From 7cabf9251a2f38db1ad1e49be2738955ab61d381 Mon Sep 17 00:00:00 2001 From: David Lechner Date: Sun, 1 Sep 2019 17:58:22 -0500 Subject: bus/ti-pwmss: move TI PWMSS driver from PWM to bus subsystem The TI PWMSS driver is a simple bus driver for providing power power management for the PWM peripherals on TI AM33xx SoCs, namely eCAP, eHRPWM and eQEP. The eQEP is a counter rather than a PWM, so it does not make sense to have the bus driver in the PWM subsystem since the PWMSS is not exclusive to PWM devices. Signed-off-by: David Lechner Signed-off-by: Jonathan Cameron --- drivers/bus/Kconfig | 9 +++++++++ drivers/bus/Makefile | 1 + drivers/bus/ti-pwmss.c | 55 ++++++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 65 insertions(+) create mode 100644 drivers/bus/ti-pwmss.c (limited to 'drivers/bus') diff --git a/drivers/bus/Kconfig b/drivers/bus/Kconfig index 6b331061d34b..3fab1dfd2e93 100644 --- a/drivers/bus/Kconfig +++ b/drivers/bus/Kconfig @@ -150,6 +150,15 @@ config TEGRA_GMI Driver for the Tegra Generic Memory Interface bus which can be used to attach devices such as NOR, UART, FPGA and more. +config TI_PWMSS + bool + default y if (ARCH_OMAP2PLUS) && (PWM_TIECAP || PWM_TIEHRPWM) + help + PWM Subsystem driver support for AM33xx SOC. + + PWM submodules require PWM config space access from submodule + drivers and require common parent driver support. + config TI_SYSC bool "TI sysc interconnect target module driver" depends on ARCH_OMAP2PLUS diff --git a/drivers/bus/Makefile b/drivers/bus/Makefile index 16b43d3468c6..1320bcf9fa9d 100644 --- a/drivers/bus/Makefile +++ b/drivers/bus/Makefile @@ -27,6 +27,7 @@ obj-$(CONFIG_SUNXI_RSB) += sunxi-rsb.o obj-$(CONFIG_SIMPLE_PM_BUS) += simple-pm-bus.o obj-$(CONFIG_TEGRA_ACONNECT) += tegra-aconnect.o obj-$(CONFIG_TEGRA_GMI) += tegra-gmi.o +obj-$(CONFIG_TI_PWMSS) += ti-pwmss.o obj-$(CONFIG_TI_SYSC) += ti-sysc.o obj-$(CONFIG_TS_NBUS) += ts-nbus.o obj-$(CONFIG_UNIPHIER_SYSTEM_BUS) += uniphier-system-bus.o diff --git a/drivers/bus/ti-pwmss.c b/drivers/bus/ti-pwmss.c new file mode 100644 index 000000000000..e9c26c94251b --- /dev/null +++ b/drivers/bus/ti-pwmss.c @@ -0,0 +1,55 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * TI PWM Subsystem driver + * + * Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com/ + */ + +#include +#include +#include +#include +#include +#include + +static const struct of_device_id pwmss_of_match[] = { + { .compatible = "ti,am33xx-pwmss" }, + {}, +}; +MODULE_DEVICE_TABLE(of, pwmss_of_match); + +static int pwmss_probe(struct platform_device *pdev) +{ + int ret; + struct device_node *node = pdev->dev.of_node; + + pm_runtime_enable(&pdev->dev); + + /* Populate all the child nodes here... */ + ret = of_platform_populate(node, NULL, NULL, &pdev->dev); + if (ret) + dev_err(&pdev->dev, "no child node found\n"); + + return ret; +} + +static int pwmss_remove(struct platform_device *pdev) +{ + pm_runtime_disable(&pdev->dev); + return 0; +} + +static struct platform_driver pwmss_driver = { + .driver = { + .name = "pwmss", + .of_match_table = pwmss_of_match, + }, + .probe = pwmss_probe, + .remove = pwmss_remove, +}; + +module_platform_driver(pwmss_driver); + +MODULE_DESCRIPTION("PWM Subsystem driver"); +MODULE_AUTHOR("Texas Instruments"); +MODULE_LICENSE("GPL"); -- cgit From f213729f679619e70669c2b440886929595d26e5 Mon Sep 17 00:00:00 2001 From: David Lechner Date: Sun, 1 Sep 2019 17:58:24 -0500 Subject: counter: new TI eQEP driver This adds a new counter driver for the Texas Instruments Enhanced Quadrature Encoder Pulse (eQEP) module. Only very basic functionality is currently implemented - only enough to be able to read the position. The actual device has many more features which can be added to the driver on an as-needed basis. It is not possible to read the QEPA/B signal values in hardware, so that feature is omitted. The TI_PWMSS kernel option is selected in Kconfig to enable the parent bus, which is needed for power management. Signed-off-by: David Lechner Signed-off-by: Jonathan Cameron --- drivers/bus/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/bus') diff --git a/drivers/bus/Kconfig b/drivers/bus/Kconfig index 3fab1dfd2e93..97ab5ad171d4 100644 --- a/drivers/bus/Kconfig +++ b/drivers/bus/Kconfig @@ -152,7 +152,7 @@ config TEGRA_GMI config TI_PWMSS bool - default y if (ARCH_OMAP2PLUS) && (PWM_TIECAP || PWM_TIEHRPWM) + default y if (ARCH_OMAP2PLUS) && (PWM_TIECAP || PWM_TIEHRPWM || TI_EQEP) help PWM Subsystem driver support for AM33xx SOC. -- cgit