[PATCH 4/4] pinctrl: qcom: Add support for reset for apq8064

Pramod Gurav
2014-08-28T14:55:30Z

This patch adds support for reset functions to reboot the boards
with soc apq8064.

CC: Linus Walleij <linus.walleij@linaro.org>
CC: Bjorn Andersson <bjorn.andersson@sonymobile.com>
CC: "Ivan T. Ivanov" <iivanov@mm-sol.com>
CC: Stephen Boyd <sboyd@codeaurora.org>
CC: Andy Gross <agross@codeaurora.org>
Signed-off-by: Pramod Gurav <pramod.gurav@smartplayin.com>
---
drivers/pinctrl/qcom/pinctrl-apq8064.c | 7 +++++-
drivers/pinctrl/qcom/pinctrl-msm.c | 38 ++++++++++++++++++++++++++++++++
2 files changed, 44 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..be43e7a 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 +898,17 @@ 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;
+ }
+#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