Commit a7e2ca17 authored by Luciano Coelho's avatar Luciano Coelho Committed by Greg Kroah-Hartman
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Revert "drivers/misc/ti-st: remove gpio handling"

This reverts commit eccf2979


The reason is that it broke TI WiLink shared transport on Panda.
Also, callback functions should not be added to board files anymore,
so revert to implementing the power functions in the driver itself.

Additionally, changed a variable name ('status' to 'err') so that this
revert compiles properly.

Cc: stable <> [3.7]
Acked-by: default avatarTony Lindgren <>
Signed-off-by: default avatarLuciano Coelho <>
Signed-off-by: default avatarGreg Kroah-Hartman <>
parent 9a928415
......@@ -468,6 +468,11 @@ long st_kim_start(void *kim_data)
if (pdata->chip_enable)
/* Configure BT nShutdown to HIGH state */
gpio_set_value(kim_gdata->nshutdown, GPIO_LOW);
mdelay(5); /* FIXME: a proper toggle */
gpio_set_value(kim_gdata->nshutdown, GPIO_HIGH);
/* re-initialize the completion */
/* send notification to UIM */
......@@ -509,7 +514,8 @@ long st_kim_start(void *kim_data)
* (b) upon failure to either install ldisc or download firmware.
* The function is responsible to (a) notify UIM about un-installation,
* (b) flush UART if the ldisc was installed.
* (c) invoke platform's chip disabling routine.
* (c) reset BT_EN - pull down nshutdown at the end.
* (d) invoke platform's chip disabling routine.
long st_kim_stop(void *kim_data)
......@@ -541,6 +547,13 @@ long st_kim_stop(void *kim_data)
/* By default configure BT nShutdown to LOW state */
gpio_set_value(kim_gdata->nshutdown, GPIO_LOW);
gpio_set_value(kim_gdata->nshutdown, GPIO_HIGH);
gpio_set_value(kim_gdata->nshutdown, GPIO_LOW);
/* platform specific disable */
if (pdata->chip_disable)
......@@ -733,6 +746,20 @@ static int kim_probe(struct platform_device *pdev)
/* refer to itself */
kim_gdata->core_data->kim_data = kim_gdata;
/* Claim the chip enable nShutdown gpio from the system */
kim_gdata->nshutdown = pdata->nshutdown_gpio;
err = gpio_request(kim_gdata->nshutdown, "kim");
if (unlikely(err)) {
pr_err(" gpio %ld request failed ", kim_gdata->nshutdown);
return err;
/* Configure nShutdown GPIO as output=0 */
err = gpio_direction_output(kim_gdata->nshutdown, 0);
if (unlikely(err)) {
pr_err(" unable to configure gpio %ld", kim_gdata->nshutdown);
return err;
/* get reference of pdev for request_firmware
kim_gdata->kim_pdev = pdev;
......@@ -779,10 +806,18 @@ static int kim_probe(struct platform_device *pdev)
static int kim_remove(struct platform_device *pdev)
/* free the GPIOs requested */
struct ti_st_plat_data *pdata = pdev->dev.platform_data;
struct kim_data_s *kim_gdata;
kim_gdata = dev_get_drvdata(&pdev->dev);
/* Free the Bluetooth/FM/GPIO
* nShutdown gpio from the system
pr_info("nshutdown GPIO Freed");
sysfs_remove_group(&pdev->dev.kobj, &uim_attr_grp);
pr_info("sysfs entries removed");
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