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i3c: mipi-i3c-hci-pci: Factor out intel_reset()

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For neatness, factor out intel_reset().

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Link: https://patch.msgid.link/20251128064038.55158-8-adrian.hunter@intel.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
This commit is contained in:
Adrian Hunter 2025-11-28 08:40:33 +02:00 committed by Alexandre Belloni
parent 9dfa23c415
commit 6f6efdd15c
1 changed files with 13 additions and 7 deletions
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20
drivers/i3c/master/mipi-i3c-hci/mipi-i3c-hci-pci.c
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@ -27,6 +27,18 @@ static DEFINE_IDA(mipi_i3c_hci_pci_ida);
#define INTEL_RESETS_RESET_DONE BIT(1)
#define INTEL_RESETS_TIMEOUT_US (10 * USEC_PER_MSEC)
static void intel_reset(void __iomem *priv)
{
u32 reg;
/* Assert reset, wait for completion and release reset */
writel(0, priv + INTEL_RESETS);
readl_poll_timeout(priv + INTEL_RESETS, reg,
reg & INTEL_RESETS_RESET_DONE, 0,
INTEL_RESETS_TIMEOUT_US);
writel(INTEL_RESETS_RESET, priv + INTEL_RESETS);
}
static void __iomem *intel_priv(struct pci_dev *pci)
{
resource_size_t base = pci_resource_start(pci, 0);
@ -37,19 +49,13 @@ static void __iomem *intel_priv(struct pci_dev *pci)
static int intel_i3c_init(struct pci_dev *pci)
{
void __iomem *priv = intel_priv(pci);
u32 reg;
if (!priv)
return -ENOMEM;
dma_set_mask_and_coherent(&pci->dev, DMA_BIT_MASK(64));
/* Assert reset, wait for completion and release reset */
writel(0, priv + INTEL_RESETS);
readl_poll_timeout(priv + INTEL_RESETS, reg,
reg & INTEL_RESETS_RESET_DONE, 0,
INTEL_RESETS_TIMEOUT_US);
writel(INTEL_RESETS_RESET, priv + INTEL_RESETS);
intel_reset(priv);
return 0;
}