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[86.139.30.37]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-464f0aac3fdsm238940435e9.1.2025.09.23.07.45.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 23 Sep 2025 07:45:29 -0700 (PDT) From: Biju X-Google-Original-From: Biju To: =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?= , Geert Uytterhoeven , Magnus Damm Cc: Biju Das , linux-pwm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-renesas-soc@vger.kernel.org, Prabhakar Mahadev Lad , Biju Das , Tommaso Merciai Subject: [PATCH v3 4/8] pwm: rzg2l-gpt: Add calculate_prescale() callback to struct rzg2l_gpt_info Date: Tue, 23 Sep 2025 15:45:08 +0100 Message-ID: <20250923144524.191892-5-biju.das.jz@bp.renesas.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250923144524.191892-1-biju.das.jz@bp.renesas.com> References: <20250923144524.191892-1-biju.das.jz@bp.renesas.com> 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" From: Biju Das RZ/G2L GPT the prescale factors are continuous power of 4 whereas on RZ/G3E it is power of 2 but discontinuous. Add calculate_prescale() callback to struct rzg2l_gpt_info for handling this difference. Reviewed-by: Tommaso Merciai Signed-off-by: Biju Das --- v2->v3: * No change. v1->v2: * Collected tag. --- drivers/pwm/pwm-rzg2l-gpt.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/drivers/pwm/pwm-rzg2l-gpt.c b/drivers/pwm/pwm-rzg2l-gpt.c index d1baac37c771..0af3aaf1917a 100644 --- a/drivers/pwm/pwm-rzg2l-gpt.c +++ b/drivers/pwm/pwm-rzg2l-gpt.c @@ -90,6 +90,7 @@ #define RZG2L_MAX_TICKS ((u64)U32_MAX * RZG2L_MAX_SCALE_FACTOR) =20 struct rzg2l_gpt_info { + u8 (*calculate_prescale)(u64 period); u32 gtcr_tpcs_mask; u8 prescale_pow_of_two_mult_factor; }; @@ -138,8 +139,7 @@ static void rzg2l_gpt_modify(struct rzg2l_gpt_chip *rzg= 2l_gpt, u32 reg, u32 clr, (rzg2l_gpt_read(rzg2l_gpt, reg) & ~clr) | set); } =20 -static u8 rzg2l_gpt_calculate_prescale(struct rzg2l_gpt_chip *rzg2l_gpt, - u64 period_ticks) +static u8 rzg2l_gpt_calculate_prescale(u64 period_ticks) { u32 prescaled_period_ticks; u8 prescale; @@ -296,7 +296,7 @@ static int rzg2l_gpt_round_waveform_tohw(struct pwm_chi= p *chip, period_ticks =3D rzg2l_gpt->period_ticks[ch]; } =20 - wfhw->prescale =3D rzg2l_gpt_calculate_prescale(rzg2l_gpt, period_ticks); + wfhw->prescale =3D info->calculate_prescale(period_ticks); pv =3D rzg2l_gpt_calculate_pv_or_dc(info, period_ticks, wfhw->prescale); wfhw->gtpr =3D pv; if (is_small_second_period) @@ -498,6 +498,7 @@ static int rzg2l_gpt_probe(struct platform_device *pdev) } =20 static const struct rzg2l_gpt_info rzg2l_data =3D { + .calculate_prescale =3D rzg2l_gpt_calculate_prescale, .gtcr_tpcs_mask =3D GENMASK(26, 24), .prescale_pow_of_two_mult_factor =3D 2, }; --=20 2.43.0