PIO4 help Select this if ou are using one of Microchip's SAMA5D2 family SoC. @@ -129,6 +130,9 @@ config HAVE_AT91_GENERATED_CLK config HAVE_AT91_AUDIO_PLL bool +config HAVE_AT91_I2S_MUX_CLK + bool + config SOC_SAM_V4_V5 bool diff --git a/drivers/clk/Kconfig b/drivers/clk/Kconfig index 721572a8c429..292056bbb30e 100644 --- a/drivers/clk/Kconfig +++ b/drivers/clk/Kconfig @@ -45,6 +45,12 @@ config COMMON_CLK_MAX77686 This driver supports Maxim 77620/77686/77802 crystal oscillator clock. +config COMMON_CLK_MAX9485 + tristate "Maxim 9485 Programmable Clock Generator" + depends on I2C + help + This driver supports Maxim 9485 Programmable Audio Clock Generator + config COMMON_CLK_RK808 tristate "Clock driver for RK805/RK808/RK818" depends on MFD_RK808 diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile index ae40cbe770f0..24fc2b634362 100644 --- a/drivers/clk/Makefile +++ b/drivers/clk/Makefile @@ -31,6 +31,7 @@ obj-$(CONFIG_COMMON_CLK_ASPEED) += clk-aspeed.o obj-$(CONFIG_ARCH_HIGHBANK) += clk-highbank.o obj-$(CONFIG_CLK_HSDK) += clk-hsdk-pll.o obj-$(CONFIG_COMMON_CLK_MAX77686) += clk-max77686.o +obj-$(CONFIG_COMMON_CLK_MAX9485) += clk-max9485.o obj-$(CONFIG_ARCH_MOXART) += clk-moxart.o obj-$(CONFIG_ARCH_NOMADIK) += clk-nomadik.o obj-$(CONFIG_ARCH_NPCM7XX) += clk-npcm7xx.o diff --git a/drivers/clk/at91/Makefile b/drivers/clk/at91/Makefile index 082596f37c1d..facc169ebb68 100644 --- a/drivers/clk/at91/Makefile +++ b/drivers/clk/at91/Makefile @@ -13,3 +13,4 @@ obj-$(CONFIG_HAVE_AT91_USB_CLK) += clk-usb.o obj-$(CONFIG_HAVE_AT91_SMD) += clk-smd.o obj-$(CONFIG_HAVE_AT91_H32MX) += clk-h32mx.o obj-$(CONFIG_HAVE_AT91_GENERATED_CLK) += clk-generated.o +obj-$(CONFIG_HAVE_AT91_I2S_MUX_CLK) += clk-i2s-mux.o diff --git a/drivers/clk/at91/clk-i2s-mux.c b/drivers/clk/at91/clk-i2s-mux.c new file mode 100644 index 000000000000..f0c3c3079f04 --- /dev/null +++ b/drivers/clk/at91/clk-i2s-mux.c @@ -0,0 +1,116 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2018 Microchip Technology Inc, + * Codrin Ciubotariu <codrin.ciubotariu@microchip.com> + * + * + */ + +#include <linux/clk-provider.h> +#include <linux/of.h> +#include <linux/mfd/syscon.h> +#include <linux/regmap.h> +#include <linux/slab.h> + +#include <soc/at91/atmel-sfr.h> + +#define I2S_BUS_NR 2 + +struct clk_i2s_mux { + struct clk_hw hw; + struct regmap *regmap; + u8 bus_id; +}; + +#define to_clk_i2s_mux(hw) container_of(hw, struct clk_i2s_mux, hw) + +static u8 clk_i2s_mux_get_parent(struct clk_hw *hw) +{ + struct clk_i2s_mux *mux = to_clk_i2s_mux(hw); + u32 val; + + regmap_read(mux->regmap, AT91_SFR_I2SCLKSEL, &val); + + return (val & BIT(mux->bus_id)) >> mux->bus_id; +} + +static int clk_i2s_mux_set_parent(struct clk_hw *hw, u8 index) +{ + struct clk_i2s_mux *mux = to_clk_i2s_mux(hw); + + return regmap_update_bits(mux->regmap, AT91_SFR_I2SCLKSEL, + BIT(mux->bus_id), index << mux->bus_id); +} + +static const struct clk_ops clk_i2s_mux_ops = { + .get_parent = clk_i2s_mux_get_parent, + .set_parent = clk_i2s_mux_set_parent, + .determine_rate = __clk_mux_determine_rate, +}; + +static struct clk_hw * __init +at91_clk_i2s_mux_register(struct regmap *regmap, const char *name, + const char * const *parent_names, + unsigned int num_parents, u8 bus_id) +{ + struct clk_init_data init = {}; + struct clk_i2s_mux *i2s_ck; + int ret; + + i2s_ck = kzalloc(sizeof(*i2s_ck), GFP_KERNEL); + if (!i2s_ck) + return ERR_PTR(-ENOMEM); + + init.name = name; + init.ops = &clk_i2s_mux_ops; + init.parent_names = parent_names; + init.num_parents = num_parents; + + i2s_ck->hw.init = &init; + i2s_ck->bus_id = bus_id; + i2s_ck->regmap = regmap; + + ret = clk_hw_register(NULL, &i2s_ck->hw); + if (ret) { + kfree(i2s_ck); + return ERR_PTR(ret); + } + + return &i2s_ck->hw; +} + +static void __init of_sama5d2_clk_i2s_mux_setup(struct device_node *np) +{ + struct regmap *regmap_sfr; + u8 bus_id; + const char *parent_names[2]; + struct device_node *i2s_mux_np; + struct clk_hw *hw; + int ret; + + regmap_sfr = syscon_regmap_lookup_by_compatible("atmel,sama5d2-sfr"); + if (IS_ERR(regmap_sfr)) + return; + + for_each_child_of_node(np, i2s_mux_np) { + if (of_property_read_u8(i2s_mux_np, "reg", &bus_id)) + continue; + + if (bus_id > I2S_BUS_NR) + continue; + + ret = of_clk_parent_fill(i2s_mux_np, parent_names, 2); + if (ret != 2) + continue; + + hw = at91_clk_i2s_mux_register(regmap_sfr, i2s_mux_np->name, + parent_names, 2, bus_id); + if (IS_ERR(hw)) + continue; + + of_clk_add_hw_provider(i2s_mux_np, of_clk_hw_simple_get, hw); + } +} + +CLK_OF_DECLARE(sama5d2_clk_i2s_mux, "atmel,sama5d2-clk-i2s-mux", + of_sama5d2_clk_i2s_mux_setup); diff --git a/drivers/clk/clk-max9485.c b/drivers/clk/clk-max9485.c new file mode 100644 index 000000000000..5e80f3d090f3 --- /dev/null +++ b/drivers/clk/clk-max9485.c @@ -0,0 +1,387 @@ +// SPDX-License-Identifier: GPL-2.0 + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/clk.h> +#include <linux/clk-provider.h> +#include <linux/err.h> +#include <linux/errno.h> +#include <linux/gpio/consumer.h> +#include <linux/i2c.h> +#include <linux/regulator/consumer.h> + +#include <dt-bindings/clock/maxim,max9485.h> + +#define MAX9485_NUM_CLKS 4 + +/* This chip has only one register of 8 bit width. */ + +#define MAX9485_FS_12KHZ (0 << 0) +#define MAX9485_FS_32KHZ (1 << 0) +#define MAX9485_FS_44_1KHZ (2 << 0) +#define MAX9485_FS_48KHZ (3 << 0) + +#define MAX9485_SCALE_256 (0 << 2) +#define MAX9485_SCALE_384 (1 << 2) +#define MAX9485_SCALE_768 (2 << 2) + +#define MAX9485_DOUBLE BIT(4) +#define MAX9485_CLKOUT1_ENABLE BIT(5) +#define MAX9485_CLKOUT2_ENABLE BIT(6) +#define MAX9485_MCLK_ENABLE BIT(7) +#define MAX9485_FREQ_MASK 0x1f + +struct max9485_rate { + unsigned long out; + u8 reg_value; +}; + +/* + * Ordered by frequency. For frequency the hardware can generate with + * multiple settings, the one with lowest jitter is listed first. + */ +static const struct max9485_rate max9485_rates[] = { + { 3072000, MAX9485_FS_12KHZ | MAX9485_SCALE_256 }, + { 4608000, MAX9485_FS_12KHZ | MAX9485_SCALE_384 }, + { 8192000, MAX9485_FS_32KHZ | MAX9485_SCALE_256 }, + { 9126000, MAX9485_FS_12KHZ | MAX9485_SCALE_768 }, + { 11289600, MAX9485_FS_44_1KHZ | MAX9485_SCALE_256 }, + { 12288000, MAX9485_FS_48KHZ | MAX9485_SCALE_256 }, + { 12288000, MAX9485_FS_32KHZ | MAX9485_SCALE_384 }, + { 16384000, MAX9485_FS_32KHZ | MAX9485_SCALE_256 | MAX9485_DOUBLE }, + { 16934400, MAX9485_FS_44_1KHZ | MAX9485_SCALE_384 }, + { 18384000, MAX9485_FS_48KHZ | MAX9485_SCALE_384 }, + { 22579200, MAX9485_FS_44_1KHZ | MAX9485_SCALE_256 | MAX9485_DOUBLE }, + { 24576000, MAX9485_FS_48KHZ | MAX9485_SCALE_256 | MAX9485_DOUBLE }, + { 24576000, MAX9485_FS_32KHZ | MAX9485_SCALE_384 | MAX9485_DOUBLE }, + { 24576000, MAX9485_FS_32KHZ | MAX9485_SCALE_768 }, + { 33868800, MAX9485_FS_44_1KHZ | MAX9485_SCALE_384 | MAX9485_DOUBLE }, + { 33868800, MAX9485_FS_44_1KHZ | MAX9485_SCALE_768 }, + { 36864000, MAX9485_FS_48KHZ | MAX9485_SCALE_384 | MAX9485_DOUBLE }, + { 36864000, MAX9485_FS_48KHZ | MAX9485_SCALE_768 }, + { 49152000, MAX9485_FS_32KHZ | MAX9485_SCALE_768 | MAX9485_DOUBLE }, + { 67737600, MAX9485_FS_44_1KHZ | MAX9485_SCALE_768 | MAX9485_DOUBLE }, + { 73728000, MAX9485_FS_48KHZ | MAX9485_SCALE_768 | MAX9485_DOUBLE }, + { } /* sentinel */ +}; + +struct max9485_driver_data; + +struct max9485_clk_hw { + struct clk_hw hw; + struct clk_init_data init; + u8 enable_bit; + struct max9485_driver_data *drvdata; +}; + +struct max9485_driver_data { + struct clk *xclk; + struct i2c_client *client; + u8 reg_value; + struct regulator *supply; + struct gpio_desc *reset_gpio; + struct max9485_clk_hw hw[MAX9485_NUM_CLKS]; +}; + +static inline struct max9485_clk_hw *to_max9485_clk(struct clk_hw *hw) +{ + return container_of(hw, struct max9485_clk_hw, hw); +} + +static int max9485_update_bits(struct max9485_driver_data *drvdata, + u8 mask, u8 value) +{ + int ret; + + drvdata->reg_value &= ~mask; + drvdata->reg_value |= value; + + dev_dbg(&drvdata->client->dev, + "updating mask 0x%02x value 0x%02x -> 0x%02x\n", + mask, value, drvdata->reg_value); + + ret = i2c_master_send(drvdata->client, + &drvdata->reg_value, + sizeof(drvdata->reg_value)); + + return ret < 0 ? ret : 0; +} + +static int max9485_clk_prepare(struct clk_hw *hw) +{ + struct max9485_clk_hw *clk_hw = to_max9485_clk(hw); + + return max9485_update_bits(clk_hw->drvdata, + clk_hw->enable_bit, + clk_hw->enable_bit); +} + +static void max9485_clk_unprepare(struct clk_hw *hw) +{ + struct max9485_clk_hw *clk_hw = to_max9485_clk(hw); + + max9485_update_bits(clk_hw->drvdata, clk_hw->enable_bit, 0); +} + +/* + * CLKOUT - configurable clock output + */ +static int max9485_clkout_set_rate(struct clk_hw *hw, unsigned long rate, + unsigned long parent_rate) +{ + struct max9485_clk_hw *clk_hw = to_max9485_clk(hw); + const struct max9485_rate *entry; + + for (entry = max9485_rates; entry->out != 0; entry++) + if (entry->out == rate) + break; + + if (entry->out == 0) + return -EINVAL; + + return max9485_update_bits(clk_hw->drvdata, + MAX9485_FREQ_MASK, + entry->reg_value); +} + +static unsigned long max9485_clkout_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + struct max9485_clk_hw *clk_hw = to_max9485_clk(hw); + struct max9485_driver_data *drvdata = clk_hw->drvdata; + u8 val = drvdata->reg_value & MAX9485_FREQ_MASK; + const struct max9485_rate *entry; + + for (entry = max9485_rates; entry->out != 0; entry++) + if (val == entry->reg_value) + return entry->out; + + return 0; +} + +static long max9485_clkout_round_rate(struct clk_hw *hw, unsigned long rate, + unsigned long *parent_rate) +{ + const struct max9485_rate *curr, *prev = NULL; + + for (curr = max9485_rates; curr->out != 0; curr++) { + /* Exact matches */ + if (curr->out == rate) + return rate; + + /* + * Find the first entry that has a frequency higher than the + * requested one. + */ + if (curr->out > rate) { + unsigned int mid; + + /* + * If this is the first entry, clamp the value to the + * lowest possible frequency. + */ + if (!prev) + return curr->out; + + /* + * Otherwise, determine whether the previous entry or + * current one is closer. + */ + mid = prev->out + ((curr->out - prev->out) / 2); + + return (mid > rate) ? prev->out : curr->out; + } + + prev = curr; + } + + /* If the last entry was still too high, clamp the value */ + return prev->out; +} + +struct max9485_clk { + const char *name; + int parent_index; + const struct clk_ops ops; + u8 enable_bit; +}; + +static const struct max9485_clk max9485_clks[MAX9485_NUM_CLKS] = { + [MAX9485_MCLKOUT] = { + .name = "mclkout", + .parent_index = -1, + .enable_bit = MAX9485_MCLK_ENABLE, + .ops = { + .prepare = max9485_clk_prepare, + .unprepare = max9485_clk_unprepare, + }, + }, + [MAX9485_CLKOUT] = { + .name = "clkout", + .parent_index = -1, + .ops = { + .set_rate = max9485_clkout_set_rate, + .round_rate = max9485_clkout_round_rate, + .recalc_rate = max9485_clkout_recalc_rate, + }, + }, + [MAX9485_CLKOUT1] = { + .name = "clkout1", + .parent_index = MAX9485_CLKOUT, + .enable_bit = MAX9485_CLKOUT1_ENABLE, + .ops = { + .prepare = max9485_clk_prepare, + .unprepare = max9485_clk_unprepare, + }, + }, + [MAX9485_CLKOUT2] = { + .name = "clkout2", + .parent_index = MAX9485_CLKOUT, + .enable_bit = MAX9485_CLKOUT2_ENABLE, + .ops = { + .prepare = max9485_clk_prepare, + .unprepare = max9485_clk_unprepare, + }, + }, +}; + +static struct clk_hw * +max9485_of_clk_get(struct of_phandle_args *clkspec, void *data) +{ + struct max9485_driver_data *drvdata = data; + unsigned int idx = clkspec->args[0]; + + return &drvdata->hw[idx].hw; +} + +static int max9485_i2c_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct max9485_driver_data *drvdata; + struct device *dev = &client->dev; + const char *xclk_name; + int i, ret; + + drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL); + if (!drvdata) + return -ENOMEM; + + drvdata->xclk = devm_clk_get(dev, "xclk"); + if (IS_ERR(drvdata->xclk)) + return PTR_ERR(drvdata->xclk); + + xclk_name = __clk_get_name(drvdata->xclk); + + drvdata->supply = devm_regulator_get(dev, "vdd"); + if (IS_ERR(drvdata->supply)) + return PTR_ERR(drvdata->supply); + + ret = regulator_enable(drvdata->supply); + if (ret < 0) + return ret; + + drvdata->reset_gpio = + devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH); + if (IS_ERR(drvdata->reset_gpio)) + return PTR_ERR(drvdata->reset_gpio); + + i2c_set_clientdata(client, drvdata); + drvdata->client = client; + + ret = i2c_master_recv(drvdata->client, &drvdata->reg_value, + sizeof(drvdata->reg_value)); + if (ret < 0) { + dev_warn(dev, "Unable to read device register: %d\n", ret); + return ret; + } + + for (i = 0; i < MAX9485_NUM_CLKS; i++) { + int parent_index = max9485_clks[i].parent_index; + const char *name; + + if (of_property_read_string_index(dev->of_node, + "clock-output-names", + i, &name) == 0) { + drvdata->hw[i].init.name = name; + } else { + drvdata->hw[i].init.name = max9485_clks[i].name; + } + + drvdata->hw[i].init.ops = &max9485_clks[i].ops; + drvdata->hw[i].init.num_parents = 1; + drvdata->hw[i].init.flags = 0; + + if (parent_index > 0) { + drvdata->hw[i].init.parent_names = + &drvdata->hw[parent_index].init.name; + drvdata->hw[i].init.flags |= CLK_SET_RATE_PARENT; + } else { + drvdata->hw[i].init.parent_names = &xclk_name; + } + + drvdata->hw[i].enable_bit = max9485_clks[i].enable_bit; + drvdata->hw[i].hw.init = &drvdata->hw[i].init; + drvdata->hw[i].drvdata = drvdata; + + ret = devm_clk_hw_register(dev, &drvdata->hw[i].hw); + if (ret < 0) + return ret; + } + + return devm_of_clk_add_hw_provider(dev, max9485_of_clk_get, drvdata); +} + +static int __maybe_unused max9485_suspend(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + struct max9485_driver_data *drvdata = i2c_get_clientdata(client); + + gpiod_set_value_cansleep(drvdata->reset_gpio, 0); + + return 0; +} + +static int __maybe_unused max9485_resume(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + struct max9485_driver_data *drvdata = i2c_get_clientdata(client); + int ret; + + gpiod_set_value_cansleep(drvdata->reset_gpio, 1); + + ret = i2c_master_send(client, &drvdata->reg_value, + sizeof(drvdata->reg_value)); + + return ret < 0 ? ret : 0; +} + +static const struct dev_pm_ops max9485_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(max9485_suspend, max9485_resume) +}; + +static const struct of_device_id max9485_dt_ids[] = { + { .compatible = "maxim,max9485", }, + { } +}; +MODULE_DEVICE_TABLE(of, max9485_dt_ids); + +static const struct i2c_device_id max9485_i2c_ids[] = { + { .name = "max9485", }, + { } +}; +MODULE_DEVICE_TABLE(i2c, max9485_i2c_ids); + +static struct i2c_driver max9485_driver = { + .driver = { + .name = "max9485", + .pm = &max9485_pm_ops, + .of_match_table = max9485_dt_ids, + }, + .probe = max9485_i2c_probe, + .id_table = max9485_i2c_ids, +}; +module_i2c_driver(max9485_driver); + +MODULE_AUTHOR("Daniel Mack <daniel@zonque.org>"); +MODULE_DESCRIPTION("MAX9485 Programmable Audio Clock Generator"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/clk/clk-si514.c b/drivers/clk/clk-si514.c index 09b6718956bd..153b3a2b5857 100644 --- a/drivers/clk/clk-si514.c +++ b/drivers/clk/clk-si514.c @@ -74,6 +74,33 @@ static int si514_enable_output(struct clk_si514 *data, bool enable) SI514_CONTROL_OE, enable ? SI514_CONTROL_OE : 0); } +static int si514_prepare(struct clk_hw *hw) +{ + struct clk_si514 *data = to_clk_si514(hw); + + return si514_enable_output(data, true); +} + +static void si514_unprepare(struct clk_hw *hw) +{ + struct clk_si514 *data = to_clk_si514(hw); + + si514_enable_output(data, false); +} + +static int si514_is_prepared(struct clk_hw *hw) +{ + struct clk_si514 *data = to_clk_si514(hw); + unsigned int val; + int err; + + err = regmap_read(data->regmap, SI514_REG_CONTROL, &val); + if (err < 0) + return err; + + return !!(val & SI514_CONTROL_OE); +} + /* Retrieve clock multiplier and dividers from hardware */ static int si514_get_muldiv(struct clk_si514 *data, struct clk_si514_muldiv *settings) @@ -235,12 +262,17 @@ static int si514_set_rate(struct clk_hw *hw, unsigned long rate, { struct clk_si514 *data = to_clk_si514(hw); struct clk_si514_muldiv settings; + unsigned int old_oe_state; int err; err = si514_calc_muldiv(&settings, rate); if (err) return err; + err = regmap_read(data->regmap, SI514_REG_CONTROL, &old_oe_state); |