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From e34d9fdac8182f6ce8933501fea6e84664060bf0 Mon Sep 17 00:00:00 2001
From: Stephen Boyd <sboyd@codeaurora.org>
Date: Thu, 6 Mar 2014 22:44:44 -0800
Subject: [PATCH 030/182] pinctrl: msm: Replace lookup tables with math
We don't need to waste space with these lookup tables, just do
the math directly.
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Acked-by: Bjorn Andersson <bjorn.andersson@sonymobile.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
drivers/pinctrl/pinctrl-msm.c | 14 ++++++++------
1 file changed, 8 insertions(+), 6 deletions(-)
--- a/drivers/pinctrl/pinctrl-msm.c
+++ b/drivers/pinctrl/pinctrl-msm.c
@@ -258,8 +258,10 @@ static int msm_config_set(struct pinctrl
#define MSM_PULL_DOWN 1
#define MSM_PULL_UP 3
-static const unsigned msm_regval_to_drive[] = { 2, 4, 6, 8, 10, 12, 14, 16 };
-static const unsigned msm_drive_to_regval[] = { -1, -1, 0, -1, 1, -1, 2, -1, 3, -1, 4, -1, 5, -1, 6, -1, 7 };
+static unsigned msm_regval_to_drive(u32 val)
+{
+ return (val + 1) * 2;
+}
static int msm_config_group_get(struct pinctrl_dev *pctldev,
unsigned int group,
@@ -296,7 +298,7 @@ static int msm_config_group_get(struct p
arg = arg == MSM_PULL_UP;
break;
case PIN_CONFIG_DRIVE_STRENGTH:
- arg = msm_regval_to_drive[arg];
+ arg = msm_regval_to_drive(arg);
break;
default:
dev_err(pctrl->dev, "Unsupported config parameter: %x\n",
@@ -349,10 +351,10 @@ static int msm_config_group_set(struct p
break;
case PIN_CONFIG_DRIVE_STRENGTH:
/* Check for invalid values */
- if (arg >= ARRAY_SIZE(msm_drive_to_regval))
+ if (arg > 16 || arg < 2 || (arg % 2) != 0)
arg = -1;
else
- arg = msm_drive_to_regval[arg];
+ arg = (arg / 2) - 1;
break;
default:
dev_err(pctrl->dev, "Unsupported config parameter: %x\n",
@@ -531,7 +533,7 @@ static void msm_gpio_dbg_show_one(struct
pull = (ctl_reg >> g->pull_bit) & 3;
seq_printf(s, " %-8s: %-3s %d", g->name, is_out ? "out" : "in", func);
- seq_printf(s, " %dmA", msm_regval_to_drive[drive]);
+ seq_printf(s, " %dmA", msm_regval_to_drive(drive));
seq_printf(s, " %s", pulls[pull]);
}
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