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sh: always enable sh7724 vpu_clk and set to 166MHz on Ecovec 

Update the sh7724 processor code to always enable vpu_clk.

On the Ecovec board, set the vpu_clk to 166 Mhz.

The 166MHz setting results in a divide-by-6 setup for
vpu_clk and improves the VPU performance compared to the
power-on-reset/bootloader configuration.

Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Magnus Damm 2010-02-19 09:33:47 +00:00 committed by Paul Mundt
parent 7be85c6eb4
commit 6f26d19fce
2 changed files with 6 additions and 1 deletions
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5
arch/sh/boards/mach-ecovec24/setup.c
View File

@ -1121,6 +1121,11 @@ static int __init arch_setup(void)
gpio_request(GPIO_FN_INTC_IRQ1, NULL);
gpio_direction_input(GPIO_FN_INTC_IRQ1);
/* set VPU clock to 166 MHz */
clk = clk_get(NULL, "vpu_clk");
clk_set_rate(clk, clk_round_rate(clk, 166000000));
clk_put(clk);
/* enable I2C device */
i2c_register_board_info(0, i2c0_devices,
ARRAY_SIZE(i2c0_devices));

2
arch/sh/kernel/cpu/sh4a/clock-sh7724.c
View File

@ -159,7 +159,7 @@ struct clk div4_clks[DIV4_NR] = {
[DIV4_SH] = DIV4("shyway_clk", FRQCRA, 12, 0x2f7c, CLK_ENABLE_ON_INIT),
[DIV4_B] = DIV4("bus_clk", FRQCRA, 8, 0x2f7c, CLK_ENABLE_ON_INIT),
[DIV4_P] = DIV4("peripheral_clk", FRQCRA, 0, 0x2f7c, 0),
[DIV4_M1] = DIV4("vpu_clk", FRQCRB, 4, 0x2f7c, 0),
[DIV4_M1] = DIV4("vpu_clk", FRQCRB, 4, 0x2f7c, CLK_ENABLE_ON_INIT),
};
struct clk div6_clks[] = {