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Message-Id: <53BA5DC2-68CB-4B61-A090-E8415EEBCF44@codeaurora.org>
Date: Wed, 27 Aug 2014 08:39:32 -0500
From: Kumar Gala <galak@...eaurora.org>
To: Pramod Gurav <pramod.gurav@...rtplayin.com>
Cc: linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
Linus Walleij <linus.walleij@...aro.org>,
Bjorn Andersson <bjorn.andersson@...ymobile.com>,
"Ivan T. Ivanov" <iivanov@...sol.com>,
Stephen Boyd <sboyd@...eaurora.org>,
Andy Gross <agross@...eaurora.org>
Subject: Re: [PATCH 2/2] pinctrl: qcom: Add support for reset for apq8064
On Aug 26, 2014, at 1:31 PM, Pramod Gurav <pramod.gurav@...rtplayin.com> wrote:
> This patch adds support for reset functions to reboot the boards
> with soc apq8064.
>
> CC: Linus Walleij <linus.walleij@...aro.org>
> CC: Bjorn Andersson <bjorn.andersson@...ymobile.com>
> CC: "Ivan T. Ivanov" <iivanov@...sol.com>
> CC: Stephen Boyd <sboyd@...eaurora.org>
> CC: Andy Gross <agross@...eaurora.org>
> Signed-off-by: Pramod Gurav <pramod.gurav@...rtplayin.com>
> ---
> drivers/pinctrl/qcom/pinctrl-apq8064.c | 7 +++++-
> drivers/pinctrl/qcom/pinctrl-msm.c | 36 ++++++++++++++++++++++++++++++++
> 2 files changed, 42 insertions(+), 1 deletions(-)
>
> diff --git a/drivers/pinctrl/qcom/pinctrl-apq8064.c b/drivers/pinctrl/qcom/pinctrl-apq8064.c
> index feb6f15..ef1263c 100644
> --- a/drivers/pinctrl/qcom/pinctrl-apq8064.c
> +++ b/drivers/pinctrl/qcom/pinctrl-apq8064.c
> @@ -324,6 +324,7 @@ enum apq8064_functions {
> APQ_MUX_tsif1,
> APQ_MUX_tsif2,
> APQ_MUX_usb2_hsic,
> + APQ_MUX_ps_hold,
> APQ_MUX_NA,
> };
>
> @@ -351,6 +352,9 @@ static const char * const gpio_groups[] = {
> "gpio78", "gpio79", "gpio80", "gpio81", "gpio82", "gpio83", "gpio84",
> "gpio85", "gpio86", "gpio87", "gpio88", "gpio89"
> };
> +static const char * const ps_hold_groups[] = {
> + "gpio78"
> +};
> static const char * const gsbi1_groups[] = {
> "gpio18", "gpio19", "gpio20", "gpio21"
> };
> @@ -477,6 +481,7 @@ static const struct msm_function apq8064_functions[] = {
> FUNCTION(tsif1),
> FUNCTION(tsif2),
> FUNCTION(usb2_hsic),
> + FUNCTION(ps_hold),
> };
>
> static const struct msm_pingroup apq8064_groups[] = {
> @@ -558,7 +563,7 @@ static const struct msm_pingroup apq8064_groups[] = {
> PINGROUP(75, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA),
> PINGROUP(76, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA),
> PINGROUP(77, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA),
> - PINGROUP(78, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA),
> + PINGROUP(78, ps_hold, NA, NA, NA, NA, NA, NA, NA, NA, NA),
> PINGROUP(79, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA),
> PINGROUP(80, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA),
> PINGROUP(81, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA),
> diff --git a/drivers/pinctrl/qcom/pinctrl-msm.c b/drivers/pinctrl/qcom/pinctrl-msm.c
> index 2738108..f4e4f8f 100644
> --- a/drivers/pinctrl/qcom/pinctrl-msm.c
> +++ b/drivers/pinctrl/qcom/pinctrl-msm.c
> @@ -12,6 +12,7 @@
> * GNU General Public License for more details.
> */
>
> +#include <linux/delay.h>
> #include <linux/err.h>
> #include <linux/io.h>
> #include <linux/module.h>
> @@ -27,12 +28,17 @@
> #include <linux/interrupt.h>
> #include <linux/spinlock.h>
>
> +#include <asm/system_misc.h>
> +
> #include "../core.h"
> #include "../pinconf.h"
> #include "pinctrl-msm.h"
> #include "../pinctrl-utils.h"
>
> #define MAX_NR_GPIO 300
> +#define PS_HOLD_OFFSET 0x820
> +
> +static void __iomem *msm_ps_hold;
>
> /**
> * struct msm_pinctrl - state for a pinctrl-msm device
> @@ -848,10 +854,31 @@ static int msm_gpio_init(struct msm_pinctrl *pctrl)
> return 0;
> }
>
> +static void qcom_reset(enum reboot_mode reboot_mode, const char *cmd)
> +{
> + writel(0, msm_ps_hold);
> + mdelay(10000);
> +}
> +
> +const struct msm_function
> +*find_pshold_function(const struct msm_function *functions,
> + unsigned nfunctions, const char *name)
> +{
> + int i = 0;
> + const struct msm_function *func;
> +
> + for (func = functions; i <= nfunctions; func++, i++)
> + if (!strcmp(func->name, name))
> + return func;
> +
> + return NULL;
> +}
> +
> int msm_pinctrl_probe(struct platform_device *pdev,
> const struct msm_pinctrl_soc_data *soc_data)
> {
> struct msm_pinctrl *pctrl;
> + const struct msm_function *func;
> struct resource *res;
> int ret;
>
> @@ -871,6 +898,15 @@ int msm_pinctrl_probe(struct platform_device *pdev,
> if (IS_ERR(pctrl->regs))
> return PTR_ERR(pctrl->regs);
>
> +#ifdef CONFIG_ARM
> + func = find_pshold_function(soc_data->functions,
> + soc_data->nfunctions, "ps_hold");
> + if (func) {
> + dev_dbg(&pdev->dev, "Found Function %s\n", func->name);
> + msm_ps_hold = pctrl->regs + PS_HOLD_OFFSET;
> + arm_pm_restart = qcom_reset;
> + }
If we keep this we probably should add something like:
#else
#error “not supported on this arch"
> +#endif
> pctrl->irq = platform_get_irq(pdev, 0);
> if (pctrl->irq < 0) {
> dev_err(&pdev->dev, "No interrupt defined for msmgpio\n");
> --
> 1.7.0.4
>
> --
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