On Wed, Jun 27, 2012 at 10:05:11PM +0400, Konstantin Baydarov wrote:
> omap4: thermal: add basic CPU thermal zone
>
> This patch exposes OMAP4 thermal sensor as a thermal zone
> named "cpu". Only thermal creation is done here.
>
> TODO:
>
> - Add cooling bindings
> - Add extrapolation rules
>
> Signed-off-by: Eduardo Valentin <eduardo.valentin@xxxxxx>
You change the authorship and don't sign?
Anyway, this one has a lot to evolve still. I will send to you an improved version
of the BG driver.
> ---
> drivers/thermal/Kconfig | 12 ++++++
> drivers/thermal/Makefile | 1 +
> drivers/thermal/omap-bandgap.c | 1 +
> drivers/thermal/omap-bandgap.h | 12 ++++++
> drivers/thermal/omap4-thermal.c | 72 +++++++++++++++++++++++++++++++++++++++
> 5 files changed, 98 insertions(+), 0 deletions(-)
> create mode 100644 drivers/thermal/omap4-thermal.c
>
> diff --git a/drivers/thermal/Kconfig b/drivers/thermal/Kconfig
> index f9989e8..7d44b5c 100644
> --- a/drivers/thermal/Kconfig
> +++ b/drivers/thermal/Kconfig
> @@ -38,3 +38,15 @@ config OMAP_BANDGAP
> This includes alert interrupts generation and also the TSHUT
> support.
>
> +config OMAP4_THERMAL
> + bool "Texas Instruments OMAP4 thermal support"
> + depends on OMAP_BANDGAP
> + depends on ARCH_OMAP4
> + help
> + If you say yes here you get thermal support for the Texas Instruments
> + OMAP4 SoC family. The current chip supported are:
> + - OMAP4460
> +
> + This includes alert interrupts generation and also the TSHUT
> + support.
> +
> diff --git a/drivers/thermal/Makefile b/drivers/thermal/Makefile
> index 5ff1af1..6397678 100644
> --- a/drivers/thermal/Makefile
> +++ b/drivers/thermal/Makefile
> @@ -6,3 +6,4 @@ obj-$(CONFIG_THERMAL) += thermal_sys.o
> obj-$(CONFIG_SPEAR_THERMAL) += spear_thermal.o
> obj-$(CONFIG_OMAP_BANDGAP) += omap-thermal.o
> omap-thermal-y := omap-bandgap.o
> +omap-thermal-$(CONFIG_OMAP4_THERMAL) += omap4-thermal.o
> diff --git a/drivers/thermal/omap-bandgap.c b/drivers/thermal/omap-bandgap.c
> index c68fa1a..c80d879 100644
> --- a/drivers/thermal/omap-bandgap.c
> +++ b/drivers/thermal/omap-bandgap.c
> @@ -1328,6 +1328,7 @@ static const struct omap_bandgap_data omap4460_data = {
> .fclock_name = "bandgap_ts_fclk",
> .div_ck_name = "div_ts_ck",
> .conv_table = omap4460_adc_to_temp,
> + .expose_sensor = omap4_thermal_expose_sensor,
> .irq = 126,
> .sensors = {
> {
> diff --git a/drivers/thermal/omap-bandgap.h b/drivers/thermal/omap-bandgap.h
> index 41f25ff..3f4c192 100644
> --- a/drivers/thermal/omap-bandgap.h
> +++ b/drivers/thermal/omap-bandgap.h
> @@ -61,4 +61,16 @@ int omap_bandgap_write_update_interval(struct omap_bandgap *bg_ptr, int id,
> int omap_bandgap_read_temperature(struct omap_bandgap *bg_ptr, int id,
> int *temperature);
>
> +#ifdef CONFIG_OMAP4_THERMAL
> +int omap4_thermal_expose_sensor(struct omap_bandgap *bg_ptr, int id,
> + char *domain);
> +#else
> +static inline int omap4_thermal_expose_sensor(struct omap_bandgap *bg_ptr,
> + int id, char *domain)
> +{
> + return 0;
> +}
> +
> +#endif
> +
> #endif
> diff --git a/drivers/thermal/omap4-thermal.c b/drivers/thermal/omap4-thermal.c
> new file mode 100644
> index 0000000..fb11753
> --- /dev/null
> +++ b/drivers/thermal/omap4-thermal.c
> @@ -0,0 +1,72 @@
> +/*
> + * SPEAr thermal driver.
> + *
> + * Copyright (C) 2011-2012 Texas Instruments Inc.
> + * Contact:
> + * Eduardo Valentin <eduardo.valentin@xxxxxx>
> + *
> + * This software is licensed under the terms of the GNU General Public
> + * License version 2, as published by the Free Software Foundation, and
> + * may be copied, distributed, and modified under those terms.
> + *
> + * 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/io.h>
> +#include <linux/kernel.h>
> +#include <linux/module.h>
> +#include <linux/thermal.h>
> +
> +#include "omap-bandgap.h"
> +
> +struct omap4_thermal_data {
> + struct thermal_zone_device *omap4_thermal;
> + struct omap_bandgap *bg_ptr;
> + int sensor_id;
> +};
> +
> +static inline int omap4_thermal_get_temp(struct thermal_zone_device *thermal,
> + unsigned long *temp)
> +{
> + struct omap4_thermal_data *data = thermal->devdata;
> + int ret, tmp;
> +
> + ret = omap_bandgap_read_temperature(data->bg_ptr, data->sensor_id,
> + &tmp);
> + if (!ret)
> + *temp = tmp;
> +
> + return ret;
> +}
> +
> +static struct thermal_zone_device_ops omap4_thermal_ops = {
> + .get_temp = omap4_thermal_get_temp,
> +};
> +
> +int omap4_thermal_expose_sensor(struct omap_bandgap *bg_ptr, int id,
> + char *domain)
> +{
> + struct omap4_thermal_data *data;
> +
> + data = devm_kzalloc(bg_ptr->dev, sizeof(*data), GFP_KERNEL);
> + if (!data) {
> + dev_err(bg_ptr->dev, "kzalloc fail\n");
> + return -ENOMEM;
> + }
> + data->sensor_id = id;
> + data->bg_ptr = bg_ptr;
> + data->omap4_thermal = thermal_zone_device_register(domain, 0,
> + data, &omap4_thermal_ops, 0, 0, 0, 0);
> + if (IS_ERR(data->omap4_thermal)) {
> + dev_err(bg_ptr->dev, "thermal zone device is NULL\n");
> + return PTR_ERR(data->omap4_thermal);
> + }
> +
> + return 0;
> +}
> --
> 1.7.7.6
>
>
