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authorGregory Bean <gbean@codeaurora.org>2010-04-30 22:15:16 -0700
committerDaniel Walker <dwalker@codeaurora.org>2010-05-13 16:08:22 -0700
commit1de238e0eb5181bdeb842d7ea8edebd52c2a9c3a (patch)
tree4ed754a2c0c7624be1cbcd0fb811fa2bffa5d213 /arch/arm/mach-msm/gpio.c
parent5e96da5d5074eae3b94d4abadfc114febb6e2a51 (diff)
msm: add tlmm support for gpio.
GPIO support for Qualcomm SOCs requires interaction with the radio (baseband processor). This API allows the different boards to enable GPIO through the radio processor in a generic way. Signed-off-by: Gregory Bean <gbean@codeaurora.org> Signed-off-by: David Brown <davidb@codeaurora.org> Signed-off-by: Daniel Walker <dwalker@codeaurora.org> Signed-off-by: Abhijeet Dharmapurikar <adharmap@codeaurora.org> Signed-off-by: Stepan Moskovchenko <stepanm@codeaurora.org>
Diffstat (limited to 'arch/arm/mach-msm/gpio.c')
-rw-r--r--arch/arm/mach-msm/gpio.c85
1 files changed, 85 insertions, 0 deletions
diff --git a/arch/arm/mach-msm/gpio.c b/arch/arm/mach-msm/gpio.c
new file mode 100644
index 00000000000..bc32c845c7b
--- /dev/null
+++ b/arch/arm/mach-msm/gpio.c
@@ -0,0 +1,85 @@
+/* linux/arch/arm/mach-msm/gpio.c
+ *
+ * Copyright (C) 2007 Google, Inc.
+ * Copyright (c) 2009, Code Aurora Forum. All rights reserved.
+ *
+ * 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/module.h>
+#include <mach/gpio.h>
+#include "proc_comm.h"
+
+int gpio_tlmm_config(unsigned config, unsigned disable)
+{
+ return msm_proc_comm(PCOM_RPC_GPIO_TLMM_CONFIG_EX, &config, &disable);
+}
+EXPORT_SYMBOL(gpio_tlmm_config);
+
+int msm_gpios_enable(const struct msm_gpio *table, int size)
+{
+ int rc;
+ int i;
+ const struct msm_gpio *g;
+ for (i = 0; i < size; i++) {
+ g = table + i;
+ rc = gpio_tlmm_config(g->gpio_cfg, GPIO_ENABLE);
+ if (rc) {
+ pr_err("gpio_tlmm_config(0x%08x, GPIO_ENABLE)"
+ " <%s> failed: %d\n",
+ g->gpio_cfg, g->label ?: "?", rc);
+ pr_err("pin %d func %d dir %d pull %d drvstr %d\n",
+ GPIO_PIN(g->gpio_cfg), GPIO_FUNC(g->gpio_cfg),
+ GPIO_DIR(g->gpio_cfg), GPIO_PULL(g->gpio_cfg),
+ GPIO_DRVSTR(g->gpio_cfg));
+ goto err;
+ }
+ }
+ return 0;
+err:
+ msm_gpios_disable(table, i);
+ return rc;
+}
+EXPORT_SYMBOL(msm_gpios_enable);
+
+void msm_gpios_disable(const struct msm_gpio *table, int size)
+{
+ int rc;
+ int i;
+ const struct msm_gpio *g;
+ for (i = size-1; i >= 0; i--) {
+ g = table + i;
+ rc = gpio_tlmm_config(g->gpio_cfg, GPIO_DISABLE);
+ if (rc) {
+ pr_err("gpio_tlmm_config(0x%08x, GPIO_DISABLE)"
+ " <%s> failed: %d\n",
+ g->gpio_cfg, g->label ?: "?", rc);
+ pr_err("pin %d func %d dir %d pull %d drvstr %d\n",
+ GPIO_PIN(g->gpio_cfg), GPIO_FUNC(g->gpio_cfg),
+ GPIO_DIR(g->gpio_cfg), GPIO_PULL(g->gpio_cfg),
+ GPIO_DRVSTR(g->gpio_cfg));
+ }
+ }
+}
+EXPORT_SYMBOL(msm_gpios_disable);
+
+int msm_gpios_request_enable(const struct msm_gpio *table, int size)
+{
+ int rc = msm_gpios_enable(table, size);
+ return rc;
+}
+EXPORT_SYMBOL(msm_gpios_request_enable);
+
+void msm_gpios_disable_free(const struct msm_gpio *table, int size)
+{
+ msm_gpios_disable(table, size);
+}
+EXPORT_SYMBOL(msm_gpios_disable_free);