diff options
| author | David Brownell <david-b@pacbell.net> | 2008-02-08 15:21:21 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2008-02-08 20:22:38 +0300 |
| commit | 9a1e8eb1f0b76b5e72a2343ad881c81b08dd6410 (patch) | |
| tree | f844d0e1316b49fd66cf773009ba2c3d46fcd18f /arch | |
| parent | c8cece84c9f36410de5164735e909603426e4d5f (diff) | |
| download | linux-9a1e8eb1f0b76b5e72a2343ad881c81b08dd6410.tar.xz | |
Basic PWM driver for AVR32 and AT91
PWM device setup, and a simple PWM driver exposing a programming interface
giving access to each channel's full capabilities. Note that this doesn't
support starting several channels in synch.
[hskinnemoen@atmel.com: allocate platform device dynamically]
[hskinnemoen@atmel.com: Kconfig fix]
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
Cc: Andrew Victor <linux@maxim.org.za>
Cc: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/avr32/mach-at32ap/at32ap700x.c | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/arch/avr32/mach-at32ap/at32ap700x.c b/arch/avr32/mach-at32ap/at32ap700x.c index 14e61f05e1f6..7678fee9a885 100644 --- a/arch/avr32/mach-at32ap/at32ap700x.c +++ b/arch/avr32/mach-at32ap/at32ap700x.c @@ -1186,6 +1186,59 @@ err_dup_modedb: #endif /* -------------------------------------------------------------------- + * PWM + * -------------------------------------------------------------------- */ +static struct resource atmel_pwm0_resource[] __initdata = { + PBMEM(0xfff01400), + IRQ(24), +}; +static struct clk atmel_pwm0_mck = { + .name = "mck", + .parent = &pbb_clk, + .mode = pbb_clk_mode, + .get_rate = pbb_clk_get_rate, + .index = 5, +}; + +struct platform_device *__init at32_add_device_pwm(u32 mask) +{ + struct platform_device *pdev; + + if (!mask) + return NULL; + + pdev = platform_device_alloc("atmel_pwm", 0); + if (!pdev) + return NULL; + + if (platform_device_add_resources(pdev, atmel_pwm0_resource, + ARRAY_SIZE(atmel_pwm0_resource))) + goto out_free_pdev; + + if (platform_device_add_data(pdev, &mask, sizeof(mask))) + goto out_free_pdev; + + if (mask & (1 << 0)) + select_peripheral(PA(28), PERIPH_A, 0); + if (mask & (1 << 1)) + select_peripheral(PA(29), PERIPH_A, 0); + if (mask & (1 << 2)) + select_peripheral(PA(21), PERIPH_B, 0); + if (mask & (1 << 3)) + select_peripheral(PA(22), PERIPH_B, 0); + + atmel_pwm0_mck.dev = &pdev->dev; + + platform_device_add(pdev); + + return pdev; + +out_free_pdev: + platform_device_put(pdev); + return NULL; +} + +/* -------------------------------------------------------------------- * SSC * -------------------------------------------------------------------- */ static struct resource ssc0_resource[] = { @@ -1646,6 +1699,7 @@ struct clk *at32_clock_list[] = { &atmel_usart1_usart, &atmel_usart2_usart, &atmel_usart3_usart, + &atmel_pwm0_mck, #if defined(CONFIG_CPU_AT32AP7000) &macb0_hclk, &macb0_pclk, |