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authorGregory Bean <gbean@codeaurora.org>2010-08-28 13:05:44 -0400
committerDaniel Walker <dwalker@codeaurora.org>2010-10-06 12:01:15 -0400
commit1963a2afc81afe6d85e7a12538b74a9919d958ae (patch)
treef1486399cfce632819509cb86639d3106d539805 /arch/arm/mach-msm/Kconfig
parent846afbd1fe015e082c89d56dd42c484d896ef58e (diff)
msm: add gpiomux api for gpio multiplex & configuration.
Add the 'gpiomux' api, which addresses the following shortcomings of existing tlmm api: - gpio power-collapse, which is managed by a peripheral processor on other targets, must be managed by the application processor on the 8x60. - The enable/disable flag of the legacy gpio_tlmm_config api is not applicable on the 8x60, and causes confusion. - The gpio 'direction' bits are meaningless for all func_sel configurations except for generic-gpio mode (func_sel 0), in which case the gpio_direction_* functions should be used. Having these bits in the tlmm api leads to confusion and misuse of the gpiolib api, and they have been removed in gpiomux. - The functional api of the legacy system ran contrary to the typical use-case, which is a single massive configuration at boot. Rather than forcing hundreds of 'config' function calls, the new api allows data to be configured with a single table. gpiomux_get and gpiomux_put are meant to be called automatically when gpio_request and gpio_free are called, giving automatic gpiomux/tlmm control to those drivers/lines with simple power profiles - in the simplest cases, an entry in the gpiomux table and the correct usage of gpiolib is all that is required to get proper gpio power control. Signed-off-by: Gregory Bean <gbean@codeaurora.org> Signed-off-by: Daniel Walker <dwalker@codeaurora.org>
Diffstat (limited to 'arch/arm/mach-msm/Kconfig')
-rw-r--r--arch/arm/mach-msm/Kconfig2
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/arm/mach-msm/Kconfig b/arch/arm/mach-msm/Kconfig
index 47264a76eeb3..4e79580af628 100644
--- a/arch/arm/mach-msm/Kconfig
+++ b/arch/arm/mach-msm/Kconfig
@@ -106,4 +106,6 @@ config MSM_SMD_PKG3
106config MSM_SMD 106config MSM_SMD
107 bool 107 bool
108 108
109config MSM_V2_TLMM
110 bool
109endif 111endif