OMAP3 has interface clocks in addition to functional clocks, which require special handling for the autoidle and idle status register offsets mainly.
Signed-off-by: Tero Kristo <t-kri...@ti.com> --- .../devicetree/bindings/clock/ti/interface.txt | 54 ++++++++ arch/arm/mach-omap2/clock.h | 5 - drivers/clk/ti/Makefile | 1 + drivers/clk/ti/interface.c | 139 ++++++++++++++++++++ include/linux/clk/ti.h | 5 + 5 files changed, 199 insertions(+), 5 deletions(-) create mode 100644 Documentation/devicetree/bindings/clock/ti/interface.txt create mode 100644 drivers/clk/ti/interface.c diff --git a/Documentation/devicetree/bindings/clock/ti/interface.txt b/Documentation/devicetree/bindings/clock/ti/interface.txt new file mode 100644 index 0000000..064e8ca --- /dev/null +++ b/Documentation/devicetree/bindings/clock/ti/interface.txt @@ -0,0 +1,54 @@ +Binding for Texas Instruments interface clock. + +Binding status: Unstable - ABI compatibility may be broken in the future + +This binding uses the common clock binding[1]. This clock is +quite much similar to the basic gate-clock [2], however, +it supports a number of additional features, including +companion clock finding (match corresponding functional gate +clock) and hardware autoidle enable / disable. + +[1] Documentation/devicetree/bindings/clock/clock-bindings.txt +[2] Documentation/devicetree/bindings/clock/gate-clock.txt + +Required properties: +- compatible : shall be one of: + "ti,omap3-interface-clock" - basic OMAP3 interface clock + "ti,omap3-no-wait-interface-clock" - interface clock which has no hardware + capability for waiting clock to be ready + "ti,omap3-hsotgusb-interface-clock" - interface clock with USB specific HW + handling + "ti,omap3-dss-interface-clock" - interface clock with DSS specific HW handling + "ti,omap3-ssi-interface-clock" - interface clock with SSI specific HW handling + "ti,am35xx-interface-clock" - interface clock with AM35xx specific HW handling +- #clock-cells : from common clock binding; shall be set to 0 +- clocks : link to phandle of parent clock +- reg : base address for the control register + +Optional properties: +- ti,bit-shift : bit shift for the bit enabling/disabling the clock (default 0) + +Examples: + aes1_ick: aes1_ick@48004a14 { + #clock-cells = <0>; + compatible = "ti,omap3-interface-clock"; + clocks = <&security_l4_ick2>; + reg = <0x48004a14 0x4>; + ti,bit-shift = <3>; + }; + + cam_ick: cam_ick@48004f10 { + #clock-cells = <0>; + compatible = "ti,omap3-no-wait-interface-clock"; + clocks = <&l4_ick>; + reg = <0x48004f10 0x4>; + ti,bit-shift = <0>; + }; + + ssi_ick_3430es2: ssi_ick_3430es2@48004a10 { + #clock-cells = <0>; + compatible = "ti,omap3-ssi-interface-clock"; + clocks = <&ssi_l4_ick>; + reg = <0x48004a10 0x4>; + ti,bit-shift = <0>; + }; diff --git a/arch/arm/mach-omap2/clock.h b/arch/arm/mach-omap2/clock.h index b33f1e8..d1b227e 100644 --- a/arch/arm/mach-omap2/clock.h +++ b/arch/arm/mach-omap2/clock.h @@ -266,13 +266,8 @@ extern const struct clksel_rate gfx_l3_rates[]; extern const struct clksel_rate dsp_ick_rates[]; extern struct clk dummy_ck; -extern const struct clk_hw_omap_ops clkhwops_iclk; extern const struct clk_hw_omap_ops clkhwops_omap3430es2_ssi_wait; -extern const struct clk_hw_omap_ops clkhwops_omap3430es2_iclk_ssi_wait; -extern const struct clk_hw_omap_ops clkhwops_omap3430es2_iclk_dss_usbhost_wait; -extern const struct clk_hw_omap_ops clkhwops_omap3430es2_iclk_hsotgusb_wait; extern const struct clk_hw_omap_ops clkhwops_omap3430es2_hsotgusb_wait; -extern const struct clk_hw_omap_ops clkhwops_am35xx_ipss_wait; extern const struct clk_hw_omap_ops clkhwops_apll54; extern const struct clk_hw_omap_ops clkhwops_apll96; extern const struct clk_hw_omap_ops clkhwops_omap2xxx_dpll; diff --git a/drivers/clk/ti/Makefile b/drivers/clk/ti/Makefile index 7eb6f2b..e42a703 100644 --- a/drivers/clk/ti/Makefile +++ b/drivers/clk/ti/Makefile @@ -3,6 +3,7 @@ obj-y += clk.o dpll.o autoidle.o divider.o \ fixed-factor.o gate.o clockdomain.o \ composite.o mux.o apll.o obj-$(CONFIG_SOC_AM33XX) += clk-33xx.o +obj-$(CONFIG_ARCH_OMAP3) += interface.o obj-$(CONFIG_ARCH_OMAP4) += clk-44xx.o obj-$(CONFIG_SOC_OMAP5) += clk-54xx.o obj-$(CONFIG_SOC_DRA7XX) += clk-7xx.o diff --git a/drivers/clk/ti/interface.c b/drivers/clk/ti/interface.c new file mode 100644 index 0000000..c5f25d9 --- /dev/null +++ b/drivers/clk/ti/interface.c @@ -0,0 +1,139 @@ +/* + * OMAP interface clock support + * + * Copyright (C) 2013 Texas Instruments, Inc. + * + * Tero Kristo <t-kri...@ti.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed "as is" WITHOUT ANY WARRANTY of any + * kind, whether express or implied; without even the implied warranty + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/clk-provider.h> +#include <linux/slab.h> +#include <linux/of.h> +#include <linux/of_address.h> +#include <linux/clk/ti.h> + +static const struct clk_ops ti_interface_clk_ops = { + .init = &omap2_init_clk_clkdm, + .enable = &omap2_dflt_clk_enable, + .disable = &omap2_dflt_clk_disable, + .is_enabled = &omap2_dflt_clk_is_enabled, +}; + +static int __init _of_ti_interface_clk_setup(struct device_node *node, + const struct clk_hw_omap_ops *ops, + struct regmap *regmap) +{ + struct clk *clk; + struct clk_init_data init = { NULL }; + struct clk_hw_omap *clk_hw; + const char *clk_name = node->name; + const char *parent_name; + u32 val; + int ret = 0; + + clk_hw = kzalloc(sizeof(*clk_hw), GFP_KERNEL); + if (!clk_hw) { + pr_err("%s: could not allocate clk_hw_omap\n", __func__); + return -ENOMEM; + } + + clk_hw->hw.init = &init; + clk_hw->ops = ops; + + if (!of_property_read_u32(node, "reg", &val)) + clk_hw->enable_reg = (void *)val; + + clk_hw->regmap = regmap; + + if (!of_property_read_u32(node, "ti,bit-shift", &val)) + clk_hw->enable_bit = val; + + of_property_read_string(node, "clock-output-names", &clk_name); + + init.name = clk_name; + init.ops = &ti_interface_clk_ops; + init.flags = 0; + + parent_name = of_clk_get_parent_name(node, 0); + if (!parent_name) { + pr_err("%s: %s must have a parent\n", __func__, clk_name); + ret = -EINVAL; + goto cleanup; + } + + init.num_parents = 1; + init.parent_names = &parent_name; + + clk = clk_register(NULL, &clk_hw->hw); + + if (!IS_ERR(clk)) { + of_clk_add_provider(node, of_clk_src_simple_get, clk); + omap2_init_clk_hw_omap_clocks(clk); + return 0; + } + ret = PTR_ERR(clk); + +cleanup: + kfree(clk_hw); + return ret; +} + +static int __init of_ti_interface_clk_setup(struct device_node *node, + struct regmap *regmap) +{ + return _of_ti_interface_clk_setup(node, &clkhwops_iclk_wait, regmap); +} +CLK_OF_DECLARE(ti_interface_clk, "ti,omap3-interface-clock", + of_ti_interface_clk_setup); + +static int __init of_ti_no_wait_interface_clk_setup(struct device_node *node, + struct regmap *regmap) +{ + return _of_ti_interface_clk_setup(node, &clkhwops_iclk, regmap); +} +CLK_OF_DECLARE(ti_no_wait_interface_clk, "ti,omap3-no-wait-interface-clock", + of_ti_no_wait_interface_clk_setup); + +static int __init of_ti_hsotgusb_interface_clk_setup(struct device_node *node, + struct regmap *regmap) +{ + return _of_ti_interface_clk_setup(node, &clkhwops_omap3430es2_iclk_hsotgusb_wait, regmap); +} +CLK_OF_DECLARE(ti_hsotgusb_interface_clk, "ti,omap3-hsotgusb-interface-clock", + of_ti_hsotgusb_interface_clk_setup); + +static int __init of_ti_dss_interface_clk_setup(struct device_node *node, + struct regmap *regmap) +{ + return _of_ti_interface_clk_setup(node, &clkhwops_omap3430es2_iclk_dss_usbhost_wait, regmap); +} +CLK_OF_DECLARE(ti_dss_interface_clk, "ti,omap3-dss-interface-clock", + of_ti_dss_interface_clk_setup); + +static int __init of_ti_ssi_interface_clk_setup(struct device_node *node, + struct regmap *regmap) +{ + return _of_ti_interface_clk_setup(node, + &clkhwops_omap3430es2_iclk_ssi_wait, + regmap); +} +CLK_OF_DECLARE(ti_ssi_interface_clk, "ti,omap3-ssi-interface-clock", + of_ti_ssi_interface_clk_setup); + +static int __init of_ti_am35xx_interface_clk_setup(struct device_node *node, + struct regmap *regmap) +{ + return _of_ti_interface_clk_setup(node, &clkhwops_am35xx_ipss_wait, + regmap); +} +CLK_OF_DECLARE(ti_am35xx_interface_clk, "ti,am35xx-interface-clock", + of_ti_am35xx_interface_clk_setup); diff --git a/include/linux/clk/ti.h b/include/linux/clk/ti.h index de0cffc..a197704 100644 --- a/include/linux/clk/ti.h +++ b/include/linux/clk/ti.h @@ -243,6 +243,11 @@ extern const struct clk_hw_omap_ops clkhwops_omap4_dpllmx; extern const struct clk_hw_omap_ops clkhwops_wait; extern const struct clk_hw_omap_ops clkhwops_omap3430es2_dss_usbhost_wait; extern const struct clk_hw_omap_ops clkhwops_am35xx_ipss_module_wait; +extern const struct clk_hw_omap_ops clkhwops_am35xx_ipss_wait; +extern const struct clk_hw_omap_ops clkhwops_iclk; extern const struct clk_hw_omap_ops clkhwops_iclk_wait; +extern const struct clk_hw_omap_ops clkhwops_omap3430es2_iclk_ssi_wait; +extern const struct clk_hw_omap_ops clkhwops_omap3430es2_iclk_dss_usbhost_wait; +extern const struct clk_hw_omap_ops clkhwops_omap3430es2_iclk_hsotgusb_wait; #endif -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html