diff options
| author | Stefan Agner <stefan.agner@toradex.com> | 2017-03-03 19:23:05 -0800 |
|---|---|---|
| committer | Marcel Ziswiler <marcel.ziswiler@toradex.com> | 2017-04-03 15:13:06 +0200 |
| commit | 3e92301d12417baf5ed424da3a64081243eda2c2 (patch) | |
| tree | 12559c08a7183d26efd296a21bc6ff04ea5364fa | |
| parent | 0666dae4b839135b6441b773b7ec9a24b0fb93ad (diff) | |
ARM: imx: busfreq: request bus frequency depending on M4 clock
Only request high bus frequency for Cortex-M4 if the Cortex-M4 is
running in a high frequency mode. The Cortex-M4 clock is not
directly connected with the bus frequency, however, we assume that
when the M4 CPU is running at lower frequency a lower bus speed is
sufficient too.
The driver already has been doing this on i.MX 6SoloX, this change
applies the same logic to i.MX 7.
Signed-off-by: Stefan Agner <stefan.agner@toradex.com>
Acked-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
| -rw-r--r-- | arch/arm/mach-imx/busfreq-imx.c | 8 |
1 files changed, 3 insertions, 5 deletions
diff --git a/arch/arm/mach-imx/busfreq-imx.c b/arch/arm/mach-imx/busfreq-imx.c index 8bafe4bf05a3..f1326582ca44 100644 --- a/arch/arm/mach-imx/busfreq-imx.c +++ b/arch/arm/mach-imx/busfreq-imx.c @@ -1085,7 +1085,7 @@ static int busfreq_probe(struct platform_device *pdev) } } - if (cpu_is_imx6sx()) { + if (cpu_is_imx6sx() || cpu_is_imx7d()) { m4_clk = devm_clk_get(&pdev->dev, "m4"); if (IS_ERR(m4_clk)) { dev_err(busfreq_dev, "%s: failed to get m4 clk.\n", __func__); @@ -1225,17 +1225,15 @@ static int busfreq_probe(struct platform_device *pdev) err = init_mmdc_lpddr2_settings(pdev); } - if (cpu_is_imx6sx()) { + if (cpu_is_imx6sx() || cpu_is_imx7d()) { /* if M4 is enabled and rate > 24MHz, add high bus count */ if (imx_src_is_m4_enabled() && (clk_get_rate(m4_clk) > LPAPM_CLK)) high_bus_count++; } - if (cpu_is_imx7d() && imx_src_is_m4_enabled()) { - high_bus_count++; + if (cpu_is_imx7d() && imx_src_is_m4_enabled()) imx_mu_lpm_ready(true); - } if (err) { dev_err(busfreq_dev, "Busfreq init of ddr controller failed\n"); |