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>
diff --git a/arch/avr32/mach-at32ap/at32ap700x.c b/arch/avr32/mach-at32ap/at32ap700x.c
index 14e61f0..7678fee 100644
--- a/arch/avr32/mach-at32ap/at32ap700x.c
+++ b/arch/avr32/mach-at32ap/at32ap700x.c
@@ -1186,6 +1186,59 @@
#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 @@
&atmel_usart1_usart,
&atmel_usart2_usart,
&atmel_usart3_usart,
+ &atmel_pwm0_mck,
#if defined(CONFIG_CPU_AT32AP7000)
&macb0_hclk,
&macb0_pclk,