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authorLinus Walleij <linus.walleij@linaro.org>2016-07-08 01:05:49 +0200
committerLinus Walleij <linus.walleij@linaro.org>2016-07-08 19:37:33 +0200
commit4d0565a19217a714fb908cf56bc5af92a6be936a (patch)
tree206b98261fef14c483f7f1eb966e52fb6e1091a4 /drivers/pinctrl
parent8229bcf887b5891e6afa3cdeee5be89f4f516c86 (diff)
downloadlinux-4d0565a19217a714fb908cf56bc5af92a6be936a.tar.bz2
pinctrl: qcom: establish proper EBI2 pin groups
After some digging around I found documentation (!) of the APQ8060 EBI2 pin groups. It turns out I first need to split the group in two: ebi2cs and ebi2 proper. The chip select pins are kind of orthogonal to the other EBI2 pins since CS1B and CS2B can be muxed over address bits 7 and 6 (don't know why, but they can). This is good to fix up before we add users. Also found what the "holes" in the assignment all the way up to gpio158 was actually for. All mux documentation comes from "Snapdragon(TM) S3 APQ8060-based DragonBoard(TM) GPIO User Guide Rev. E August 10, 2012", published by Bsquare Corporation. As the documentation seems a bit hard to come by I put some comments in the group definitions so that it is clear to all readers what is going on here and what the lines are used for. Cc: Björn Andersson <bjorn.andersson@linaro.org> Cc: Stephen Boyd <sboyd@codeaurora.org> Reviewed-by: Andy Gross <andy.gross@linaro.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/pinctrl')
-rw-r--r--drivers/pinctrl/qcom/pinctrl-msm8660.c68
1 files changed, 46 insertions, 22 deletions
diff --git a/drivers/pinctrl/qcom/pinctrl-msm8660.c b/drivers/pinctrl/qcom/pinctrl-msm8660.c
index 98eb0e33df84..5591d093bf78 100644
--- a/drivers/pinctrl/qcom/pinctrl-msm8660.c
+++ b/drivers/pinctrl/qcom/pinctrl-msm8660.c
@@ -506,6 +506,7 @@ enum msm8660_functions {
MSM_MUX_usb_fs2_oe_n,
MSM_MUX_vfe,
MSM_MUX_vsens_alarm,
+ MSM_MUX_ebi2cs,
MSM_MUX_ebi2,
MSM_MUX__,
};
@@ -697,13 +698,35 @@ static const char * const vfe_groups[] = {
static const char * const vsens_alarm_groups[] = {
"gpio127"
};
+static const char * const ebi2cs_groups[] = {
+ "gpio39", /* CS1A */
+ "gpio40", /* CS2A */
+ "gpio123", /* CS1B */
+ "gpio124", /* CS2B */
+ "gpio131", /* CS5 */
+ "gpio132", /* CS4 */
+ "gpio133", /* CS3 */
+ "gpio134", /* CS0 */
+};
static const char * const ebi2_groups[] = {
- "gpio39", "gpio40", "gpio123", "gpio124", "gpio125", "gpio126",
- "gpio127", "gpio128", "gpio129", "gpio130", "gpio132", "gpio133",
- "gpio134", "gpio135", "gpio136", "gpio137", "gpio138", "gpio139",
- "gpio140", "gpio141", "gpio142", "gpio143", "gpio144", "gpio145",
- "gpio146", "gpio147", "gpio148", "gpio149", "gpio150", "gpio151",
- "gpio153", "gpio157"
+ /* ADDR9 & ADDR8 */
+ "gpio37", "gpio38",
+ /* ADDR7 - ADDR 0 */
+ "gpio123", "gpio124", "gpio125", "gpio126",
+ "gpio127", "gpio128", "gpio129", "gpio130",
+ /* (muxed address+data) AD15 - AD0 */
+ "gpio135", "gpio136", "gpio137", "gpio138", "gpio139",
+ "gpio140", "gpio141", "gpio142", "gpio143", "gpio144",
+ "gpio145", "gpio146", "gpio147", "gpio148", "gpio149",
+ "gpio150",
+ "gpio151", /* OE output enable */
+ "gpio152", /* clock */
+ "gpio153", /* ADV */
+ "gpio154", /* WAIT (input) */
+ "gpio155", /* UB Upper Byte Enable */
+ "gpio156", /* LB Lower Byte Enable */
+ "gpio157", /* WE Write Enable */
+ "gpio158", /* busy */
};
static const struct msm_function msm8660_functions[] = {
@@ -758,7 +781,8 @@ static const struct msm_function msm8660_functions[] = {
FUNCTION(usb_fs2_oe_n),
FUNCTION(vfe),
FUNCTION(vsens_alarm),
- FUNCTION(ebi2),
+ FUNCTION(ebi2cs), /* for EBI2 chip selects */
+ FUNCTION(ebi2), /* for general EBI2 pins */
};
static const struct msm_pingroup msm8660_groups[] = {
@@ -799,10 +823,10 @@ static const struct msm_pingroup msm8660_groups[] = {
PINGROUP(34, gsbi1, _, _, _, _, _, _),
PINGROUP(35, gsbi1, _, _, _, _, _, _),
PINGROUP(36, gsbi1, _, _, _, _, _, _),
- PINGROUP(37, gsbi2, _, _, _, _, _, _),
- PINGROUP(38, gsbi2, _, _, _, _, _, _),
- PINGROUP(39, gsbi2, ebi2, mdp_vsync, _, _, _, _),
- PINGROUP(40, gsbi2, ebi2, _, _, _, _, _),
+ PINGROUP(37, gsbi2, ebi2, _, _, _, _, _),
+ PINGROUP(38, gsbi2, ebi2, _, _, _, _, _),
+ PINGROUP(39, gsbi2, ebi2cs, mdp_vsync, _, _, _, _),
+ PINGROUP(40, gsbi2, ebi2cs, _, _, _, _, _),
PINGROUP(41, gsbi3, mdp_vsync, _, _, _, _, _),
PINGROUP(42, gsbi3, vfe, _, _, _, _, _),
PINGROUP(43, gsbi3, _, _, _, _, _, _),
@@ -885,18 +909,18 @@ static const struct msm_pingroup msm8660_groups[] = {
PINGROUP(120, i2s, _, _, _, _, _, _),
PINGROUP(121, i2s, _, _, _, _, _, _),
PINGROUP(122, i2s, gp_clk_1b, _, _, _, _, _),
- PINGROUP(123, ebi2, gsbi2_spi_cs1_n, _, _, _, _, _),
- PINGROUP(124, ebi2, gsbi2_spi_cs2_n, _, _, _, _, _),
+ PINGROUP(123, ebi2, gsbi2_spi_cs1_n, ebi2cs, _, _, _, _),
+ PINGROUP(124, ebi2, gsbi2_spi_cs2_n, ebi2cs, _, _, _, _),
PINGROUP(125, ebi2, gsbi2_spi_cs3_n, _, _, _, _, _),
PINGROUP(126, ebi2, _, _, _, _, _, _),
PINGROUP(127, ebi2, vsens_alarm, _, _, _, _, _),
PINGROUP(128, ebi2, _, _, _, _, _, _),
PINGROUP(129, ebi2, _, _, _, _, _, _),
PINGROUP(130, ebi2, _, _, _, _, _, _),
- PINGROUP(131, _, _, _, _, _, _, _),
- PINGROUP(132, ebi2, _, _, _, _, _, _),
- PINGROUP(133, ebi2, _, _, _, _, _, _),
- PINGROUP(134, ebi2, _, _, _, _, _, _),
+ PINGROUP(131, ebi2cs, _, _, _, _, _, _),
+ PINGROUP(132, ebi2cs, _, _, _, _, _, _),
+ PINGROUP(133, ebi2cs, _, _, _, _, _, _),
+ PINGROUP(134, ebi2cs, _, _, _, _, _, _),
PINGROUP(135, ebi2, _, _, _, _, _, _),
PINGROUP(136, ebi2, _, _, _, _, _, _),
PINGROUP(137, ebi2, _, _, _, _, _, _),
@@ -914,13 +938,13 @@ static const struct msm_pingroup msm8660_groups[] = {
PINGROUP(149, ebi2, sdc2, _, _, _, _, _),
PINGROUP(150, ebi2, sdc2, _, _, _, _, _),
PINGROUP(151, ebi2, sdc2, _, _, _, _, _),
- PINGROUP(152, _, sdc2, _, _, _, _, _),
+ PINGROUP(152, ebi2, sdc2, _, _, _, _, _),
PINGROUP(153, ebi2, _, _, _, _, _, _),
- PINGROUP(154, _, _, _, _, _, _, _),
- PINGROUP(155, _, _, _, _, _, _, _),
- PINGROUP(156, _, _, _, _, _, _, _),
+ PINGROUP(154, ebi2, _, _, _, _, _, _),
+ PINGROUP(155, ebi2, _, _, _, _, _, _),
+ PINGROUP(156, ebi2, _, _, _, _, _, _),
PINGROUP(157, ebi2, _, _, _, _, _, _),
- PINGROUP(158, _, _, _, _, _, _, _),
+ PINGROUP(158, ebi2, _, _, _, _, _, _),
PINGROUP(159, sdc1, _, _, _, _, _, _),
PINGROUP(160, sdc1, _, _, _, _, _, _),
PINGROUP(161, sdc1, _, _, _, _, _, _),