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Message-ID: <20250817215316.1872689-2-dmitry.torokhov@gmail.com>
Date: Sun, 17 Aug 2025 14:53:14 -0700
From: Dmitry Torokhov <dmitry.torokhov@...il.com>
To: linux-input@...r.kernel.org
Cc: linux-kernel@...r.kernel.org,
Arnd Bergmann <arnd@...db.de>,
Eric Miao <eric.y.miao@...il.com>
Subject: [PATCH 2/3] Input: pxa27x-keypad - use BIT, GENMASK, FIELD_GET, etc
Instead of using explicit binary values for masks and shifts to do bit
operations use appropriate macros.
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@...il.com>
---
drivers/input/keyboard/pxa27x_keypad.c | 128 +++++++++++++------------
1 file changed, 69 insertions(+), 59 deletions(-)
diff --git a/drivers/input/keyboard/pxa27x_keypad.c b/drivers/input/keyboard/pxa27x_keypad.c
index 995e4e227581..376e943dc3dd 100644
--- a/drivers/input/keyboard/pxa27x_keypad.c
+++ b/drivers/input/keyboard/pxa27x_keypad.c
@@ -12,7 +12,8 @@
* on some suggestions by Nicolas Pitre <nico@...xnic.net>.
*/
-
+#include <linux/bits.h>
+#include <linux/bitfield.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/interrupt.h>
@@ -30,62 +31,71 @@
/*
* Keypad Controller registers
*/
-#define KPC 0x0000 /* Keypad Control register */
-#define KPDK 0x0008 /* Keypad Direct Key register */
-#define KPREC 0x0010 /* Keypad Rotary Encoder register */
-#define KPMK 0x0018 /* Keypad Matrix Key register */
-#define KPAS 0x0020 /* Keypad Automatic Scan register */
+#define KPC 0x0000 /* Keypad Control register */
+#define KPDK 0x0008 /* Keypad Direct Key register */
+#define KPREC 0x0010 /* Keypad Rotary Encoder register */
+#define KPMK 0x0018 /* Keypad Matrix Key register */
+#define KPAS 0x0020 /* Keypad Automatic Scan register */
/* Keypad Automatic Scan Multiple Key Presser register 0-3 */
-#define KPASMKP0 0x0028
-#define KPASMKP1 0x0030
-#define KPASMKP2 0x0038
-#define KPASMKP3 0x0040
-#define KPKDI 0x0048
+#define KPASMKP0 0x0028
+#define KPASMKP1 0x0030
+#define KPASMKP2 0x0038
+#define KPASMKP3 0x0040
+#define KPKDI 0x0048
/* bit definitions */
-#define KPC_MKRN(n) ((((n) - 1) & 0x7) << 26) /* matrix key row number */
-#define KPC_MKCN(n) ((((n) - 1) & 0x7) << 23) /* matrix key column number */
-#define KPC_DKN(n) ((((n) - 1) & 0x7) << 6) /* direct key number */
-
-#define KPC_AS (0x1 << 30) /* Automatic Scan bit */
-#define KPC_ASACT (0x1 << 29) /* Automatic Scan on Activity */
-#define KPC_MI (0x1 << 22) /* Matrix interrupt bit */
-#define KPC_IMKP (0x1 << 21) /* Ignore Multiple Key Press */
-
-#define KPC_MS(n) (0x1 << (13 + (n))) /* Matrix scan line 'n' */
-#define KPC_MS_ALL (0xff << 13)
-
-#define KPC_ME (0x1 << 12) /* Matrix Keypad Enable */
-#define KPC_MIE (0x1 << 11) /* Matrix Interrupt Enable */
-#define KPC_DK_DEB_SEL (0x1 << 9) /* Direct Keypad Debounce Select */
-#define KPC_DI (0x1 << 5) /* Direct key interrupt bit */
-#define KPC_RE_ZERO_DEB (0x1 << 4) /* Rotary Encoder Zero Debounce */
-#define KPC_REE1 (0x1 << 3) /* Rotary Encoder1 Enable */
-#define KPC_REE0 (0x1 << 2) /* Rotary Encoder0 Enable */
-#define KPC_DE (0x1 << 1) /* Direct Keypad Enable */
-#define KPC_DIE (0x1 << 0) /* Direct Keypad interrupt Enable */
-
-#define KPDK_DKP (0x1 << 31)
-#define KPDK_DK(n) ((n) & 0xff)
-
-#define KPREC_OF1 (0x1 << 31)
-#define kPREC_UF1 (0x1 << 30)
-#define KPREC_OF0 (0x1 << 15)
-#define KPREC_UF0 (0x1 << 14)
-
-#define KPREC_RECOUNT0(n) ((n) & 0xff)
-#define KPREC_RECOUNT1(n) (((n) >> 16) & 0xff)
-
-#define KPMK_MKP (0x1 << 31)
-#define KPAS_SO (0x1 << 31)
-#define KPASMKPx_SO (0x1 << 31)
-
-#define KPAS_MUKP(n) (((n) >> 26) & 0x1f)
-#define KPAS_RP(n) (((n) >> 4) & 0xf)
-#define KPAS_CP(n) ((n) & 0xf)
-
-#define KPASMKP_MKC_MASK (0xff)
+#define KPC_MKRN_MASK GENMASK(28, 26)
+#define KPC_MKCN_MASK GENMASK(25, 23)
+#define KPC_DKN_MASK GENMASK(8, 6)
+#define KPC_MKRN(n) FIELD_PREP(KPC_MKRN_MASK, (n) - 1)
+#define KPC_MKCN(n) FIELD_PREP(KPC_MKCN_MASK, (n) - 1)
+#define KPC_DKN(n) FIELD_PREP(KPC_DKN_MASK, (n) - 1)
+
+#define KPC_AS BIT(30) /* Automatic Scan bit */
+#define KPC_ASACT BIT(29) /* Automatic Scan on Activity */
+#define KPC_MI BIT(22) /* Matrix interrupt bit */
+#define KPC_IMKP BIT(21) /* Ignore Multiple Key Press */
+
+#define KPC_MS(n) BIT(13 + (n)) /* Matrix scan line 'n' */
+#define KPC_MS_ALL GENMASK(20, 13)
+
+#define KPC_ME BIT(12) /* Matrix Keypad Enable */
+#define KPC_MIE BIT(11) /* Matrix Interrupt Enable */
+#define KPC_DK_DEB_SEL BIT(9) /* Direct Keypad Debounce Select */
+#define KPC_DI BIT(5) /* Direct key interrupt bit */
+#define KPC_RE_ZERO_DEB BIT(4) /* Rotary Encoder Zero Debounce */
+#define KPC_REE1 BIT(3) /* Rotary Encoder1 Enable */
+#define KPC_REE0 BIT(2) /* Rotary Encoder0 Enable */
+#define KPC_DE BIT(1) /* Direct Keypad Enable */
+#define KPC_DIE BIT(0) /* Direct Keypad interrupt Enable */
+
+#define KPDK_DKP BIT(31)
+#define KPDK_DK_MASK GENMASK(7, 0)
+#define KPDK_DK(n) FIELD_GET(KPDK_DK_MASK, n)
+
+#define KPREC_OF1 BIT(31)
+#define KPREC_UF1 BIT(30)
+#define KPREC_OF0 BIT(15)
+#define KPREC_UF0 BIT(14)
+
+#define KPREC_RECOUNT0_MASK GENMASK(7, 0)
+#define KPREC_RECOUNT1_MASK GENMASK(23, 16)
+#define KPREC_RECOUNT0(n) FIELD_GET(KPREC_RECOUNT0_MASK, n)
+#define KPREC_RECOUNT1(n) FIELD_GET(KPREC_RECOUNT1_MASK, n)
+
+#define KPMK_MKP BIT(31)
+#define KPAS_SO BIT(31)
+#define KPASMKPx_SO BIT(31)
+
+#define KPAS_MUKP_MASK GENMASK(30, 26)
+#define KPAS_RP_MASK GENMASK(7, 4)
+#define KPAS_CP_MASK GENMASK(3, 0)
+#define KPAS_MUKP(n) FIELD_GET(KPAS_MUKP_MASK, n)
+#define KPAS_RP(n) FIELD_GET(KPAS_RP_MASK, n)
+#define KPAS_CP(n) FIELD_GET(KPAS_CP_MASK, n)
+
+#define KPASMKP_MKC_MASK GENMASK(7, 0)
#define keypad_readl(off) __raw_readl(keypad->mmio_base + (off))
#define keypad_writel(off, v) __raw_writel((v), keypad->mmio_base + (off))
@@ -429,7 +439,7 @@ static void pxa27x_keypad_scan_matrix(struct pxa27x_keypad *keypad)
row >= pdata->matrix_key_rows)
goto scan;
- new_state[col] = (1 << row);
+ new_state[col] = BIT(row);
goto scan;
}
@@ -458,14 +468,14 @@ static void pxa27x_keypad_scan_matrix(struct pxa27x_keypad *keypad)
continue;
for (row = 0; row < pdata->matrix_key_rows; row++) {
- if ((bits_changed & (1 << row)) == 0)
+ if ((bits_changed & BIT(row)) == 0)
continue;
code = MATRIX_SCAN_CODE(row, col, keypad->row_shift);
input_event(input_dev, EV_MSC, MSC_SCAN, code);
input_report_key(input_dev, keypad->keycodes[code],
- new_state[col] & (1 << row));
+ new_state[col] & BIT(row));
}
}
input_sync(input_dev);
@@ -552,12 +562,12 @@ static void pxa27x_keypad_scan_direct(struct pxa27x_keypad *keypad)
return;
for (i = 0; i < pdata->direct_key_num; i++) {
- if (bits_changed & (1 << i)) {
+ if (bits_changed & BIT(i)) {
int code = MAX_MATRIX_KEY_NUM + i;
input_event(input_dev, EV_MSC, MSC_SCAN, code);
input_report_key(input_dev, keypad->keycodes[code],
- new_state & (1 << i));
+ new_state & BIT(i));
}
}
input_sync(input_dev);
@@ -627,7 +637,7 @@ static void pxa27x_keypad_config(struct pxa27x_keypad *keypad)
if (pdata->direct_key_mask)
keypad->direct_key_mask = pdata->direct_key_mask;
else
- keypad->direct_key_mask = ((1 << direct_key_num) - 1) & ~mask;
+ keypad->direct_key_mask = GENMASK(direct_key_num - 1, 0) & ~mask;
/* enable direct key */
if (direct_key_num)
--
2.51.0.rc1.163.g2494970778-goog
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