From nobody Sat Feb 7 07:28:50 2026 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 094B217F5 for ; Tue, 30 Apr 2024 01:15:10 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714439712; cv=none; b=lGZQb64gFuc6I95Bp3B5ed/eIhngDjY9Z+cF/yN0dNvTI8UPLSmmS42xaKAne90Zj9eu/R0GUhQbJ+oZqKp6XFXdC1CPKpXTjBQcLbxFo3W+VFEN3AOFCS06416k+40pE45RuJQxkwSGt94610JXaLL4GkAlgaJCCoBrVtUO88Y= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714439712; c=relaxed/simple; bh=gQYHXdjYcm9SnzVQ18TbG2wPyA/Wtk9x8tzzwzKjkE8=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=GgKmEvwIGZa865R5YgAJMJRmIfDZ6HsFSmpSWMaEAwvHXR27w/v5ndWS9qjHCi5p5mtZ08tKu1rF+ekmKmBkA/vMncIcRY9AUFMde0pIYc7+/l+qfUzkULgXZLAmre22F11os946t4w4zVLsgPNUgLQG1fjkderjvLszW38VwZM= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=sz3G6uQo; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="sz3G6uQo" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9B3A4C113CD; Tue, 30 Apr 2024 01:15:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1714439710; bh=gQYHXdjYcm9SnzVQ18TbG2wPyA/Wtk9x8tzzwzKjkE8=; h=From:To:Cc:Subject:Date:From; b=sz3G6uQoo+dXL/o10QUko0rSzSmyUBJqE/A4kr7Z1Gm5h5H7Tnd5CkjOWlSJhnq2L eLBeuv020xBXOlvMtEVIRlfMEn9BVi8Wjre3VabwRe0ltUCe7z25ppMwxLui2LGRsN 5Xdv3WPz2ecJvvaN6sjH9ocR+XqxApOrqJm7mkztWD8xMAy+Gj3jk2hf36gyEacayV fJrU3sZn6EiO1NWwQ2K2ZO3137N1bcGXiG2/LRyoP8jYRz9eeL2GQg0jZqDuupRICb OhiJGmfNS6AXnGPapd9QrCVWYG6MFSm+Oltc0HyrDecDdlWEWzU5bGwbOhGGsfXg0N Fook4ARNfV69A== From: Jisheng Zhang To: Liam Girdwood , Mark Brown Cc: linux-kernel@vger.kernel.org Subject: [PATCH] regulator: rt5739: Enable REGCACHE_FLAT Date: Tue, 30 Apr 2024 09:01:40 +0800 Message-ID: <20240430010140.2027-1-jszhang@kernel.org> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Enable regmap cache to reduce i2c transactions and corresponding interrupts if regulator is accessed frequently. Since the register map is small, we use a FLAT regmap cache. Signed-off-by: Jisheng Zhang --- drivers/regulator/rt5739.c | 38 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+) diff --git a/drivers/regulator/rt5739.c b/drivers/regulator/rt5739.c index 91412c905ce6..47172b11301c 100644 --- a/drivers/regulator/rt5739.c +++ b/drivers/regulator/rt5739.c @@ -24,8 +24,11 @@ #define RT5739_REG_NSEL1 0x01 #define RT5739_REG_CNTL1 0x02 #define RT5739_REG_ID1 0x03 +#define RT5739_REG_ID2 0x04 +#define RT5739_REG_MON 0x05 #define RT5739_REG_CNTL2 0x06 #define RT5739_REG_CNTL4 0x08 +#define RT5739_MAX_REGS (RT5739_REG_CNTL4 + 1) =20 #define RT5739_VSEL_MASK GENMASK(7, 0) #define RT5739_MODEVSEL1_MASK BIT(1) @@ -236,11 +239,46 @@ static void rt5739_init_regulator_desc(struct regulat= or_desc *desc, } } =20 +static bool rt5739_writeable_reg(struct device *dev, unsigned int reg) +{ + switch (reg) { + case RT5739_REG_NSEL0 ... RT5739_REG_CNTL1: + case RT5739_REG_CNTL2: + case RT5739_REG_CNTL4: + return true; + default: + return false; + } +} + +static bool rt5739_readable_reg(struct device *dev, unsigned int reg) +{ + switch (reg) { + case RT5739_REG_NSEL0 ... RT5739_REG_CNTL2: + case RT5739_REG_CNTL4: + return true; + default: + return false; + } +} + +static bool rt5739_volatile_reg(struct device *dev, unsigned int reg) +{ + if (reg =3D=3D RT5739_REG_MON) + return true; + return false; +} + static const struct regmap_config rt5739_regmap_config =3D { .name =3D "rt5739", .reg_bits =3D 8, .val_bits =3D 8, .max_register =3D RT5739_REG_CNTL4, + .num_reg_defaults_raw =3D RT5739_MAX_REGS, + .cache_type =3D REGCACHE_FLAT, + .writeable_reg =3D rt5739_writeable_reg, + .readable_reg =3D rt5739_readable_reg, + .volatile_reg =3D rt5739_volatile_reg, }; =20 static int rt5739_probe(struct i2c_client *i2c) --=20 2.43.0