diff options
Diffstat (limited to 'drivers')
7 files changed, 52 insertions, 332 deletions
diff --git a/drivers/staging/media/atomisp/Kconfig b/drivers/staging/media/atomisp/Kconfig index 52b86b7e433f..27f078749148 100644 --- a/drivers/staging/media/atomisp/Kconfig +++ b/drivers/staging/media/atomisp/Kconfig @@ -1,6 +1,7 @@ menuconfig INTEL_ATOMISP bool "Enable support to Intel MIPI camera drivers" depends on X86 && EFI && MEDIA_CONTROLLER && PCI && ACPI + select COMMON_CLK help Enable support for the Intel ISP2 camera interfaces and MIPI sensor drivers. diff --git a/drivers/staging/media/atomisp/platform/Makefile b/drivers/staging/media/atomisp/platform/Makefile index df157630bda9..0e3b7e1c81c6 100644 --- a/drivers/staging/media/atomisp/platform/Makefile +++ b/drivers/staging/media/atomisp/platform/Makefile @@ -2,5 +2,4 @@ # Makefile for camera drivers. # -obj-$(CONFIG_INTEL_ATOMISP) += clock/ obj-$(CONFIG_INTEL_ATOMISP) += intel-mid/ diff --git a/drivers/staging/media/atomisp/platform/clock/Makefile b/drivers/staging/media/atomisp/platform/clock/Makefile deleted file mode 100644 index 82fbe8b6968a..000000000000 --- a/drivers/staging/media/atomisp/platform/clock/Makefile +++ /dev/null @@ -1,6 +0,0 @@ -# -# Makefile for clock devices. -# - -obj-$(CONFIG_INTEL_ATOMISP) += vlv2_plat_clock.o -obj-$(CONFIG_INTEL_ATOMISP) += platform_vlv2_plat_clk.o diff --git a/drivers/staging/media/atomisp/platform/clock/platform_vlv2_plat_clk.c b/drivers/staging/media/atomisp/platform/clock/platform_vlv2_plat_clk.c deleted file mode 100644 index 0aae9b0283bb..000000000000 --- a/drivers/staging/media/atomisp/platform/clock/platform_vlv2_plat_clk.c +++ /dev/null @@ -1,40 +0,0 @@ -/* - * platform_vlv2_plat_clk.c - VLV2 platform clock driver - * Copyright (C) 2013 Intel Corporation - * - * Author: Asutosh Pathak <asutosh.pathak@intel.com> - * Author: Chandra Sekhar Anagani <chandra.sekhar.anagani@intel.com> - * Author: Sergio Aguirre <sergio.a.aguirre.rodriguez@intel.com> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; version 2 of the License. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - */ - -#include <linux/device.h> -#include <linux/err.h> -#include <linux/module.h> -#include <linux/platform_device.h> -#include <linux/printk.h> - -static int __init vlv2_plat_clk_init(void) -{ - struct platform_device *pdev; - - pdev = platform_device_register_simple("vlv2_plat_clk", -1, NULL, 0); - if (IS_ERR(pdev)) { - pr_err("platform_vlv2_plat_clk:register failed: %ld\n", - PTR_ERR(pdev)); - return PTR_ERR(pdev); - } - - return 0; -} - -device_initcall(vlv2_plat_clk_init); diff --git a/drivers/staging/media/atomisp/platform/clock/platform_vlv2_plat_clk.h b/drivers/staging/media/atomisp/platform/clock/platform_vlv2_plat_clk.h deleted file mode 100644 index 3bc0de129780..000000000000 --- a/drivers/staging/media/atomisp/platform/clock/platform_vlv2_plat_clk.h +++ /dev/null @@ -1,26 +0,0 @@ -/* - * platform_vlv2_plat_clk.h: platform clock driver library header file - * Copyright (C) 2013 Intel Corporation - * - * Author: Asutosh Pathak <asutosh.pathak@intel.com> - * Author: Chandra Sekhar Anagani <chandra.sekhar.anagani@intel.com> - * Author: Sergio Aguirre <sergio.a.aguirre.rodriguez@intel.com> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; version 2 of the License. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - */ -#ifndef _PLATFORM_VLV2_PLAT_CLK_H_ -#define _PLATFORM_VLV2_PLAT_CLK_H_ - -#include <linux/sfi.h> - -extern void __init *vlv2_plat_clk_device_platform_data( - void *info) __attribute__((weak)); -#endif diff --git a/drivers/staging/media/atomisp/platform/clock/vlv2_plat_clock.c b/drivers/staging/media/atomisp/platform/clock/vlv2_plat_clock.c deleted file mode 100644 index f96789a31819..000000000000 --- a/drivers/staging/media/atomisp/platform/clock/vlv2_plat_clock.c +++ /dev/null @@ -1,247 +0,0 @@ -/* - * vlv2_plat_clock.c - VLV2 platform clock driver - * Copyright (C) 2013 Intel Corporation - * - * Author: Asutosh Pathak <asutosh.pathak@intel.com> - * Author: Chandra Sekhar Anagani <chandra.sekhar.anagani@intel.com> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; version 2 of the License. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public License along - * with this program; if not, write to the Free Software Foundation, Inc., - * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. - */ - -#include <linux/err.h> -#include <linux/io.h> -#include <linux/init.h> -#include <linux/platform_device.h> -#include "../../include/linux/vlv2_plat_clock.h" - -/* NOTE: Most of below constants could come from platform data. - * To be fixed when appropriate ACPI support comes. - */ -#define VLV2_PMC_CLK_BASE_ADDRESS 0xfed03060 -#define PLT_CLK_CTL_OFFSET(x) (0x04 * (x)) - -#define CLK_CONFG_BIT_POS 0 -#define CLK_CONFG_BIT_LEN 2 -#define CLK_CONFG_D3_GATED 0 -#define CLK_CONFG_FORCE_ON 1 -#define CLK_CONFG_FORCE_OFF 2 - -#define CLK_FREQ_TYPE_BIT_POS 2 -#define CLK_FREQ_TYPE_BIT_LEN 1 -#define CLK_FREQ_TYPE_XTAL 0 /* 25 MHz */ -#define CLK_FREQ_TYPE_PLL 1 /* 19.2 MHz */ - -#define MAX_CLK_COUNT 5 - -/* Helper macros to manipulate bitfields */ -#define REG_MASK(n) (((1 << (n##_BIT_LEN)) - 1) << (n##_BIT_POS)) -#define REG_SET_FIELD(r, n, v) (((r) & ~REG_MASK(n)) | \ - (((v) << (n##_BIT_POS)) & REG_MASK(n))) -#define REG_GET_FIELD(r, n) (((r) & REG_MASK(n)) >> n##_BIT_POS) -/* - * vlv2 platform has 6 platform clocks, controlled by 4 byte registers - * Total size required for mapping is 6*4 = 24 bytes - */ -#define PMC_MAP_SIZE 24 - -static DEFINE_MUTEX(clk_mutex); -static void __iomem *pmc_base; - -/* - * vlv2_plat_set_clock_freq - Set clock frequency to a specified platform clock - * @clk_num: Platform clock number (i.e. 0, 1, 2, ...,5) - * @freq_type: Clock frequency (0-25 MHz(XTAL), 1-19.2 MHz(PLL) ) - */ -int vlv2_plat_set_clock_freq(int clk_num, int freq_type) -{ - void __iomem *addr; - - if (clk_num < 0 || clk_num >= MAX_CLK_COUNT) { - pr_err("Clock number out of range (%d)\n", clk_num); - return -EINVAL; - } - - if (freq_type != CLK_FREQ_TYPE_XTAL && - freq_type != CLK_FREQ_TYPE_PLL) { - pr_err("wrong clock type\n"); - return -EINVAL; - } - - if (!pmc_base) { - pr_err("memio map is not set\n"); - return -EINVAL; - } - - addr = pmc_base + PLT_CLK_CTL_OFFSET(clk_num); - - mutex_lock(&clk_mutex); - writel(REG_SET_FIELD(readl(addr), CLK_FREQ_TYPE, freq_type), addr); - mutex_unlock(&clk_mutex); - - return 0; -} -EXPORT_SYMBOL_GPL(vlv2_plat_set_clock_freq); - -/* - * vlv2_plat_get_clock_freq - Get the status of specified platform clock - * @clk_num: Platform clock number (i.e. 0, 1, 2, ...,5) - * - * Returns 0 for 25 MHz(XTAL) and 1 for 19.2 MHz(PLL) - */ -int vlv2_plat_get_clock_freq(int clk_num) -{ - u32 ret; - - if (clk_num < 0 || clk_num >= MAX_CLK_COUNT) { - pr_err("Clock number out of range (%d)\n", clk_num); - return -EINVAL; - } - - if (!pmc_base) { - pr_err("memio map is not set\n"); - return -EINVAL; - } - - mutex_lock(&clk_mutex); - ret = REG_GET_FIELD(readl(pmc_base + PLT_CLK_CTL_OFFSET(clk_num)), - CLK_FREQ_TYPE); - mutex_unlock(&clk_mutex); - return ret; -} -EXPORT_SYMBOL_GPL(vlv2_plat_get_clock_freq); - -/* - * vlv2_plat_configure_clock - Configure the specified platform clock - * @clk_num: Platform clock number (i.e. 0, 1, 2, ...,5) - * @conf: Clock gating: - * 0 - Clock gated on D3 state - * 1 - Force on - * 2,3 - Force off - */ -int vlv2_plat_configure_clock(int clk_num, u32 conf) -{ - void __iomem *addr; - - if (clk_num < 0 || clk_num >= MAX_CLK_COUNT) { - pr_err("Clock number out of range (%d)\n", clk_num); - return -EINVAL; - } - - if (conf != CLK_CONFG_D3_GATED && - conf != CLK_CONFG_FORCE_ON && - conf != CLK_CONFG_FORCE_OFF) { - pr_err("Invalid clock configuration requested\n"); - return -EINVAL; - } - - if (!pmc_base) { - pr_err("memio map is not set\n"); - return -EINVAL; - } - - addr = pmc_base + PLT_CLK_CTL_OFFSET(clk_num); - - mutex_lock(&clk_mutex); - writel(REG_SET_FIELD(readl(addr), CLK_CONFG, conf), addr); - mutex_unlock(&clk_mutex); - return 0; -} -EXPORT_SYMBOL_GPL(vlv2_plat_configure_clock); - -/* - * vlv2_plat_get_clock_status - Get the status of specified platform clock - * @clk_num: Platform clock number (i.e. 0, 1, 2, ...,5) - * - * Returns 1 - On, 0 - Off - */ -int vlv2_plat_get_clock_status(int clk_num) -{ - int ret; - - if (clk_num < 0 || clk_num >= MAX_CLK_COUNT) { - pr_err("Clock number out of range (%d)\n", clk_num); - return -EINVAL; - } - - if (!pmc_base) { - pr_err("memio map is not set\n"); - return -EINVAL; - } - - mutex_lock(&clk_mutex); - ret = (int)REG_GET_FIELD(readl(pmc_base + PLT_CLK_CTL_OFFSET(clk_num)), - CLK_CONFG); - mutex_unlock(&clk_mutex); - return ret; -} -EXPORT_SYMBOL_GPL(vlv2_plat_get_clock_status); - -static int vlv2_plat_clk_probe(struct platform_device *pdev) -{ - int i = 0; - - pmc_base = ioremap_nocache(VLV2_PMC_CLK_BASE_ADDRESS, PMC_MAP_SIZE); - if (!pmc_base) { - dev_err(&pdev->dev, "I/O memory remapping failed\n"); - return -ENOMEM; - } - - /* Initialize all clocks as disabled */ - for (i = 0; i < MAX_CLK_COUNT; i++) - vlv2_plat_configure_clock(i, CLK_CONFG_FORCE_OFF); - - dev_info(&pdev->dev, "vlv2_plat_clk initialized\n"); - return 0; -} - -static const struct platform_device_id vlv2_plat_clk_id[] = { - {"vlv2_plat_clk", 0}, - {} -}; - -static int vlv2_resume(struct device *device) -{ - int i; - - /* Initialize all clocks as disabled */ - for (i = 0; i < MAX_CLK_COUNT; i++) - vlv2_plat_configure_clock(i, CLK_CONFG_FORCE_OFF); - - return 0; -} - -static int vlv2_suspend(struct device *device) -{ - return 0; -} - -static const struct dev_pm_ops vlv2_pm_ops = { - .suspend = vlv2_suspend, - .resume = vlv2_resume, -}; - -static struct platform_driver vlv2_plat_clk_driver = { - .probe = vlv2_plat_clk_probe, - .id_table = vlv2_plat_clk_id, - .driver = { - .name = "vlv2_plat_clk", - .pm = &vlv2_pm_ops, - }, -}; - -static int __init vlv2_plat_clk_init(void) -{ - return platform_driver_register(&vlv2_plat_clk_driver); -} -arch_initcall(vlv2_plat_clk_init); diff --git a/drivers/staging/media/atomisp/platform/intel-mid/atomisp_gmin_platform.c b/drivers/staging/media/atomisp/platform/intel-mid/atomisp_gmin_platform.c index edaae93af8f9..17b4cfae5abf 100644 --- a/drivers/staging/media/atomisp/platform/intel-mid/atomisp_gmin_platform.c +++ b/drivers/staging/media/atomisp/platform/intel-mid/atomisp_gmin_platform.c @@ -4,10 +4,10 @@ #include <linux/efi.h> #include <linux/pci.h> #include <linux/acpi.h> +#include <linux/clk.h> #include <linux/delay.h> #include <media/v4l2-subdev.h> #include <linux/mfd/intel_soc_pmic.h> -#include "../../include/linux/vlv2_plat_clock.h" #include <linux/regulator/consumer.h> #include <linux/gpio/consumer.h> #include <linux/gpio.h> @@ -17,11 +17,7 @@ #define MAX_SUBDEVS 8 -/* Should be defined in vlv2_plat_clock API, isn't: */ -#define VLV2_CLK_PLL_19P2MHZ 1 -#define VLV2_CLK_XTAL_19P2MHZ 0 -#define VLV2_CLK_ON 1 -#define VLV2_CLK_OFF 2 +#define VLV2_CLK_PLL_19P2MHZ 1 /* XTAL on CHT */ #define ELDO1_SEL_REG 0x19 #define ELDO1_1P8V 0x16 #define ELDO1_CTRL_SHIFT 0x00 @@ -33,6 +29,7 @@ struct gmin_subdev { struct v4l2_subdev *subdev; int clock_num; int clock_src; + struct clk *pmc_clk; struct gpio_desc *gpio0; struct gpio_desc *gpio1; struct regulator *v1p8_reg; @@ -344,6 +341,9 @@ static int gmin_platform_deinit(void) return 0; } +#define GMIN_PMC_CLK_NAME 14 /* "pmc_plt_clk_[0..5]" */ +static char gmin_pmc_clk_name[GMIN_PMC_CLK_NAME]; + static struct gmin_subdev *gmin_subdev_add(struct v4l2_subdev *subdev) { int i, ret; @@ -377,6 +377,37 @@ static struct gmin_subdev *gmin_subdev_add(struct v4l2_subdev *subdev) gmin_subdevs[i].gpio0 = gpiod_get_index(dev, NULL, 0, GPIOD_OUT_LOW); gmin_subdevs[i].gpio1 = gpiod_get_index(dev, NULL, 1, GPIOD_OUT_LOW); + /* get PMC clock with clock framework */ + snprintf(gmin_pmc_clk_name, + sizeof(gmin_pmc_clk_name), + "%s_%d", "pmc_plt_clk", gmin_subdevs[i].clock_num); + + gmin_subdevs[i].pmc_clk = devm_clk_get(dev, gmin_pmc_clk_name); + if (IS_ERR(gmin_subdevs[i].pmc_clk)) { + ret = PTR_ERR(gmin_subdevs[i].pmc_clk); + + dev_err(dev, + "Failed to get clk from %s : %d\n", + gmin_pmc_clk_name, + ret); + + return NULL; + } + + /* + * The firmware might enable the clock at + * boot (this information may or may not + * be reflected in the enable clock register). + * To change the rate we must disable the clock + * first to cover these cases. Due to common + * clock framework restrictions that do not allow + * to disable a clock that has not been enabled, + * we need to enable the clock first. + */ + ret = clk_prepare_enable(gmin_subdevs[i].pmc_clk); + if (!ret) + clk_disable_unprepare(gmin_subdevs[i].pmc_clk); + if (!IS_ERR(gmin_subdevs[i].gpio0)) { ret = gpiod_direction_output(gmin_subdevs[i].gpio0, 0); if (ret) @@ -539,13 +570,21 @@ static int gmin_flisclk_ctrl(struct v4l2_subdev *subdev, int on) { int ret = 0; struct gmin_subdev *gs = find_gmin_subdev(subdev); + struct i2c_client *client = v4l2_get_subdevdata(subdev); + + if (on) { + ret = clk_set_rate(gs->pmc_clk, gs->clock_src); + + if (ret) + dev_err(&client->dev, "unable to set PMC rate %d\n", + gs->clock_src); - if (on) - ret = vlv2_plat_set_clock_freq(gs->clock_num, gs->clock_src); - if (ret) - return ret; - return vlv2_plat_configure_clock(gs->clock_num, - on ? VLV2_CLK_ON : VLV2_CLK_OFF); + ret = clk_prepare_enable(gs->pmc_clk); + } else { + clk_disable_unprepare(gs->pmc_clk); + } + + return ret; } static int gmin_csi_cfg(struct v4l2_subdev *sd, int flag) |