[U-Boot] [PATCH] ARM: DRA7: Fixup DSP OPP_HIGH clock rate on DRA76P/DRA77P SoCs

[Suman Anna]

The commit 1b42ab3eda8a ("ARM: DRA7: Fixup DSPEVE, IVA and GPU clock
frequencies based on OPP") added the core logic to update the kernel
device-tree blob to adjust the DSP, IVA and GPU DPLL clocks based on
a one-time OPP choice selected in U-Boot for most of the DRA7xx/AM57xx
family of SoCs.

The DSPs on DRA76xP/DRA77xP SoCs (DRA76x ACD package SoCs) though
provide a higher performance and can run at a higher clock frequency
of 850 MHz at OPP_HIGH instead of 750 MHz. Fix up the logic to use the
correct clock rates on these SoCs. Note that this higher clock rate is
not applicable to other Jacinto 6 Plus SoCs (DRA75xP/DRA74xP SoCs or
AM574x SoCs) that follow the ABZ package.

Signed-off-by: Suman Anna <s-anna at ti.com>
---
 arch/arm/mach-omap2/omap5/fdt.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/arch/arm/mach-omap2/omap5/fdt.c b/arch/arm/mach-omap2/omap5/fdt.c
index 8dee555c10c6..5ba8806dd744 100644
--- a/arch/arm/mach-omap2/omap5/fdt.c
+++ b/arch/arm/mach-omap2/omap5/fdt.c
@@ -180,6 +180,14 @@ u32 dra7_opp_dsp_clk_rates[NUM_OPPS][OPP_DSP_CLK_NUM] = {
 	{750000000, 750000000, 500000000}, /* OPP_HIGH */
 };
 
+/* DSP clock rates on DRA76x ACD-package based SoCs */
+u32 dra76_opp_dsp_clk_rates[NUM_OPPS][OPP_DSP_CLK_NUM] = {
+	{}, /* OPP_LOW */
+	{600000000, 600000000, 400000000}, /* OPP_NOM */
+	{700000000, 700000000, 466666667}, /* OPP_OD */
+	{850000000, 850000000, 566666667}, /* OPP_HIGH */
+};
+
 /* IVA voltage domain */
 u32 dra7_opp_iva_clk_rates[NUM_OPPS][OPP_IVA_CLK_NUM] = {
 	{}, /* OPP_LOW */
@@ -257,6 +265,10 @@ static void ft_opp_clock_fixups(void *fdt, bd_t *bd)
 	/* fixup DSP clocks */
 	clk_names = dra7_opp_dsp_clk_names;
 	clk_rates = dra7_opp_dsp_clk_rates[get_voltrail_opp(VOLT_EVE)];
+	/* adjust for higher OPP_HIGH clock rate on DRA76xP/DRA77xP SoCs */
+	if (is_dra76x_acd())
+		clk_rates = dra76_opp_dsp_clk_rates[get_voltrail_opp(VOLT_EVE)];
+
 	ret = ft_fixup_clocks(fdt, clk_names, clk_rates, OPP_DSP_CLK_NUM);
 	if (ret) {
 		printf("ft_fixup_clocks failed for DSP voltage domain: %s\n",
-- 
2.23.0