diff mbox

[1/2] pinctrl: qcom: Clear all function selection bits

Message ID 20160626052132.7178-2-stephen.boyd@linaro.org (mailing list archive)
State New, archived
Headers show

Commit Message

Stephen Boyd June 26, 2016, 5:21 a.m. UTC 
The function selection bitfield is not always 3 bits wide.
Sometimes it is 4 bits wide. Let's use the npins struct member to
determine how many bits wide the function selection bitfield is
so we clear the correct amount of bits in the register while
remuxing the pins.

Cc: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Stephen Boyd <stephen.boyd@linaro.org>
---
 drivers/pinctrl/qcom/pinctrl-msm.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

Comments

Linus Walleij June 29, 2016, 8:14 a.m. UTC | #1 
On Sun, Jun 26, 2016 at 7:21 AM, Stephen Boyd <stephen.boyd@linaro.org> wrote:

> The function selection bitfield is not always 3 bits wide.
> Sometimes it is 4 bits wide. Let's use the npins struct member to
> determine how many bits wide the function selection bitfield is
> so we clear the correct amount of bits in the register while
> remuxing the pins.
>
> Cc: Bjorn Andersson <bjorn.andersson@linaro.org>
> Signed-off-by: Stephen Boyd <stephen.boyd@linaro.org>

Patch applied.

Yours,
Linus Walleij
diff mbox

Patch

diff --git a/drivers/pinctrl/qcom/pinctrl-msm.c b/drivers/pinctrl/qcom/pinctrl-msm.c
index 1a44e1d03390..51c42d746883 100644
--- a/drivers/pinctrl/qcom/pinctrl-msm.c
+++ b/drivers/pinctrl/qcom/pinctrl-msm.c
@@ -29,6 +29,7 @@ 
 #include <linux/spinlock.h>
 #include <linux/reboot.h>
 #include <linux/pm.h>
+#include <linux/log2.h>
 
 #include "../core.h"
 #include "../pinconf.h"
@@ -138,10 +139,11 @@  static int msm_pinmux_set_mux(struct pinctrl_dev *pctldev,
 	struct msm_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
 	const struct msm_pingroup *g;
 	unsigned long flags;
-	u32 val;
+	u32 val, mask;
 	int i;
 
 	g = &pctrl->soc->groups[group];
+	mask = GENMASK(g->mux_bit + order_base_2(g->nfuncs) - 1, g->mux_bit);
 
 	for (i = 0; i < g->nfuncs; i++) {
 		if (g->funcs[i] == function)
@@ -154,7 +156,7 @@  static int msm_pinmux_set_mux(struct pinctrl_dev *pctldev,
 	spin_lock_irqsave(&pctrl->lock, flags);
 
 	val = readl(pctrl->regs + g->ctl_reg);
-	val &= ~(0x7 << g->mux_bit);
+	val &= mask;
 	val |= i << g->mux_bit;
 	writel(val, pctrl->regs + g->ctl_reg);