[PATCH] clk: imx: pll14xx: Add 320 MHz and 640 MHz entries for PLL146x

Marek Vasut marex at denx.de
Mon Oct 31 13:48:38 PDT 2022


The PLL146x is used to implement SYS_PLL3 on i.MX8MP and can be used
to drive UARTn_ROOT clock. By setting the PLL3 to 320 MHz or 640 MHz,
the PLL3 output can be divided down to supply UARTn_ROOT clock with
precise 64 MHz, which divided down further by 16x oversampling factor
used by the i.MX UART core yields 4 Mbdps baud base for the UART IP.
This is useful e.g. for BCM bluetooth chips, which can operate up to
4 Mbdps.

Add 320 MHz and 640 MHz entries so the PLL can be configured accordingly.

Signed-off-by: Marek Vasut <marex at denx.de>
---
Cc: Abel Vesa <abel.vesa at nxp.com>
Cc: Fabio Estevam <festevam at gmail.com>
Cc: Sascha Hauer <s.hauer at pengutronix.de>
Cc: Shawn Guo <shawnguo at kernel.org>
Cc: Stephen Boyd <sboyd at kernel.org>
Cc: NXP Linux Team <linux-imx at nxp.com>
Cc: linux-arm-kernel at lists.infradead.org
To: linux-clk at vger.kernel.org
---
 drivers/clk/imx/clk-pll14xx.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/clk/imx/clk-pll14xx.c b/drivers/clk/imx/clk-pll14xx.c
index 1d0f79e9c3467..828336873a98f 100644
--- a/drivers/clk/imx/clk-pll14xx.c
+++ b/drivers/clk/imx/clk-pll14xx.c
@@ -54,7 +54,9 @@ static const struct imx_pll14xx_rate_table imx_pll1416x_tbl[] = {
 	PLL_1416X_RATE(800000000U,  200, 3, 1),
 	PLL_1416X_RATE(750000000U,  250, 2, 2),
 	PLL_1416X_RATE(700000000U,  350, 3, 2),
+	PLL_1416X_RATE(640000000U,  320, 3, 2),
 	PLL_1416X_RATE(600000000U,  300, 3, 2),
+	PLL_1416X_RATE(320000000U,  160, 3, 2),
 };
 
 static const struct imx_pll14xx_rate_table imx_pll1443x_tbl[] = {
-- 
2.35.1




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